CN107483542B - Exception handling method and device for wireless sensor network - Google Patents
Exception handling method and device for wireless sensor network Download PDFInfo
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- CN107483542B CN107483542B CN201710583816.5A CN201710583816A CN107483542B CN 107483542 B CN107483542 B CN 107483542B CN 201710583816 A CN201710583816 A CN 201710583816A CN 107483542 B CN107483542 B CN 107483542B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0823—Errors, e.g. transmission errors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/563—Data redirection of data network streams
Abstract
The invention discloses an exception handling method and equipment for a wireless sensor network, which comprises the following steps: when the wireless access point of the Internet of things detects that the state of the first repeater is abnormal, the uplink bandwidth of the second repeater and the uplink bandwidth of the third repeater are obtained; when detecting that the uplink bandwidth of the second repeater is larger than or equal to the uplink bandwidth of the third repeater, sending a first cache data migration instruction to the first repeater, wherein the first cache data migration instruction is used for indicating the first repeater to send cache data to the second repeater; and receiving the cache data of the first repeater sent by the second repeater. The embodiment of the invention is beneficial to improving the stability and the anti-interference capability of the data transmission of the wireless sensor network.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to an exception handling method and device for a wireless sensor network.
Background
The wireless sensing network in the application of the Internet of things is composed of an Internet of things gateway, an Internet of things wireless access point, an Internet of things terminal and a repeater (the Internet of things terminal which is powered by a part of power supply and is internally provided with a routing algorithm can serve as the repeater), data acquisition is carried out through the Internet of things terminal, and data transmission is carried out through the Internet of things wireless access point and the Internet of things gateway. The internet of things has two meanings: firstly, the core and the foundation of the internet of things are still the internet, and the internet is an extended and expanded network on the basis of the internet; and secondly, the user side extends and expands to any article to perform information exchange and communication, namely, the article information. The internet of things is widely applied to network fusion through communication perception technologies such as intelligent perception, identification technology and pervasive computing, and is also called as the third wave of development of the world information industry after computers and the internet. The internet of things is an application expansion of the internet, and is not a network, but a business and an application.
At present, in a wireless sensor network of the internet of things, when a repeater fails and cannot perform effective uplink data transmission, cache data in the repeater is lost.
Disclosure of Invention
The invention provides an exception handling method of a wireless sensor network, which can improve the integrity and the real-time performance of data transmission when a repeater of the wireless sensor network is abnormal.
In a first aspect, an embodiment of the present invention provides an exception handling method for a wireless sensor network, which is applied to a wireless sensor network, where the wireless sensor network includes an internet of things wireless access point and N internet of things terminals, the N internet of things terminals include N1 terminals of internet of things powered by a battery and N2 terminals of internet of things powered by a power supply, a plurality of terminals of internet of things among the N2 terminals of internet of things powered by a power supply are used as repeaters of the wireless sensor network, each repeater includes a first repeater, a second repeater and a third repeater, N, N1 and N2 are integers greater than 1, and the sum of N1 and N2 is N, the method includes the following steps:
when the wireless access point of the Internet of things detects that the state of the first repeater is abnormal, the uplink bandwidth of the second repeater and the uplink bandwidth of the third repeater are obtained;
when detecting that the uplink bandwidth of the second repeater is greater than or equal to the uplink bandwidth of the third repeater, the internet of things wireless access point sends a first cache data migration instruction to the first repeater, wherein the first cache data migration instruction is used for indicating the first repeater to send cache data to the second repeater;
and the wireless access point of the Internet of things receives the cache data of the first repeater sent by the second repeater.
As can be seen from the above, in the embodiment of the present invention, when detecting that the state of the first repeater is abnormal, the wireless access point of the internet of things acquires the uplink bandwidth of the second repeater and the uplink bandwidth of the third repeater, and when detecting that the uplink bandwidth of the second repeater is greater than or equal to the uplink bandwidth of the third repeater, the wireless access point of the internet of things sends a first cache data migration instruction to the first repeater, where the first cache data migration instruction is used to instruct the first repeater to send cache data to the second repeater, and finally, receives the cache data sent by the second repeater. The larger the uplink bandwidth is, the higher the uplink data transmission rate of the repeater is, so that the wireless access point of the internet of things sends the cache data to the second repeater through the first repeater indicating the abnormal state, the cache data can be reported to the wireless access point by the second repeater with the lowest delay loss, the delay caused by the abnormal state of the first repeater is reduced as much as possible, the cache data of the first repeater is prevented from being discarded, and the completeness and the real-time performance of data transmission when the repeater of the wireless sensing network is abnormal are improved.
In one possible design, the method further includes:
when detecting that the uplink bandwidth of the second repeater is smaller than the uplink bandwidth of the third repeater, the internet of things wireless access point sends a second cache data migration instruction to the first repeater, and the second cache data migration instruction is used for indicating the first repeater to send cache data to the third repeater.
In one possible design, the method further includes:
the Internet of things wireless access point sends a mount removal instruction to the first repeater, and the mount removal instruction is used for indicating the first repeater to remove the mounted Internet of things terminal.
Therefore, in the possible design, after receiving the cache data of the first repeater in the abnormal state, the wireless access point of the internet of things sends a mount removal instruction to the first repeater so as to instruct the first repeater to remove the mounted terminal of the internet of things, so that the situation that the uplink data of the terminal of the internet of things is continuously transmitted to the first repeater to cause data accumulation and influence the stability of the wireless sensor network is avoided, and the stability of the wireless sensor network repeater in the abnormal state is favorably improved.
In one possible design, after the internet of things wireless access point sends the unmount instruction to the first repeater, the method further includes:
the wireless access point of the Internet of things sends a first equipment mounting instruction to the third repeater, the first equipment mounting instruction comprises an equipment identifier of the Internet of things terminal which is removed from mounting by the first repeater, and the equipment identifier is used for the third repeater to mount the Internet of things terminal which is removed from mounting by the first repeater.
Therefore, in the possible design, the wireless access point of the internet of things can further instruct the third repeater to mount the first repeater to remove the mounted terminal of the internet of things, so that the terminal of the internet of things, from which the first repeater is removed, can be added into the wireless sensor network again in time, data loss of the terminal of the internet of things is reduced, and the data transmission stability of the wireless sensor network is favorably improved.
In one possible design, after the internet of things wireless access point sends the unmount instruction to the first repeater, the method further includes:
the wireless access point of the Internet of things sends a second equipment mounting instruction to the second repeater, the second equipment mounting instruction comprises an equipment identifier of the Internet of things terminal which is not mounted by the first repeater, and the equipment identifier is used for mounting the Internet of things terminal which is not mounted by the first repeater by the second repeater.
Therefore, in the possible design, the wireless access point of the internet of things can further indicate the second repeater to mount the terminal of the internet of things, which is not mounted by the first repeater, so that the terminal of the internet of things, which is not mounted by the first repeater, is added into the wireless sensor network again in time, data loss of the terminal of the internet of things is reduced, and the stability of data transmission of the wireless sensor network is improved.
In a second aspect of the embodiments of the present invention, an internet of things wireless access point is provided, where the internet of things wireless access point has a function of implementing the internet of things wireless access point in the method design of the first aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.
Specifically, the wireless access point of the internet of things comprises a processing unit and a communication unit, wherein the processing unit is used for acquiring the uplink bandwidth of the second repeater and the uplink bandwidth of the third repeater through the communication unit when the state abnormality of the first repeater is detected; and when detecting that the uplink bandwidth of the second relay is greater than or equal to the uplink bandwidth of the third relay, sending a first cache data migration instruction to the first relay through the communication unit, where the first cache data migration instruction is used to instruct the first relay to send cache data to the second relay, and is used to receive the cache data of the first relay sent by the second relay through the communication unit.
In a possible design, the processing unit is further configured to send, by the communication unit, a second buffer data migration instruction to the first relay when it is detected that the uplink bandwidth of the second relay is smaller than the uplink bandwidth of the third relay, where the second buffer data migration instruction is used to instruct the first relay to send buffer data to the third relay, and is used to receive, by the communication unit, the buffer data of the first relay sent by the third relay.
In one possible design, the processing unit is further configured to send a mount release instruction to the first relay through the communication unit, where the mount release instruction is used to instruct the first relay to release the mounted internet of things terminal.
In one possible design, after the processing unit sends a mount release instruction to the first repeater through the communication unit, the processing unit is further configured to send a first device mount instruction to the third repeater through the communication unit, where the first device mount instruction includes a device identifier of the internet of things terminal where the first repeater is mounted, and the device identifier is used for the third repeater to mount the internet of things terminal where the first repeater is mounted.
In one possible design, after the processing unit sends the mount release instruction to the first repeater through the communication unit, the processing unit is further configured to send a second device mount instruction to the second repeater through the communication unit, where the second device mount instruction includes a device identifier of the internet of things terminal where the first repeater is mounted, and the device identifier is used for the second repeater to mount the internet of things terminal where the first repeater is mounted.
In a third aspect of the embodiments of the present invention, an internet of things wireless access point is provided, which includes a processor configured to support the internet of things wireless access point to perform corresponding functions in the method of the first aspect. Further, the internet of things wireless access point may further include a transceiver for supporting communication between the internet of things wireless access point and the internet of things terminal. Further, the wireless access point of the internet of things may further include a memory for coupling with the processor that retains program instructions and data necessary for the wireless access point of the internet of things.
In a fourth aspect of embodiments of the present invention, there is provided an internet of things wireless access point comprising one or more processors, memory, one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the program comprising instructions for performing any one of the steps of the method of the first aspect.
In a fifth aspect of the embodiments of the present invention, a computer-readable storage medium is provided, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps as described in any one of the methods of the first aspect of the embodiments of the present invention.
A sixth aspect of embodiments of the present invention provides a computer program product, wherein the computer program product comprises a non-transitory computer readable storage medium storing a computer program, the computer program being operable to cause a computer to perform some or all of the steps as described in any one of the methods of the first aspect of embodiments of the present invention. The computer program product may be a software installation package.
It can be seen that, in the embodiment of the present invention, when detecting that the state of the first repeater is abnormal, the internet of things wireless access point acquires the uplink bandwidth of the second repeater and the uplink bandwidth of the third repeater, and when detecting that the uplink bandwidth of the second repeater is greater than or equal to the uplink bandwidth of the third repeater, the internet of things wireless access point sends a first cache data migration instruction to the first repeater, where the first cache data migration instruction is used to instruct the first repeater to send cache data to the second repeater, and finally, receives the cache data sent by the second repeater. The larger the uplink bandwidth is, the higher the uplink data transmission rate of the repeater is, so that the wireless access point of the internet of things sends the cache data to the second repeater through the first repeater indicating the abnormal state, the cache data can be reported to the wireless access point by the second repeater with the lowest delay loss, the delay caused by the abnormal state of the first repeater is reduced as much as possible, the cache data of the first repeater is prevented from being discarded, and the completeness and the real-time performance of data transmission when the repeater of the wireless sensing network is abnormal are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a network architecture diagram of an exemplary wireless sensor network provided by an embodiment of the present invention;
fig. 2A is a schematic flowchart of an exception handling method for a wireless sensor network according to an embodiment of the present invention;
fig. 2B is a time slot structure diagram of an exemplary network beacon according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of an exception handling method for a wireless sensor network according to another embodiment of the present invention;
fig. 4 is a flowchart illustrating an exception handling method for a wireless sensor network according to another embodiment of the present invention
Fig. 5A is a functional unit block diagram of an internet of things wireless access point according to an embodiment of the present invention;
fig. 5B is a schematic structural diagram of an internet of things wireless access point according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The following is a detailed description of specific embodiments.
Referring to fig. 1, fig. 1 is a network architecture diagram of an exemplary wireless sensor network according to an embodiment of the present invention, where the wireless sensor network includes an internet of things gateway, an internet of things wireless access point in communication connection with the internet of things gateway, and an internet of things terminal in communication connection with the internet of things wireless access point, where the internet of things gateway is connected to the internet through media such as optical fibers, the internet of things gateway is connected to the internet of things wireless access point in a wireless manner, the internet of things wireless access point and the internet of things terminal are connected by using a star topology structure, frequency points of each internet of things wireless access point are different, the internet of things terminal that is not networked searches for an internet of things wireless access point that is most beneficial to itself in a frequency hopping manner, and communication networks constructed by the internet. The internet of things terminal comprises a battery-powered internet of things terminal and a power-powered internet of things terminal. The internet of things terminal powered by the power supply is embedded with a routing algorithm, when the internet of things terminal powered by a certain power supply is used as a repeater function, the embedded routing algorithm is started, and the internet of things terminal serves as the internet of things terminal and also serves as the repeater at the same time. Specifically, the wireless access point of the internet of things can identify whether the terminal of the internet of things is a battery-powered terminal of the internet of things or a power-powered terminal of the internet of things through a preset state identifier in the terminal of the internet of things during registration, so that the wireless access point of the internet of things can correctly select the repeater. When the terminal of the internet of things detects that the distance between the terminal of the internet of things and the wireless access point of the internet of things exceeds the preset maximum transmission distance, relay transmission needs to be completed through the repeater. An example wireless sensor network to which embodiments of the present invention are applicable may include a plurality of repeaters.
Referring to fig. 2A, fig. 2A is a schematic flowchart of an exception handling method for a wireless sensor network, which is applied to a wireless sensor network, where the wireless sensor network includes an internet of things wireless access point and N internet of things terminals, the N internet of things terminals include N1 battery-powered internet of things terminals and N2 power-powered internet of things terminals, a plurality of internet of things terminals among the N2 power-powered internet of things terminals serve as repeaters of the wireless sensor network, each repeater includes a first repeater, a second repeater, and a third repeater, N, N1 and N2 are integers greater than 1, and a sum of N1 and N2 is N, as shown in fig. 2A, the method includes:
s201, when the wireless access point of the Internet of things detects that the state of the first repeater is abnormal, acquiring the uplink bandwidth of the second repeater and the uplink bandwidth of the third repeater;
it can be understood that the specific implementation manner of the wireless access point of the internet of things when detecting the state abnormality of the first repeater may be various, and the embodiment of the present invention is not limited uniquely.
For example, if the wireless access point of the internet of things detects that the uplink data of the first repeater is not received in the current beacon period, it may be determined that the state of the first repeater is abnormal.
For another example, if the wireless access point of the internet of things receives the state exception message actively reported by the first repeater, it may be determined that the state of the first repeater is abnormal.
In the internet of things terminal connected to the wireless access point of the internet of things, the reporting mechanism of the internet of things terminal uses a technology combining an ordered competition mechanism (such as a time division multiple access technology) and an unordered competition mechanism, as shown in fig. 2B, the specific process is as follows: the wireless access point of the internet of things sends a frame of network beacon (with a period of T) in a broadcast mode outwards at regular time, the beacon period T is equally divided into n network time slots according to time division multiple access, each network time slot is delta T, at least one network time slot delta T is reserved for network access interaction of terminals of the internet of things which are not accessed to the network, n1 delta T in the rest delta T are allocated to terminals of the internet of things which are added to the network and are allocated with network numbers to carry out data interaction according to the network numbers of the terminals of the internet of things (the network numbers are allocated by the wireless access points of the internet of things when the terminals of the internet of things are added to the wireless access point network of the internet of things), and n2 delta T in the rest delta T are allocated to all terminals of.
The first repeater, the second repeater and the third repeater are all internet of things terminals with built-in routing algorithms, the internet of things terminals are communicated with one another, and the routing algorithms comprise frequency hopping and frequency division multiplexing algorithms and time division multiplexing algorithms. Controlling the repeater to transmit wireless signals through a frequency hopping and frequency division multiplexing algorithm, or controlling the repeater to transmit wireless signals through a time division multiplexing algorithm; it should be noted that, because the frequency resources of the whole network are limited, the repeater may determine whether to enable the frequency hopping and frequency division multiplexing algorithm or the time division multiplexing algorithm to complete the relay task according to the current available frequency resources. The following will describe in detail the case where the repeater transmits wireless signals by frequency hopping and frequency division multiplexing algorithms or transmits wireless signals by time division multiplexing algorithms, for example, when the repeater performs a repeating task, when the frequency resources are more and when the frequency resources are less:
specifically, if the frequency resources of the current whole network are more, that is, the frequency resources are not in shortage, each repeater of the wireless access point of the internet of things starts an embedded preset routing algorithm to select to transmit wireless signals through a frequency hopping algorithm and a frequency division multiplexing algorithm, and a relay task is completed. For example, one repeater and all internet of things terminals connected with the repeater jump to 436.1 frequency points to be used as relay frequency points for wireless communication, and the other repeater with all internet of things terminals connected with the repeater jump to 321 frequency points to be used as relay frequency points for communication; the repeater can communicate with the connected wireless access point of the Internet of things through a preset working frequency point; and in the same way, the relays communicate with each other through different relay frequency points. It can be understood that the allocation of the frequency points may be set according to actual needs, and is not further limited herein. At the moment, working frequency points are adopted for communication between the repeater and the wireless access point of the Internet of things, and relay frequency points are adopted for communication between the repeater and the remote terminal of the Internet of things.
If the frequency resources of the current whole network are less, namely the frequency resources are insufficient, the wireless access point of the Internet of things controls the repeater to start an embedded preset routing algorithm to select to complete a relay task through a time division multiplexing algorithm; for example, the time slots are weighted and allocated evenly by time resources of the whole network, the time slot of the first 100 seconds is allocated to one repeater, the time slot of the next 100 seconds is allocated to another repeater, and so on, and wireless communication is performed among the repeaters at different time points on the same frequency point. It is understood that the allocation of the time slots can be set according to actual needs, and is not further limited herein. It should be noted that in the process of time slot allocation, the time slot amount can be allocated according to the requirement of each repeater on the time slot; the preferred allocation control may be performed according to the priority of the repeater application. In the working process, each repeater sends the number of the relayed remote Internet of things terminals, the service quality and other information in the communication process to the Internet of things wireless access point in time, and the Internet of things wireless access point distributes time slots uniformly according to conditions.
S202, when detecting that the uplink bandwidth of the second repeater is greater than or equal to the uplink bandwidth of the third repeater, the Internet of things wireless access point sends a first cache data migration instruction to the first repeater, wherein the first cache data migration instruction is used for indicating the first repeater to send cache data to the second repeater;
the cache data may be uplink data of the internet of things terminal, which is received by the first repeater in a beacon period before the current beacon period, and the uplink data is cached in the first repeater because the uplink data of the internet of things terminal is not uploaded to the wireless access point of the internet of things synchronously in the previous beacon period due to abnormal state of the first repeater.
S203, the Internet of things wireless access point receives the cache data of the first repeater sent by the second repeater.
In a specific implementation, the second repeater may receive the cache data sent by the first repeater in the beacon period of the kth network beacon, and send the cache data to the internet of things wireless access point in the beacon period of the (k + 1) th network beacon, where correspondingly, the internet of things wireless access point receives the cache data in the beacon period of the (k + 1) th network beacon, and k is a positive integer.
It can be seen that, in the embodiment of the present invention, when detecting that the state of the first repeater is abnormal, the internet of things wireless access point acquires the uplink bandwidth of the second repeater and the uplink bandwidth of the third repeater, and when detecting that the uplink bandwidth of the second repeater is greater than or equal to the uplink bandwidth of the third repeater, the internet of things wireless access point sends a first cache data migration instruction to the first repeater, where the first cache data migration instruction is used to instruct the first repeater to send cache data to the second repeater, and finally, receives the cache data sent by the second repeater. The larger the uplink bandwidth is, the higher the uplink data transmission rate of the repeater is, so that the wireless access point of the internet of things sends the cache data to the second repeater through the first repeater indicating the abnormal state, the cache data can be reported to the wireless access point by the second repeater with the lowest delay loss, the delay caused by the abnormal state of the first repeater is reduced as much as possible, the cache data of the first repeater is prevented from being discarded, and the completeness and the real-time performance of data transmission when the repeater of the wireless sensing network is abnormal are improved.
In one example, the method further comprises:
when detecting that the uplink bandwidth of the second repeater is smaller than the uplink bandwidth of the third repeater, the internet of things wireless access point sends a second cache data migration instruction to the first repeater, wherein the second cache data migration instruction is used for indicating the first repeater to send cache data to the third repeater;
and the wireless access point of the Internet of things receives the cache data of the first repeater sent by the third repeater.
In one example, the method further comprises:
the Internet of things wireless access point sends a mount removal instruction to the first repeater, and the mount removal instruction is used for indicating the first repeater to remove the mounted Internet of things terminal.
As can be seen, in this example, after receiving the cache data of the first repeater in the abnormal state, the wireless access point of the internet of things sends a mount removal instruction to the first repeater to instruct the first repeater to remove the mounted terminal of the internet of things, so that it is avoided that uplink data of the terminal of the internet of things is continuously transmitted to the first repeater to cause data accumulation, which affects the stability of the wireless sensor network, and the stability of the wireless sensor network repeater in the abnormal state is favorably improved.
In one example, after the internet of things wireless access point sends a mount release instruction to the first relay, the method further comprises:
the wireless access point of the Internet of things sends a first equipment mounting instruction to the third repeater, the first equipment mounting instruction comprises an equipment identifier of the Internet of things terminal which is removed from mounting by the first repeater, and the equipment identifier is used for the third repeater to mount the Internet of things terminal which is removed from mounting by the first repeater.
In this example, the terminal of the internet of things mounted on the first repeater is in the non-network-access state after being unmounted, and the terminal of the internet of things will determine the idle network time slot of the network beacon after receiving the network beacon, and transmitting a frame to a third repeater transmitting the network beacon in an idle network time slot, the third repeater acquiring the network-in frame, determining the equipment identifier of the terminal of the Internet of things according to the network access frame, and when determining that the equipment identifier set comprises the equipment identifier by referring to the equipment identifier set carried in the first equipment mounting instruction, then a network label is distributed to the terminal of the Internet of things, a preset network time slot is sent to the terminal of the Internet of things to finish the network access operation, after the subsequent terminal of the Internet of things finishes time synchronization after receiving the network beacon, the network time slot for sending the uplink data by itself can be determined according to the network number of itself.
Therefore, in this example, the internet of things wireless access point can also instruct the third repeater to mount the internet of things terminal on which the first repeater is mounted, so that the internet of things terminal on which the first repeater is mounted is timely added into the wireless sensor network again, data loss of the internet of things terminal is reduced, and the stability of data transmission of the wireless sensor network is favorably improved.
In one example, after the internet of things wireless access point sends a mount release instruction to the first relay, the method further comprises:
the wireless access point of the Internet of things sends a second equipment mounting instruction to the second repeater, the second equipment mounting instruction comprises an equipment identifier of the Internet of things terminal which is not mounted by the first repeater, and the equipment identifier is used for mounting the Internet of things terminal which is not mounted by the first repeater by the second repeater.
Therefore, in this example, the internet of things wireless access point can also instruct the second repeater to mount the internet of things terminal on which the first repeater is not mounted, so that the internet of things terminal on which the first repeater is not mounted is added to the wireless sensor network again in time, data loss of the internet of things terminal is reduced, and the stability of data transmission of the wireless sensor network is improved.
Consistent with the embodiment shown in fig. 2A, please refer to fig. 3, where fig. 3 is a schematic flowchart of another method for handling an exception in a wireless sensor network according to an embodiment of the present invention, which is applied to a wireless sensor network, where the wireless sensor network includes an internet of things wireless access point and N internet of things terminals, the N internet of things terminals include N1 terminals of internet of things powered by a battery and N2 terminals of internet of things powered by a power supply, a plurality of terminals of internet of things among the N2 terminals of internet of things powered by a power supply are used as repeaters of the wireless sensor network, the repeaters include a first repeater, a second repeater and a third repeater, N, N1 and N2 are integers greater than 1, and a sum of N1 and N2 is N. As shown in the figure, the method for processing the exception of the wireless sensor network includes:
s301, when the wireless access point of the Internet of things detects that the state of the first repeater is abnormal, the uplink bandwidth of the second repeater and the uplink bandwidth of the third repeater are obtained;
s302, when detecting that the uplink bandwidth of the second repeater is greater than or equal to the uplink bandwidth of the third repeater, the Internet of things wireless access point sends a first cache data migration instruction to the first repeater, wherein the first cache data migration instruction is used for indicating the first repeater to send cache data to the second repeater;
and S303, the Internet of things wireless access point receives the cache data of the first repeater, which is sent by the second repeater.
S304, the Internet of things wireless access point sends a mount removal instruction to the first repeater, and the mount removal instruction is used for indicating the Internet of things terminal to which the first repeater is removed from mounting.
S305, the wireless access point of the Internet of things sends a first equipment mounting instruction to the third repeater, the first equipment mounting instruction comprises an equipment identifier of the terminal of the Internet of things which is dismounted by the first repeater, and the equipment identifier is used for the third repeater to mount the terminal of the Internet of things which is dismounted by the first repeater.
It can be seen that, in the embodiment of the present invention, when detecting that the state of the first repeater is abnormal, the internet of things wireless access point acquires the uplink bandwidth of the second repeater and the uplink bandwidth of the third repeater, and when detecting that the uplink bandwidth of the second repeater is greater than or equal to the uplink bandwidth of the third repeater, the internet of things wireless access point sends a first cache data migration instruction to the first repeater, where the first cache data migration instruction is used to instruct the first repeater to send cache data to the second repeater, and finally, receives the cache data sent by the second repeater. The larger the uplink bandwidth is, the higher the uplink data transmission rate of the repeater is, so that the wireless access point of the internet of things sends the cache data to the second repeater through the first repeater indicating the abnormal state, the cache data can be reported to the wireless access point by the second repeater with the lowest delay loss, the delay caused by the abnormal state of the first repeater is reduced as much as possible, the cache data of the first repeater is prevented from being discarded, and the completeness and the real-time performance of data transmission when the repeater of the wireless sensing network is abnormal are improved.
In addition, after receiving the cache data of the first repeater in the abnormal state, the wireless access point of the internet of things sends a mount removal instruction to the first repeater so as to instruct the first repeater to remove the mounted terminal of the internet of things, thereby avoiding the situation that the uplink data of the terminal of the internet of things is continuously transmitted to the first repeater to cause data accumulation, influencing the stability of the wireless sensor network and being beneficial to improving the stability of the wireless sensor network repeater in the abnormal state.
In addition, the wireless access point of the internet of things can also instruct the third repeater to mount the terminal of the internet of things, which is used for removing the first repeater from the mounting, so that the terminal of the internet of things, which is used for removing the first repeater from the mounting, can be added into the wireless sensor network again in time, the data loss of the terminal of the internet of things is reduced, and the data transmission stability of the wireless sensor network is favorably improved.
Consistent with the embodiment shown in fig. 2A and fig. 3, please refer to fig. 4, where fig. 4 is a schematic flowchart of an exception handling method for another wireless sensor network, which is applied to a wireless sensor network, where the wireless sensor network includes an internet of things wireless access point and N internet of things terminals, the N internet of things terminals include N1 battery-powered internet of things terminals and N2 power-powered internet of things terminals, a plurality of the N2 power-powered internet of things terminals serve as repeaters for the wireless sensor network, the repeaters include a first repeater, a second repeater and a third repeater, N, N1 and N2 are integers greater than 1, and a sum of N1 and N2 is N. As shown in the figure, the method for processing the exception of the wireless sensor network includes:
s401, when the wireless access point of the Internet of things detects that the state of the first repeater is abnormal, the uplink bandwidth of the second repeater and the uplink bandwidth of the third repeater are obtained;
s402, when detecting that the uplink bandwidth of the second repeater is greater than or equal to the uplink bandwidth of the third repeater, the Internet of things wireless access point sends a first cache data migration instruction to the first repeater, wherein the first cache data migration instruction is used for indicating the first repeater to send cache data to the second repeater;
s403, the Internet of things wireless access point receives the cache data of the first repeater sent by the second repeater.
S404, the Internet of things wireless access point sends a mount removal instruction to the first repeater, and the mount removal instruction is used for indicating the Internet of things terminal which is mounted on the first repeater to be removed.
S405, the Internet of things wireless access point sends a second equipment mounting instruction to the second repeater, the second equipment mounting instruction comprises an equipment identifier of the Internet of things terminal which is not mounted by the first repeater, and the equipment identifier is used for mounting the Internet of things terminal which is not mounted by the first repeater.
It can be seen that, in the embodiment of the present invention, when detecting that the state of the first repeater is abnormal, the internet of things wireless access point acquires the uplink bandwidth of the second repeater and the uplink bandwidth of the third repeater, and when detecting that the uplink bandwidth of the second repeater is greater than or equal to the uplink bandwidth of the third repeater, the internet of things wireless access point sends a first cache data migration instruction to the first repeater, where the first cache data migration instruction is used to instruct the first repeater to send cache data to the second repeater, and finally, receives the cache data sent by the second repeater. The larger the uplink bandwidth is, the higher the uplink data transmission rate of the repeater is, so that the wireless access point of the internet of things sends the cache data to the second repeater through the first repeater indicating the abnormal state, the cache data can be reported to the wireless access point by the second repeater with the lowest delay loss, the delay caused by the abnormal state of the first repeater is reduced as much as possible, the cache data of the first repeater is prevented from being discarded, and the completeness and the real-time performance of data transmission when the repeater of the wireless sensing network is abnormal are improved.
In addition, after receiving the cache data of the first repeater in the abnormal state, the wireless access point of the internet of things sends a mount removal instruction to the first repeater so as to instruct the first repeater to remove the mounted terminal of the internet of things, thereby avoiding the situation that the uplink data of the terminal of the internet of things is continuously transmitted to the first repeater to cause data accumulation, influencing the stability of the wireless sensor network and being beneficial to improving the stability of the wireless sensor network repeater in the abnormal state.
In addition, the wireless access point of the internet of things can also instruct the second repeater to mount the terminal of the internet of things, which is not mounted by the first repeater, so that the terminal of the internet of things, which is not mounted by the first repeater, is added into the wireless sensor network again in time, data loss of the terminal of the internet of things is reduced, and the stability of data transmission of the wireless sensor network is improved.
The above description has introduced the solution of the embodiment of the present invention mainly from the perspective of the method-side implementation process. It is understood that, in order to implement the above functions, the wireless access point of the internet of things includes a corresponding hardware structure and/or software module for performing each function. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, with the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
According to the method, the functional units of the wireless access point of the internet of things can be divided, for example, the functional units can be divided corresponding to the functions, or two or more functions can be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
Fig. 5A shows a possible structure diagram of the wireless access point of the internet of things involved in the above embodiments, in the case of an integrated unit. The internet of things wireless access point 500 includes: a processing unit 502 and a communication unit 503. Processing unit 502 is configured to control and manage actions of the internet of things wireless access point, for example, processing unit 502 is configured to support the internet of things wireless access point to perform steps S201 to S203 in fig. 2A, steps S301 to S305 in fig. 3, and steps S401 to S405 in fig. 4, and/or other processes for the techniques described herein. The communication unit 503 is configured to support communications between the internet-of-things wireless access point and other devices, for example, communications between the internet-of-things terminal and an internet-of-things gateway. The internet of things wireless access point may also include a storage unit 501 for storing program codes and data for the internet of things wireless access point.
The processing Unit 502 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 503 may be a communication interface, a transceiver circuit, etc., wherein the communication interface is a generic term and may include one or more interfaces. The storage unit 501 may be a memory.
The processing unit 502 is configured to, when it is detected that the state of the first relay is abnormal, obtain, through the communication unit 503, an uplink bandwidth of the second relay and an uplink bandwidth of the third relay; and is configured to send, through the communication unit 503, a first buffer data migration instruction to the first relay when it is detected that the uplink bandwidth of the second relay is greater than or equal to the uplink bandwidth of the third relay, where the first buffer data migration instruction is used to instruct the first relay to send buffer data to the second relay, and is used to receive, through the communication unit 503, the buffer data of the first relay sent by the second relay.
In a possible example, the processing unit 502 is further configured to send, by the communication unit 503, a second buffer data migration instruction to the first relay when it is detected that the uplink bandwidth of the second relay is smaller than the uplink bandwidth of the third relay, where the second buffer data migration instruction is used to instruct the first relay to send buffer data to the third relay, and is used to receive, by the communication unit 503, the buffer data of the first relay sent by the third relay.
In one possible example, the processing unit 502 is further configured to send, through the communication unit 503, a mount release instruction to the first relay, where the mount release instruction is used to instruct the first relay to release the mounted internet of things terminal.
In a possible example, after the processing unit 502 sends the unmount instruction to the first repeater through the communication unit 503, the processing unit is further configured to send a first device mount instruction to the third repeater through the communication unit 503, where the first device mount instruction includes a device identifier of the internet-of-things terminal unmounted by the first repeater, and the device identifier is used for the third repeater to mount the internet-of-things terminal unmounted by the first repeater.
In a possible example, after the processing unit 502 sends the unmount instruction to the first repeater through the communication unit 503, the processing unit is further configured to send a second device mount instruction to the second repeater through the communication unit 503, where the second device mount instruction includes a device identifier of the internet-of-things terminal unmounted by the first repeater, and the device identifier is used for the second repeater to mount the internet-of-things terminal unmounted by the first repeater.
When the processing unit 502 is a processor, the communication unit 503 is a communication interface, and the storage unit 501 is a memory, the wireless access point of the internet of things according to the embodiment of the present invention may be the wireless access point of the internet of things shown in fig. 5B.
Referring to fig. 5B, the internet of things wireless access point 510 includes: a processor 512, a transceiver 513, a memory 511. Optionally, the internet of things wireless access point 510 may further include a bus 514. Wherein, the transceiver 513, the processor 512 and the memory 511 may be connected to each other by a bus 514; the bus 514 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 514 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 5B, but this is not intended to represent only one bus or type of bus.
The internet of things wireless access point shown in fig. 5A or fig. 5B may also be understood as a device for the internet of things wireless access point, which is not limited in the embodiment of the present invention.
Embodiments of the present invention also provide an internet of things wireless access point, which includes one or more processors, memory, one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the program includes instructions for performing any one of the steps of the above method embodiments.
Embodiments of the present invention also provide a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in the above method embodiments.
Embodiments of the present invention also provide a computer program product, wherein the computer program product comprises a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps as described in the above method embodiments. The computer program product may be a software installation package.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus can be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a memory and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned memory comprises: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable memory, which may include: flash Memory disks, Read-Only memories (ROMs), Random Access Memories (RAMs), magnetic or optical disks, and the like.
The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (4)
1. An exception handling method for a wireless sensor network, the method comprising:
when the wireless access point of the Internet of things detects that the state of the first repeater is abnormal, the uplink bandwidth of the second repeater and the uplink bandwidth of the third repeater are obtained;
when detecting that the uplink bandwidth of the second repeater is greater than or equal to the uplink bandwidth of the third repeater, the internet of things wireless access point sends a first cache data migration instruction to the first repeater, wherein the first cache data migration instruction is used for indicating the first repeater to send cache data to the second repeater;
the Internet of things wireless access point receives the cache data of the first repeater sent by the second repeater;
the Internet of things wireless access point sends a mount removal instruction to the first repeater, and the mount removal instruction is used for indicating the first repeater to remove the mounted Internet of things terminal;
the wireless access point of the internet of things sends a second device mounting instruction to the second repeater, the second device mounting instruction comprises a device identifier of the terminal of the internet of things which is dismounted by the first repeater, the device identifier is used for the second repeater to mount the terminal of the internet of things which is dismounted by the first repeater, specifically, the terminal of the internet of things receives a network beacon sent by the second repeater, determines an idle network time slot of the network beacon, sends a frame to the second repeater in the idle network time slot, so that the second repeater determines the device identifier of the terminal of the internet of things according to the frame, and allocates a network number to the terminal of the internet of things when the device identifier is confirmed to be included in a device identifier set carried in the second device mounting instruction, and sends the network number to the terminal of the internet of things, and the terminal of the Internet of things determines the network time slot for sending the uplink data according to the network number.
2. The method of claim 1, further comprising:
when detecting that the uplink bandwidth of the second repeater is smaller than the uplink bandwidth of the third repeater, the internet of things wireless access point sends a second cache data migration instruction to the first repeater, wherein the second cache data migration instruction is used for indicating the first repeater to send cache data to the third repeater;
the Internet of things wireless access point receives the cache data of the first repeater sent by the third repeater;
the Internet of things wireless access point sends the mount release instruction to the first repeater;
the wireless access point of the internet of things sends a first device mounting instruction to the third repeater, the first device mounting instruction comprises a device identifier of the terminal of the internet of things which is dismounted by the first repeater, the device identifier is used for the third repeater to mount the terminal of the internet of things which is dismounted by the first repeater, specifically, the terminal of the internet of things receives a network beacon sent by the third repeater, determines an idle network time slot of the network beacon, sends a frame to the third repeater in the idle network time slot, so that the third repeater determines the device identifier of the terminal of the internet of things according to the frame, and allocates a network number to the terminal of the internet of things when the device identifier set carried in the first device mounting instruction comprises the device identifier, and sends the network number to the terminal of the internet of things, and the terminal of the Internet of things determines the network time slot for sending the uplink data according to the network number.
3. An Internet of things wireless access point is characterized by comprising a processing unit and a communication unit,
the processing unit is used for acquiring the uplink bandwidth of the second repeater and the uplink bandwidth of the third repeater through the communication unit when the state abnormality of the first repeater is detected; and when detecting that the uplink bandwidth of the second repeater is greater than or equal to the uplink bandwidth of the third repeater, sending a first cache data migration instruction to the first repeater through the communication unit, where the first cache data migration instruction is used to instruct the first repeater to send cache data to the second repeater, and to receive the cache data of the first repeater sent by the second repeater through the communication unit, and to send a mount release instruction to the first repeater through the communication unit, where the mount release instruction is used to instruct the first repeater to release a mounted internet of things terminal, and to send a second device mount instruction to the second repeater through the communication unit, where the second device mount instruction includes a device identifier of the internet of things terminal that the first repeater releases the mounted internet of things terminal, the device identifier is used for the second repeater to mount the first repeater-unmounted internet of things terminal, specifically, the terminal of the internet of things receives the network beacon sent by the second repeater through the communication unit, determines the idle network time slot of the network beacon, sending a frame to the second repeater through the communication unit in the free network slot, so that the second repeater determines the device identifier of the terminal of the internet of things according to the incoming frame, when the equipment identifier set carried in the second equipment mounting instruction is confirmed to comprise the equipment identifier, a network number is distributed to the terminal of the Internet of things, and sending the network number to the internet of things terminal through the communication unit, so that the internet of things terminal determines a network time slot for sending uplink data according to the network number.
4. The IOT wireless access point of claim 3, wherein the processing unit is further configured to send a second buffer data migration instruction to the first repeater through the communication unit when detecting that the uplink bandwidth of the second repeater is smaller than the uplink bandwidth of the third repeater, the second buffer data migration instruction being configured to instruct the first repeater to send buffer data to the third repeater and to receive, through the communication unit, the buffer data of the first repeater sent by the third repeater and to send the unlinking instruction to the first repeater through the communication unit and to send a first device onboarding instruction to the third repeater through the communication unit, the first device onboarding instruction including a device identifier of an IOT terminal unlinked by the first repeater, the device identifier is used for the third repeater to mount the internet of things terminal which is not mounted by the first repeater, specifically, the terminal of the internet of things receives the network beacon sent by the third repeater through the communication unit, determines the idle network time slot of the network beacon, sending a frame to the third repeater through the communication unit in the free network slot, so that the third repeater determines the device identifier of the internet of things terminal according to the incoming frame, when the equipment identifier set carried in the first equipment mounting instruction is confirmed to comprise the equipment identifier, a network number is distributed to the terminal of the Internet of things, and sending the network number to the internet of things terminal through the communication unit, so that the internet of things terminal determines a network time slot for sending uplink data according to the network number.
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