CN111372272A - Method and device for recovering abnormity of wireless bridging network - Google Patents
Method and device for recovering abnormity of wireless bridging network Download PDFInfo
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Abstract
The application provides an abnormal recovery method and device of a wireless bridging network, wherein the method comprises the following steps: associating two or more client devices with a wireless access point; detecting the communication quality state of the client equipment, and selecting main client equipment, candidate client equipment and other standby client equipment according to the communication quality state, wherein the communication link between the main client equipment and the wireless access point is a main link, and the communication link between the candidate client equipment and the wireless access point is a candidate link; and performing wireless communication service by adopting the main link, switching the communication link from the main link to the candidate link when the network abnormity of the main link is detected, and performing wireless communication service by adopting the candidate link. The method realizes the many-to-one or many-to-many wireless bridging redundancy technology between the client equipment and the wireless access point, can quickly switch the communication link, prevents data loss and provides a reliable wireless bridging communication link.
Description
Technical Field
The present application belongs to the field of network communication technologies, and in particular, to an anomaly recovery method and apparatus for a wireless bridge network, and further, to an electronic device and a storage medium for executing the anomaly recovery method for the wireless bridge network.
Background
As wireless technology develops and matures, more and more applications employ wireless to provide network services. However, in some specific scenarios such as wharfs, logistics, storage and factories, on the one hand, the requirement for data transmission reliability is harsh, and on the other hand, there may be factors such as electromagnetic interference or moving barriers that may cause communication interruption, which undoubtedly brings new challenges to wireless applications.
In order to improve the communication reliability of wireless bridging, the existing wireless redundancy scheme generally adopts an MESH network technology, a dual radio frequency redundancy technology and the like, but when the MESH network technology is adopted, only a single frequency band is shared, if the communication is interrupted due to wireless interference, the recovery cannot be carried out, the topology is complex, and the convergence and recovery time is long; when the multi-radio frequency redundancy technology is adopted, radio frequency resource waste is caused, and the opposite terminal switching equipment is required to support data packets to carry out duplicate removal operation.
Therefore, there is a need for an abnormal recovery method for a wireless bridge network that can avoid the technical problems of the above solutions.
Disclosure of Invention
In view of this, embodiments of the present application provide an abnormality recovery method and apparatus for a wireless bridge network, and further provide an electronic device and a storage medium for executing the abnormality recovery method for the wireless bridge network, which are intended to implement a many-to-one or many-to-many wireless bridge redundancy technique, and when an abnormal condition such as communication interruption or communication quality degradation occurs in a communication link, fast switching of the communication link can be implemented, a wireless communication service can be continuously provided, communication data loss is prevented, and a highly reliable wireless bridge communication link is provided.
A first aspect of an embodiment of the present application provides an anomaly recovery method for a wireless bridge network, where the anomaly recovery method for the wireless bridge network includes:
associating two or more client devices with a wireless access point;
detecting the communication quality state of the client equipment, and selecting main client equipment, candidate client equipment and other standby client equipment according to the communication quality state, wherein the communication link between the main client equipment and the wireless access point is a main link, and the communication link between the candidate client equipment and the wireless access point is a candidate link;
and performing wireless communication service by adopting the main link, switching the communication link from the main link to the candidate link when the network abnormity of the main link is detected, and performing wireless communication service by adopting the candidate link.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the detecting a communication quality state of the client device, and selecting a primary client device, a candidate client device, and other standby client devices according to the communication quality state, where a communication link between the primary client device and the wireless access point is a primary link, and a communication link between the candidate client device and the wireless access point is a candidate link includes:
combining client devices in the same wired local area network to generate a device list for network communication;
acquiring received signal strength parameters of all client devices in the device list;
and sequentially selecting main client equipment, candidate client equipment and other standby client equipment from large to small according to the received signal strength parameter.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, after the step of obtaining the received signal strength parameters of all the client devices in the device list, the method includes:
comparing MAC address sizes of two or more client devices having the greatest received signal strength values when the two or more client devices having the greatest received signal strength values are present in the device list;
and sequentially selecting main client equipment, candidate client equipment and other standby client equipment from large to small according to the MAC address of the client equipment.
With reference to the first aspect, in a third possible implementation manner of the first aspect, the associating two or more client devices with the wireless access point includes:
and establishing communication connection between the two or more client devices, and regularly receiving the current communication state information of the client devices according to a preset first time interval.
With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the detecting a communication quality state of the client device, and selecting a primary client device, a candidate client device, and other standby client devices according to the communication quality state, where a communication link between the primary client device and the wireless access point is a primary link, and a communication link between the candidate client device and the wireless access point is a candidate link, further includes:
and when the current communication state information sent by the main client device is not received within a preset second time interval, reselecting the main client device, the candidate client devices and other standby client devices to form a new main link, a new candidate link and other standby links.
With reference to the first aspect, in a fifth possible implementation manner of the first aspect, when it is detected that a network anomaly occurs in the main link, the step of switching a communication link from the main link to the candidate link and performing a wireless communication service by using the candidate link includes:
triggering the main client device to send a switching request message;
responding to the switching request message, triggering the candidate client-side equipment to feed back a switching reply message to the main client-side equipment;
when the host client device receives the switching reply message, the host client device is guided to interrupt an uplink interface at a virtual network bridge interface of the host client device, and a switching confirmation message is sent to the candidate client device;
and when the candidate client equipment receives the switching confirmation message, the candidate client equipment is guided to access an uplink interface in the virtual bridge interface of the candidate client equipment.
With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the step of receiving a handover request packet sent by the host client device includes:
monitoring whether the host client equipment receives a switching reply message within a preset third time interval;
and triggering the main client equipment to resend the switching request message when the main client equipment does not receive the switching reply message within a preset third time interval.
With reference to the first aspect, in a seventh possible implementation manner of the first aspect, after the step of switching a communication link from the main link to the candidate link and performing a wireless communication service by using the candidate link when the network anomaly of the wireless communication service is detected, the method further includes:
comparing the received signal strength parameters of all host client devices when the wireless communication service is in a loop abnormal state;
and selecting the client equipment corresponding to the maximum received signal strength parameter according to the size of the received signal strength parameter and keeping the client equipment as the main client equipment.
With reference to the first aspect, in an eighth possible implementation manner of the first aspect, the host client device identifies and updates a two-layer address table for forwarding data when performing a wireless communication service.
A second aspect of the embodiments of the present application provides an abnormality recovery apparatus for a wireless bridged network, where the abnormality recovery apparatus for a wireless bridged network includes:
an association module for associating two or more client devices with a wireless access point;
the election module is used for detecting the communication quality state of the client equipment and electing a main client, a candidate client and other standby clients according to the communication quality state, wherein a communication link between the main client and the wireless access point is a main link, and a communication link between the candidate client and the wireless access point is a candidate link;
and the switching module is used for carrying out wireless communication service by adopting the main link, switching the communication link from the main link to the candidate link when detecting that the network abnormality occurs in the main link, and carrying out wireless communication service by adopting the candidate link.
A third aspect of embodiments of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method for recovering an anomaly of a wireless bridged network according to any one of the first aspect when executing the computer program.
A fourth aspect of the embodiments of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program, when executed by a processor, implements the steps of the method for recovering an anomaly of a wireless bridged network according to any one of the first aspect.
Compared with the prior art, the embodiment of the application has the advantages that:
according to the method and the device, two or more client devices are associated with the wireless access point, the communication quality state of the client devices is detected, the main client device, the candidate client devices and other standby client devices are selected according to the communication quality state, various communication links including a main link, a candidate link and other standby links are formed, and redundant backup of wireless bridging and communication link selection are achieved. The main link is adopted for wireless communication service, when the wireless communication service is detected to have network abnormality, the communication link is switched from the main link to the candidate link, and the candidate link is adopted for executing the wireless communication service, so that the communication link can be quickly switched under the condition of network abnormality, data loss is prevented, and a highly reliable wireless bridging communication link is provided.
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In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flowchart of a basic method for recovering an anomaly of a wireless bridged network according to an embodiment of the present disclosure;
fig. 2 is a redundant topology diagram of a wireless bridge network in an exception recovery method for a wireless bridge network according to an embodiment of the present application;
fig. 3 is a schematic flowchart illustrating a method for electing a primary client device, a candidate client device, and other standby client devices in the method for recovering from an anomaly of a wireless bridged network according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart illustrating another method for electing a primary client device, a candidate client device, and other standby client devices in the method for recovering from an anomaly of a wireless bridged network according to the embodiment of the present application;
fig. 5 is a flowchart illustrating a method for performing communication link handover in an abnormal recovery method of a wireless bridging network according to an embodiment of the present application;
fig. 6 is a redundant topology diagram of an initial state of a wireless bridge network in the method for recovering an anomaly of the wireless bridge network according to the embodiment of the present application;
fig. 7 is a schematic diagram of a link handover in an abnormal recovery method for a wireless bridging network according to an embodiment of the present application;
fig. 8 is a schematic flowchart of a method for triggering the host client device to send a handover request packet in the method for recovering an anomaly of a wireless bridge network according to the embodiment of the present application;
fig. 9 is a flowchart illustrating a method for solving a loop anomaly problem in an anomaly recovery method for a wireless bridging network according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of an anomaly recovery apparatus of a wireless bridged network according to an embodiment of the present application;
fig. 11 is a schematic view of an electronic device for implementing an exception recovery method for a wireless bridged network according to an embodiment of the present disclosure.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
In order to explain the technical solution described in the present application, the following description will be given by way of specific examples.
The method for recovering the abnormity of the wireless bridging network aims to realize many-to-one or many-to-many wireless bridging redundancy technology between the client equipment and the wireless access point by associating two or more client equipment with the redundant function and the wireless access point and setting a main link, a candidate link and other standby links for communication according to the communication quality, so that the communication link can be selected, the communication link is rapidly switched under the abnormal condition of the network, the data loss is prevented, and the highly reliable wireless bridging communication link is provided.
In some embodiments of the present application, please refer to fig. 1, and fig. 1 is a flowchart illustrating a basic method for recovering an exception of a wireless bridge network according to an embodiment of the present application. The details are as follows:
in step S101, two or more client devices are associated with a wireless access point.
In this embodiment, the client device is a client device with a wireless redundancy function, and is a wireless terminal access device (CPE) for receiving a wifi signal. The wireless access point is the most commonly used device AP (access point) when the small wireless local area network is established, the AP is equivalent to a bridge which is connected with a network and a wireless network, and all wireless network clients can be connected together. In this embodiment, by associating two or more client devices with a wireless access point, at this time, the client devices associated with the wireless access point are all in a standby state, and an uplink interface of the client devices is not connected to a virtual bridge interface (bridge) of the client devices. It should be understood that, referring to fig. 2 together, fig. 2 is a redundant topology diagram of a wireless bridge network in the method for recovering an anomaly of the wireless bridge network according to the embodiment of the present application. As shown in fig. 2, the wireless access points may be configured as one or multiple ones, and the client devices may be respectively associated with different wireless access points, so as to implement a many-to-one or many-to-many wireless bridging redundancy technique between the client devices and the wireless access points.
In step S102, a communication quality status of the client device is detected, and a primary client device, a candidate client device, and other standby client devices are selected according to the communication quality status, where a communication link between the primary client device and the wireless access point is a primary link, and a communication link between the candidate client device and the wireless access point is a candidate link.
In this embodiment, the client devices are all associated with the wireless access point, and after the client devices are in the standby state, the communication quality states of the client devices, including parameters such as received signal strength, signal-to-noise ratio, and load, are detected. Then, according to the communication quality state of the client device, a main client device, a candidate client device and other client devices are selected according to the communication quality, so that different client devices are provided for wireless communication service to establish different communication links, wherein the communication links comprise the main link, the candidate link and other standby links.
In step S103, the main link is used for performing a wireless communication service, and when it is detected that a network anomaly occurs in the main link, the communication link is switched from the main link to the candidate link, and the candidate link is used for performing a wireless communication service.
When wireless communication service is carried out, the uplink interface of the host client equipment is accessed into the virtual bridge interface of the host client equipment, so that the host client equipment can forward the communication data to the wireless access point. And the candidate client device and other standby client devices are still in a standby state, that is, the uplink interfaces of the candidate client device and other standby client devices are not accessed into the virtual bridge interfaces of the candidate client device and other standby client devices, and cannot forward data to the associated wireless access point. In this embodiment, by detecting whether an abnormal condition such as a link failure or low communication quality occurs in the main link network during the wireless communication service, the criterion of low communication quality can be determined by setting a threshold. When the main link network is detected to be abnormal, the wireless access point switches the communication link from the main link to the candidate link, the uplink interface of the main client device is disconnected from the virtual bridge interface of the wireless access point, the uplink interface of the candidate client device is connected into the virtual bridge interface of the wireless access point, the switching of the communication link is achieved, the candidate link is used as a new main link to carry out wireless communication service, and data forwarding operation is carried out, so that the wireless communication service is recovered.
In the method for recovering an anomaly of a wireless bridge network provided in the above embodiment, two or more client devices are associated with a wireless access point, a communication quality state of the client device is detected, a main client device, a candidate client device, and other standby client devices are selected according to the communication quality state, and a plurality of communication links including a main link, a candidate link, and other standby links are formed, so that redundant backup of wireless bridge and communication link selection are realized. The main link is adopted for wireless communication service, and when the wireless communication service is detected to have network abnormality, the communication link is switched from the main link to the candidate link, so that the communication link can be quickly switched under the condition of network abnormality, data loss is prevented, and a highly reliable wireless bridging communication link is provided.
In some embodiments of the present application, please refer to fig. 3, and fig. 3 is a flowchart illustrating a method for selecting a primary client device, a candidate client device, and other standby client devices in an anomaly recovery method for a wireless bridged network according to an embodiment of the present application. The details are as follows:
in step S301, client devices in the same wired lan are combined to generate a device list usable for network communication;
in step S302, obtaining received signal strength parameters of all client devices in the device list;
in step S303, a main client device, a candidate client device, and other standby client devices are sequentially selected according to the received signal strength parameter from high to low.
In this embodiment, in the same wired lan, the client device and the client device communicate with each other through a private protocol. Specifically, when a client device is powered on, it enters a detectable state (DISC state), and the client device may communicate with other client devices in the same wired lan through a wired interface using a private protocol. In this embodiment, client devices within the same wired lan may be combined to generate a list of devices that may be used for network communications. At this time, the client devices in the same device list may be configured as redundant devices of each other.
In this embodiment, the client devices belonging to the same device list are subjected to communication quality state detection one by one, and receive signal strength parameters of all the client devices in the device list, that is, the signal strength received by the client device and sent by the access point associated with the client device, are obtained. By comparing the magnitude relation of the received signal strength of each client device, the main client device, the candidate client devices and other standby client devices are sequentially selected from large to small according to the received signal strength parameters, and accordingly a main link, a candidate link and other standby links are formed. Furthermore, in this embodiment, at least one host client device and one candidate client device are provided, that is, at least one host link and one candidate link are formed. Of course, in this embodiment, one or more other standby devices may be further provided to form one or more other standby links. For example, the device list includes A, B, C, D four client devices, and the magnitude relation of the received signal strengths of the four client devices is obtained through comparison, that is, B > C > a > D, at this time, according to the received signal strength parameter, the client device B is selected as a main client device, and a communication link formed by the client device B and the wireless access point is a main link; electing client equipment C as candidate client equipment, wherein a communication link formed by the client equipment C and the wireless access point is a candidate link; and D, electing the client devices A and D as other standby client devices, wherein the communication links formed by the client devices A and D and the wireless access point are other standby links.
In this embodiment, the elected host client device switches from the DISC state to a use state (MASTER state), and accesses the uplink interface of the client device in this state to its own virtual bridge interface to start to undertake a data forwarding function; the elected CANDIDATE client equipment is switched to a CANDIDATE state (CANDIDATE state) from the DISC state, and when the client equipment in the state is abnormal in the wireless communication service process, the switched equipment is considered firstly; and switching the elected other standby client equipment from the DISC state to a standby state (BACKUP state), wherein the client equipment in the state is equipment listed in a switching consideration range when an abnormal condition occurs in the wireless communication service process.
In some embodiments of the present application, please refer to fig. 4, where fig. 4 is a schematic flowchart illustrating another method for selecting a primary client device, a candidate client device, and other standby client devices in an anomaly recovery method for a wireless bridged network according to an embodiment of the present application. The details are as follows:
in step S401, when two or more client devices with the maximum received signal strength values exist in the device list, comparing MAC address sizes of the two or more client devices with the maximum received signal strength values;
in step S402, a primary client device, a candidate client device, and other standby client devices are sequentially selected from the largest MAC address to the smallest MAC address of the client device.
In this embodiment, for a situation that the received signal strength values of the client devices in the device list may be the same, after the received signal strength parameters of all the client devices in the device list are obtained, if two or more client devices having the largest received signal strength values exist, further, the MAC address size relationship of the client devices is obtained by comparing the MAC addresses of the two or more client devices having the largest received signal strength values, and then, a main client device, a candidate client device, and other standby client devices are sequentially selected according to the MAC addresses of the client devices from large to small. For example, A, B, C, D four client devices are included in the device list, and the magnitude relation of the received signal strengths of the four client devices is obtained through comparison, where B ═ C > a > D, then the MAC address magnitudes are compared in the client devices B and C, and if the MAC address magnitude relation of the client devices B and C is B > C, then the client device B is elected as a master client device, and the communication link formed by the client device B and the wireless access point is a master link; and electing the client device C as a candidate client device, wherein a communication link formed by the client device C and the wireless access point is a candidate link. Otherwise, electing the client equipment C as main client equipment, wherein a communication link formed by the client equipment C and the wireless access point is a main link; and electing the client device B as a candidate client device, electing a communication link formed by the client device B and the wireless access point as a candidate link, electing the client device A and the client device D as other standby client devices, and electing the communication links formed by the client devices A and D and the wireless access point as other standby links. It is understood that, when there are three or more client devices having the same maximum rssi value, after the selection of the master client device, the client device with the largest MAC address is selected from the remaining client devices having the same maximum rssi value and selected as the candidate client device, and the other client devices are selected as the standby devices.
In some embodiments of the present application, when performing a wireless communication service, a communication connection between a primary client device, a candidate client device, and other standby client devices is established through a private protocol, and the client devices are enabled to periodically send their own current communication state information according to a preset first time interval in their lifecycle. Therefore, the current communication state information of the client device can be received at regular time according to the preset first time interval. According to the current communication state information of the client device, the client device in the current use state of the wireless communication service and all the redundant devices in the standby state can know the communication state information of each other. The current communication state information of the client device includes a self state (such as a MASTER state, a CANDIDATE state, or a BACKUP state) of the client device, a two-layer address table, an uplink interface received signal strength, and the like.
Further, in this embodiment, a second time interval may also be preset, after establishing communication connection between the client devices and receiving the current communication state information of the client devices according to a preset notification rule, it is monitored whether the current communication state information sent by the host client device is received within the preset second time interval, and when the current communication state information sent by the host client device is not received within the preset time interval, the communication quality states of all the client devices in the wireless communication service are re-detected, and the host client device, the candidate client devices, and other standby client devices are reselected to form a new host link, a new candidate link, and other standby links. Therefore, the situation that the master device cannot inform the link state of the master device in time due to the fault of the wired local area network, and the network abnormity cannot be recovered is prevented.
In some embodiments of the present application, please refer to fig. 5, fig. 6 and fig. 7 together, fig. 5 is a schematic flowchart of a method for performing communication link handover in an abnormal recovery method of a wireless bridge network according to an embodiment of the present application; fig. 6 is a redundant topology diagram of an initial state of a wireless bridge network in the method for recovering an anomaly of the wireless bridge network according to the embodiment of the present application; fig. 7 is a schematic diagram of link switching in an exception recovery method for a wireless bridging network according to an embodiment of the present application. As shown, the detailed steps are as follows:
in step S501, the host client device is triggered to send a handover request message;
in step S502, in response to the handover request message, triggering the candidate client device to feed back a handover reply message to the host client device;
in step S503, when the host client device receives the switching reply message, instructing the host client device to disconnect an upstream interface at its own virtual bridge interface, and sending a switching confirmation message to the candidate client device;
in step S504, when the candidate client device receives the switching confirmation packet, the candidate client device is instructed to access an uplink interface in its own virtual bridge interface.
In this embodiment, as shown in fig. 6 and 7, Br (virtual bridge interface) and wdscl (upstream interface) represent interface connections inside the client device, and the whole structure can be regarded as the client device. The link switching is to break the original connection between Br and wdscli and establish a new connection between Br and wdscli. In the operation process of the wireless communication service, when a link disconnection fault occurs in a main link or a received signal strength parameter is reduced to a certain preset threshold value, the main link of the wireless communication service is abnormal, and when the main link of the wireless communication service is detected to be abnormal, an abnormal recovery mechanism of a wireless bridge network is triggered. Namely, the main client device is triggered to send a switching request message (REQ) through a wired interface to notify so as to realize communication link switching. The specific communication link switching process is as follows: after receiving a handover request message sent by the primary client device, triggering candidate client devices in the same wired local area network to feed back a handover reply message (RSP) to the primary client device in response to the handover request message, and keeping other standby client devices silent. Further, when the host client device receives the switching reply message, the host client device executes the following switching operation: disconnecting the upstream interface at the own virtual bridge interface; sending a handover CONFIRM message (CONFIRM) to the candidate client device; switching its own MASTER state to BACKUP state. When the candidate client device receives the switching confirmation message, the candidate client device is enabled to execute the following switching operation: switching its own CANDIDATE state to MASTER state; accessing an uplink interface in a virtual bridge interface of the self; and broadcasting the two-layer address table to all interfaces by sending a GARP/NA message so as to update the address table of the switching equipment in the wired local area network. At this time, switching of the communication link from the main link to the candidate link is completed, so that the candidate link becomes a new main link and starts to assume a data forwarding function.
In the link switching process, there may be a case where the switching confirmation packet is lost, and at this time, the uplink interface of the original host client device has been disconnected from its own virtual bridge interface and switched to the BACKUP state. And the CANDIDATE client device does not receive the confirmation message, that is, the uplink interface of the CANDIDATE client device is not accessed into the virtual bridge interface of the CANDIDATE client device and is in the CANDIDATE state. I.e., no client device is currently in the MASTER state to assume data forwarding functions for the wireless communication service. In this embodiment, for this situation, whether the client device in the same wired lan receives the current communication state information of the client device in the MASTER state within a preset fourth time interval may be monitored, and if not, the client device in the communication link that is used to form the main link, the candidate link, and the other standby links may be reselected.
In some embodiments of the present application, please refer to fig. 8, where fig. 8 is a flowchart illustrating a method for triggering the host client device to send a handover request message in the method for recovering an anomaly of a wireless bridged network according to the embodiment of the present application. The details are as follows:
in step S801, monitoring whether the host client device receives a handover reply message within a preset third time interval;
in step S802, when the host client device does not receive the handover reply message within the preset third time interval, the host client device is triggered to resend the handover request message.
In this embodiment, in a case that a handover request packet sent by the host client device may be lost, for such a case, by setting a preset third time interval, and by monitoring whether the host client device receives a handover reply packet fed back by the candidate link within the preset third time interval, if the handover reply packet is not received, it is determined that the handover request packet is lost, and the link handover is abnormal. And triggering the main client device to resend the switching request message until the main client device receives a switching reply message fed back by the candidate link. Further, in some embodiments of the present application, if the handover reply message is lost, the feedback may be performed again through a handover request message that is retransmitted based on the host client device.
In some embodiments of the present application, please refer to fig. 9, and fig. 9 is a flowchart illustrating a method for solving a loop anomaly problem in an anomaly recovery method for a wireless bridging network according to an embodiment of the present application. The details are as follows:
in step S901, comparing the received signal strength parameters of the host client device when the wireless communication service is in a loop abnormal state;
in step S902, the client device corresponding to the maximum rssi parameter is selected according to the rssi parameter and remains as the master client device.
In this embodiment, in the process of detecting that the wireless communication service has a network anomaly and switching the communication link, the communication link switching mechanism may be triggered because the host client device only has a short network interruption, and after a new host client device is elected through the communication link switching, the original host client device recovers network communication through the wired port at this time. Under the scene, two main client devices appear in the same wired local area network to form two main links, so that the problem of abnormal network loops is caused. In order to avoid the problem of loop anomaly, in this embodiment, when one host client device receives current communication state information from other host client devices, it is determined that the wireless communication service is in an anomalous loop state, at this time, a received signal strength parameter of each host client device is obtained, and the received signal strength parameters of the host client devices are compared with each other, where the obtained received signal strength parameter is a received signal strength parameter of an uplink of the client device. And then, selecting the client device corresponding to the maximum received signal strength parameter according to the size of the received signal strength parameter to be kept as the main client device, and if more than two client devices with the maximum received signal strength are obtained through mutual comparison, further comparing the MAC address size of the client device, keeping the client device with the maximum MAC address as the main client device, and degenerating the rest client devices into standby devices, thereby solving the problem of loop abnormality.
In some embodiments of the present application, after the link is switched, the port of the wired lan switch device through which the effective link forwarding path passes changes, but the switch device does not immediately sense the change, and may still forward data from the port of the original old link where the host client device is located, which may cause the communication link to be interrupted. In order to avoid such interruption and accelerate the radio link failure switching time, the primary client device may further identify and update the layer two address of the forwarded data when performing the radio communication service. Specifically, while the host client device undertakes the function of forwarding data, address information of all data flowing through the host link is recorded, and the address information is updated to all other devices in a notification message manner. When the link is switched, the new host client device broadcasts the learned address list on all interfaces of the wireless communication service through the GARP/NA message immediately to update the address list of the switching device in the wired lan.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
In some embodiments of the present application, please refer to fig. 10, where fig. 10 is a schematic structural diagram of an abnormality recovery apparatus of a wireless bridge network according to an embodiment of the present application, which is detailed as follows:
in this embodiment, the apparatus for recovering an anomaly of a wireless bridge network includes: an association module 1001, an election module 1002, and a switching module 1003. Wherein the association module 1001 is configured to associate two or more client devices with a wireless access point; the election module 1002 is configured to detect a communication quality state of the client device, and elect a main client, a candidate client, and other standby clients according to the communication quality state, where a communication link between the main client and the wireless access point is a main link, and a communication link between the candidate client and the wireless access point is a candidate link; the switching module 1003 is configured to perform a wireless communication service by using the main link, switch a communication link from the main link to the candidate link when detecting that a network anomaly occurs in the main link, and perform a wireless communication service by using the candidate link.
The abnormality recovery apparatus of the wireless bridge network corresponds to the abnormality recovery method of the wireless bridge network one to one, and is not described herein again.
In some embodiments of the present application, please refer to fig. 11, where fig. 11 is a schematic diagram of an electronic device implementing an exception recovery method for a wireless bridge network according to an embodiment of the present application. As shown in fig. 11, the electronic apparatus 11 of this embodiment includes: a processor 1101, a memory 1102 and a computer program 1103 stored in said memory 1102 and operable on said processor 1101, such as an exception recovery program for a wireless bridge network. The processor 1101 implements the steps in the above-described embodiments of the method for recovering an anomaly of a wireless bridge network when executing the computer program 1102. Alternatively, the processor 1101 implements the functions of each module/unit in each device embodiment described above when executing the computer program 1103.
Illustratively, the computer program 1103 may be partitioned into one or more modules/units that are stored in the memory 1102 and executed by the processor 1101 to complete the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 1103 in the electronic device 11. For example, the computer program 1103 may be divided into:
an association module for associating two or more client devices with a wireless access point;
the election module is used for detecting the communication quality state of the client equipment and electing a main client, a candidate client and other standby clients according to the communication quality state, wherein a communication link between the main client and the wireless access point is a main link, and a communication link between the candidate client and the wireless access point is a candidate link;
and the switching module is used for carrying out wireless communication service by adopting the main link, switching the communication link from the main link to the candidate link when detecting that the network abnormality occurs in the main link, and carrying out wireless communication service by adopting the candidate link.
The electronic device may include, but is not limited to, a processor 1101, a memory 1102. Those skilled in the art will appreciate that fig. 11 is merely an example of an electronic device 11 and does not constitute a limitation of electronic device 11 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the electronic device may also include input-output devices, network access devices, buses, etc.
The Processor 1101 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 1102 may be an internal storage unit of the electronic device 11, such as a hard disk or a memory of the electronic device 11. The memory 1102 may also be an external storage device of the electronic device 11, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, provided on the electronic device 11. Further, the memory 1102 may also include both an internal storage unit and an external storage device of the electronic device 11. The memory 1102 is used for storing the computer programs and other programs and data required by the electronic device. The memory 1102 may also be used to temporarily store data that has been output or is to be output.
It should be noted that, for the information interaction, execution process, and other contents between the above-mentioned devices/units, the specific functions and technical effects thereof are based on the same concept as those of the embodiment of the method of the present application, and specific reference may be made to the part of the embodiment of the method, which is not described herein again.
The embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps in the above-mentioned method embodiments.
The embodiments of the present application provide a computer program product, which when running on a mobile terminal, enables the mobile terminal to implement the steps in the above method embodiments when executed.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. . Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical 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.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (12)
1. An anomaly recovery method for a wireless bridged network, comprising:
associating two or more client devices with a wireless access point;
detecting the communication quality state of the client equipment, and selecting main client equipment, candidate client equipment and other standby client equipment according to the communication quality state, wherein the communication link between the main client equipment and the wireless access point is a main link, and the communication link between the candidate client equipment and the wireless access point is a candidate link;
and performing wireless communication service by adopting the main link, switching the communication link from the main link to the candidate link when the network abnormity of the main link is detected, and performing wireless communication service by adopting the candidate link.
2. The method of claim 1, wherein the detecting the communication quality status of the client device and selecting the master client device, the candidate client devices and other standby client devices according to the communication quality status comprises:
combining client devices in the same wired local area network to generate a device list for network communication;
acquiring received signal strength parameters of all client devices in the device list;
and sequentially selecting main client equipment, candidate client equipment and other standby client equipment from large to small according to the received signal strength parameter.
3. The method of claim 2, wherein the step of obtaining the received signal strength parameters of all client devices in the device list comprises:
comparing MAC address sizes of two or more client devices having the greatest received signal strength values when the two or more client devices having the greatest received signal strength values are present in the device list;
and sequentially selecting main client equipment, candidate client equipment and other standby client equipment from large to small according to the MAC address of the client equipment.
4. The method of claim 1, wherein the step of associating the two or more client devices with the wireless access point comprises:
and establishing communication connection between the two or more client devices, and regularly receiving the current communication state information of the client devices according to a preset first time interval.
5. The method of claim 4, wherein the step of detecting the communication quality status of the client device and selecting the primary client device, the candidate client device and other standby client devices according to the communication quality status further comprises, after the step of selecting the primary client device and the candidate client device as the primary link and the candidate client device as the candidate link:
and when the current communication state information sent by the main client device is not received within a preset second time interval, reselecting the main client device, the candidate client devices and other standby client devices to form a new main link, a new candidate link and other standby links.
6. The method according to claim 1, wherein the step of switching the communication link from the main link to the candidate link and performing the wireless communication service using the candidate link when the network anomaly of the main link is detected comprises:
triggering the main client device to send a switching request message;
responding to the switching request message, triggering the candidate client-side equipment to feed back a switching reply message to the main client-side equipment;
when the host client device receives the switching reply message, the host client device is guided to interrupt an uplink interface at a virtual network bridge interface of the host client device, and a switching confirmation message is sent to the candidate client device;
and when the candidate client equipment receives the switching confirmation message, the candidate client equipment is guided to access an uplink interface in the virtual bridge interface of the candidate client equipment.
7. The method according to claim 6, wherein the step of receiving the handover request packet sent by the host client device comprises:
monitoring whether the host client equipment receives a switching reply message within a preset third time interval;
and triggering the main client equipment to resend the switching request message when the main client equipment does not receive the switching reply message within a preset third time interval.
8. The method according to claim 1, wherein after the steps of switching the communication link from the main link to the candidate link and performing the wireless communication service using the candidate link when detecting that the wireless communication service has a network abnormality, the method further comprises:
comparing the received signal strength parameters of all host client devices when the wireless communication service is in a loop abnormal state;
and selecting the client equipment corresponding to the maximum received signal strength parameter according to the size of the received signal strength parameter and keeping the client equipment as the main client equipment.
9. The method for recovering from an abnormality of a wireless bridged network according to claim 1, further comprising: and the host client equipment identifies and updates the two-layer address table of the forwarding data when the wireless communication service is carried out.
10. An abnormality recovery apparatus for a wireless bridged network, the apparatus comprising:
an association module for associating two or more client devices with a wireless access point;
the election module is used for detecting the communication quality state of the client equipment and electing a main client, a candidate client and other standby clients according to the communication quality state, wherein a communication link between the main client and the wireless access point is a main link, and a communication link between the candidate client and the wireless access point is a candidate link;
and the switching module is used for carrying out wireless communication service by adopting the main link, switching the communication link from the main link to the candidate link when detecting that the network abnormality occurs in the main link, and carrying out wireless communication service by adopting the candidate link.
11. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for recovering an anomaly of a wireless bridged network according to any one of claims 1 to 9 when executing the computer program.
12. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, implements the steps of the method for recovering an anomaly of a wireless bridged network according to any one of claims 1 to 9.
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