CN113766596A - Wireless network ad hoc network method and system - Google Patents
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Abstract
The application discloses a wireless network ad hoc network method and a system, wherein the method comprises the following steps: the method comprises the steps that a central node sends a beacon frame for networking, wherein the beacon frame is used for being forwarded by terminal nodes of the whole network; the central node collects field intensity information of the terminal nodes after the terminal nodes finish the forwarding of the beacon frames; and the central node configures the terminal nodes managed by the central node according to the collected field intensity information of the terminal nodes, and converts the terminal nodes into an on-network working state. The method and the device solve the problems that manual intervention is needed in the current networking process and the communication success rate of the data information cannot be guaranteed, so that convenience and easiness in networking are provided.
Description
Technical Field
The present application relates to the field of communications, and in particular, to a method and system for wireless network ad hoc networking.
Background
At present, in the field of data transmission of the application of the internet of things such as electric meters, water meters and gas meters centralized acquisition, industrial wireless data acquisition, environment monitoring, logistics storage and the like, the problems of poor penetration performance, more same-frequency interference equipment, higher requirement on network layout, relatively complex protocol and the like exist on site, the limitation of line-of-sight transmission exists, manual intervention is needed in the networking process, and the communication success rate of data information cannot be guaranteed.
Disclosure of Invention
The embodiment of the application provides a wireless network ad hoc network method and a wireless network ad hoc network system, which at least solve the problems that manual intervention is needed in the current networking process and the communication success rate of data information cannot be guaranteed.
According to an aspect of the present application, there is provided a wireless network ad hoc network method, including: the method comprises the steps that a central node sends a beacon frame for networking, wherein the beacon frame is used for being forwarded by terminal nodes of the whole network; the central node collects field intensity information of the terminal nodes after the terminal nodes finish the forwarding of the beacon frames; and the central node configures the terminal nodes managed by the central node according to the collected field intensity information of the terminal nodes, and converts the terminal nodes into an on-network working state.
Further, after the central node transmits a beacon frame for networking, the method further includes: the terminal node scans a specified channel group, if the beacon frame is received, the address of the terminal node sending the beacon frame is added into a neighbor table of the terminal node, and the field intensity information of the received beacon frame is recorded; and the terminal node judges whether to forward the beacon frame according to the beacon frame.
Further, the collecting, by the central node, the field strength information of the terminal node includes: the central node sends a field intensity collection request to the terminal node, wherein the field intensity collection request is used for indicating a request to collect field intensity information; and the central node receives a field intensity collection response of the terminal node, wherein the field intensity collection response is used for indicating the field intensity information provided by the terminal node.
Further, the central node configures a terminal node managed by the central node, and converting the terminal node into an on-network operating state includes: the central node sends a terminal node configuration request command to a terminal node managed by the central node, wherein the terminal node configuration request command is used for indicating that the terminal node is requested to be configured for network access work; and the central node receives a configuration terminal node response command from the terminal node, wherein the configuration terminal node response command is used for indicating the terminal node to respond to the configuration terminal node request command.
Further, the central node configures the terminal nodes managed by the central node according to the collected field intensity information of the terminal nodes, and after the terminal nodes are converted into the on-grid operating state, the method further includes: the newly-added terminal node sends a network access application command to the terminal node on the network, wherein the network access application command is used for indicating the newly-added terminal node to request network access; the newly added terminal node receives a network access application frame response frame from the terminal node on the network, wherein the network access application frame response frame carries information for indicating network access; and the newly added terminal node accesses the network according to the information.
According to another aspect of the present application, there is also provided a wireless network ad hoc network system, including a central node, the central node including: the first sending module is used for sending a beacon frame for networking, wherein the beacon frame is used for forwarding terminal nodes of the whole network; the collection module is used for collecting the field intensity information of the terminal node after the terminal node completes the forwarding of the beacon frame; and the configuration module is used for configuring the terminal nodes managed by the central node according to the field intensity information of the terminal nodes collected by the collection module and converting the terminal nodes into an on-network working state.
Further, the system further comprises the terminal node, the terminal node comprising: the processing module is used for scanning a specified channel group, adding the address of the terminal node which sends the beacon frame into a neighbor table of the processing module if the beacon frame is received, and recording the field intensity information of the received beacon frame; and the judging module is used for judging whether to forward the beacon frame according to the beacon frame.
Further, the first sending module is further configured to send a field intensity collection request to the terminal node, where the field intensity collection request is used to indicate a request for collecting field intensity information; the central node further comprises a first receiving module for receiving a field intensity collecting response of the terminal node, wherein the field intensity collecting response is used for indicating the field intensity information provided by the terminal node.
Further, the first sending module is further configured to send a terminal node configuration request command to a terminal node managed by the central node, where the terminal node configuration request command is used to indicate a request for configuring a terminal node for network access work; the first receiving module is further configured to receive a configuration terminal node response command from the terminal node, where the configuration terminal node response command is used to instruct the terminal node to respond to the configuration terminal node request command.
Further, the terminal node further includes: a second sending module, configured to send a network access application command to a terminal node on the network when the terminal node is not networked, where the network access application command is used to indicate that the newly added terminal node requests network access; a second receiving module, configured to receive a network access application frame response frame from the terminal node on the network when the terminal node is not networked, where the network access application frame response frame carries information for indicating network access; and the network access module is used for accessing the network by the newly added terminal node according to the information.
In the embodiment of the application, a central node is adopted to send a beacon frame for networking, wherein the beacon frame is used for forwarding terminal nodes of the whole network; the central node collects field intensity information of the terminal nodes after the terminal nodes finish the forwarding of the beacon frames; and the central node configures the terminal nodes managed by the central node according to the collected field intensity information of the terminal nodes, and converts the terminal nodes into an on-network working state. The method and the device solve the problems that manual intervention is needed in the current networking process and the communication success rate of the data information cannot be guaranteed, so that convenience and easiness in networking are provided.
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The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 is a schematic diagram of a wireless sensor network system composition according to an embodiment of the present application;
fig. 2 is a flow chart of a wireless network ad hoc networking method according to an embodiment of the present application;
figure 3 is a flow diagram of a wireless ad hoc network according to an embodiment of the present application;
FIG. 4 is a flow chart of a newly added terminal (routing) node network according to an embodiment of the present application; and
fig. 5 is a schematic diagram of a wireless node network protocol stack according to an embodiment of the application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
In the embodiment of the invention, the MESH network topology has strong functions, the network can carry out networking communication in a multi-hop mode, and the MESH network topology also has self-organizing and self-healing functions.
Fig. 1 is a schematic diagram of a wireless sensor network system according to an embodiment of the present application, and as shown in fig. 1, a network node of a MESH network includes:
a central node: the network information is all contained, and is the most complex one of 3 types of equipment, the storage capacity is the largest, and the computing capability is the strongest. Sending network beacons, establishing a network, managing network nodes, storing network node information, finding routing information between a pair of nodes, and continuously receiving information.
The routing node: and the network coordinator is used for forming a network and connecting other routing nodes or terminal nodes. The routing node has the routing function and can provide bidirectional information transmission. The greater storage and computing power may make it function as a network router when idle, as well as being an end node.
A terminal node: the end node can only transmit information to or receive information from the routing node. Have limited functionality to control cost and complexity and are commonly used as terminal devices in networks.
In the embodiment of the application, a networking method suitable for a wireless sensor network with relatively fixed node positions and carrying out periodic data transmission is provided.
Fig. 2 is a flowchart of a wireless network ad hoc network method according to an embodiment of the present application, as shown in fig. 2, the method includes the following steps:
step S202, a central node sends a beacon frame for networking, wherein the beacon frame is used for forwarding terminal nodes of the whole network;
step S204, the central node collects the field intensity information of the terminal node after the terminal node completes the forwarding of the beacon frame;
the field intensity of the environment where the chip is located is tested in the communication chip and is stored in a register of the chip. In this embodiment, the field strength of the environment of the chip can be known by reading the register in the chip. The field strength can be understood as the strength of the signal tested by the chip.
Step S206, the central node configures the terminal nodes managed by the central node according to the collected field intensity information of the terminal nodes, and the terminal nodes are converted into an on-line working state.
By the embodiment, the problems that manual intervention is needed in the current networking process and the communication success rate of the data information cannot be guaranteed are solved, so that convenience and easiness in networking are provided.
Preferably, after step S202, the method further comprises: the terminal node scans a specified channel group, if the beacon frame is received, the address of the terminal node sending the beacon frame is added into a neighbor table of the terminal node, and the field intensity information of the received beacon frame is recorded; and the terminal node judges whether to forward the beacon frame according to the beacon frame.
In an optional implementation manner, the determining, by the terminal node, whether to forward the beacon frame according to the beacon frame includes: the terminal node checks the beacon identification byte in the beacon frame and judges whether the terminal node forwards the beacon frame of the networking; and if the judgment result is negative, the terminal node constructs the self beacon frame load information and sends the beacon frame when the layer number and the turn number accord with the preset conditions.
As a preferred embodiment, when the number of layers and the number of turns meet a predetermined condition, the sending the beacon frame by the terminal node includes: the terminal node judges whether the layer number and the turn number are larger than the maximum value or not; and if the judgment result shows that the number of layers and the number of turns are not more than the maximum value, the terminal node calls the beacon sending service of the MAC layer to send out the beacon frame in the appointed time slot or number of turns.
Optionally, after step S202, the method further comprises: the central node monitors the local channel group and the special networking channel; and if the central node receives the beacon frame forwarded by the terminal node, the central node adds the information of the transmission source node into a neighbor table and records the received field intensity information.
Preferably, in step S204, the collecting, by the central node, the field strength information of the terminal node includes: the central node sends a field intensity collection request to the terminal node, wherein the field intensity collection request is used for indicating a request to collect field intensity information; and the central node receives a field intensity collection response of the terminal node, wherein the field intensity collection response is used for indicating the field intensity information provided by the terminal node.
As a preferred implementation manner, in step S204, the collecting, by the central node, the field strength information of the terminal node includes: the central node acquires a neighbor table of the central node, sequentially collects field intensity information of the first-layer terminal nodes within a one-hop range around the central node, and adds the neighbor field intensity information of the first-layer terminal nodes into the field intensity information table of the central node; and after the central node finishes collecting the field intensity information of all the first-layer terminal nodes, continuously collecting the field intensity information tables of the second-layer terminal nodes and all subsequent layers by taking the first-layer terminal nodes as the relay equipment.
Preferably, in step S206, the central node configures the terminal node managed by the central node, and the converting the terminal node into the on-network operating state includes: the central node sends a terminal node configuration request command to a terminal node managed by the central node, wherein the terminal node configuration request command is used for indicating that the terminal node is requested to be configured for network access work; and the central node receives a configuration terminal node response command from the terminal node, wherein the configuration terminal node response command is used for indicating the terminal node to respond to the configuration terminal node request command.
Preferably, after step S206, the method further comprises: the newly-added terminal node sends a network access application command to the terminal node on the network, wherein the network access application command is used for indicating the newly-added terminal node to request network access; the newly added terminal node receives a network access application frame response frame from the terminal node on the network, wherein the network access application frame response frame carries information for indicating network access; and the newly added terminal node accesses the network according to the information.
Specific embodiments are provided below to describe in detail the networking method according to an embodiment of the present invention.
1. Neighbor node discovery and field intensity measurement
(1) Transmission of beacon frames
When the central node starts networking, a beacon frame is sent in the initial time slot.
When the terminal node scans the specified channel group, if a beacon frame of a network is received, the address of the terminal node sending the beacon frame is added into a neighbor table of the terminal node, and the field intensity information of the received beacon frame is recorded. Then checking beacon identification byte in the beacon load, judging whether the beacon is forwarded by the user, and if the beacon is forwarded, terminating the processing; if not, constructing the load information of the beacon frame of the user, judging whether the number of layers and the number of turns are larger than the maximum value, and if not, calling the beacon sending service of the MAC layer to send out the beacon frame in the appointed time slot or number of turns.
After sending out the networking beacon frame, the central node also monitors the local channel group and the special networking channel, and if the beacon frame forwarded by the terminal node is received, the information of the sending source node is also added into the neighbor table and the received field intensity information is recorded.
(2) Collecting field strength information
After sending out the networking beacon frame, the central node waits for the completion of the forwarding of the beacon of the whole network, and then starts to collect the field intensity table information of the terminal nodes. The central node firstly takes the information of the neighbor table of the central node, sequentially sends a field intensity collecting request to the first layer terminal nodes within one hop range around the central node, and adds the neighbor field intensity information of the first layer terminal nodes into the field intensity information table of the central node after receiving the field intensity collecting response of the first layer terminal nodes. And after the field intensity information of all the first-layer terminal nodes is collected, continuously collecting a field intensity information table of the second-layer terminal nodes by taking the first-layer terminal nodes as the relay equipment. By analogy, the central node collects field intensity information of all terminal nodes step by step until all terminal nodes are completely collected or no terminal nodes capable of being relayed are available.
(3) Configuring terminal node information
After the central node collects all the field intensity information tables of the terminal nodes which can be collected, the central node starts to sequentially configure the terminal node blocks managed by the central node according to the node files and converts the terminal node blocks into the on-network working state. This function is realized by sending a "configure end node request command" and receiving a "configure end node reply command". And 3 uplink relay paths are configured for the terminal node simultaneously in the configuration terminal node request command.
Fig. 3 is a flowchart of a wireless ad hoc network according to an embodiment of the present application, and as shown in fig. 3, the flowchart involves the following steps: powering up and initializing the node; starting a networking stage; neighbor discovery and field intensity measurement stages; a field intensity collection stage; route planning and configuration stage; and (5) a normal working stage.
2. Adding new node into normal working network
The newly added terminal nodes can actively apply for network access. When the newly added terminal node is in a free state after being electrified, network access application commands of the MAC layer are sequentially sent out on a reporting channel of a 16-channel group at random intervals, and the sending interval time of the commands is about 6 minutes. When the neighbor node in the network working state receives the network access application command of the free module, a network access application frame response frame is responded in a first channel in a channel group according to the beacon time slot of the neighbor node, and parameters such as a layer where the neighbor node is located, receiving field intensity, PanID, an uploading path and the like are attached.
When a newly added node in a free state scans a first channel of a certain channel group, if a response frame of one or more neighbor nodes in a network state is received, parameters such as a layer where the newly added node is located, bidirectional receiving field intensity and the like are compared, an uploading path of the neighbor nodes in the network state is selected, and then a field intensity ready command is sent to a central node through the uploading path, so that the newly added node is recorded in the central node, at the moment, the newly added terminal node is converted into the network state, and the active network access process is completed.
Fig. 4 is a flowchart of adding a terminal (routing) node to a network according to an embodiment of the present application, where as shown in fig. 4, the flowchart includes the following steps: the newly added node sends a network access application; at a network node: scanning a designated channel, and receiving a network access application; receiving a web application at a web node; receiving a web application at a web node; the newly added node receives the response frame; calculating and determining a reporting node by the newly added node; the newly added node sends a field intensity ready frame; sending the online report frame to a central node at a network node; the central node records node and routing information, collects field intensity and configures nodes.
Fig. 5 is a schematic diagram of a wireless node network protocol stack according to an embodiment of the application, and the ad hoc network protocol stack is described below with reference to fig. 5.
The wireless ad hoc network method is implemented by setting up each layer of a protocol stack, an interface between layers and an overall protocol stack frame, as shown in fig. 5, the protocol stack includes a physical layer, an MAC layer, a network layer and an application layer.
1. The physical layer defines an interface between a physical radio channel and the MAC sublayer, and provides a physical layer data service and a physical layer management service. The physical layer data service includes the following functions: starting and sleeping the radio frequency transceiver, detecting channel energy, detecting link quality indication of received data frame, evaluating idle channel, and transceiving data.
The wireless node in the method of this embodiment adopts a multi-channel operating mode, and during the communication process, the channel positioning must be completed before the effective information. Specifically, in the PPDU frame structure, the first item of the data frame is a preamble, which performs two functions, the first is air symbol clock synchronization, and the second is channel positioning for supporting multi-channel scanning. The current channel resources are allocated into a plurality of channel groups, each of which has a plurality of operating channels, and, according to the current channel operating mode,
the preamble is defined as two types, one is a long bootstrap code type and is used for positioning the scanning of the channel group and is used in the networking stage, and the other is a short bootstrap code type and is used for positioning the scanning of the channel in the channel group, wherein the long bootstrap code is used in the networking stage, and the short bootstrap code is used after the networking is finished.
The MAC sublayer provides two services: the MAC layer data service (MAC-layer data service) and the MAC layer management service (MLME), the former ensures the correct receiving and sending of the MAC protocol data unit in the physical layer data service, and the latter maintains a database for storing the relevant information of the MAC sublayer protocol state.
The MAC layer handles the access of all physical layer radio channels, and its main functions are: the network center node generates and transmits a network beacon; the sensing node receives and forwards the beacon according to the time slot; the channel access mode supports a collision-free carrier sense multiple access (CSMA _ CA) mechanism; support TDMA in the networking stage; a reliable communication link is provided between two peer MAC entities.
3. The network layer must ensure proper operation of the MAC sublayer and provide an appropriate service interface for the application layer. To communicate with the application layer, the network layer conceptually includes two service entities to provide the necessary functionality. The two service entities are a data service entity and a management service entity, respectively.
Network Layer Data Entity (NLDE): the NLDE should provide a data service to allow an application to transfer Application Protocol Data Units (APDUs) between two or more devices. The nodes themselves must be located in the same network. The NLDE will provide the following services:
generating network layer pdu (npdu): the NLDE should be able to generate an NPDU from a PDU of an application layer by adding an appropriate protocol header;
topology-specific routing: the NLDE should be able to transmit an NPDU to a suitable device that is the ultimate destination of the communication or the next step in the communication chain towards the ultimate destination.
Network Layer Management Entity (NLME): the NLME should provide a management service to allow an application to interact with the protocol stack. NLME should provide the following services:
and (3) route discovery: the function of finding and recording paths through the network, i.e. information can be efficiently transferred.
Receiving and controlling: a device controls when and for how long the receiver is active, so that the MAC sublayer synchronizes or receives directly.
Routing: this is the ability to efficiently exchange data in the network using different routing mechanisms, such as unicast, broadcast, multicast or many-to-one.
4. The application layer includes an APS (application support sublayer) sublayer and a device management platform. Responsibilities of the APS sublayer include: end-to-end data transmission, confirmation and retransmission are supported; the functions of searching network addresses, mapping 4-byte MAC addresses to 2-byte NWK addresses, repeating short address modification and the like are supported; supporting network channel switching; and partitioning and recombining the ultra-long data packet.
The application support sublayer provides an interface between the network layer and the application layer through a set of common services, used by the device management platform and application objects defined by the manufacturer. These services are provided by two entities: data services and management services. An APS data entity (APSDE) provides a data transmission service, i.e., APSDE-SAP, through its associated SAP. The APS management entity (APSME) provides management services, APSME-SAP, through its associated SAP and maintains a database of managed objects, also called APS Information Base (AIB).
In this embodiment, an electronic device is provided, comprising a memory in which a computer program is stored and a processor configured to run the computer program to perform the method in the above embodiments.
The programs described above may be run on a processor or may also be stored in memory (or referred to as computer-readable media), which includes both non-transitory and non-transitory, removable and non-removable media, that implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
These computer programs may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks, and corresponding steps may be implemented by different modules.
Such an apparatus or system is provided in this embodiment. The system is called a wireless network ad hoc network system, and comprises: a central node, the central node comprising:
the first sending module is used for sending a beacon frame for networking, wherein the beacon frame is used for forwarding terminal nodes of the whole network;
the collection module is used for collecting the field intensity information of the terminal node after the terminal node completes the forwarding of the beacon frame;
and the configuration module is used for configuring the terminal nodes managed by the central node according to the field intensity information of the terminal nodes collected by the collection module and converting the terminal nodes into an on-network working state.
The system or the apparatus is used for implementing the functions of the method in the foregoing embodiments, and each module in the system or the apparatus corresponds to each step in the method, which has been described in the method and is not described herein again.
For example, the system further comprises the terminal node, the terminal node comprising: the processing module is used for scanning a specified channel group, adding the address of the terminal node which sends the beacon frame into a neighbor table of the processing module if the beacon frame is received, and recording the field intensity information of the received beacon frame; and the judging module is used for judging whether to forward the beacon frame according to the beacon frame.
Preferably, the first sending module is further configured to send a field intensity collection request to the terminal node, where the field intensity collection request is used to indicate a request to collect field intensity information; the central node further comprises a first receiving module for receiving a field intensity collecting response of the terminal node, wherein the field intensity collecting response is used for indicating the field intensity information provided by the terminal node.
Preferably, the first sending module is further configured to send a terminal node configuration request command to a terminal node managed by the central node, where the terminal node configuration request command is used to indicate a request for configuring a terminal node for network access work; the first receiving module is further configured to receive a configuration terminal node response command from the terminal node, where the configuration terminal node response command is used to instruct the terminal node to respond to the configuration terminal node request command.
Preferably, the terminal node further comprises: a second sending module, configured to send a network access application command to a terminal node on the network when the terminal node is not networked, where the network access application command is used to indicate that the newly added terminal node requests network access; a second receiving module, configured to receive a network access application frame response frame from the terminal node on the network when the terminal node is not networked, where the network access application frame response frame carries information for indicating network access; and the network access module is used for accessing the network by the newly added terminal node according to the information.
By the embodiment, the problems that manual intervention is needed in the current networking process and the communication success rate of the data information cannot be guaranteed are solved, so that convenience and easiness in networking are provided.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. An ad-hoc networking method of a wireless network, comprising:
the method comprises the steps that a central node sends a beacon frame for networking, wherein the beacon frame is used for being forwarded by terminal nodes of the whole network;
the central node collects field intensity information of the terminal nodes after the terminal nodes finish the forwarding of the beacon frames;
and the central node configures the terminal nodes managed by the central node according to the collected field intensity information of the terminal nodes, and converts the terminal nodes into an on-network working state.
2. The method of claim 1, wherein after the central node transmits a beacon frame for networking, the method further comprises:
the terminal node scans a specified channel group, if the beacon frame is received, the address of the terminal node sending the beacon frame is added into a neighbor table of the terminal node, and the field intensity information of the received beacon frame is recorded;
and the terminal node judges whether to forward the beacon frame according to the beacon frame.
3. The method of claim 1, wherein the central node collecting field strength information for the terminal nodes comprises:
the central node sends a field intensity collection request to the terminal node, wherein the field intensity collection request is used for indicating a request to collect field intensity information;
and the central node receives a field intensity collection response of the terminal node, wherein the field intensity collection response is used for indicating the field intensity information provided by the terminal node.
4. The method of claim 1, wherein the central node configures an end node managed by the central node, and wherein converting the end node to an on-network operational state comprises:
the central node sends a terminal node configuration request command to a terminal node managed by the central node, wherein the terminal node configuration request command is used for indicating that the terminal node is requested to be configured for network access work;
and the central node receives a configuration terminal node response command from the terminal node, wherein the configuration terminal node response command is used for indicating the terminal node to respond to the configuration terminal node request command.
5. The method of claim 1, wherein the central node configures the terminal nodes managed by the central node according to the collected field strength information of the terminal nodes, and after the terminal nodes are switched to the on-grid operating state, the method further comprises:
the newly-added terminal node sends a network access application command to the terminal node on the network, wherein the network access application command is used for indicating the newly-added terminal node to request network access;
the newly added terminal node receives a network access application frame response frame from the terminal node on the network, wherein the network access application frame response frame carries information for indicating network access;
and the newly added terminal node accesses the network according to the information.
6. An ad-hoc network system of a wireless network, comprising a central node, the central node comprising:
the first sending module is used for sending a beacon frame for networking, wherein the beacon frame is used for forwarding terminal nodes of the whole network;
the collection module is used for collecting the field intensity information of the terminal node after the terminal node completes the forwarding of the beacon frame;
and the configuration module is used for configuring the terminal nodes managed by the central node according to the field intensity information of the terminal nodes collected by the collection module and converting the terminal nodes into an on-network working state.
7. The system of claim 6, further comprising the end node, the end node comprising:
the processing module is used for scanning a specified channel group, adding the address of the terminal node which sends the beacon frame into a neighbor table of the processing module if the beacon frame is received, and recording the field intensity information of the received beacon frame;
and the judging module is used for judging whether to forward the beacon frame according to the beacon frame.
8. The system of claim 6, wherein:
the first sending module is further configured to send a field intensity collection request to the terminal node, where the field intensity collection request is used to indicate a request to collect field intensity information;
the central node further comprises a first receiving module for receiving a field intensity collecting response of the terminal node, wherein the field intensity collecting response is used for indicating the field intensity information provided by the terminal node.
9. The system of claim 6, wherein:
the first sending module is further configured to send a terminal node configuration request command to a terminal node managed by the central node, where the terminal node configuration request command is used to instruct a request for configuring a terminal node for network access work;
the first receiving module is further configured to receive a configuration terminal node response command from the terminal node, where the configuration terminal node response command is used to instruct the terminal node to respond to the configuration terminal node request command.
10. The system of claim 6, wherein the terminal node further comprises:
a second sending module, configured to send a network access application command to a terminal node on the network when the terminal node is not networked, where the network access application command is used to indicate that the newly added terminal node requests network access;
a second receiving module, configured to receive a network access application frame response frame from the terminal node on the network when the terminal node is not networked, where the network access application frame response frame carries information for indicating network access;
and the network access module is used for accessing the network by the newly added terminal node according to the information.
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