CN111385855B - Routing node selection method, routing node selection system, control device, and storage medium - Google Patents
Routing node selection method, routing node selection system, control device, and storage medium Download PDFInfo
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- CN111385855B CN111385855B CN201910189926.2A CN201910189926A CN111385855B CN 111385855 B CN111385855 B CN 111385855B CN 201910189926 A CN201910189926 A CN 201910189926A CN 111385855 B CN111385855 B CN 111385855B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
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- H—ELECTRICITY
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Abstract
The invention provides a routing node selection method, a routing node selection system, a control device and a storage medium, wherein in each node in an ad hoc network, the nodes meeting the communication capacity condition are screened as alternative routing nodes, and the rest nodes are used as Mesh nodes; and under the condition that a plurality of candidate routing nodes exist, taking the candidate routing nodes which meet the optimal node selection condition as the optimal routing nodes. The problems that the optimal broadcast route cannot be automatically acquired by single-frequency or multi-frequency networking, signal path waste, long networking time and the like are caused are solved.
Description
Technical Field
The invention relates to the technical field of NBIOT (network node separation) low-power-consumption wide area network (LPWAN), in particular to a node selection method of a Mesh ad hoc network.
Background
At present, a large number of communication products are mostly connected through short-distance communication technologies such as Bluetooth and Wi-Fi in a narrow-area network, but not an operator mobile network, so that more broadband is consumed, a Bluetooth period needs to be built in, a WIFI entity route needs to be set, and the cost and the power consumption are higher. In order to fully meet the business requirements of the internet of things, such as equipment required by network connection, an NBIOT cellular network is constructed according to the business characteristics of the internet of things and the characteristics of a mobile communication network, the cellular data connection of low-power-consumption equipment in a Wide Area Network (WAN), namely the low-power-consumption wide area network (LPWAN), is supported, and the application of communication products in the NBIOT field is effectively supported. The low power consumption wide area network (LPWAN) has the characteristics of wide coverage, multiple connections, low speed, low cost, low power consumption, excellent architecture and the like. The NB-IOT uses a License frequency band, can adopt three deployment modes of in-band, guard band or independent carrier, and coexists with the existing network. Because of the advantages of low power consumption, wide coverage, low cost, large capacity and the like of the NB-IoT, the NB-IoT can be widely applied to various vertical industries, such as remote meter reading, asset tracking, intelligent parking, intelligent agriculture and the like.
The Mesh network, namely a wireless Mesh network, is a multi-hop (multi-hop) network, is developed from an ad hoc network, and in indoor and other semi-closed or fully-closed spaces, signals of some communication products are not enough to connect with a base station, and the Mesh network draws signals of adjacent communication products, so that the Mesh network is one of key technologies for solving the problem of the last kilometer of the communication products with insufficient signals. The wireless Mesh may cooperatively communicate with other networks. The wireless network system is a dynamic network architecture which can be continuously expanded, and any two devices can be wirelessly interconnected.
A wireless Mesh network is a novel wireless network technology completely different from a traditional wireless network. The wireless mesh network is a novel network structure based on routing and peer-to-peer network technology, has the characteristic of mobile broadband, and can dynamically and continuously expand, self-organize network, self-manage, automatically repair and self-balance. Compared with Wi-Fi, the wireless Mesh has great improvement on networking mode, transmission distance and mobility, and particularly has the characteristic of being compatible with the Wi-Fi, so that the wireless Mesh network can provide great help for the Wi-Fi in increasing the transmission distance and the mobility and expanding the application of the Wi-Fi. Simply, by adding access points to enlarge the coverage radius and load balance of the wireless network, the network structure is changed from the traditional star type to the mesh type.
The current Mesh networking technology has some technical defects, such as: the communication product nodes in the remote areas cannot be connected with the base station; the problems of signal path waste and the like are caused because a single-frequency or multi-frequency internal network can not automatically acquire an optimal alternative routing node; the MESH ad hoc network connection wastes a lot of time.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a routing node selection method, a routing node selection system, a control device, and a storage medium, which are used to solve the problems of signal path waste and long networking time caused by that a single-frequency or multi-frequency intra-network cannot automatically acquire an optimal broadcast route in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a routing node selection method applied to a Mesh ad hoc network connected to an external network; the method comprises the following steps: screening nodes which meet the communication capacity condition as alternative routing nodes in each node in the ad hoc network, and taking the rest nodes as Mesh nodes; and under the condition that the number of the alternative routing nodes is multiple, taking the candidate routing nodes which meet the optimal node selection condition as optimal routing nodes.
In an embodiment of the present invention, the communication capability condition includes a signal strength condition and/or a frequency band condition; the signal intensity condition is that the node signal intensity is greater than a signal intensity threshold value of a connection external network; the node frequency range condition is that the node working frequency or the frequency range is in a set frequency range.
In an embodiment of the present invention, the optimal node selection condition is that the candidate routing node that has the largest signal weight value as the routing node of each Mesh node is simultaneously satisfied as the optimal routing node; wherein the signal weight value is related to a signal strength of each node and the signal strength threshold of the external network.
In an embodiment of the present invention, the signal weight value is obtained according to a signal weight value calculation method; the method for calculating the signal weight value comprises the following steps: and comparing the signal strength of each alternative routing node with the signal strength threshold value connected with the external network, and synthesizing the comparison results of the signal strength of each Mesh node and the strength of each alternative routing node.
To achieve the above and other related objects, the present invention provides a routing node selection system, applied to a MESH ad hoc network connected to an external network: the method comprises the following steps:
the processing module is used for screening the nodes in the ad hoc network which meet the communication capacity condition as alternative routing nodes, and taking the other nodes as Mesh nodes; and under the condition that a plurality of candidate routing nodes exist, taking the candidate routing nodes which meet the optimal node selection condition as the optimal routing nodes.
In an embodiment of the present invention, the communication capability condition includes a signal strength condition and/or a frequency band condition; the signal intensity condition is that the node signal intensity is greater than a signal intensity threshold value of a connection external network; the node frequency range condition is that the node working frequency or the frequency range is in a set frequency range.
In an embodiment of the present invention, the optimal node selection condition is that the candidate routing node that has the largest signal weight value as the routing node of each Mesh node is simultaneously satisfied as the optimal routing node; wherein the signal weight value is related to a signal strength of each node and the signal strength threshold of the external network.
In an embodiment of the present invention, the signal weight value is obtained according to a signal weight value calculation method; the method for calculating the signal weight value comprises the following steps: and comparing the signal strength of each alternative routing node with the signal strength threshold value connected with the external network, and synthesizing the comparison results of the signal strength of each Mesh node and the strength of each alternative routing node.
To achieve the above and other related objects, the present invention provides a control device, comprising: a memory for storing a computer program; a processor for executing the computer program stored in the memory to cause the node selection method to be performed.
To achieve the above and other related objects, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the node selection method.
As described above, the routing node selection method, routing node selection system, control device, and storage medium according to the present invention have the following advantageous effects: the problems that a single-frequency or multi-frequency internal and internal networking can not automatically acquire the optimal broadcast route, signal path waste, long networking time and the like are caused are solved.
Drawings
Fig. 1 is a flowchart illustrating a routing node selection method according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a routing node selection system according to an embodiment of the present invention.
Fig. 3 is a schematic flow chart of a Mesh ad hoc network as a routing node in the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a control device in an embodiment of the invention.
Description of the element reference numerals
20 routing node selection system
21 processing module
40 control device
41 memory
42 processor
S11-S12 steps
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It is noted that in the following description, reference is made to the accompanying drawings which illustrate several embodiments of the present application. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present application. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present application is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "below," "lower," "over," "upper," and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature as illustrated in the figures.
In the technical scheme provided by the invention, the applied routing node is, for example, a computer or other equipment connected with a network which has an independent address and a function of transmitting or receiving data. The nodes may be workstations, clients, network users or personal computers, servers, printers and other network-connected devices. Each workstation, server, terminal device, network device, i.e. the device having its own unique network address, is a network node.
The invention provides a routing node selection method, which is applied to a Mesh ad hoc network connected with an external network; the method comprises the following steps: screening nodes which meet the communication capacity condition as alternative routing nodes in each node in the ad hoc network, and taking the rest nodes as Mesh nodes; and under the condition that a plurality of candidate routing nodes exist, taking the candidate routing nodes which meet the optimal node selection condition as the optimal routing nodes.
Specific embodiments are provided below in conjunction with the attached figures:
as shown in fig. 1, the present invention provides a routing node selection method, which is applied to a Mesh ad hoc network connected to an external network, where the Mesh ad hoc network is suitable for regional environment coverage and broadband high-speed wireless access for a novel wireless mobile communication technology based on IP access. The mesh internal networking comprises single-frequency networking and double-frequency networking. The external network may be a wide area network.
The method comprises the following steps:
step S11: and screening the nodes meeting the communication capacity condition as alternative routing nodes in each node in the ad hoc network, and taking the rest nodes as Mesh nodes.
In one embodiment, the node has the function of transmitting or receiving data, and the connection parameter of the connection is checked after the node is connected with an external network, and the communication capacity condition is compared. The communication capability condition comprises a signal strength condition and/or a frequency band condition; the signal intensity condition is that the node signal intensity is greater than a signal intensity threshold value of a connection external network; the node frequency range condition is that the node working frequency or the frequency range is in a set frequency range. If the condition is met, the routing node is used as an alternative routing node; if not, the node is taken as a Mesh node. The number of the alternative routing nodes and the Mesh nodes is multiple. For example, 10 nodes are connected to the wide area network, and the connected NB-IOT uses the ISM band of the License band, which is a 2.4GH z band. The node is to be satisfied within the 2.4GH z band. If the signal strength threshold of the connected wide area network is 60dbm, the signal strength of the alternative routing node connected with the wide area network is greater than 60 dbm. And 3 alternative routing nodes meeting the signal strength condition and the frequency band condition of the communication capacity condition simultaneously and 7 Mesh nodes.
Step S12: and under the condition that a plurality of candidate routing nodes exist, taking the candidate routing nodes which meet the optimal node selection condition as the optimal routing nodes.
In an embodiment, a plurality of candidate routing nodes and Mesh nodes are selected by comparing communication capacity conditions, and the candidate routing nodes are judged by the optimal node selection condition. And the most node judgment condition is that the alternative routing node which has the maximum signal weight value and is used as the routing node of each Mesh node is the optimal routing node. The signal weight value is related to the signal strength of the connection between the alternative routing node and the external network, the signal strength threshold value of the connection between the alternative routing node and the external network and the signal strength of the connection between the Mesh routing node and the external network.
In one embodiment, the signal weight value is obtained according to a signal weight value calculation method; the method for calculating the signal weight value comprises the following steps: and comparing the signal strength of each alternative routing node with a signal strength threshold value connected with the external network, and synthesizing the comparison results of the signal strength of each Mesh node and the strength of each alternative routing node. The manner of the comparison result of the signal strength of each alternative routing node and the signal strength threshold value of the external network can be in the form of a ratio; the comparison result between the signal strength of each Mesh node and the strength of each alternative routing node can be in the form of a ratio; the two ways of comparing the results are a unified way. The two comparison results are combined together, wherein the combination may be the addition of the two comparison results.
For example, if there are four nodes connected to a wide area network, two alternative routing nodes 1 and 3 are selected by communication capability conditions, and the signal strength of the alternative routing nodes connected to the wide area network is R1And R3(ii) a Two Mesh nodes are respectively a node 2 and a node 4, and the signal intensity of the Mesh nodes connected with the wide area network is respectively M2And M4(ii) a The signal strength threshold for the wide area network connection is G. Let QM2、QM4The signal weight values of Mesh routing nodes of the node 2 and the node 4 respectively;
QM2＝MAX{M2/R1+R1/G,M2/R3+R3/G}；
QM4＝MAX{M4/R1+R1/G,M4/R3+R3/G}；
and if the signal weight values of the nodes 3 all meet the signal weight values of the routing nodes of the two Mesh nodes, taking the nodes 3 as the optimal routing nodes.
Similar to the principle of the foregoing method embodiment, as shown in fig. 2, the present invention provides a routing node selection system 20, which is applied to a MESH ad hoc network connected to an external network: the method comprises the following steps:
a processing module 21, configured to screen, in each node in the ad hoc network, a node that meets a communication capability condition as an alternative routing node, and use the remaining nodes as Mesh nodes; and under the condition that a plurality of candidate routing nodes exist, taking the candidate routing nodes which meet the optimal node selection condition as the optimal routing nodes.
In one embodiment, the processing module 21 receives connection parameters of nodes connected to an external network and compares the communication capability conditions. The communication capability condition comprises a signal strength condition and/or a frequency band condition; the signal intensity condition is that the node signal intensity is greater than a signal intensity threshold value of a connection external network; the node frequency band condition is that the node working frequency or the frequency band is in a set frequency band range. If the condition is met, the routing node is used as an alternative routing node; if not, the node is taken as a Mesh node. The number of the alternative routing nodes and the Mesh nodes is multiple.
In an embodiment, the processing module 21 selects a plurality of candidate routing nodes and Mesh nodes according to the communication capability condition, where the candidate routing nodes are determined by the optimal node selection condition. And the most node judgment condition is that the alternative routing node which has the maximum signal weight value and is used as the routing node of each Mesh node is the optimal routing node. The signal weight value is related to the signal strength of the connection between the alternative routing node and the external network, the signal strength threshold value of the connection between the alternative routing node and the external network and the signal strength of the connection between the Mesh routing node and the external network
In an embodiment, the processing module 21 finds out, as the optimal routing node, the candidate routing node that simultaneously satisfies the condition that the signal weight value of the routing node serving as each Mesh node is the maximum according to the optimal node selection condition, where the signal weight value is obtained according to a signal weight value calculation method; the method for calculating the signal weight value comprises the following steps: and comparing the signal strength of each alternative routing node with a signal strength threshold value connected with the external network, and synthesizing the comparison results of the signal strength of each Mesh node and the strength of each alternative routing node. The manner of the comparison result of the signal strength of each alternative routing node and the signal strength threshold value of the external network can be in the form of a ratio; the comparison result between the signal strength of each Mesh node and the strength of each alternative routing node can be in the form of a ratio; the two ways of comparing the results are a unified way. The two comparison results are combined together, wherein the combination may be the addition of the two comparison results.
The following description of the embodiments is made with reference to fig. 3:
for example, N nodes connected to a wan check communication parameters including signal strength and frequency band, and after determining communication capability conditions, the nodes 1 and 3 meeting the conditions are used as standby routing nodes, and the rest of the nodes are Mesh nodes including node 2 and node N. And the Mesh node searches for the routing node, and the standby routing node selects the alternative routing node which meets the signal weight value of the routing node 3 of the Mesh node as the optimal routing node through the judgment of the optimal routing node condition. The routing node 3 and the Mesh node form a Mesh ad hoc network, and the Mesh node receives signals from the optimal routing node connection.
Fig. 4 is a schematic structural diagram of the control device 40 according to the embodiment of the present invention.
The electronic device 40 includes:
a memory 41 for storing a computer program;
and the processor 42 is coupled with the memory 41, wherein the processor 42 and the memory 41 can be connected through a bus mode.
In an embodiment of the present invention, the memory 41 may include, but is not limited to, a high speed random access memory, a non-volatile memory. Such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state storage devices; the Processor 42 may include, but is not limited to, a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
In an embodiment of the present invention, the present invention can further provide a computer-readable storage medium, which stores a computer program, and when the computer program runs, the method for selecting a routing node is implemented. The computer-readable storage medium may include, but is not limited to, floppy diskettes, optical disks, CD-ROMs (compact disc-read only memories), magneto-optical disks, ROMs (read-only memories), RAMs (random access memories), EPROMs (erasable programmable read only memories), EEPROMs (electrically erasable programmable read only memories), magnetic or optical cards, flash memory, or other type of media/machine-readable medium suitable for storing machine-executable instructions. The computer readable storage medium may be a product that is not accessed by the computer device or may be a component that is used by an accessed computer device.
In particular implementations, the computer programs are routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types.
In summary, the routing node selection method, the routing node selection system, the control device, and the storage medium according to the present invention select, as the candidate routing nodes, nodes that meet the communication capability condition among the nodes in the ad hoc network, and use the remaining nodes as Mesh nodes; and under the condition that a plurality of candidate routing nodes exist, taking the candidate routing nodes which meet the optimal node selection condition as the optimal routing nodes. The problems that a single-frequency or multi-frequency internal and internal networking can not automatically acquire the optimal broadcast route, signal path waste, long networking time and the like are caused are solved. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (4)
1. A routing node selection method, applied to a Mesh ad hoc network connected to an external network, the Mesh ad hoc network comprising: single-frequency networking and dual-frequency networking; the method comprises the following steps:
screening nodes which meet the communication capacity condition as alternative routing nodes in each node in the ad hoc network, and taking the rest nodes as Mesh nodes;
under the condition that a plurality of alternative routing nodes exist, taking the candidate routing nodes which meet the optimal node selection condition as optimal routing nodes;
wherein the communication capability condition comprises a signal strength condition and/or a frequency band condition; the signal intensity condition is that the node signal intensity is greater than a signal intensity threshold value of a connection external network; the node frequency band condition is that the node working frequency or the frequency band is in a set frequency band range;
the optimal node selection condition is that the alternative routing node which has the maximum signal weight value and is used as the routing node of each Mesh node is the optimal routing node; wherein the signal weight value is related to a signal strength of each node and the signal strength threshold of the external network;
and wherein the method of calculating the signal weight value is: and adding the ratio of the signal strength of each alternative routing node to the signal strength threshold value connected with the external network and the ratio of the signal strength of each Mesh node to the strength of each alternative routing node.
2. A routing node selection system, for use in a MESH ad hoc network connected to an external network, the MESH ad hoc network comprising: single-frequency networking and dual-frequency networking; the method comprises the following steps:
the processing module is used for screening the nodes in the ad hoc network which meet the communication capacity condition as alternative routing nodes, and taking the other nodes as Mesh nodes; under the condition that a plurality of alternative routing nodes exist, taking the candidate routing nodes which meet the optimal node selection condition as optimal routing nodes;
wherein the communication capability condition comprises a signal strength condition and/or a frequency band condition; the signal intensity condition is that the node signal intensity is greater than a signal intensity threshold value of a connection external network; the node frequency band condition is that the node working frequency or the frequency band is in a set frequency band range;
the optimal node selection condition is that the alternative routing node which has the maximum signal weight value and is used as the routing node of each Mesh node is the optimal routing node; wherein the signal weight value is related to a signal strength of each node and the signal strength threshold of the external network;
and wherein the signal weight value is calculated by: and adding the ratio of the signal strength of each alternative routing node to the signal strength threshold value connected with the external network and the ratio of the signal strength of each Mesh node to the strength of each alternative routing node.
3. A control device, comprising:
a memory for storing a computer program;
a processor for executing the memory-stored computer program to cause the node selection method of claim 1 to be performed.
4. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the node selection method of claim 1.
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| CA2705021A1 (en) * | 2007-11-25 | 2009-05-28 | Trilliant Networks, Inc. | Proxy use within a mesh network |
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