CN116249176B - Route establishment method, node and system of variable channel bandwidth wireless ad hoc network - Google Patents
Route establishment method, node and system of variable channel bandwidth wireless ad hoc network Download PDFInfo
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- CN116249176B CN116249176B CN202310530125.4A CN202310530125A CN116249176B CN 116249176 B CN116249176 B CN 116249176B CN 202310530125 A CN202310530125 A CN 202310530125A CN 116249176 B CN116249176 B CN 116249176B
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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
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- H—ELECTRICITY
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- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- H04L43/0894—Packet rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention relates to the technical field of wireless communication, and particularly discloses a route establishment method, node and system of a variable channel bandwidth wireless ad hoc network, comprising the following steps: constructing first service information of the self, and sending the first service information to other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth; receiving second service information sent by other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth; constructing a narrowband network topology according to the second service information; generating a routing result from a node to each other node in the variable channel bandwidth wireless ad hoc network system according to the narrowband network topology; and determining the maximum channel bandwidth which can be supported on the transmission path shown by each routing result according to the routing result and the second service information. The route establishment method of the variable channel bandwidth wireless ad hoc network has strong network transmission capability and low cost.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method for establishing a route of a wireless ad hoc network with a variable channel bandwidth, a node, and a wireless ad hoc network system with a variable channel bandwidth.
Background
Channel bandwidth is an important parameter of a wireless communication system and affects the capability of the wireless communication system. Under the condition of a certain maximum transmitting power, compared with the communication with a small channel bandwidth (hereinafter referred to as a narrow band), the communication with a large channel bandwidth (hereinafter referred to as a wide band) has the advantage of high data transmission rate, but has the defects of relatively short communication distance, relatively weak anti-interference capability and inflexible frequency selection. Therefore, the selection of the channel bandwidth needs to be flexibly determined according to the multi-party factors such as the service rate, the communication distance, the interference size, the spectrum occupation and the like.
The flexible adjustment of the channel bandwidth increases the flexibility and reliability of the communication device and brings new problems as follows. Because the transmission distance of the narrowband communication is farther and the anti-interference capability is stronger, the communication link established under the narrowband communication can not be used for completing the communication under the broadband, and further, the network topology information established on the basis of the narrowband communication can not be directly applied to the broadband communication. The network topology established in broadband communication may not fully cover some edge nodes that are far away or nodes that are disturbed more, and if the topology information is directly used to generate routing information, some nodes may not be reachable.
In the prior art, in order to improve transmission capability, the two modes of establishing the route are generally combined, namely independent network topology information is respectively established on the basis of broadband communication and narrowband communication, but the mode of establishing the route needs to transmit relevant service information through the broadband communication and the narrowband communication respectively, so that the cost of the service information is doubled, and the service bandwidth is squeezed. Especially, in the scene of large-scale networking, the overhead of service information may be too large, so that the service bandwidth cannot meet the service transmission requirement.
Therefore, how to provide a route establishment method with strong network transmission capability and low cost is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a route establishment method of a variable channel bandwidth wireless ad hoc network, a node and a variable channel bandwidth wireless ad hoc network system, which solve the problems of weak network transmission capacity and high cost in the related technology.
As a first aspect of the present invention, there is provided a route establishment method of a variable channel bandwidth wireless ad hoc network, wherein the method is applied to a variable channel bandwidth wireless ad hoc network system including a plurality of nodes, and for any one node, the route establishment method of the variable channel bandwidth wireless ad hoc network includes:
constructing first service information of the self, and sending the first service information to other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth;
receiving second service information sent by other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth;
constructing a narrowband network topology according to the second service information;
generating a routing result from a node to each other node in the variable channel bandwidth wireless ad hoc network system according to the narrowband network topology;
determining the maximum channel bandwidth which can be supported on the transmission path shown by each routing result according to the routing result and the second service information;
wherein the first service information and the second service information each comprise topology maintenance service information and channel quality indication service information.
Further, constructing first service information of the self, and sending the first service information to other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth, including:
determining the self narrow-band channel bandwidth of the node;
quality monitoring is carried out on the narrow-band channel bandwidth, and a channel quality monitoring result is recorded;
constructing channel quality indication service information of the node according to the channel quality monitoring result, and constructing topology service information of the node according to local adjacent node information of the node and an OLSR protocol;
and sending the channel quality indication service information of the node and the topology service information of the node to other nodes in the variable channel bandwidth wireless ad hoc network system through the narrow-band channel bandwidth.
Further, sending the channel quality indication service information of the node and the topology service information of the node to other nodes in the variable channel bandwidth wireless ad hoc network system through the narrow-band channel bandwidth, including:
setting a transmission channel of the channel quality indication service information of the node and the topology service information of the node as a narrow-band channel bandwidth;
and transmitting the channel quality indication service information of the node and the topology service information of the node on an air interface through the narrow-band channel bandwidth.
Further, constructing a narrowband network topology according to the second service information, including:
analyzing the second service information to obtain topology service information and channel quality indication service information of other nodes in the variable channel bandwidth wireless ad hoc network system;
generating a narrowband network topology according to topology service information of all other nodes in the variable channel bandwidth wireless ad hoc network system;
and generating a channel quality information base according to the channel quality indication service information of all other nodes in the variable channel bandwidth wireless ad hoc network system.
Further, generating a routing result from the node to each other node in the variable channel bandwidth wireless ad hoc network system according to the narrowband network topology, including:
generating a routing result of the node reaching each other node in the variable channel bandwidth wireless ad hoc network system according to the narrowband network topology and a shortest path algorithm;
traversing the route result of the node reaching each other node in the variable channel bandwidth wireless ad hoc network system, so as to execute the step of determining the maximum channel bandwidth which can be supported on the transmission path shown by each route result according to the route result and the second service information.
Further, determining the maximum supportable channel bandwidth on the transmission path shown by each routing result according to the routing result and the second service information, including:
determining channel quality information according to the routing result and the channel quality indication service information in the second service information;
and calculating the maximum channel bandwidth which can be supported on the transmission path shown by each routing result according to the channel quality information.
Further, calculating the maximum channel bandwidth that can be supported on the transmission path shown by each routing result according to the channel quality information includes:
calculating the maximum channel bandwidth of each hop link in each routing result according to the channel quality information;
and taking the minimum value of the maximum channel bandwidths of all the hop links in the routing result as the maximum channel bandwidth which can be supported on the transmission path shown by the routing result.
Further, calculating the maximum channel bandwidth of each hop link in each routing result according to the channel quality information, including:
determining narrowband channel bandwidth asThe bandwidth of the channel to be judged is +.>The narrowband channel quality real-time measurement value of the single hop link is +.>The lowest channel quality threshold available for the channel bandwidth to be determined is +.>The guard threshold of the channel quality measurement value is +.>；
Judging whether the channel bandwidth to be judged is available according to whether a judging formula is established, wherein the judging formula is as follows:
；
if the judging formula is established, determining that the bandwidth of the channel to be judged is available;
and taking the maximum value of all available channel bandwidths to be judged as the maximum channel bandwidth of the jump link.
As another aspect of the present invention, there is provided a node, including:
the first construction module is used for constructing first service information of the first construction module and sending the first service information to other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth;
the receiving module is used for receiving second service information sent by other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth;
the second construction module is used for constructing a narrowband network topology according to the second service information;
the generation module is used for generating a routing result from the node to each other node in the variable channel bandwidth wireless ad hoc network system according to the narrowband network topology;
the determining module is used for determining the maximum channel bandwidth which can be supported on the transmission path shown by each routing result according to the routing result and the second service information;
wherein the first service information and the second service information each comprise topology maintenance service information and channel quality indication service information.
As another aspect of the present invention, a variable channel bandwidth wireless ad hoc network system is provided, which includes a plurality of nodes as described above, and any two nodes can communicate with each other.
The invention provides a route establishment method of a variable channel bandwidth wireless ad hoc network, which is characterized in that first service information of each node in a variable channel bandwidth wireless ad hoc network system is constructed, the first service information is sent to other nodes in the system based on a narrow-band channel bandwidth, second service information sent by other nodes in the system can be received, a narrow-band network topology can be constructed according to the second service information of other nodes, a route result of the node is determined according to the narrow-band network topology after the narrow-band network topology is constructed, and then the maximum channel bandwidth which can be supported on a transmission path shown by the route result is determined, so that route construction is completed. The route establishment method of the variable channel bandwidth wireless ad hoc network provided by the invention utilizes the narrow-band communication to send topology to establish relevant service information, establishes a network topology based on a narrow band, simultaneously utilizes the relevant information of communication quality carried in the service information to calculate the state of broadband communication, then combines the narrow-band network topology and a calculation result to generate the route information with predictable full-path channel bandwidth, and ensures that the topology information of all nodes in the network can be acquired when the network topology is established by utilizing the narrow-band communication, and compared with the prior art of sending the service information by broadband or narrow-band communication respectively, the cost of the service information is greatly reduced; meanwhile, the method can calculate the broadband communication condition by utilizing the channel quality information, and finally establishes the routing information with predictable full path channel bandwidth, thereby achieving the function requirement and simultaneously having the advantage of small service cost.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention.
Fig. 1 is a flowchart of a route establishment method of a variable channel bandwidth wireless ad hoc network provided by the present invention.
Fig. 2 is a flow chart of the construction of self service information provided by the invention.
Fig. 3 is a flowchart for constructing a narrowband network topology according to the present invention.
Fig. 4 is a flowchart of route result generation provided by the present invention.
Fig. 5 is a flowchart for determining a maximum channel bandwidth provided by the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this embodiment, a method for establishing a route of a variable channel bandwidth wireless ad hoc network is provided, which is applied to a variable channel bandwidth wireless ad hoc network system, where the variable channel bandwidth wireless ad hoc network system includes a plurality of nodes, and fig. 1 is a flowchart of the method for establishing a route of a variable channel bandwidth wireless ad hoc network according to an embodiment of the present invention, as shown in fig. 1, including:
s100, constructing first service information of the self, and sending the first service information to other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth;
in the embodiment of the invention, each node needs to construct own first service information, and the first service information comprises topology maintenance service information and channel quality indication service information. And sending the constructed first service information to other nodes in the variable channel bandwidth wireless ad hoc network system through the narrow-band channel bandwidth.
For example, if the variable channel bandwidth wireless ad hoc network system includes N nodes, where N is a natural number greater than 1, the current node needs to send its own first service information to other N-1 nodes.
S200, receiving second service information sent by other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth;
it should be understood that each node is also capable of receiving second service information sent by other nodes, where the second service information likewise includes topology maintenance service information and channel quality indication service information.
Here, the first service information and the second service information include topology maintenance service information and channel quality indication service information, and for each node, the first service information is built by its own node, and the second service information is sent by other nodes.
Likewise, the current node may receive second service information sent by other N-1 nodes.
S300, constructing a narrowband network topology according to the second service information;
in the embodiment of the invention, each node can construct a narrowband network topology according to the second service information, namely, each node constructs a narrowband network topology belonging to the node. For example, the variable channel bandwidth wireless ad hoc network system includes N nodes, and N narrowband network topologies are constructed in the variable channel bandwidth wireless ad hoc network system.
S400, generating a routing result from a node to each other node in the variable channel bandwidth wireless ad hoc network system according to the narrowband network topology;
each node can generate route results from the node to other nodes according to the narrowband network topology of the node, namely N nodes have N-1 route results.
S500, determining the maximum channel bandwidth which can be supported on a transmission path shown by each routing result according to the routing result and the second service information;
it should be understood that each routing result is indicated as one transmission path, and that N-1 routing results are indicated as N-1 transmission paths. And determining the maximum channel bandwidth which can be supported on each transmission path according to the routing result and the second service information, namely indicating the maximum channel bandwidth allowed by the routing result of the node, and thus completing the establishment of the routing.
Therefore, the route establishment method of the variable channel bandwidth wireless ad hoc network provided by the invention constructs the first service information of each node in the variable channel bandwidth wireless ad hoc network system, sends the first service information to other nodes in the system based on the narrow-band channel bandwidth, can receive the second service information sent by other nodes in the system, can construct narrow-band network topology according to the second service information of other nodes, and after constructing the narrow-band network topology, determines the route result of the node according to the narrow-band network topology, and further determines the maximum channel bandwidth which can be supported on a transmission path shown by the route result so as to finish route construction. The route establishment method of the variable channel bandwidth wireless ad hoc network provided by the invention utilizes the narrow-band communication to send topology to establish relevant service information, establishes a network topology based on a narrow band, simultaneously utilizes the relevant information of communication quality carried in the service information to calculate the state of broadband communication, then combines the narrow-band network topology and a calculation result to generate the route information with predictable full-path channel bandwidth, and ensures that the topology information of all nodes in the network can be acquired when the network topology is established by utilizing the narrow-band communication, and compared with the prior art of sending the service information by broadband or narrow-band communication respectively, the cost of the service information is greatly reduced; meanwhile, the method can calculate the broadband communication condition by utilizing the channel quality information, and finally establishes the routing information with predictable full path channel bandwidth, thereby achieving the function requirement and simultaneously having the advantage of small service cost.
In the embodiment of the present invention, in order to implement construction of service information of a node, specifically, as shown in fig. 2, first service information of the node is constructed, and the first service information is sent to other nodes in the variable channel bandwidth wireless ad hoc network system through a narrowband channel bandwidth, including:
s110, determining the self narrow-band channel bandwidth of the node;
specifically, taking node M as an example, node M selects the minimum value of all the supported channel bandwidths as the narrowband channel bandwidth.
S120, quality monitoring is carried out on the narrow-band channel bandwidth, and a channel quality monitoring result is recorded;
in the embodiment of the invention, the node M monitors the quality of the bandwidth of the narrow-band channel and records the monitoring result.
S130, constructing channel quality indication service information of the node according to the channel quality monitoring result, and constructing topology service information of the node according to local adjacent node information of the node and an OLSR (Optimized Link State Routing, optimized link state routing protocol) protocol;
specifically, the node M may construct topology service information of itself in combination with local neighboring node information and OLSR protocol. In addition, the node M can also construct channel quality indication service information according to the channel quality monitoring result.
It should be noted that, the channel quality indication service information may be independent of the topology service information or carried in the topology service information, that is, the channel quality indication service information and the two independent information in the case of the topology service information may be sent separately by two sets of mechanisms, or the channel quality indication service information may be carried in the topology service information and sent by means of the mechanism of the topology service information.
And S140, transmitting the channel quality indication service information of the node and the topology service information of the node to other nodes in the variable channel bandwidth wireless ad hoc network system through the narrow-band channel bandwidth.
In the embodiment of the invention, the method specifically comprises the following steps:
setting a transmission channel of the channel quality indication service information of the node and the topology service information of the node as a narrow-band channel bandwidth;
and transmitting the channel quality indication service information of the node and the topology service information of the node on an air interface through the narrow-band channel bandwidth.
It should be understood that, in particular, the node M may send the channel quality indication service information and the topology service information of the node on the air interface through the narrowband channel bandwidth.
It should also be understood herein that the node M may send the first service information through a narrowband channel bandwidth, and may also receive the second service information sent by other nodes through a narrowband channel bandwidth.
Specifically, as shown in fig. 3, constructing a narrowband network topology according to the second service information includes:
s310, analyzing the second service information to obtain topology service information and channel quality indication service information of other nodes in the variable channel bandwidth wireless ad hoc network system;
it should be understood that after receiving the second service information sent by the other nodes, the node M parses the second service information and records the parsing result.
S320, generating a narrow-band network topology according to topology service information of all other nodes in the variable channel bandwidth wireless ad hoc network system;
node M is able to generate a narrowband network topology in combination with the recorded topology service information of all other nodes.
S330, generating a channel quality information base according to the channel quality indication service information of all other nodes in the variable channel bandwidth wireless ad hoc network system.
The node M can combine the analyzed channel quality indication service information of all other nodes to generate a channel quality information base.
In an embodiment of the present invention, in order to determine a routing result, as shown in fig. 4, a routing result from a node to each other node in the variable channel bandwidth wireless ad hoc network system is generated according to the narrowband network topology, including:
s410, generating a routing result of the node to each other node in the variable channel bandwidth wireless ad hoc network system according to the narrowband network topology and a shortest path algorithm;
in the embodiment of the present invention, the shortest path algorithm may be specifically a Dijkstra algorithm, and a specific implementation process of the Dijkstra algorithm is well known to those skilled in the art and is not described herein.
And S420, traversing the route result of the node reaching each other node in the variable channel bandwidth wireless ad hoc network system to execute the step of determining the maximum channel bandwidth which can be supported on the transmission path shown by each route result according to the route result and the second service information.
Specifically, as shown in fig. 5, determining, according to the routing result and the second service information, a maximum channel bandwidth supportable on a transmission path shown by each routing result includes:
s510, determining channel quality information according to the routing result and the channel quality indication service information in the second service information;
in the embodiment of the invention, traversing each hop link of each routing result; and inquiring the channel quality information of each hop link of each routing result in a channel quality information base, wherein the channel quality information base is generated according to the channel quality indication service information in the second service information.
S520, calculating the maximum channel bandwidth which can be supported on the transmission path shown by each routing result according to the channel quality information.
Specifically, calculating, according to the channel quality information, a maximum channel bandwidth supportable on a transmission path indicated by each routing result, including:
1) Calculating the maximum channel bandwidth of each hop link in each routing result according to the channel quality information;
further specifically, calculating the maximum channel bandwidth of each hop link in each routing result may specifically include:
determining narrowband channel bandwidth asThe bandwidth of the channel to be judged is +.>The narrowband channel quality real-time measurement value of the single hop link is +.>The lowest channel quality threshold available for the channel bandwidth to be determined is +.>The guard threshold of the channel quality measurement value is +.>；
Judging whether the channel bandwidth to be judged is available according to whether a judging formula is established, wherein the judging formula is as follows:
；
if the judging formula is established, determining that the bandwidth of the channel to be judged is available;
and taking the maximum value of all available channel bandwidths to be judged as the maximum channel bandwidth of the jump link.
2) And taking the minimum value of the maximum channel bandwidths of all the hop links in the routing result as the maximum channel bandwidth which can be supported on the transmission path shown by the routing result.
It should be noted that, for example, the variable channel bandwidth wireless ad hoc network system includes N nodes, since each node generates a routing result from the node to each other node, there are N-1 routing results, and each routing result corresponds to a transmission path, and each transmission path may have a multi-hop link, for example, a transmission path from node P to node Q includes a 2-hop link (P-X-Q), that is, node P to node X is a first hop, and node X to node Q is a second hop. At this time, the maximum channel bandwidth of each hop link in the transmission path needs to be calculated, that is, the maximum channel bandwidths of the first hop link and the second hop link need to be calculated respectively, and after the calculation is completed, the maximum channel bandwidth of the first hop link and the maximum channel bandwidth of the second hop link are compared, and the minimum value in the maximum channel bandwidth and the maximum channel bandwidth can be supported by the routing result. For example, if the maximum channel bandwidth of the first hop link is 8M and the maximum channel bandwidth of the second hop link is 12M, the maximum channel bandwidth that can be supported on the transmission path indicated by the routing result is 8M.
And sequentially determining the maximum channel bandwidth which can be supported on the transmission path shown by each routing result according to the mode, and completing the route establishment of the variable channel bandwidth wireless ad hoc network system.
The route establishing method of the variable channel bandwidth wireless ad hoc network only establishes topology in a narrow band, calculates information to be transmitted in a wide band, judges whether the calculated result can allow transmission or not and depends on the maximum channel bandwidth allowed to be transmitted by the established route result, and transmits the information if the maximum channel bandwidth allowed by the current route result can transmit the wide band information, so that the problem that the information is unreachable can be avoided, the transmission capability of the system is improved, and meanwhile, compared with the prior art, the topology established by the narrow band can reduce the expenditure of service information.
As another embodiment of the present invention, there is provided a node, including:
the first construction module is used for constructing first service information of the first construction module and sending the first service information to other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth;
the receiving module is used for receiving second service information sent by other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth;
the second construction module is used for constructing a narrowband network topology according to the second service information;
the generation module is used for generating a routing result from the node to each other node in the variable channel bandwidth wireless ad hoc network system according to the narrowband network topology;
the determining module is used for determining the maximum channel bandwidth which can be supported on the transmission path shown by each routing result according to the routing result and the second service information;
wherein the first service information and the second service information each comprise topology maintenance service information and channel quality indication service information.
The specific working process of the node provided by the invention can refer to the description of the route establishment method of the variable channel bandwidth wireless ad hoc network, and the description is omitted here.
As another embodiment of the present invention, a variable channel bandwidth wireless ad hoc network system is provided, which includes a plurality of the foregoing nodes, and any two nodes can implement communication therebetween.
The specific working process of the variable channel bandwidth wireless ad hoc network system provided by the present invention can refer to the description of the route establishment method of the variable channel bandwidth wireless ad hoc network, and the description is omitted here.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (7)
1. The method for establishing the route of the wireless ad hoc network with the variable channel bandwidth is characterized by being applied to the wireless ad hoc network system with the variable channel bandwidth, wherein the wireless ad hoc network system with the variable channel bandwidth comprises a plurality of nodes, and the method for establishing the route of the wireless ad hoc network with the variable channel bandwidth comprises the following steps of:
constructing first service information of the self, and sending the first service information to other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth;
receiving second service information sent by other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth;
constructing a narrowband network topology according to the second service information;
generating a routing result from a node to each other node in the variable channel bandwidth wireless ad hoc network system according to the narrowband network topology;
determining the maximum channel bandwidth which can be supported on the transmission path shown by each routing result according to the routing result and the second service information;
wherein the first service information and the second service information each comprise topology maintenance service information and channel quality indication service information;
determining the maximum channel bandwidth which can be supported on the transmission path shown by each routing result according to the routing result and the second service information, wherein the method comprises the following steps:
determining channel quality information according to the routing result and the channel quality indication service information in the second service information;
calculating the maximum channel bandwidth which can be supported on the transmission path shown by each routing result according to the channel quality information;
calculating the maximum channel bandwidth which can be supported on the transmission path shown by each routing result according to the channel quality information, wherein the method comprises the following steps:
calculating the maximum channel bandwidth of each hop link in each routing result according to the channel quality information;
taking the minimum value of the maximum channel bandwidths of all the hop links in the routing result as the maximum channel bandwidth which can be supported on the transmission path shown by the routing result;
calculating the maximum channel bandwidth of each hop link in each routing result according to the channel quality information, wherein the maximum channel bandwidth comprises the following steps:
determining narrowband channel bandwidth asThe bandwidth of the channel to be judged is +.>The narrowband channel quality real-time measurement value of the single hop link is +.>The lowest channel quality threshold available for the channel bandwidth to be determined is +.>The guarantee threshold of the channel quality measurement value is；
Judging whether the channel bandwidth to be judged is available according to whether a judging formula is established, wherein the judging formula is as follows:
；
if the judging formula is established, determining that the bandwidth of the channel to be judged is available;
and taking the maximum value of all available channel bandwidths to be judged as the maximum channel bandwidth of the jump link.
2. The route setup method of a variable channel bandwidth wireless ad hoc network according to claim 1, wherein constructing first service information of itself and transmitting the first service information to other nodes in the variable channel bandwidth wireless ad hoc network system through a narrowband channel bandwidth comprises:
determining the self narrow-band channel bandwidth of the node;
quality monitoring is carried out on the narrow-band channel bandwidth, and a channel quality monitoring result is recorded;
constructing channel quality indication service information of the node according to the channel quality monitoring result, and constructing topology service information of the node according to local adjacent node information of the node and an OLSR protocol;
and sending the channel quality indication service information of the node and the topology service information of the node to other nodes in the variable channel bandwidth wireless ad hoc network system through the narrow-band channel bandwidth.
3. The route establishment method of the variable channel bandwidth wireless ad hoc network according to claim 2, wherein transmitting the channel quality indication service information of the own node and the topology service information of the own node to other nodes in the variable channel bandwidth wireless ad hoc network system through the narrowband channel bandwidth comprises:
setting a transmission channel of the channel quality indication service information of the node and the topology service information of the node as a narrow-band channel bandwidth;
and transmitting the channel quality indication service information of the node and the topology service information of the node on an air interface through the narrow-band channel bandwidth.
4. The method for establishing a route for a variable channel bandwidth wireless ad hoc network according to claim 1, wherein constructing a narrowband network topology based on the second service information comprises:
analyzing the second service information to obtain topology service information and channel quality indication service information of other nodes in the variable channel bandwidth wireless ad hoc network system;
generating a narrowband network topology according to topology service information of all other nodes in the variable channel bandwidth wireless ad hoc network system;
and generating a channel quality information base according to the channel quality indication service information of all other nodes in the variable channel bandwidth wireless ad hoc network system.
5. The method for establishing a route for a variable channel bandwidth wireless ad hoc network according to claim 1, wherein generating a routing result from a node to each other node in the variable channel bandwidth wireless ad hoc network system according to the narrowband network topology comprises:
generating a routing result of the node reaching each other node in the variable channel bandwidth wireless ad hoc network system according to the narrowband network topology and a shortest path algorithm;
traversing the route result of the node reaching each other node in the variable channel bandwidth wireless ad hoc network system, so as to execute the step of determining the maximum channel bandwidth which can be supported on the transmission path shown by each route result according to the route result and the second service information.
6. A node for implementing the method for establishing a route for a variable channel bandwidth wireless ad hoc network according to any one of claims 1 to 5, comprising:
the first construction module is used for constructing first service information of the first construction module and sending the first service information to other nodes in the variable channel bandwidth wireless ad hoc network system through the narrow-band channel bandwidth;
the receiving module is used for receiving second service information sent by other nodes in the variable channel bandwidth wireless ad hoc network system through a narrow-band channel bandwidth;
the second construction module is used for constructing a narrowband network topology according to the second service information;
the generation module is used for generating a routing result from the node to each other node in the variable channel bandwidth wireless ad hoc network system according to the narrowband network topology;
the determining module is used for determining the maximum channel bandwidth which can be supported on the transmission path shown by each routing result according to the routing result and the second service information;
wherein the first service information and the second service information each comprise topology maintenance service information and channel quality indication service information.
7. A variable channel bandwidth wireless ad hoc network system comprising a plurality of nodes according to claim 6, wherein communication between any two nodes is enabled.
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