JP4673703B2 - Route design apparatus and route design method - Google Patents

Description

  The present invention provides an ad hoc network design that does not have a fixed facility such as a base station and constructs a network by mutual relaying between mobile radio communication devices. The present invention relates to a route design apparatus and a route design method for designing a redundant route for maintaining communication even when it cannot be used.

  In a fixed optical communication network, as a method of ensuring survivability (a function of providing a service even when a failure occurs) and maintaining the service even when a failure occurs, Japanese Patent Application Laid-Open No. 2002-335192 “from work circuit to protection circuit” There was a method to enable high-speed protection switching. Further, as a method for constructing an ad hoc network with a mobile radio communication apparatus without a fixed station, there was a "Bluetooth on demand routing and network formation method and a communication method in a Bluetooth group ad hoc network" disclosed in Japanese Patent Laid-Open No. 2003-324447. . However, there was no way to ensure ad hoc network survivability.

  For example, Japanese Patent Laid-Open No. 2002-335192 describes a method for designing a survival network in wired communication. In the invention described in Japanese Patent Application Laid-Open No. 2002-335192, when nodes (communication devices) and links (communication routes) constituting a network are given, a plurality of independent routes (“independent routes” are outgoing calls). This means that a node that relays between the node and the destination node is not shared by another communication path), and the communication path is switched efficiently when a failure occurs.

  In addition, for example, there is a method of relaying by a flying body such as an aircraft in order to ensure communication (connectivity) between nodes arranged over a wide area. As an example of this method, “K. Chandrashkar, MR Dekhordi, J. S. Baras” “Providing full connectivity in large ad-hoc networks by dynamic E 200 M There is.

As a similar method, there is “Coordinating flocking of UAVs for improved connectivity of mobile ground nodes” by the P. Basu, J. Radi, V. Shrubanov, 4th year, IEEE, 200, LEE. Although these methods ensure connectivity (connectivity) between nodes and perform route design so that there is one route connecting the nodes, they do not provide a redundant route in the event of a failure.
JP 2002-335192 A JP 2003-324447 A “Providing full connectivity in large ad-hoc networks by dynamics E, 200 E, 200 liters of energy” by K. Chandrashkar, MR Dekhordi, J. S. Baras. "P. Basu, J. Radi, V. Shrubanov" Coordinated flocking of UAVs for improved connectivity of mobile ground nodes ", IEEE MILCOM, 2004, 2004.

  However, in an ad hoc network that does not have a fixed communication facility such as a base station and constructs a network by mutual relaying between mobile radio communication devices, the position of the nodes constituting the network moves. The link is not a wired cable but an unstable wireless connection. For this reason, it is difficult to apply the conventional method. In addition, when radio waves do not reach the destination node directly and it is necessary to set a relay node between them, there are many indefinite matters such as the position of the node moving or the way radio waves arrive is not constant. Thus, in the conventional invention, it has not been possible to efficiently provide a solution such as where to set a relay node and how to design a communication path.

  In addition, the conventional method of securing connectivity (connectivity) using a method of relaying by an aircraft such as an aircraft is to use one route (route in wireless communication) for both the route between ground nodes and the route between aircraft nodes. There was no redundancy in case of failure.

  The present invention has been made to solve the above-described problems. In an ad hoc network that does not have a fixed communication facility such as a base station and constructs a network by mutual relay between mobile radio communication devices, a plurality of The purpose is to design an independent route and ensure survivability.

  In addition, the present invention was made to solve the above-described problems, and is relayed by a flying body such as an aircraft in order to ensure communication (connectivity) between nodes arranged over a wide area. The purpose of this is not only to secure a single communication path, but also to design a plurality of independent paths to ensure survivability.

A route design device for designing a network route between a first wireless communication device and a second wireless communication device according to the present invention includes a communicable range between the first wireless communication device and the second wireless communication device. A communication range information storage unit for storing communication range information indicating
A position information input unit for inputting first position information indicating the position of the first wireless communication device and second position information indicating the position of the second wireless communication device; and the communication range information storage unit. The oblique coordinate generation unit that generates an oblique coordinate graph having the communicable range indicated by the communication range information to be stored as one scale, the first position information input by the position information input unit, and the second position information The first coordinate point and the second coordinate point obtained by obtaining the first coordinate point and the second coordinate point on the oblique coordinate graph generated by the oblique coordinate generation unit corresponding to each of Are arranged on the oblique coordinate graph, and an arrangement processing unit for generating a surrounding boundary line surrounding the arranged first coordinate point and the second coordinate point on the oblique coordinate graph, and the arrangement The surrounding boundary generated by the processing unit on the oblique coordinate graph is inside the surrounding boundary. A peripheral boundary reduction unit that generates a reduced peripheral boundary line on the oblique coordinate graph that is reduced by moving and enclosing the first coordinate point and the second coordinate point; A degeneration rule information storage unit for storing degeneration rule information for arranging a communication device to degenerate a surrounding boundary line, and the degeneration rule information stored in the degeneration rule information storage unit, and the surrounding boundary reduction unit includes the oblique coordinate graph. The reduced surrounding boundary line is reduced and the reduced surrounding boundary line is generated on the oblique coordinate graph so as to pass through the virtual communication apparatus arranged by placing the virtual communication apparatus inside the reduced surrounding boundary line generated above. A virtual interface arranged by the boundary degeneration unit, the degenerate peripheral boundary line generated by the boundary degeneration unit on the oblique coordinate graph, the first coordinate point, the second coordinate point, and the boundary degeneration unit The position on the oblique coordinate graph of the device Characterized in that a route design unit for generating and outputting a route design information to design the network path from the.

  The route design apparatus of the present invention uses the network design framework based on the oblique coordinate graph to connect the nodes even when the nodes (communication devices constituting the network) move and the links (communication routes) are not fixed. There is an effect that it is possible to design a plurality of communication paths to be performed, and positions and the number of installed relay nodes that relay the transmission node and the destination node.

  In addition, in order to determine the optimal route strictly, it is a network design that requires a huge amount of processing to verify the combination of all nodes. However, by executing the degeneration rules set in the degeneration rule information, A route connecting two or more routes can be obtained.

Embodiment 1 FIG.
In the first embodiment, an example of a route design method executed by the route design device and a route design device that includes a framework processing unit that uses an oblique coordinate graph, an enclosure processing unit that designs a network model according to the degeneracy rule information, and the like. Will be explained.

  FIG. 1A shows an ad hoc network model of the present invention, and FIG. 1B shows an outline of a network design method. In FIG. 1A, a network model 10 indicating a network configuration is given a source node 1S of a mobile radio communication device and a destination node 1D of the mobile radio communication device. The route design apparatus designs the route of FIG. 1B from the given network model 10 of FIG. In FIG. 1B, communication apparatuses are connected by a wireless link 2 and routes 3a, 3b, 3c, and 3d connecting two points in the network are designed. In the network model 10, when attention is paid to the mutual connection relationship, the mobile wireless communication device is called a node, and the wireless connection between the nodes is called a link. Here, a link 2 indicated by a thick arrow indicates individual connections between nodes, and paths 3a, 3b, 3c, and 3d indicate paths indicated by broken-line arrows. Consider a case in which data is transmitted from the source node 1S to the two destination nodes 1D in the network model 10 of FIG. Note that a hexagonal grid 4 indicates a range in which direct radio waves of the nodes of the transmission node 1S and the destination node 1D reach.

  When the radio wave does not reach directly from the source node 1S to each destination node 1D and it is necessary to set the relay node 1R in between, it is determined where the relay node 1R should be set and how the route should be designed There were too many things to do, and the conventional method could not give an efficient solution. Here, the conventional invention described in “Japanese Patent Laid-Open No. 2002-335192” will be briefly described, and problems in the conventional network design will be considered.

  FIGS. 2A to 2C show a method of ensuring survivability (a function that provides a service even when a failure occurs) by duplicating a conventional wired communication path as disclosed in JP-A-2002-335192 and the like. It is a schematic diagram. In FIG. 2, a network model 10 indicating a network configuration includes a node 1 that is a communication device such as a communication terminal or a router (particularly, a source node is a source node 1S and a destination node is a destination node 1D) and a communication device. It is indicated by a link 2 formed by a cable such as a metal cable or an optical fiber to be connected and paths 31, 32, 33 connecting two points in the network. In the network model 10, when attention is paid to the mutual connection relationship, the communication device is called a node, and the cable is called a link. Here, link 2 indicates individual connections between nodes. The paths 31, 32, and 33 indicate the entire path indicated by a broken-line arrow indicated by a pair of thick-line arrows.

  Consider a case in which data is transmitted from the source node 1S to the destination node 1D in the network model 10 of FIG. From the source node 1S to the destination node 1D, one route 31 is set in FIG. 2B, and two routes 32 and 33 are set in FIG. 2C. When there is a single path as shown in FIG. 2B, when a failure occurs in the node 1 or the link 2 of the path 31, communication from the source node 1S to the destination node 1D becomes impossible. However, as shown in FIG. 2B, when there are two independent paths, communication is possible through the other path 33 even if one path 32 is disconnected. Here, the plurality of routes being independent means that the node 1 and the link 2 are not shared by different routes.

  In the conventional wired communication survivable network design method, when the nodes 1, 1S, 1D and the link 2 as shown in FIG. 2A are given, that is, the essential elements for configuring the network model 10 are known. In this case, a plurality of independent paths 32 and 33 as shown in FIG. 2 (c) are efficiently found and are switched efficiently when a failure occurs.

  However, in an ad hoc network that does not have a fixed communication facility such as a base station and constructs a network by mutual relay between mobile radio communication devices, the positions of the nodes 1 and 1S, 1D in FIG. It is difficult to apply the conventional method because is not a wired cable but an unstable wireless connection. With regard to the ad hoc network model shown in FIG. 1, considering the case where data communication is performed from the source node 1S to the two destination nodes 1D in FIG. 1A, direct radio waves are transmitted from the source node 1S to the destination node 1D. If there is a need to set the relay node 1R in between, there are too many indefinite matters (movement of the node, change in radio wave condition, etc.), and in the conventional method, where the relay node 1R is set and which Thus, it has not been possible to efficiently provide a solution such as whether the route should be designed.

  Therefore, in the route designing apparatus according to the first embodiment, as shown in FIG. 1B, a hexagonal grid 4 is set to assist in designing the route, and a plurality of routes 3a, 3b, 3c, 3d are set there. design. In FIG. 1B, two paths 3a and 3b and paths 3c and 3d are set from the source node 1S to the two destination nodes 1D, respectively. Here, the route of the network model is designed by executing the framework processing part that mainly generates the oblique coordinate graph, which assists the route design, and the degeneracy rule information indicating the rules for setting the relay node in the network design. A path design apparatus constituted by a two-stage processing unit with an enclosure processing unit to be described will be described below.

  FIG. 3 is a block diagram showing an example of elements constituting the route design apparatus of this embodiment. In FIG. 3, the route design device 50 includes a position information input unit 51 that receives position information 60 having at least latitude information and longitude information from a node 40 that is a source node or a destination node that constitutes a network model. In addition, a framework processing unit 53 that mainly generates an oblique coordinate graph, and an enclosing processing unit 70 that executes degenerate rule information indicating rules for setting relay nodes in network design to design a route of a network model, Is provided.

  The framework processing unit 53 includes a communication range information storage unit 55 that stores communication range information that indicates the communicable range of the node 40 as a distance, and a diagonal that uses the communication range information stored in the communication range information storage unit 55 as one scale. An oblique coordinate generation unit 57 for generating a coordinate graph, a coordinate point on the oblique coordinate graph of the position information 60 is obtained, a node 40 is arranged on the oblique coordinate graph, and the node arranged on the oblique coordinate graph. And an arrangement processing unit 59 for generating a peripheral boundary line surrounding the coordinate point corresponding to 40 on the oblique coordinate graph.

  In addition, the surrounding processing unit 70 moves the surrounding boundary line to the inside of the surrounding boundary line to generate a reduced surrounding boundary line that reduces the range surrounded by the surrounding boundary line on the oblique coordinate graph. Is provided. Further, a degeneration rule that stores degeneration rule information indicating a rule for generating a degenerate peripheral boundary line in which a virtual communication apparatus is arranged inside the reduced peripheral boundary line and the reduced peripheral boundary line passing over the virtual communication apparatus is degenerated. In accordance with the information storage unit 75 and the reduction rule information, the virtual communication device is arranged inside the reduced peripheral boundary line, the reduced peripheral boundary line is reduced so as to pass through the virtual communication device, and the reduced peripheral boundary line is inclined. A boundary degeneration section 77 is provided on the coordinate graph. Further, the position on the network model where the relay node is arranged is determined from the degenerated peripheral boundary line generated by the boundary degeneration unit 77, the coordinate point of the node 40, and the position on the oblique coordinate graph of the virtual communication device, A route design unit 79 for designing a network route of the network model to generate route information and outputting the route information is provided. Although the node 40 shown in FIG. 3 is two of a transmission node and a destination node, the number of nodes in the network model may be two or more.

  FIG. 4 is a diagram illustrating an example of communication range information stored in the communication range information storage unit 55. The communication range information is a radius distance when the communicable region of the node 40 is indicated by a circle, for example. The communication range information stored in the communication range information storage unit 55 in FIG. 4 is 1 kilometer.

  FIG. 5 is a diagram illustrating an appearance of the route design apparatus according to the first embodiment. In FIG. 5, the route design device 50 includes a system unit 200, a CRT (Cathode Ray Tube) display device 141, a keyboard (K / B) 142, a mouse 143, a compact disc device (CDD) 186, a printer device 187, and a scanner device 188. These are connected by a cable. Further, the route design device 50 is connected to the FAX machine 310 and the telephone 320 by a cable, and is connected to the Internet 501 via a local area network (LAN) 505 and a web server 500, and in addition to wireless communication, it is wired. Communication is also possible.

  FIG. 6 is a hardware configuration diagram of the route design apparatus according to the first embodiment. In FIG. 6, the route design apparatus 50 includes a CPU (Central Processing Unit) 137 that executes a program. The CPU 137 includes a ROM 139, a RAM 140, a communication board 144, a CRT display device 141, a K / B 142, a mouse 143, an FDD (Flexible Disk Drive) 145, a magnetic disk device 146, a CDD 186, a printer device 187, and a scanner device 188 via a bus 138. Connected with. The RAM is an example of a volatile memory. ROM, FDD, CDD, magnetic disk device, and optical disk device are examples of nonvolatile memory. These are examples of a storage device or a storage unit. The communication board 144 is connected to the FAX machine 310, the telephone device 320, the LAN 505, and the like. For example, the communication board 144, the K / B 142, the FDD 145, and the like are examples of the information input unit. For example, the communication board 144, the scanner device 188, the CRT display device 141, and the like are examples of an output unit.

  Here, the communication board is not limited to the LAN 505, and may be directly connected to the Internet or a WAN (wide area network) such as ISDN. When directly connected to the Internet or a WAN such as ISDN, the route design apparatus 50 is connected to the Internet or a WAN such as ISDN, and the web server 500 is not required. The magnetic disk device 146 stores an operating system (OS) 147, a window system 148, a program group 149, and a file group 150. The program group is executed by the CPU 137, the OS 147, and the window system 148.

  The program group 149 stores a program for executing a function described as “˜unit” in the description of the embodiment described below. The program is read and executed by the CPU. In the file group 150, what is described as “determination result of”, “calculation result of”, and “processing result of” in the description of the embodiment described below is stored as “˜file”. Yes. In addition, an arrow portion of the flowchart described in the description of the embodiment described below mainly indicates input / output of data, and for the input / output of the data, data includes a magnetic disk device, an FD (Flexible Disk), an optical disk, It is recorded on other recording media such as CD (compact disc), MD (mini disc), DVD (Digital Versatile Disk). Alternatively, it is transmitted through a signal line or other transmission medium.

  In addition, what is described as “˜unit” in the description of the embodiment described below may be realized by firmware stored in the ROM 139. Alternatively, it may be implemented by software alone, hardware alone, a combination of software and hardware, or a combination of firmware.

  In addition, programs for carrying out the embodiments described below also include other magnetic disk devices, FD (Flexible Disk), optical disc, CD (compact disc), MD (mini disc), DVD (Digital Versatile Disc), and the like. You may memorize | store using the recording device by a recording medium.

  FIG. 7 is a flowchart of processing for arranging the position of the communication device on the oblique coordinate graph by the framework processing unit of the first embodiment. FIG. 8 is a flowchart of processing for generating and outputting network route design information by the enclosure processing unit according to the first embodiment. FIG. 9 is a diagram illustrating an example of the oblique coordinate graph. The oblique coordinate graph in FIG. 9 is an example of an oblique coordinate graph corresponding to a triangular mesh. One scale on the x-axis and y-axis of the graph is a communicable range (D), and the communicable range (D) is 1 km as shown in FIG.

Before describing the operation of the route design apparatus according to the flowcharts of FIGS. 7 and 8, the features of the wireless ad hoc network design will be described first. The wireless ad hoc network design problem shown in FIG. 1 is different from the wired network design problem of FIG. 2 in the following two points.
(1) Position dependency: The basic assumption when the network model 10 is expressed by the models of the nodes 1, 1S, 1D and the link 2 is that the link 2 can expand and contract like a rubber band and has a topological degree of freedom. This is not the case with radio.
(2) Wireless broadcast: In wired communication, transmission is performed only in one dimension along the link 2, but in wireless, it is performed in a three-dimensional space.

  In order to design a survivable ad hoc network utilizing these characteristics described above, first, in accordance with the communicable range 5 expressed by the node 1 and the sphere instead of the node 1, the node 1S, the node 1D and the link 2 in FIG. Consider the model (Figure 10). FIG. 10 is a diagram illustrating a communicable range 5 in which a radio wave reaches from a node as a sphere. From the source node 1S to the destination node 1D, the route is designed by sequentially setting the next node within the communicable range 5 of each node. For example, in FIG. 10, there is a non-communicable space between the sphere in the communicable range 5 centered on the source node 1S and the sphere in the communicable range 5 centered on the destination node 1D. This incommunicable space is made a communicable space to enable communication between the source node 1S and the destination node 1D. In order to enable communication, the relay node 1 is arranged between the node 1S and the node 1D. Around the arranged relay node 1, a sphere having a communicable range 5 around the relay node 1 is formed.

  Here, in order to facilitate the study, the model of FIG. 10 is simplified. First, the sphere in the communicable range 5 in FIG. 10 is simplified to a two-dimensional circle. Next, the circle is further made into a polygon, and the radius is degenerated to ½ to avoid duplication of the communicable range 5 (FIG. 11). That is, the communication range information (1 kilometer) stored in the communication range information storage unit 55 is generated by reducing the radius to ½. FIG. 11 is a diagram showing a network model in a hexagonal grid by replacing a circle with a polygon, for example, a hexagon, and reducing the communicable range 5 to ½. As a result of reducing the communicable range 5 to ½, our problem is to find the route from the source node 1S to the destination node 1D by following the adjacent polygon on the polygonal grid (FIG. 12). Become. FIG. 12 is a diagram showing an example of a polygonal grid, where (a) is a hexagon, (b) is a quadrangle, and (c) is a triangular grid. In the above description, the sphere is simplified to a circle, and the circle is replaced with a hexagonal polygon. However, when replacing a circle with a polygon, it may be replaced with a rectangle or a triangle in addition to a hexagon. When replaced with a quadrangle, the x-axis and the y-axis intersect at a right angle. The oblique coordinate graph also includes a graph that intersects this right angle.

  In this way, when replacing a circle with a polygon, a polygon or triangle may be used instead of a hexagon as long as it is a polygon that covers the plane without gaps. However, hexagons are often used because they are close to circles reflecting radio wave propagation. In addition, the sides of the quadrangle are straight and easy to handle. Considering the characteristics of each polygon, the designer can decide whether to replace the hexagon, square, or triangle.

  Such planar graph problems are usually solved in graph theory using dual graphs. FIGS. 13 (a), (b), and (c) show dual graph meshes corresponding to the polygonal squares of FIGS. 12 (a), (b), and (c), respectively. Our problem is to obtain a route from the source node 1S to the destination node 1D by following the dual node 1 connected by the mesh indicated by the dotted line in the dual mesh graph of FIG. Here, a dual mesh is defined. A dual mesh is a polygonal grid in which one point (vertical vertex) representing a cell is set in each cell and intersects with the border of the cell only once for the adjacent cell. This mesh is obtained by connecting representative points with straight lines (dual sides). The hexagonal grid dual mesh is a triangular mesh, the quadrilateral square dual mesh is a quadrilateral mesh, and the triangular square dual mesh is a hexagonal mesh.

  In this embodiment, the hexagonal grid in FIG. 12A and the corresponding triangular mesh in FIG. 13A are used. In order to facilitate the description of the problem, the position of the node is indicated by using the oblique coordinate 7 corresponding to the triangular mesh shown in FIG.

  Next, an operation for executing an enclosing algorithm which is a survivable ad hoc network design method by the route design apparatus of the present invention will be described. Our survivable ad hoc network design problem is that when the source node 1S is assigned, as a survivability requirement issue, two or more independent paths are designed between each node in the network model 10, Assume that the minimum cost route in the route is obtained. The constraint condition is to follow a node represented by an adjacent point (“◯” in FIG. 9) on the oblique coordinate in FIG. The minimum cost route is obtained by setting all link costs (one scale in FIG. 9) to 1. In the case of FIG. 13B, the x-axis and the y-axis intersect at a right angle. The oblique coordinate graph also includes a graph that intersects this right angle.

  As described above, the route design apparatus designs a network communication route by two-stage processing including framework processing and enclosure processing. First, the procedure of the framework processing will be described according to the flowchart of FIG. In FIG. 7, the route design device 50 inputs position information 60 indicating the position of each node from the transmission node 40 and the destination node 40 of the network model 10 by the position information input unit 51 (S1, position information input process). . The position information 60 includes, for example, latitude information and longitude information, and represents the position of the node. In the example of FIG. 3, the position information is input from two nodes, that is, the transmission node 40 and the destination node 40, but the position information may be input from two or more nodes. That is, the network model 10 may have, for example, one source node and a plurality of destination nodes. The input position information 60 is output to the framework processing unit 53.

  The framework processing unit 53 generates, for example, the oblique coordinate graph shown in FIG. 9 by the oblique coordinate generation unit 57 (S2, oblique coordinate generation step). At this time, the oblique coordinate generation unit 57 generates one scale for each of the x-axis and the y-axis of the oblique coordinate graph as the communicable range (D) of the communication range information stored in the communication range information storage unit 55. . Here, the reason for using the triangular dual mesh as the oblique coordinate is as described above.

  Next, the framework processing unit 53 obtains a coordinate point on the oblique coordinate 7 of the oblique coordinate graph from the position information of the transmission node 40 input in S1 by the arrangement processing unit 59, and determines the position of the transmission node 40. And place it at the obtained coordinate point. Further, a coordinate point on the oblique coordinate 7 of the oblique coordinate graph is obtained from the position information of the destination node 40 input in S1, and the position of the destination node 40 is arranged at the obtained coordinate point. If the obtained coordinate point is not the vertex of the triangle indicated by the mesh of the oblique coordinate graph, the obtained coordinate point is approximated to the coordinate point of the nearest vertex. In addition, the process of converting latitude information and longitude information into predetermined coordinate points assumes, for example, that the latitude information and longitude information of the source node 40 are coordinates (0, 1) on the oblique graph. The relative distance and angle with respect to the destination node 40 are obtained based on the latitude information and longitude information of the destination node 40, and the coordinate point of the destination node 40 is calculated from the relative distance and angle. At this time, each scale of the x-axis and the y-axis is 1 kilometer according to FIG.

  When the arrangement of the coordinate points is completed, the arrangement processing unit 59 generates a surrounding boundary line that surrounds the arranged coordinate points on the oblique coordinates 7 (S3, arrangement processing step). The processing from S1 to S3 so far is the framework processing. The framework processing is realized by the framework processing unit 53 executing a program stored in the program group 149 of the magnetic disk device 146, for example. The communication range information storage unit 55 is stored in the file group 150 of the magnetic disk device 146. The framework processing unit 53 is a CPU 137. The CPU 137 calls a program for performing framework processing from the program group 149 of the magnetic disk device 146, and performs framework processing of S1 to S3 according to the program.

  Subsequently, the procedure of the enclosing process will be described with reference to FIG. The enclosing algorithm below is an enclosing algorithm. Further, in the process of S3 in FIG. 7, it has been described that the arrangement processing unit 59 performs the process of generating the surrounding boundary line surrounding the arranged coordinate point on the oblique coordinate 7. However, in order to facilitate the explanation, it will be described below as being included in the enclosing process. The actual processing for generating the surrounding boundary line may be performed within the framework processing or within the enclosing processing.

14 and 15 are diagrams for explaining the progress of the execution status of the enclosure algorithm on the oblique coordinate 7 of the oblique coordinate graph. 14 and 15, “●” indicates a source or destination node, “◎” indicates a virtual node, and “◯” indicates a relay node.
FIG. 14 (a)-> Calculate node union 1W = {union of destination node 1D and source node 1S}.
Fig. 14 (b)-> Initial enclosing by the perimeter boundary 3B of the hexagonal zone of the union 1W. 6 boundaries are translated to reduce the range.
FIG. 15A-> Determine a minimum enclosing range including all nodes, and reduce the surrounding boundary line 3B based on the determined minimum enclosing range to generate a reduced surrounding boundary line. Further reduced range.
FIG. 15 (b)-> The reduced peripheral boundary line is further reduced in accordance with predetermined reduction rule information to generate a reduced peripheral boundary line composed of hexagons and associated triangles, and the reduced boundary range is determined. “◎” in FIG. 15B is the virtual node 1V.
FIG. 15 (c)-> Connects a node inside the degenerate peripheral boundary line and the boundary closed circuit with two shortest sides. The boundary cycle is indicated by the surrounding boundary line 3B. It is the solution of the network path designed by the boundary circuit and internal nodes. “◯” in FIG. 15C is the relay node 1R.

FIG. 16 shows a detailed method of degenerating the surrounding boundary line according to the degeneration rule information. Note that the degeneration is performed for each of a plurality of sides of the surrounding boundary line.
When there are two or more nodes (nodes are indicated by “●” in the figure) on the surrounding boundary line 3B in FIG. 16A, the surrounding boundary line is not shifted (degenerated).
FIG. 16B-> If there is only one node on the surrounding boundary line 3B, the surrounding boundary line 3B shifts (degenerates) by one unit (one scale of oblique coordinates), and the nodes on the surrounding boundary line remain as they are. Thus, two virtual nodes 1V are set on the shifted (degenerate) peripheral boundary line 3B.
FIG. 16 (c)-> Connection between the node and the surrounding boundary line 3B is required at least two links and not one link (the “link” here indicates connection between the node and the virtual node).

  The procedure of the enclosure process executed in the process shown in FIGS. 14 and 15 will be described with reference to the flowchart of FIG. In FIG. 8, when the arrangement of the coordinate points is completed, the arrangement processing unit 59 generates a surrounding boundary line that surrounds the arranged coordinate points of the transmission source node and the destination node on the oblique coordinates 7 ( S10, arrangement processing step). This process corresponds to the initial enclosing process shown in FIGS. 14 (a) and 14 (b). As shown in FIG. 14A, here, it is assumed that the network model has three or more nodes including the source node and the destination node. As shown in FIG. 14B, the peripheral boundary line has, for example, a regular hexagonal shape.

  Next, the surrounding boundary reduction unit 73 of the enclosure processing unit 70 translates each of the six sides of the surrounding boundary line 3B to the inside of the surrounding boundary line (S11, surrounding boundary reduction step). By moving each side, the range surrounded by the peripheral boundary line 3B is reduced. This process corresponds to the process of reducing the range by translating the boundary line in FIG. 14B and the process of FIG.

Next, the boundary reduction unit 77 of the enclosure processing unit 70 further reduces the surrounding boundary line 3B that has been translated and reduced (reduced) in accordance with the reduction rule information stored in the reduction rule information storage unit 75 (S12, boundary) Degeneration process). The degeneration rule information stored in the degeneration rule information storage unit 75 causes the degeneration to be performed with the contents shown in FIGS. 16A to 16C, and as described above with reference to FIG.
(1) When there are two or more nodes (the node is indicated by “●” in the figure) on the surrounding boundary line 3B, the surrounding boundary line is not shifted (degenerated).
(2) When there is only one node on the surrounding boundary line 3B, the surrounding boundary line 3B shifts (degenerates) by one unit (one scale of oblique coordinates), and the node on the surrounding boundary line is shifted as it is ( Two virtual nodes 1V are set on the degenerated peripheral boundary line 3B.
(3) Two or more links are required for connection between the node and the surrounding boundary line 3B, and not one link (here, "link" indicates connection between the node and the virtual node).
The boundary degeneration unit 77 is caused to degenerate the surrounding boundary line according to the following rule. This process corresponds to the process of FIG. When the peripheral boundary line 73 reduced by the peripheral boundary reduction unit 73 is reduced according to the above-described reduction rule, the virtual node 1V is arranged as shown in FIG. The condition for arranging the virtual node 1V is when there is only one node on the peripheral boundary line. A portion corresponding to the shaded triangle in FIG. 15B is a portion where the surrounding boundary line is degenerated, and a virtual node 1V (“◎” in the figure) is placed at the apex of this triangle or the apex of the triangular mesh on the side. Is arranged.

  Next, the route design unit 79 of the enclosure processing unit 70 changes the virtual node 1V on the surrounding boundary line 3B, which is degenerated by the boundary degeneration unit 77, to the relay node 1R. Then, a link is generated by connecting the node on the surrounding boundary line and inside the surrounding boundary line and the relay node. The link generation causes each node to generate at least two links. Then, the node position information on the peripheral boundary line, the relay node position information, and the link information are output as route information 80 (S13, route design process). The output destination of the route information 80 is, for example, a transmission node, a destination node, a communication device carried by the route designer, a printer device 187, a LAN 505, a CRT display device 141, a FAX machine 310, or the like. Further, the node position information device may be a coordinate point on the oblique coordinate graph, or a coordinate point converted into latitude information and longitude information. This process is a process corresponding to FIG.

  The processes of S10 to S13 described above are the enclosing process. As described above, the route design device 50 realizes the route design processing by two-stage processing of the framework processing and the enclosing processing. If the source node or destination node of the network model moves and the position is changed, it is necessary to design the route again, and the procedure of FIGS. Ask.

  Next, the validity of the route designed by the route design apparatus will be described in two stages: reduction of the surrounding boundary and connection of internal nodes. First, consider the reduction of the surrounding boundary. Our goal is to connect multiple nodes whose locations that make up the network model in advance are known by two or more independent paths. For this reason, each node needs to be connected to an adjacent node by at least two links. The peripheral boundary line 3B (peripheral boundary closed circuit) in FIG. 15C gives a two-link connection to each node on the closed circuit and is close to the optimum. As a closed circuit connecting as many nodes as possible shown in FIG. 14A by two or more links, it is difficult to think of a completely different circuit from FIG. 15C.

  Next, consider internal nodes. FIG. 15 (c) has a clearly redundant link in a shaded triangle, and it is possible to minimize the cost by deleting one side. However, even if the processing is not performed with increasing complexity, a value close to the optimum is obtained.

  FIG. 17 shows a use form of route design by the route design apparatus 50. FIG. 17A shows a disaster network, and ◎ indicates the relay node 1R. FIG. 17B shows a sensor network such as temperature, and white circles in the figure indicate a destination node 1D that also serves as a relay node. The disaster network sets two routes 3a, 3b and 3c, 3d for each destination node from one source node 1S to two destination nodes 1D, and uses the relay node 1R arranged in the middle of the route as route information. It is possible to use it when presenting it including it.

  In the sensor network, area information 12 indicating an area of a network model in which a source node 1S that centrally manages information, a communicable range 5 of the source node 1S, and a destination node that also serves as a relay node is provided to the route design apparatus. It is done. The area information 12 is, for example, latitude information and longitude information of each of four vertices of a rectangular area. The route design device 50 performs route design assuming that the latitude information and longitude information of each of the four vertices of the area information 12 are the position information of the destination node. The route design device 50 performs the processing of FIGS. 7 and 8 and outputs the location information of the destination node that also serves as the relay node indicated by “◎” in FIG. 17B as route information. If the network designer places the destination node at a location corresponding to the output location information of the destination node, even if a link and a node that cannot be used due to a failure in the predetermined destination node are generated The connection between the nodes is ensured by the route passing through the destination node that also serves as another relay node.

  As described above, the route design apparatus and the route design method described in this embodiment use a network design framework based on a polygon grid, dual graph mesh, and oblique coordinates, so that nodes move and links are determined. Even if not, it is possible to design a plurality of routes connecting the nodes and a relay node. In addition, in order to determine the optimal route strictly, it is a network design that requires enormous processing for verifying the combination of all nodes. However, by enclosing processing by the enclosing processing unit, two or more nodes can be easily connected between all nodes. It is possible to obtain a route connected by a route.

  In this embodiment, an example of a route design apparatus and a route design method having the following characteristics has been described.

  In an ad hoc network, because the nodes move and the wireless link is unstable, there are too many indefinite matters, and the conventional wired communication method cannot efficiently design a plurality of independent routes. However, the route design apparatus and route design method of this embodiment can be realized by using a design framework.

  The framework consists of a polygon grid, dual graph mesh, and oblique coordinates.

  An enclosure algorithm is proposed as a survivable ad hoc network design method using a framework. The feature of the enclosing algorithm is that two or more independent paths are set between all nodes, so enclosing at the boundary, narrowing this, placing as many nodes as possible on the boundary line, and leaving two or more nodes inside The link is to connect with the border frame.

Embodiment 2. FIG.
In this embodiment, an example of a route design apparatus and a route design method that associate communication range information with the intensity of radio waves will be described.

  FIG. 18 is a block diagram illustrating an example of elements constituting the route design apparatus according to the second embodiment. In FIG. 18, the position information input unit 51 includes a radio wave intensity measuring unit 91 that measures the intensity of radio waves when position information is received. Further, as shown in FIG. 19, the communication range information storage unit 55 stores communication range information for storing a communicable range in association with radio wave intensity. Further, the oblique coordinate generation unit 57 receives the radio wave level that is the measurement result measured by the radio wave intensity measurement unit 91, acquires the communicable range corresponding to the radio wave level from the communication range information storage unit 55, and acquires the radio wave level. An oblique coordinate graph is generated with the communicable range corresponding to the radio wave level set as one scale of the x axis and the y axis. The position information input unit 51 inputs a plurality of position information, and each position information may be different from the case where the radio wave level is the same. When the radio wave levels are different, the communication possible ranges corresponding to the radio wave levels may be different. When the communicable ranges are different, for example, an average value of the communicable ranges is calculated, and the average value is used for generating the oblique coordinate graph. The other elements of the route design apparatus 50 are the same as those in FIG. 3 of the first embodiment.

  In the processing procedure of the route design method, S1 and S2 in FIG. In the second embodiment, after receiving the position information of S1 in FIG. 7, the radio field intensity measuring unit 91 measures the radio field intensity of the received position information, and outputs the measured radio wave level to the oblique coordinate generation unit 57. . In S2, the oblique coordinate generation unit 57 acquires the communicable range corresponding to the radio wave level from the communication range information storage unit 55, and sets the communicable range corresponding to the acquired radio wave level on the x axis and the y axis. An oblique coordinate graph with one scale is generated. Processes other than S1 and S2 are the same as those in FIGS. 7 and 8 of the first embodiment.

  As described above, by making the communicable range correspond to the radio wave level, it is possible to design a network route suitable for the actual communication environment.

Embodiment 3 FIG.
In this embodiment, an example of a route design apparatus and a route design method for associating communication range information with a node type will be described.

  FIG. 20 is a block diagram illustrating an example of elements constituting the route design apparatus according to the third embodiment. In FIG. 20, a position information input unit 51 receives position information 61 having node type information for identifying the type of the node that has transmitted the position information. Further, as shown in FIG. 21, the communication range information storage unit 55 stores communication range information for storing a communicable range in association with the type of node. Further, the oblique coordinate generation unit 57 inputs the node type information included in the position information 61, acquires the communicable range corresponding to the node type information from the communication range information storage unit 55, and adds the acquired node type information to the acquired node type information. An oblique coordinate graph is generated with the corresponding communicable range as one scale of the x axis and the y axis. The position information input unit 51 inputs the position information 61 from different types of nodes, and the communicable range corresponding to the type of node may be the same or different. When the communicable ranges are different, for example, an average value of the communicable ranges is calculated, and the average value is used for generating the oblique coordinate graph. The other elements of the route design apparatus 50 are the same as those in FIG. 3 of the first embodiment.

  In the processing procedure of the route design method, S1 and S2 in FIG. In the third embodiment, after receiving the position information 61 of S1 in FIG. 7, the node type information included in the received position information 61 is output to the oblique coordinate generation unit 57. In S2, the oblique coordinate generation unit 57 acquires the communicable range corresponding to the node type information from the communication range information storage unit 55, and uses the acquired communicable range as one scale of the x axis and the y axis. Generate an oblique coordinate graph. Processes other than S1 and S2 are the same as those in FIGS. 7 and 8 of the first embodiment.

  As described above, by making the communicable range correspond to the type of node, it is possible to design a network path that matches the specifications of the communication apparatus that actually configures the network model.

Embodiment 4 FIG.
In this embodiment, an example of a route design apparatus and a route design method for associating communication range information with time will be described.

  FIG. 22 is a block diagram illustrating an example of elements constituting the route design apparatus according to the fourth embodiment. In FIG. 22, the position information input unit 51 receives position information 62 transmitted by including time information indicating the time when the communication device (node) constituting the network model calculates its own position information in the position information. . Alternatively, the time information included in the position information 62 may be positioning time information included in a positioning signal transmitted from a satellite used when calculating its own position, for example. As shown in FIG. 23, the communication range information storage unit 55 stores communication range information for storing a communicable range in association with time. Further, the oblique coordinate generation unit 57 inputs time information included in the position information 62, acquires a communicable range corresponding to the time information from the communication range information storage unit 55, and communicates corresponding to the acquired time information. An oblique coordinate graph is generated with the possible range as one scale of the x axis and the y axis. The position information input unit 51 inputs position information 62 having different time information from a plurality of nodes, and the communicable range corresponding to the time information may be the same or different. When the communicable ranges are different, for example, an average value of the communicable ranges is calculated, and the average value is used for generating the oblique coordinate graph. The other elements of the route design apparatus 50 are the same as those in FIG. 3 of the first embodiment.

  In the processing procedure of the route design method, S1 and S2 in FIG. In the fourth embodiment, after receiving the position information 62 of S1 in FIG. 7, the time information included in the received position information 62 is output to the oblique coordinate generation unit 57. In S2, the oblique coordinate generation unit 57 acquires the communicable range corresponding to the time information from the communication range information storage unit 55, and uses the acquired communicable range as one scale of the x axis and the y axis. Generate a Cartesian graph. Processes other than S1 and S2 are the same as those in FIGS. 7 and 8 of the first embodiment.

  As described above, by making the communicable range correspond to the time, it is possible to design a network route that matches the communication environment at the time when designing the communication route of the network model.

Embodiment 5. FIG.
In this embodiment, an example of a route design device and a route design method in the case where the route design device not only designs a communication route but also itself is a node constituting a network model will be described.

  FIG. 24 is a block diagram illustrating an example of elements constituting the route design apparatus according to the fourth embodiment. In FIG. 24, the route design device 50 includes a positioning receiver 95 that receives a positioning signal transmitted from a geostationary satellite 202, a GPS satellite 203, or a quasi-zenith satellite 204 constituting the satellite group 201 via an antenna 93. Moreover, the position calculation part 97 which calculates a self position from the positioning signal which the positioning receiving part 95 received, and produces | generates self position information is provided. The antenna 93, the positioning receiving unit 95, and the position calculating unit 97 constitute a receiving position calculating unit 94. The framework processing unit 53 inputs the position information 60 from the position information input unit 51 and also inputs its own position information from the position calculation unit 97. The other elements of the route design apparatus 50 are the same as those in FIG. 3 of the first embodiment.

  The processing procedure of the route design method is different from that of the first embodiment in that the processing for calculating its own position is performed between S1 and S2 in FIG. In the fifth embodiment, after receiving the position information of S1 in FIG. 7, the positioning receiving unit 95 receives the positioning signal via the antenna 93, and uses the positioning signal received by the position calculating unit 97 to determine its own position. Processing to calculate information is performed. In S3, the arrangement processing unit 59 inputs its own position information from the position calculation unit 97, converts it into coordinate points on the oblique coordinate graph, and arranges its own position on the oblique coordinate graph. Processes other than S1 and S3 are the same as those in FIGS. 7 and 8 of the first embodiment. Further, the communicable range can correspond to the radio wave intensity, the node type, and the time as in the second to fourth embodiments.

  As described above, the route design apparatus can also serve as a node constituting the network model.

Embodiment 6 FIG.
In this embodiment, an example of route design of an ad hoc network will be described using a two-layer network model.
FIG. 25 is a diagram illustrating a model of a two-layer structure of the ad hoc network according to the sixth embodiment. As shown in FIG. 25, the network model 10 of the sixth embodiment has a two-layer structure of a network layer composed of the flying station 1a and a network layer composed of the ground station 1g. The flying body station 1a is a wireless communication terminal device mounted on a flying body such as an aircraft, for example, and performs relaying for ensuring communication (connectivity) between ground stations 1g arranged over a wide area. . The flying station 1a is connected by a wireless link 2a. The ground station 1g is a mobile radio communication device, and the ground stations 1g are connected by a radio link 2g. Each ground station 1g between two points is connected by two ground station paths 3Hg. Each flying station 1a between two points is connected by two flying station paths 3Ha. The flying station 1a has a communicable range 5aL. When the communicable range of the flying station 1a is projected to the ground, it becomes a projection 5aR to the network layer composed of the ground station 1g. The air vehicle station 1a has a vertical height H from the ground. In other words, the plane of the network layer composed of the flying station 1a is perpendicular to the plane of the network layer composed of the ground station 1g, and the plane height of the network layer composed of the ground station 1g is H. Have.
Here, the identification of the code will be described. In the network model 10, a thing related to the ground station is indicated with a suffix g, and a thing related to the flying station is indicated with a suffix a. The network layer is distinguished by the subscripts g and a in the sixth and subsequent embodiments. When attention is paid to the mutual connection relationship between the ground station and the flying station, the communication device is called a node, and each connection between the nodes is called a link. The route design apparatus designs a network route that combines the ground-station-to-ground route 3Hg and the flying-station-to-station route 3Ha indicated by a broken line in FIG. In the network model 10 of FIG. 25, when communication is performed between the ground stations 1g, the ground station 1g is arranged over a wide area, and it is difficult to secure a communication path only by mutual communication between the ground nodes (communication) Reasons why it is difficult to secure the route include, for example, the range of communication is narrow and radio waves do not reach the nearest ground node, or there are high mountains between ground nodes, and radio waves are blocked and do not reach ), A wide-area communication path is provided by relaying at the flying station 1a. At this time, not only a single communication path is secured, but a plurality of independent paths are designed to ensure survivability.

  FIG. 26 is a diagram illustrating a two-layer network model used in the network design method according to the sixth embodiment. The ground station network model 10g is represented by a ground layer mesh (polygonal grid) 4g in which a plurality of polygons, for example, a plurality of regular hexagons are arranged adjacent to each other. The network model 10a of the flying object station is represented by an aviation layer mesh (polygonal grid) 4a in which a plurality of polygons, for example, a plurality of regular hexagons are arranged adjacent to each other. The ground station 1g has a communicable range Dg (first communicable range), and the flying station 1a has a communicable range Da (second communicable range). The relationship between the communicable range Dg and the communicable range Da is such that the communicable range Dg <communicable range Da, and the coverage of the flying station is wider than the communicable range of the ground station, Routes between ground stations that cannot be directly connected are connected via the flying station. A ground station or a flying station is arranged at the center point of the regular hexagon, and the distance from the center point to the side of the polygon is a distance obtained by reducing each communicable range by half. As described in the first embodiment, the regular hexagon indicates a communicable range in which radio waves reach from a node as a sphere (FIG. 10), and then the sphere is simplified to a two-dimensional circle. This is replaced with a regular hexagon (FIG. 11). As described in the first embodiment, the radius of the circle is reduced to ½ of the communicable range in order to avoid duplication of communicable ranges when simplifying the sphere into a two-dimensional circle. That is, between the adjacent ground stations 1g is the communicable range Dg, and the length from the center point of the regular hexagon to the side of the regular hexagon has a distance obtained by reducing the communicable range Dg by 1/2. Further, the communication range Da is between the adjacent air station 1a, and the length from the center point of the regular hexagon to the side of the regular hexagon has a distance obtained by reducing the communication range Da by 1/2. . Next, the mesh dotted line in FIG. 26 will be described. This mesh dotted line shows a dual graph. This dotted line connects the center points of adjacent regular hexagons with a line passing through the sides of the regular hexagon. Since one center point is connected to a plurality of other center points, a large number of lines are generated to form a mesh. The dual graph mesh 6g of the ground station and the dual graph mesh 6a of the flying vehicle station are generated in this way.

  These dual graph meshes correspond to the oblique coordinate 7 of FIG. Since the dual station mesh 6g of the ground station and the dual graph mesh 6a of the flying station have different communicable ranges between the ground station and the flying station, the size of one mesh of the mesh is different.

FIG. 27 is a block diagram showing an example of elements constituting the route design apparatus of this embodiment. In FIG. 27, elements denoted by the same reference numerals as those in FIG. 3 of the first embodiment operate in the same manner. Although there are portions overlapping with the description of FIG. 3, each element of FIG. 27 will be described.
In FIG. 27, the route design apparatus 50 includes a position information input unit 51 that receives position information 60 having at least latitude information and longitude information from a node 40 that is a ground station constituting the network model 10g of the ground station. Also, the framework processing unit 53 that mainly generates the first graph and the second graph, and the degeneration rule information indicating the rules for setting the relay node in the network design, the network of the ground station and the aircraft station An enclosure processing unit 70 is provided for designing each of the network model path of the ground station and the network model path of the flying object station. Also, from the ground station network model and the aircraft station network model, these models are merged to generate network path information that partially connects the connections between the ground stations via the aircraft station. An output route information fusion unit 78 (second route design unit) is provided.

The framework processing unit 53 includes a communication range information storage unit 55, a ground layer oblique coordinate generation unit 57g that is a first graph generation unit, a ground layer arrangement processing unit 59g that is a first arrangement processing unit, A cluster generation unit 58 including a multi-hop adjacent node area generation unit 581 that is a generation unit and an area union generation unit 582 that is an area classification unit; an aerial layer oblique coordinate generation unit 57a that is a second graph generation unit; And an aviation layer arrangement processing unit 59a which is a second arrangement processing unit.
The enclosure processing unit 70 includes a surrounding boundary reduction unit 73, a reduction rule information storage unit 75, a boundary reduction unit 77, and a route design unit 79 that is a first route design unit.

The communication range information storage unit 55 stores the distance indicating the communicable range of the node 40 as the first communication range information. Further, the distance indicating the communicable range of the flying object station is stored as second communication range information.
The ground layer oblique coordinate generation unit 57g generates a ground layer oblique coordinate graph having the first communicable range as one scale.
The aviation layer oblique coordinate generation unit 57a generates a ground layer oblique coordinate graph having the second communicable range as one scale.

Based on the position information 60, the ground layer placement processing unit 59g places the coordinate points corresponding to the plurality of nodes 40 on the ground layer oblique coordinate graph.
The cluster generation unit 58 divides each coordinate point corresponding to the plurality of nodes 40 arranged on the ground layer oblique coordinate graph into a plurality of clusters according to conditions described later.
The multi-hop adjacent node area generation unit 581 generates a multi-hop adjacent area of each node, and the area union generation unit 582 generates a union of multi-hop adjacent areas and includes the ground included in each cluster for each cluster. A surrounding boundary line surrounding the station is generated on the ground layer oblique coordinate graph. Information on a plurality of surrounding boundary lines generated on the ground layer oblique coordinate graph is output to the ground layer arrangement processing unit 59g. Information on a plurality of surrounding boundary lines generated on the ground layer oblique coordinate graph and information indicating the ground layer oblique coordinate graph (for example, information for developing the oblique coordinate 7 in FIG. 9) include an aviation layer. The data is output to the arrangement processing unit 59a.

  The aviation layer arrangement processing unit 59a generates information on the ground layer oblique coordinate graph (for example, information for developing the oblique coordinate 7 in FIG. 9) from the cluster generation unit 58 and the ground layer oblique coordinate graph. The origin of the aerial layer oblique coordinate graph is arranged within the range of the surrounding boundary line of one cluster among the plurality of clusters on the ground layer oblique coordinate graph. As shown, the aerial layer oblique coordinate graph is arranged with respect to the ground layer oblique coordinate graph. In addition, the aviation layer oblique coordinate graph has the height H shown in FIG. 25 in a direction perpendicular to the surface of the terrestrial layer oblique coordinate graph with respect to the terrestrial layer oblique coordinate graph. Place. Then, the surrounding boundary line of each cluster on the ground layer oblique coordinate graph is projected on the aviation layer oblique coordinate graph, and the flying station corresponding to each cluster is within the range of the projected surrounding boundary line for each cluster. Decide the coordinates to place. For example, on the aviation layer oblique coordinate graph, there are points where dotted lines arranged in a mesh shape intersect as shown in FIG. This point is the center point of a regular hexagon and is called “vertex”. The vertices included in the range of the peripheral boundary line for each cluster projected on the aerial layer oblique coordinate graph are set as coordinate points at which the flying station corresponding to each cluster is arranged. In addition, a surrounding boundary line surrounding the coordinate point where the flying station corresponding to each cluster is arranged is generated on the aviation layer oblique coordinate graph and passed to the enclosing processing unit 70.

  The enclosure processing unit 70 is commonly used in the ground layer and the aviation layer. The surrounding boundary reduction unit 73 moves the surrounding boundary line on the ground layer oblique coordinate graph to the inside of the surrounding boundary line, and reduces the reduced surrounding boundary line that encloses the surrounding boundary line to the ground layer oblique coordinate graph. Generate on top. In addition, the surrounding boundary reduction unit 73 moves the surrounding boundary line on the aviation layer oblique coordinate graph to the inside of the surrounding boundary line, and reduces the reduced surrounding boundary line that encloses the surrounding boundary line to the aviation layer oblique direction. Generate on the coordinate graph.

  The degeneration rule information storage unit 75 arranges virtual communication devices on the reduced peripheral boundary line on the aviation layer oblique coordinate graph and the inner side on the ground layer oblique coordinate graph, respectively, and reduces the reduced periphery that passes over the virtual communication device. Stored is degeneration rule information indicating a rule for generating a degenerate peripheral boundary line in which the boundary line is degenerated. The degeneration rule information may be common or different for the aviation layer oblique coordinate graph and the ground layer oblique coordinate graph. If they are different, identification information for identifying whether the air layer is used or the ground layer is included in the degeneracy rule information.

  The boundary degeneration unit 77 arranges the virtual communication device inside the reduced peripheral boundary line on the aviation layer oblique coordinate graph according to the degeneration rule information stored in the degeneration rule information storage unit 75, The reduced peripheral boundary line is reduced so as to pass through the virtual communication device arranged inside the reduced peripheral boundary line, and the reduced peripheral boundary line is generated on the aerial layer oblique coordinate graph. Further, according to the degeneration rule information stored in the degeneration rule information storage unit 75, the virtual communication device is arranged inside the reduced peripheral boundary line on the ground layer oblique coordinate graph, and the reduced peripheral boundary on the ground layer oblique coordinate graph The reduced peripheral boundary line is reduced so as to pass through the virtual communication device arranged inside the line, and the reduced peripheral boundary line is generated on the ground layer oblique coordinate graph.

  The route design unit 79 uses the degenerate peripheral boundary line on the ground layer oblique coordinate graph generated by the boundary degeneration unit 77, the coordinate point of the node 40, and the position on the ground layer oblique coordinate graph of the virtual communication device. The position on the network model of the ground station where the relay node is arranged is determined, the network route of the network model of the ground station is designed, and the route information of the ground station is generated and output. In addition, the route design unit 79 also includes a degenerate peripheral boundary line on the airline layer oblique coordinate graph generated by the boundary degeneration unit 77, a coordinate point where the flying station is arranged, and an airline layer oblique coordinate graph of the virtual communication device. The position on the network model of the air vehicle station where the relay node is arranged is determined from the position of the air station, and the network path of the network model of the air vehicle station is designed to generate and output the air station route information.

  Based on the ground layer route information and the aviation layer route information, the route information fusion unit 78 generates network route information for connecting between the clusters that cannot be connected only by the ground station via the flying station in the ground layer. .

The processing contents will be described using FIGS. 28 to 32 according to the flowchart showing the processing procedure of the route design apparatus of FIG.
FIG. 28A is a diagram illustrating an example in which the ground layer placement processing unit places ground stations on the ground layer oblique coordinate graph. FIG. 28B is a diagram illustrating an example in which the cluster generation unit classifies the ground stations on the ground layer oblique coordinate graph into a plurality of clusters.
FIG. 29 is a diagram illustrating an example in which an aerial layer oblique coordinate graph is arranged with respect to a ground layer oblique coordinate graph.
FIG. 30 is a diagram illustrating an example in which the surrounding boundary line for each cluster on the ground layer oblique coordinate graph is projected on the air layer oblique coordinate graph.
FIG. 31 (a) is a diagram showing an example in which a flying station corresponding to each cluster is arranged on the aviation layer oblique coordinate graph. FIG. 31B is a diagram illustrating an example of a degenerate peripheral boundary line in which virtual nodes are arranged on the ground layer oblique coordinate graph.
FIG. 32 is a diagram illustrating an example of a degenerate peripheral boundary line in which virtual nodes are arranged on an aerial layer oblique coordinate graph.

  In FIG. 33, position information 60 indicating the position of each node is input by the position information input unit 51 from a plurality of nodes 40 of the ground station network model 10g (S1, position information input step). The position information 60 includes latitude information and longitude information, and represents the position of the node. The input position information 60 is output to the framework processing unit 53.

  The framework processing unit 53 generates, for example, the oblique coordinate graph shown in FIG. 9 by the ground layer oblique coordinate generation unit 57g (S2g, ground layer oblique coordinate generation step).

Here, the oblique coordinate generation procedure will be described. This procedure is common to the procedure of generating the ground layer oblique coordinate graph and the procedure of generating the aviation layer oblique coordinate graph. However, when generating an aerial layer oblique coordinate graph, the second communication range information is used instead of the first communication range information.
First, the polygon is a regular hexagon. The reason for the regular hexagon is that, as described in the first embodiment, the hexagon is close to a circle reflecting radio wave propagation. A plurality of regular hexagons are arranged adjacent to each other by sharing a regular hexagonal side. At this time, in each regular hexagon, the length of the vertical line from the center point to the side is set to ½ of the first communication range information. FIG. 12A is a diagram in which a plurality of regular hexagons are arranged adjacent to each other as described above. Next, the center points of the regular hexagons are connected by a line passing through the sides of the regular hexagon. FIG. 13A shows a line connecting the center points of the regular hexagon. As shown in FIG. 13, there can be a plurality of lines connecting the center points. An x-axis line and a y-axis line are selected from the plurality of lines, respectively, and an oblique coordinate graph is generated with the selected lines as the x-axis and the y-axis. An example of the generated oblique coordinate graph is the oblique coordinate 7 in FIG. The x-axis indicates a value obtained by converting longitude information into distance among node position information. The y-axis indicates a value obtained by converting latitude information into distance among node position information. It can be seen from FIG. 11 that one scale on each of the x-axis and the y-axis is the first communicable range. The ground station network model 10g shown in FIGS. 28 to 32 shows a part of the ground layer oblique coordinate graph, and the aircraft station network model 10a shows a part of the aviation layer oblique coordinate graph. It is a thing.

Next, the framework processing unit 53 obtains a coordinate point on the ground layer oblique coordinate graph from the position information of the node 40 input in S1 by the ground layer placement processing unit 59g, and sets the node 40 to the obtained coordinate point. Arrange (S3g, ground layer arrangement processing step). The ground station 1g indicated by ● in FIG. If the obtained coordinate point is not an intersection (called a vertex) where the dotted lines on the ground layer oblique coordinate graph intersect, the obtained coordinate point is approximated to the coordinate point of the nearest vertex.
Here, an example of obtaining the coordinate point from the position information of the node 40 will be described. FIG. 43 is a diagram illustrating an example of obtaining coordinate points from position information. The distance for 1 degree longitude becomes shorter as it is closer to the pole, and there are subtle differences when taking into account various elements such as the earth is not a true sphere and the surface is not a sphere. The distance for each latitude is about 111 km. For example, as shown in FIG. 43, it is assumed that the position information of node A is (east longitude 139 degrees, north latitude 35 degrees) and the node B position information is (east longitude 140 degrees, latitude 36 degrees). 43. A graph 431 having the origin of the position information of node A (139 degrees east longitude and 35 degrees north latitude) as shown in FIG. ). Next, what is developed at the longitude and latitude is developed into orthogonal coordinates as shown in FIG. At this time, the x-axis of the orthogonal coordinates indicates the east longitude direction, one scale is 11.1 km, the y-axis indicates the latitude direction, and one scale is 11.1 km. Since node A is the origin, the coordinates are (0, 0), and node B has a difference of 1 degree in both latitude and longitude from node A, so the coordinates of node B are (10, 10). Next, what is developed in the orthogonal coordinates is developed in the oblique coordinate graph of the ground layer. Since the oblique coordinate graph of the ground layer is a graph generated based on a hexagon, the inclination of the y axis with respect to the x axis is 60 degrees. For this reason, trigonometric functions are used for expansion to oblique coordinates. The coordinates of node A in the orthogonal coordinates of FIG. 43 are (0, 0), and the coordinates of node B are (10, 10). When these coordinates are converted using a trigonometric function, node A is the origin on the oblique coordinate graph (graph 435) of the ground layer as shown in development 434 to oblique coordinates in FIG. The coordinate point remains unchanged (0,0), and the coordinates of node B are (10-10 / √3, 10 × 2 / √3), that is, (10 × (1-1 / √3), 20 / √3) When this is approximated by a decimal number, it is (4.2, 11.6), and when it is approximated by an integer, it is (4, 12).
At this time, the x axis of the oblique coordinate graph of the ground layer indicates the east longitude direction, and the y axis indicates a direction 30 degrees from the north latitude direction. In this manner, the ground layer placement processing unit 59g converts the position information of the node into coordinate points on the oblique coordinate graph of the ground layer, and places them on the oblique coordinate graph of the ground layer.

  Returning to FIG. In S3g of FIG. 33, the ground layer arrangement processing unit 59g obtains coordinate points on the ground layer mesh 7g corresponding to the positions of the eight ground stations as shown in FIG. Is arranged on the ground layer mesh 7g as ● and a network model 10g of the ground station is generated.

  Next, in S4g, the cluster generation unit 58 divides the eight ground stations 1g on the ground layer mesh 7g into a plurality of clusters, and sets a surrounding boundary line surrounding the ground stations included in the cluster for each of the clusters. Generate on layer mesh 7g.

An example of the operation of the cluster generation unit 58 will be described with reference to FIGS. 35, 36, and 37. FIG. 35 is a diagram for explaining multihop. FIG. 36A is a diagram showing a node range (area) of each ground station when the number of hops is 1, and FIG. 36B is a diagram of each node of the ground station when the number of hops is 2. It is a figure which shows a range (area). FIG. 37 shows the cluster generation processing S4g by the cluster generation unit 58.
In FIG. 37, the multi-hop adjacent node area generation unit 581 of the cluster generation unit 58 generates a multi-hop adjacent area having the maximum number of hops designated for each ground station (S20, multi-hop adjacent node area generation step). This multi-hop adjacent area refers to, for example, adjacent node ranges 1NB1, 1NB2, and 1NB3 in FIG. The adjacent node range 1NB1 indicates a range from a central ground station 1C to a plurality of 1-hop adjacent nodes at a distance of one scale (1 hop number). The adjacent node range 1NB2 indicates a range from the ground station 1C to a plurality of 2-hop adjacent nodes at a distance of 2 scales (hop count 2). The adjacent node range 1NB3 indicates a range from a ground station 1C to a plurality of 3-hop adjacent nodes at a distance of 3 scales (hop count 3). FIG. 36 shows a multi-hop adjacent area generated by the multi-hop adjacent node area generating unit 581 for each ground station. FIG. 36 (a) shows adjacent node ranges generated for each of the six ground stations when the number of hops is one. FIG. 36B shows adjacent node ranges generated for each of the six ground stations when the number of hops is two. In FIG. 36A, the neighboring node is not included in the one-hop adjacent node range 1NB1 of the other nodes. In one hop, each node does not include other nodes and is independent. FIG. 36B shows the 2-hop adjacent node range 1NB2 of each node. In FIG. 36 (b), neighboring nodes are included in the 2-hop adjacent node range 1NB2 of other nodes. This indicates that a cluster including a plurality of nodes can be generated with 2 hops. Therefore, the cluster generation unit 58 includes a classification condition storage unit that stores the number of hops as 2. Based on the hop count “2” stored in the classification condition storage unit, the multihop adjacent node area generation unit 581 An adjacent node range for each station is generated.

  The area union generation unit 582 of the cluster generation unit 58 takes the union of areas including other nodes among the multi-hop adjacent node areas, and sets the resulting union as one cluster, and a plurality of ground stations as a plurality of clusters. (S21, area union generation process). For example, when the multi-hop adjacent node area generation unit 581 generates the adjacent node range with the hop count being 2, the adjacent node range 1NB2 including the six nodes 1 in FIG. 36B is generated. The area union generation unit 582 of the cluster generation unit 58 generates the six adjacent node ranges 1NB2 in FIG. 36B as the union of adjacent node ranges as a union of areas including other nodes. One of the union of generated adjacent node ranges corresponds to one cluster. In this way, the cluster generation unit 85 classifies the plurality of nodes 1 on the oblique coordinate 7 of the ground layer mesh into clusters.

  The cluster generation unit 58 sets eight ground stations 1g arranged on the ground layer mesh 7g in FIG. 28A as the number of hops 1 (the cluster generation unit 58 stores a classification condition for storing the number of hops “1”). Are divided into a plurality of clusters, and two clusters 21 are generated as shown in FIG. Then, for each of the two clusters 21, surrounding boundary lines included in the cluster are generated on the ground layer mesh 7g. The operation of generating the peripheral boundary line for each cluster is the same as S10 in FIG. 8 and the arrangement processing unit 59 in FIG. 3 described in the first embodiment. As shown in FIG. 29, the cluster generation unit 58 generates a surrounding boundary 3Bg of the ground layer on the ground layer mesh 7g for each cluster.

  Next, the aviation layer arrangement processing unit 59a arranges the aviation layer corresponding to the ground layer, and arranges the flying station corresponding to each cluster in the arranged aviation layer (S3a, aviation layer arrangement processing step). First, the aviation layer arrangement processing unit 59a, from the cluster generation unit 85, information that can develop the oblique coordinate graph of the ground layer, the coordinate points of a plurality of ground stations arranged on the oblique coordinate graph of the ground layer, and In addition, information on ground stations included in each cluster and information indicating peripheral boundaries of the plurality of ground layers on the oblique coordinate graph of the ground layer are input. In addition, the aviation layer arrangement processing unit 59a inputs information that can develop the aviation layer oblique coordinate graph from the aviation layer oblique coordinate generation unit 57a. Then, one cluster is selected from the input information indicating the plurality of clusters. For this cluster selection, for example, when the position information input unit 51 inputs the position information of the ground station, the cluster including the ground station with the strongest radio wave is selected. Alternatively, for example, when each member of a unit carries a communication terminal device that is a ground station, a cluster including the communication terminal device carried by the captain may be selected. In this case, identification information of the communication terminal device of the captain is stored in the route design device 50 in advance, and identification information of the communication terminal device is input together with the position information. The input identification information of the communication terminal device is included in the information of the ground station included in each cluster and received by the aviation layer arrangement processing unit 59a. The aviation layer arrangement processing unit 59a selects a cluster including a communication terminal device that matches the stored identification information of the communication terminal device of the captain from the identification information of the communication terminal device included in the ground station information included in each cluster. .

  The aviation layer arrangement processing unit 59a sets the plane of the aviation layer oblique coordinate graph so that the origin of the aviation layer oblique coordinate graph is arranged within the range surrounded by the surrounding boundary line of one cluster selected in this way. They are arranged in parallel with a height H in the direction perpendicular to the plane of the ground layer oblique coordinate graph. For example, as shown in FIG. 29, the coordinate point of one ground station 100g included in the range surrounded by the peripheral boundary of one selected cluster and the origin 100a of the aerial layer oblique coordinate graph are matched. At this time, the aviation layer mesh 7a (surface of the aviation layer oblique coordinate graph) is arranged in parallel to the ground layer mesh 7g (surface of the terrestrial layer oblique coordinate graph). Further, the aviation layer mesh 7a (surface of the aviation layer oblique coordinate graph) is arranged so as to have a height H in the vertical direction of the ground layer mesh 7g (surface of the terrestrial layer oblique coordinate graph). The height H is, for example, an altitude from the ground of an aircraft equipped with a wireless communication terminal device that is a flying station, and the altitude is a distance that does not exceed the distance indicated by the communicable range of the flying station.

  Next, the operation of arranging the flying station on the aviation layer mesh 7a corresponding to each cluster will be described by taking the network model 10 shown in FIG. 29 as an example. The aviation layer arrangement processing unit 59a projects a line indicating the cluster range of the cluster 21 on the right side of the ground layer mesh 7g in FIG. 29 or a surrounding boundary line of the cluster onto the aviation layer mesh 7a. Here, as shown in FIG. 30, the surrounding boundary line 3Bg of the ground layer of the cluster 21 on the right side of FIG. 29 is projected. With respect to the cluster on the left side of FIG. 29, since the flying station for this cluster is arranged at the origin 100a of the aerial layer oblique coordinate graph, the process of projecting a line indicating the cluster range or a boundary line around the cluster is not performed. . The aviation layer arrangement processing unit 59a is a vertex within the range surrounded by the projected peripheral boundary line (a vertex is a point where lines forming the mesh intersect with each other. For example, a dotted line of the aviation layer mesh 7a in FIG. 30) Is the coordinate point where the flying station is located. In FIG. 30, the coordinate point 101a is the position where the flying station 1a is placed. The coordinate point 101a is a coordinate point where a flying station corresponding to the cluster on the right side of the ground layer mesh 7g in FIG. 30 is arranged. FIG. 31 (a) shows the coordinate points of the flying station 1a arranged on the aviation layer mesh 7a corresponding to the two clusters 21 on the ground layer mesh. The aviation layer arrangement processing unit 59a generates, in the aviation layer mesh 7a, a surrounding boundary line that surrounds the two coordinate points where the flying station on the aviation layer mesh 7a is arranged. The process of generating the peripheral boundary line is the same as S10 of FIG. 8 and the arrangement processing unit 59 of FIG. 3 described in the first embodiment.

  The processes of S2g to S4g and S2a and S3a of FIG. 33 described so far are the framework processes by the framework processing unit 53. The framework processing is realized by the framework processing unit 53 executing a program stored in the program group 149 of the magnetic disk device 146, for example. The communication range information storage unit 55 and the classification condition storage unit are stored in the file group 150 of the magnetic disk device 146. The framework processing unit 53 is a CPU 137. The CPU 137 calls a program for performing the framework processing from the program group 149 of the magnetic disk device 146, and performs the framework processing of S2g to S4g, S2a, and S3a according to the program.

  Subsequently, the route design device 50 will explain the procedure of the enclosing process of S5g and S5a in FIG. FIG. 34 shows the detailed procedure of the enclosing process of S5g and S5a. The processing contents of S10 to S13 shown in FIG. 34 are the same as the processing contents of S10 to S13 of FIG. 8 described in the first embodiment. The process of generating the peripheral boundary line in S10 includes the process of generating a peripheral boundary line for each cluster in the ground layer mesh 7g by the cluster generation unit 58 in S4g, and the process of generating the peripheral boundary line in the air layer mesh processing process 59a in S3a. Refers to the process of generating a boundary line. However, the process for generating these surrounding boundary lines may be included in the enclosing process. In this case, the cluster generation unit 58 and the aviation layer arrangement processing unit 59a are shared by the framework processing unit 53 and the enclosure processing unit 70. In addition, the processing of S11 for reducing the range by translating the peripheral boundary lines generated respectively on the ground layer mesh 7g and the aviation layer mesh 7a for each layer mesh, and the reduced peripheral boundary The process of S12 for degenerating the line and the process of generating the route design information including the relay node by changing the virtual node to the relay node are separately performed for the ground station network model and the aircraft station network model. To do. In other words, the surrounding boundary reduction unit 73 has information that can develop the oblique coordinate graph of the ground layer as information related to the network model of the ground station, and a plurality of information arranged on the oblique coordinate graph of the ground layer. The coordinates of the ground station, the information indicating the plurality of clusters and the ground stations included in each cluster, and the information indicating the surrounding boundary lines of the plurality of ground layers on the oblique coordinate graph of the ground layer are input. And the information that can develop the oblique coordinate graph of the ground layer from the input information, the coordinate points of the plurality of ground stations arranged on the oblique coordinate graph of the ground layer, and the plurality of clusters Information on ground stations included in the cluster, information indicating a plurality of surrounding boundary lines of the ground layer on the oblique coordinate graph of the ground layer, and a plurality of reduced surrounding boundary lines obtained by reducing the plurality of surrounding boundary lines of the ground layer, respectively Is output. Further, the surrounding boundary reduction unit 73 has information that can develop an aerial layer oblique coordinate graph as information related to the network model of the flying station, and a plurality of flights arranged on the oblique coordinate graph of the aviation layer. The coordinate point of the body station and information indicating the peripheral boundary line of the aviation layer on the oblique coordinate graph of the aviation layer are input. Information that can be used to develop an aerial layer oblique coordinate graph from the input information, coordinate points of a plurality of aircraft stations arranged on the aerial layer oblique coordinate graph, and peripheral boundaries of the aviation layer Is output on the oblique coordinate graph of the aviation layer, and a plurality of reduced peripheral boundaries obtained by reducing the peripheral boundaries of the aviation layer.

  In addition, the boundary degeneration unit 77 has information that can develop the oblique coordinate graph of the ground layer as information related to the ground network model, and the coordinates of a plurality of ground stations arranged on the oblique coordinate graph of the ground layer. Information indicating a point, a plurality of clusters and ground stations included in each cluster, and information indicating the reduced peripheral boundary lines of the plurality of ground layers on the oblique coordinate graph of the ground layer are input. Then, the information that can develop the oblique coordinate graph of the ground layer from the input information, the coordinate points of the plurality of ground stations and virtual nodes arranged on the oblique coordinate graph of the ground layer, and the plurality of clusters In addition, the information on the ground stations included in each cluster and the plurality of reduced peripheral boundary lines of the ground layer are output according to the reduction rule information stored in the reduction rule information storage unit 75, respectively. Further, the boundary degeneration unit 77 includes information that can develop an oblique coordinate graph of the aviation layer as information related to the network model of the flying station, and a plurality of flights arranged on the oblique coordinate graph of the aviation layer. A coordinate point of the body station and information indicating the reduced peripheral boundary line of the aviation layer on the oblique coordinate graph of the aviation layer are input. The information that can be used to develop the oblique coordinate graph of the aviation layer from the input information, the coordinate points of a plurality of aircraft stations and virtual nodes arranged on the oblique coordinate graph of the aviation layer, and the aviation layer Each of the reduced surrounding boundary lines is output as a reduced surrounding boundary line that has been reduced according to the reduction rule information stored in the reduction rule information storage unit 75. The degeneration rule information stored in the degeneration rule information storage unit 75 stores one degeneration rule information, and the boundary degeneration unit 77 uses the same degeneration rule information in each of the ground network model and the aviation network model according to the respective degeneration rule information. Degenerate the line. Alternatively, different degeneration rule information is stored for the ground station network model and the flying station network model, and the boundary degeneration unit 77 is used for each of the ground station network model and the flying station network model. The demarcation boundary line is degenerated according to the degeneration rule information.

  FIG. 31B is a diagram showing an example in which virtual nodes 1Vg and 1Va are arranged on the ground layer mesh 7g of the network model 10g of the ground station and on the air layer mesh 7a of the network model 10a of the aircraft station according to the degeneration rule information. It is. As shown in FIG. 31 (b), by arranging the virtual node 1Va, the two aircraft stations 1a are connected by two links.

  The route design unit 79 indicates information that can develop an oblique coordinate graph of the ground layer, coordinate points of a plurality of ground stations and virtual nodes arranged on the oblique coordinate graph of the ground layer, and a plurality of clusters. In addition, information on ground stations and virtual stations included in each cluster, and a plurality of reduced peripheral boundary lines of the ground layer, respectively, are input as a plurality of reduced peripheral boundary lines that are reduced according to the reduction rule information stored in the reduction rule information storage unit 75. To do. And, from these input information, information that can develop the oblique coordinate graph of the ground layer, the coordinate points of a plurality of ground stations and relay nodes arranged on the oblique coordinate graph of the ground layer, and a plurality of In addition to indicating a cluster, information on ground stations and relay stations included in each cluster, a plurality of degenerate surrounding boundary lines in the ground layer, and information indicating a link between the ground station and the relay node are output. Further, the route design unit 79 includes information that can develop an oblique coordinate graph of the aviation layer, coordinate points of a plurality of flying stations and virtual nodes arranged on the oblique coordinate graph of the aviation layer, an aviation layer Each of the reduced peripheral boundary lines is input as a reduced peripheral boundary line that is reduced according to the reduction rule information stored in the reduction rule information storage unit 75. Then, from these input information, information that can develop an oblique coordinate graph of the aviation layer, coordinate points of a plurality of flying stations and relay nodes arranged on the oblique coordinate graph of the aviation layer, The degenerate peripheral boundary line of the layer and information indicating the link between the flying station and the relay node are output.

Taking FIG. 31 (b) as an example, the route design unit 79 has information that can develop the ground layer mesh 7g and the aviation layer mesh 7a, information indicating two clusters on the ground layer mesh, and , Information indicating the coordinate point of the ground station 1g, the coordinate point of the virtual node 1Vg, and the degenerate peripheral boundary line included in each cluster, the coordinate point of the flying station 1a on the aviation layer mesh, and the coordinate of the virtual node 1Va Information indicating the point and the degenerate surrounding boundary line is output.
As described above, each component of the enclosure processing unit 70 performs two processes, that is, a process for the ground station network model and a process for the airframe network model.

  Returning to FIG. In S6 of FIG. 33, the route information fusion unit 78 inputs information on the ground station network model and route information 80P on the aircraft station network model. For example, as information related to the network model of the ground station, information that can develop the oblique coordinate graph of the ground layer, coordinate points of a plurality of ground stations and relay nodes arranged on the oblique coordinate graph of the ground layer, Information indicating a plurality of clusters and information on ground stations and relay stations included in each cluster, a plurality of degenerate surrounding boundary lines in the ground layer, and information indicating a link between the ground station and the relay node are input. In addition, as information about the network model of the air station, information that can develop an oblique coordinate graph of the air layer, and coordinate points of a plurality of air stations and relay nodes arranged on the oblique coordinate graph of the air layer And a degenerate peripheral boundary line of the aviation layer and information indicating a link between the flying station and the relay node. And from these input information, it connects between two clusters of the network model of a ground station via the network model of a flying body station. The connection through the network model of the flying object station means that, for each cluster, the flying object station corresponding to each cluster and the ground station included in the cluster are linked and connected. For example, taking the network model 10 of FIG. 32 as an example, a network path for connecting a ground station network model and a flying station network model to a plurality of clusters of the ground station network model via the flying station network model. Information generation will be described.

The route information fusion unit 78 connects two clusters between one cluster and a flying station corresponding to the cluster. “Two links” means that one aircraft station is connected by two ground stations, and the route from one ground station to the aircraft station is two routes. For example, the path information fusion unit 78 links two ground stations among a plurality of ground stations included in a cluster corresponding to each flying station for each flying station 1a of the two flying stations in FIG. 2 is generated. By connecting a link with two ground stations, even if one ground station becomes unable to communicate, it is possible to communicate between the ground station and the flying station using the link with the other ground station. it can. Of the plurality of ground stations, any one of the ground stations connected to the flying station may be selected. For example, the priority is selected in order from the ground station with the strong radio wave. Alternatively, when the cluster constitutes a unit, the route information fusion unit 78 preferentially selects the communication terminal device carried by the unit leader and the communication terminal device carried by the deputy captain. . In this case, the route design device 50 stores in advance identification information of the communication terminal devices carried by the captain and the deputy captain, respectively. Further, identification information of the communication terminal device is input together with the position information. The input identification information of the communication terminal device is stored in a storage device included in the route design device in association with information indicating the coordinate point of the communication terminal device (ground station). The route information fusion unit 78 acquires the identification information of the communication terminal device corresponding to the coordinate point from the coordinate points of the plurality of ground stations included in the cluster. Then, based on the acquired identification information, it was confirmed that the captain or vice captain stored in advance matched the identification information of the communication terminal device carried by each and confirmed that they matched. Two ground stations are selected as ground stations to link with the air station.
In this way, generating a route that links a plurality of stations (nodes) arranged in two different layers, the ground layer and the aviation layer, is called fusion.

  The network route information (route information 80T) generated as a result of the fusion is, for example, in the example of FIG. 32, the coordinate point of the ground station 1g on the ground layer mesh 7g, the coordinate point of the relay node 1Rg, and the surroundings of the ground layer The boundary line 3Bg, the coordinate point of the flying station 1a on the aviation layer mesh 7a and the coordinate point of the relay node 1Ra, the surrounding boundary line 3Ba of the aviation layer, and the link 2 between the ground station and the flying station. The height H is also included in the network route information (route information 80T).

The route design apparatus of this embodiment uses, for example, a network design framework with a polygon grid, dual graph mesh, and oblique coordinates in a multi-layered structure, so that, for example, a wireless communication terminal device (ground station) carried by a person is arranged If the plane to be used is the ground layer and the plane on which the wireless communication terminal device (aircraft station) mounted on the aircraft is placed is the aviation layer, the ground station located over a wide area moves and the link is not fixed Even in this case, there is an effect that it is possible to design a plurality of routes connecting the ground station via the flying station and a relay node.
In addition, in order to determine the optimal route strictly, it is a network design that requires a huge amount of processing to verify the combination of all nodes, but it is easily arranged over a wide area by the enclosing algorithm over multiple layers of the present invention. In addition, it is possible to obtain a route that connects all nodes with two or more routes. As a result, when relaying with a flying body such as an aircraft and setting a communication path between nodes arranged over a wide area, not only a single communication path but also a plurality of independent paths are designed, A detour route can be secured.

Embodiment 7 FIG.
In Embodiment 6 above, when the plane of the aviation layer mesh is projected on the aviation layer mesh when the plane of the aviation layer mesh is arranged with respect to the plane of the terrestrial layer mesh, the vertex (shown by a dotted line) is shown on the aviation layer mesh. In addition, there is at least one intersection point between the plurality of meshes within the range surrounded by the cluster. However, there are cases where vertices on the aviation layer mesh (intersections where a plurality of meshes indicated by dotted lines intersect) do not exist within the range surrounded by the cluster. In this case, the plane of the aviation layer mesh is moved so that the vertex is within the range surrounded by the cluster, and the position of the plane of the aviation layer mesh with respect to the plane of the ground layer mesh is adjusted.

FIG. 38 is a diagram illustrating an example in which vertices do not exist within the range surrounded by the clusters projected on the aviation layer mesh of the seventh embodiment. The plane of the aviation layer mesh 7a is moved so that the vertex on the aviation layer mesh 7a is shifted in the direction of the center point 21c of the cluster 21 in FIG. 38, and the aviation layer mesh is so that the vertex is within the range surrounded by the cluster. Adjust the position of the surface.
FIG. 39 is a block diagram illustrating a configuration of the route design apparatus according to the seventh embodiment. Except that the aviation layer arrangement processing unit 59a includes the adjustment unit 591, the configuration is the same as that of the route design apparatus of FIG. The aviation layer placement processing unit 59a shifts the vertex on the aviation layer mesh 7a in the direction of the center point 21c of the cluster 21 by the adjustment unit 591 when the vertex does not exist within the range surrounded by the cluster projected on the aviation layer mesh. Thus, the plane of the aviation layer mesh 7a is moved.
FIG. 40 is a flowchart illustrating the operation procedure of the adjustment unit 591.
FIG. 41 is a flowchart showing another operation procedure of the adjustment unit 591.
First, the procedure for moving the plane of the aviation layer mesh by the adjustment unit 591 will be described according to the flowchart of FIG. 40 and 41, in the aviation layer placement process in S3a of FIG. 33, a plurality of clusters projected on the aviation layer mesh have vertices within the range surrounded by the clusters. If there is a cluster that does not.

  The processing of the adjustment unit 591 in FIG. 40 is performed on the center point of the cluster used as a reference when performing the adjustment on the vertex on the air layer mesh at a position close to the center point (in order to distinguish this vertex from other vertices. Called vertex A ”). As shown in FIG. 26, the size of one square of the aviation layer mesh 7a (one square is a regular hexagon centered on the flying station 1a of FIG. 26) is one square of the ground layer mesh ( One square is a regular hexagon with the ground station 1g in FIG. 26 as the center point). The adjustment unit 591 sequentially moves the vertex A to each central point of a plurality of squares included in the aviation layer mesh 1 square, and searches for the optimum position of the vertex A. The optimal position means that when multiple clusters on the ground layer mesh are projected on the air layer mesh, the vertices on the ground layer mesh are included in the area surrounded by each projected cluster. Indicates the position of the layer mesh.

  In FIG. 40, the adjustment unit 591 obtains the center point 21c of each cluster for each of a plurality of clusters on the ground layer mesh. The center point 21c is an average coordinate point obtained from the coordinate points of a plurality of ground stations included in each cluster for each cluster (SA0). Next, one center point 21c is selected from the plurality of center points 21c obtained for each cluster. The initial phase of the aviation layer mesh is set by matching the vertices on the aviation layer mesh that are closest to the coordinate point of the selected center point 21c (SA1). This vertex is vertex A. The condition for selecting one center point is, for example, the condition that the center point of the cluster including the ground station with the strongest radio wave is selected or the center point of the cluster having the largest range surrounding the cluster is selected in advance. The adjustment unit 591 acquires the conditions stored in the storage unit of the route design apparatus and stored in the storage unit. Alternatively, the center point of one cluster may be selected at random without providing conditions. After setting the initial phase, in SA2, for each cluster, the distance between the center point 21c of each cluster and the vertex on the air layer mesh 7a closest to the center point 21c when the cluster is projected onto the air layer mesh. Ask for. The distance obtained for each cluster, the center point 21c, and the coordinates of the vertex A are associated with each other and stored in the storage unit of the route design apparatus. Subsequently, in SA3, the vertex A of the aviation layer mesh 7a is shifted to the center point of another cell of the ground layer mesh 7g within the range surrounded by the selected cluster. The processes of SA2 and SA3 described above are repeated until the vertex A is moved to the center point of all squares within the range surrounded by the selected cluster (SA4). When the repetition of the processes of SA2 and SA3 is completed, the average distance of all the clusters is obtained for each coordinate of the vertex A from the distance obtained for each cluster stored in SA2, and the smallest of the average distances of all the obtained clusters is obtained. The coordinates of the vertex A of the minimum cluster average distance that can be searched are matched with the center point of the cluster selected in SA1, and the aviation layer mesh is arranged on the ground layer mesh.

The processing procedure of another adjustment unit 591 will be described with reference to the flowchart of FIG. In the processing by the adjustment unit 591 in FIG. 41, the distance from the center point of each cluster to the vertex closest to the center point is obtained for each of the plurality of clusters projected on the air layer mesh (SA10). Then, the average distance of all clusters is obtained from the distance obtained for each cluster (SA11), and the obtained average distance of all clusters is stored in the table of the storage unit of the route design device together with the vertex coordinates used in SA10. (SA12). The difference between the distance obtained for each cluster and the average distance of all clusters is obtained for each cluster, and the cluster having the largest difference is selected (SA13). The difference obtained in SA13 is divided by a predetermined number, for example, 10, and the quotient is used as the adjustment value of the adjustment unit 591 (SA14). The plane of the aviation layer mesh is shifted with respect to the plane of the ground layer mesh so that the vertex of SA10 is moved to the center point of the cluster selected in SA13 by the distance corresponding to the adjustment value which is the quotient (SA15). After SA15, the center point of each cluster is obtained for each of the plurality of clusters (SA16). For each of a plurality of clusters, the distance from the center point of the obtained cluster to the vertex closest to the center point is obtained (SA17). Then, the average distance of all clusters is obtained from the distance obtained for each cluster, the average distance of all clusters is obtained from the distance obtained for each cluster, and the calculated average distance of all clusters is calculated in SA17. The coordinate points of the used vertices are stored in a table of the storage unit of the route design device (SA18). The processing from SA15 to SA18 is repeated the number of times obtained by dividing the difference of SA14, for example, 10 times (SA19). When the repetition is completed, the smallest value is searched from the average distance of all clusters stored in the table of the storage unit, and the vertex of SA10 is moved to the coordinate point of the vertex corresponding to the searched value. Place the mesh with respect to the ground layer mesh. The method for obtaining the center point of the cluster is the same as in FIG.
In this way, the adjustment unit 591 adjusts the position of the aviation layer mesh with respect to the ground layer mesh. Although “10” is used in SA19 and SA14, the present invention is not limited to this, and a value larger or smaller than “10” can be arbitrarily set and used.

  In the case where the adjustment unit 591 is not provided, and the apex of the aviation layer mesh does not exist within the range surrounded by the cluster, a flying station that relays between the clusters is arranged on the line constituting the aviation layer mesh. Furthermore, a relay node is arranged at the apex of the air layer mesh near the coordinate point where the air station is arranged, and the apex of the air layer mesh does not exist within the range surrounded by the cluster. Can support cluster relay. However, in this case, since a larger number of flying bodies equipped with necessary flying station stations are required than in the case where the adjustment unit is provided, it is expensive to construct a network.

  Since the route design device of this embodiment includes the adjustment unit, the plane of the aviation layer mesh is changed to the surface of the terrestrial layer mesh even if there is a cluster in which the vertices of the aviation layer mesh do not exist within the range surrounded by the cluster. It is moved with respect to the surface so that the vertices in the aerial layer mesh form exist within the range surrounded by the cluster. For this reason, each cluster has an effect that it is possible to reliably establish a link connection with another cluster by the flying station.

Embodiment 8 FIG.
In the sixth embodiment, the plane of the aviation layer mesh has a height H in the direction perpendicular to the plane of the ground layer mesh and is parallel to the plane of the ground layer mesh. In the seventh embodiment, an example in which the plane of the aviation layer mesh is arranged in the same plane as the plane of the ground layer mesh will be described.

  In FIG. 42, the second layer ground layer mesh 40g is arranged on the same plane as the surface of the first layer ground layer mesh 4g with respect to the first layer ground layer mesh 4g of this embodiment. It is a figure which shows an example. The ground layer mesh 40g of the second layer is on the dual graph mesh 60g of the ground station, and constitutes the network model 1000g of the ground station. As an operation example in which a plurality of bi-body graph meshes are arranged as shown in FIG. 42, there is a case where communication between wireless communication terminal devices carried by a member is relayed by a wireless communication terminal device mounted on a vehicle. In this operation example, a cluster corresponds to a plurality of small units that constitute a large unit, and network route information that relays communication between clusters of small units that work across a wide area with a wireless communication terminal device mounted on a vehicle. Are generated by the path design apparatus having the same configuration as that of FIG. A radio communication terminal device carried by a member is placed in the ground station 1g in the ground layer mesh of the first layer, and a radio communication terminal device mounted on the vehicle is placed on the ground in the ground layer mesh of the second layer. Place in station 102g. Further, when the surface of the second layer ground layer mesh is arranged with respect to the surface of the first layer ground layer mesh, the cluster is arranged on the first layer ground layer mesh, and the first layer One cluster is selected from a plurality of clusters on the ground layer mesh. The position of one wireless communication terminal device among the wireless communication terminal devices carried by each of the plurality of units included in the selected cluster is determined from the surface of the first layer ground layer mesh to the first layer ground layer mesh. The origin of the ground layer mesh of the second layer is arranged in the direction moved horizontally with respect to the surface. Further, when the route information of the first layer and the route information of the second layer are merged, the wireless communication device of the first layer and the wireless communication device of the second layer are as in Embodiment 6. Connect links on the same plane that do not have height H.

  As described above, in the eighth embodiment, the first layer graph and the second layer graph are arranged on the same plane. Therefore, although the wireless communication terminal device has a different communicable range, A wireless communication terminal device having the same “height” of “longitude and height” is divided into a plurality of layers, route information for each layer is generated, route information for each layer is merged, and a communicable range is There is an effect that it is possible to generate network route information for relaying a link between narrow wireless communication terminals by a wireless communication terminal apparatus having a wide communication range.

Embodiment 9 FIG.
In this embodiment, an example of a route design apparatus and a route design method for associating communication range information with time will be described.

  The position information input unit 51 receives position information transmitted by including time information indicating the time when the communication apparatus (node) constituting the network model calculates its own position information in the position information. Alternatively, the time information included in the position information may be positioning time information included in a positioning signal transmitted from a satellite used when calculating its own position, for example. The communication range information storage unit 55 stores communication range information for storing the first communicable range in association with time. The ground layer oblique coordinate generation unit 57g inputs time information included in the position information, acquires a communicable range corresponding to the time information from the communication range information storage unit 55, and corresponds to the acquired time information. Generate an oblique coordinate graph of the communicable range. The position information input unit 51 inputs position information having different time information from a plurality of nodes, and the communicable range corresponding to the time information may be the same or different. When the communicable ranges are different, for example, an average value of the communicable ranges is calculated, and the average value is used for generating the oblique coordinate graph. The other elements of the route design device 50 are the same as those in the sixth embodiment.

  As described above, by making the first communicable range correspond to the time, it is possible to design a network route suitable for the communication environment at the time when designing the communication route of the network model.

Embodiment 10 FIG.
In Embodiment 6, the first and second graphs are generated as oblique coordinate graphs using regular hexagons as shown in FIG. However, the first and second graphs may be generated using a square. In this case, in the first and second graphs, the y axis is perpendicular to the x axis. In the oblique coordinate graphs of the first to ninth embodiments, a graph in which the y axis is perpendicular to the x axis is included in the oblique coordinate graph.

  As described above, in the tenth embodiment, the first and second graphs can be generated using hexagons or squares, so that the path designer selects either hexagons or squares. Thus, network route information can be generated.

Embodiment 11 FIG.
In the sixth embodiment, the example in which the two-layer network model of the ground layer and the aviation layer is merged into one network model has been described. However, in addition to the ground layer and the aviation layer, a plurality of layers may be formed even if they are a water layer or a satellite layer. In addition, one station (node) placed in each of multiple layers is connected by two links, and even if a failure occurs in one link, communication is possible by using the other link Generate network route design information. FIG. 44 is a diagram for explaining a route of a network model by two layers. As described above, conventionally, even in the case of a two-layer network model, there is a problem in that, in the aviation layer, since the aircraft stations are connected by a single link, communication cannot be performed if a failure occurs. In the sixth embodiment, such a problem is solved. For example, the layer in which the wireless communication terminal device for relay that relays communication between clusters is arranged is an aviation layer mesh or a water layer mesh. If it is a satellite layer mesh, the cost of a device equipped with a wireless communication terminal device is required. For this reason, when cost is prioritized over securing a communication path in the event of a failure, a single link between the wireless communication terminal devices may be provided in the layer where the wireless communication terminal device for relay is arranged. Absent.

(A) shows the model of the ad hoc network of this invention, (b) is a figure which shows the outline | summary of the network design method. (A)-(c) is a schematic diagram showing a method of ensuring survivability (function to provide a service even when a failure occurs) by duplicating a conventional wired communication path, as disclosed in JP-A-2002-335192 and the like. It is. FIG. 3 is a block diagram illustrating an example of elements constituting the route design apparatus according to the first embodiment. It is a figure which shows an example of the communication range information which the communication range information storage part 55 of Embodiment 1 memorize | stores. It is a figure which shows the external appearance of the path | route design apparatus in Embodiment 1. FIG. FIG. 2 is a hardware configuration diagram of the route design apparatus according to the first embodiment. 6 is a flowchart of processing for arranging the position of the communication device on the oblique coordinate graph by the framework processing unit of the first embodiment. FIG. FIG. 6 is a flowchart of processing for generating and outputting network route design information by the enclosure processing unit according to the first embodiment; It is a figure which shows an example of a diagonal coordinate graph. It is a figure which shows the communicable range 5 which a radio wave reaches | attains from a node with a ball | bowl. It is the figure which replaced the circle | round | yen with the polygon, for example, a hexagon, and reduced the communicable range 5 to 1/2, and showed the network model by the hexagonal grid. It is a figure which shows an example of a polygonal grid, (a) is a hexagon, (b) is a quadrangle, (c) shows a triangular grid. It is a figure which shows the dual graph mesh corresponding to each polygonal grid of FIG. 12 (a), (b), (c), (a) is a triangular mesh, (b) is a square mesh, (c) is a hexagon. The grid of mesh is shown. (A), (b) is a figure explaining progress of the execution situation of an enclosure (Enclosure) algorithm. (A), (b), (c) is a figure explaining progress of the execution situation of an enclosure (Enclosure) algorithm. (A), (b), (c) is a figure explaining the detailed degeneration method of the surrounding boundary line according to degeneration rule information. (A), (b) is a figure which shows the utilization form of the route design by the route design apparatus 50 of Embodiment 1. FIG. FIG. 10 is a block diagram illustrating an example of elements constituting the route design apparatus according to the second embodiment. It is a figure which shows an example of the communication range information which the communication range information storage part 55 of Embodiment 2 memorize | stores. FIG. 10 is a block diagram illustrating an example of elements constituting the route design apparatus according to the third embodiment. It is a figure which shows an example of the communication range information which the communication range information storage part 55 of Embodiment 3 memorize | stores. FIG. 10 is a block diagram illustrating an example of elements constituting the route design apparatus according to the fourth embodiment. It is a figure which shows an example of the communication range information which the communication range information storage part 55 of Embodiment 4 memorize | stores. FIG. 10 is a block diagram illustrating an example of elements constituting the route design apparatus according to the fifth embodiment. FIG. 10 is a diagram illustrating a model of a two-layer structure of an ad hoc network according to a sixth embodiment. FIG. 10 is a diagram illustrating a two-layer network model used in the network design method of the sixth embodiment. FIG. 20 is a block diagram illustrating an example of elements constituting the route design apparatus according to the sixth embodiment. (A) is a figure which shows the example which the ground layer arrangement | positioning process part of Embodiment 6 has arrange | positioned the ground station on a ground layer diagonal coordinate graph. (B) is a figure which shows the example which the cluster production | generation part classified the ground station on a ground layer diagonal coordinate graph into a some cluster, and produced | generated the surrounding boundary line for every cluster. FIG. 20 is a diagram illustrating an example in which an aerial layer oblique coordinate graph is arranged with respect to the ground layer oblique coordinate graph of the sixth embodiment. It is a figure which shows the example which projected the surrounding boundary line for every cluster on the ground layer diagonal coordinate graph of Embodiment 6 on the aviation layer diagonal coordinate graph. (A) is a figure which shows the example which has arrange | positioned the flight body station corresponding to every cluster on an aviation layer diagonal coordinate graph. (B) is a figure which shows the example of the degeneration surrounding boundary line which has arrange | positioned the virtual node on a ground layer diagonal coordinate graph. It is a figure which shows the example of the degeneration surrounding boundary line which has arrange | positioned the virtual node on the aviation layer diagonal coordinate graph of Embodiment 6. FIG. FIG. 20 is a flowchart illustrating a processing procedure of the route design apparatus according to the sixth embodiment. It is a flowchart figure which shows the detailed procedure of the enclosing process of S5g and S5a of FIG. FIG. 10 is a diagram illustrating multi-hop according to a sixth embodiment. (A) is a figure which shows the node range (area) of each ground station when the number of hops is set to 1. FIG. (B) is a figure which shows the node range (area) of each ground station when the number of hops is two. FIG. 20 is a flowchart showing cluster generation processing S4g by the cluster generation unit 58 of the sixth embodiment. It is a figure which shows the example in which a vertex does not exist in the range which the cluster projected on the aviation layer mesh of Embodiment 7 surrounds. FIG. 10 is a block diagram illustrating a configuration of a route design apparatus according to a seventh embodiment. FIG. 23 is a flowchart illustrating an operation procedure of the adjustment unit 591 according to the seventh embodiment. FIG. 38 is a flowchart showing another operation procedure of the adjustment unit 591 according to the seventh embodiment. With respect to the first-layer bibody graph mesh 60g of the eighth embodiment, the second-layer bibody graph mesh 60a is arranged on the same plane as the surface of the first-layer bibody graph mesh 60g. It is a figure which shows an example. FIG. 25 is a diagram illustrating an example of obtaining coordinate points from node position information according to the sixth embodiment. It is a figure explaining the path | route of the network model by 2 layers.

Explanation of symbols

  1, 1S, 1D, 40 nodes, 1R, 1Ra, 1Rg Relay node, 1a Aircraft station, 1C, 1g, 100g Ground station, 1NB1, 1NB2, 1NB3 Adjacent node range, 1V, 1Va, 1Vg Virtual node, 1W union , 2, 2a, 2g link, 3a, 3b, 3c, 3d, 31, 32, 33 route, 3B surrounding boundary line, 3Ba air layer surrounding boundary line, 3Bg ground layer surrounding boundary line, 3Ha inter-aircraft route 3Hg Inter-ground station route, 4 Hexagonal grid, 4a Aviation layer mesh, 4g, 40g Ground layer mesh, 5, 5aL Communication range, 5aR Projection to network layer consisting of ground station 1g, 6 Dual graph mesh, 6a Flight Dual graph mesh of body station, 6g, 60g Dual graph mesh of ground station, 7 Oblique coordinates, 7a Air Ear Mesh, 7g Ground Layer Mesh, 10 Network Model, 10a Aircraft Station Network Model, 10g, 1000g Ground Station Network Model, 21 Cluster, 21c Center Point, 50 Route Design Device, 51 Location Information Input Unit, 53 Framework Processing unit, 55 Communication range information storage unit, 57 Oblique coordinate generation unit, 57a Aviation layer oblique coordinate generation unit, 57g Ground layer oblique coordinate generation unit, 59 Arrangement processing unit, 59a Aviation layer arrangement processing unit, 59g Ground layer Arrangement processing unit 60, 61, 62 Position information, 70 Enclosing processing unit, 73 Surrounding boundary reduction unit, 75 Degeneration rule information storage unit, 77 Boundary degeneration unit, 78 Route information fusion unit, 79 Route design unit, 80, 80P, 80T route information, 91 radio wave intensity measurement unit, 93 antenna, 94 receiver Position calculation unit, 95 positioning reception unit, 97 position calculation unit, 100a origin of aerial layer oblique coordinate graph, 101a coordinate point, 102g ground station, 137 CPU, 138 bus, 139 ROM, 140 RAM, 141 CRT display device, 142 K / B, 143 mouse, 144 communication board, 145 FDD, 146 magnetic disk device, 147 OS, 148 window system, 149 program group, 150 file group, 186 CDD, 187 printer device, 188 scanner device, 200 system unit, 201 Satellite group, 202 geostationary satellite, 203 GPS satellite, 204 quasi-zenith satellite, 310 FAX machine, 320 telephone, 500 web server, 501 internet, 505 LAN, 581 multi-hop adjacent node area generator , 582 Area union generation unit, 591 adjustment unit.

Claims (17)

In a route design device that designs a network route between a first wireless communication device and a second wireless communication device,
A communication range information storage unit for storing communication range information indicating a communicable range of the first wireless communication device and the second wireless communication device;
A position information input unit for inputting first position information indicating the position of the first wireless communication device and second position information indicating the position of the second wireless communication device;
An oblique coordinate generation unit that generates an oblique coordinate graph with the communication range indicated by the communication range information stored in the communication range information storage unit as a scale;
The first coordinate point and the second coordinate point on the oblique coordinate graph generated by the oblique coordinate generation unit corresponding to each of the first position information and the second position information input by the position information input unit A coordinate point is obtained, and the obtained first coordinate point and second coordinate point are arranged on the oblique coordinate graph, and the arranged first coordinate point and second coordinate point are enclosed. An arrangement processing unit that generates a surrounding boundary line to be inserted on the oblique coordinate graph;
A reduced peripheral boundary line obtained by reducing the range surrounding the first coordinate point and the second coordinate point by moving the peripheral boundary line generated on the oblique coordinate graph by the arrangement processing unit to the inside of the peripheral boundary line A peripheral boundary reduction unit for generating the above on the oblique coordinate graph;
A degeneration rule information storage unit for storing degeneration rule information for arranging the virtual communication device inside the peripheral boundary line and degenerating the peripheral boundary line;
In accordance with the degeneration rule information stored in the degeneration rule information storage unit, a virtual communication device arranged by arranging the virtual communication device inside the reduced peripheral boundary line generated by the peripheral boundary reduction unit on the oblique coordinate graph A boundary degeneration part that generates a degenerate peripheral boundary line on the oblique coordinate graph by degenerating the reduced peripheral boundary line so as to pass;
The oblique coordinate graph of the virtual communication device in which the boundary degeneration unit generates the degenerate peripheral boundary line generated on the oblique coordinate graph, the first coordinate point, the second coordinate point, and the boundary degeneration unit. A route design apparatus comprising: a route design unit that designs the network route from above and generates and outputs route design information. In a route design device that designs a network route between itself and another wireless communication device,
A communication range information storage unit for storing communication range information indicating a communicable range between the self and the other wireless communication device;
A receiving position calculating unit that receives positioning signal information and calculates first position information indicating its own position;
A position information input unit for inputting second position information indicating the position of the other wireless communication device;
An oblique coordinate generation unit that generates an oblique coordinate graph with the communication range indicated by the communication range information stored in the communication range information storage unit as a scale;
The first on the oblique coordinate graph generated by the oblique coordinate generation unit corresponding to each of the first position information calculated by the reception position calculation unit and the second position information input by the position information input unit. And the second coordinate point are arranged on the oblique coordinate graph, and the arranged first coordinate point and second coordinate point are arranged on the oblique coordinate graph. An arrangement processing unit for generating a surrounding boundary line enclosing two coordinate points on the oblique coordinate graph;
A reduced peripheral boundary in which the surrounding boundary line generated on the oblique coordinate graph is moved inside the peripheral boundary line and the range surrounding the first coordinate point and the second coordinate point is reduced. A peripheral boundary reduction unit for generating a line on the oblique coordinate graph;
A degeneration rule information storage unit for storing degeneration rule information for arranging the virtual communication device inside the peripheral boundary line and degenerating the peripheral boundary line;
In accordance with the degeneration rule information stored in the degeneration rule information storage unit, a virtual communication device arranged by arranging the virtual communication device inside the reduced peripheral boundary line generated by the peripheral boundary reduction unit on the oblique coordinate graph A boundary degeneration part that generates a degenerate peripheral boundary line on the oblique coordinate graph by degenerating the reduced peripheral boundary line so as to pass;
The oblique coordinate graph of the virtual communication device in which the boundary degeneration unit generates the degenerate peripheral boundary line generated on the oblique coordinate graph, the first coordinate point, the second coordinate point, and the boundary degeneration unit. A route design apparatus comprising: a route design unit that designs the network route from above and generates and outputs route design information. The reduced peripheral boundary line has a plurality of sides,
The peripheral boundary reduction unit generates the reduced peripheral boundary line so that at least one of the first coordinate point and the second coordinate point is arranged on the reduced peripheral boundary line,
The reduction rule information storage unit uses the reduction peripheral boundary for the side where the first coordinate point and the second coordinate point are arranged among a plurality of sides of the reduction peripheral boundary line as the reduction rule information. Information indicating that the line is not contracted, and the side where one of the first coordinate point and the second coordinate point is arranged among the plurality of sides of the reduced boundary line Arranging two virtual communication devices inside the upper coordinate point and storing information indicating that a degenerate peripheral boundary line connecting the two arranged virtual communication devices and the coordinate point on the side is generated The route design apparatus according to claim 1, wherein:   3. The path design apparatus according to claim 1, wherein the oblique coordinate graph is an oblique coordinate graph corresponding to any of a triangular mesh, a square mesh, and a hexagonal mesh. Each of the first position information and the second position information is a radio signal having a predetermined radio field intensity,
The position information input unit includes a radio wave intensity measurement unit that measures the intensity of the radio signal of at least one of the first position information and the second position information,
The communication range information storage unit stores the communication range information corresponding to the radio wave intensity,
The oblique coordinate generation unit acquires communication range information corresponding to the strength of the radio signal measured by the radio field intensity measurement unit from the communication range information storage unit, and graduates the communicable range indicated by the acquired communication range information. The path design apparatus according to claim 1, wherein an oblique coordinate graph is generated. At least one of the first position information and the second position information includes type information of the wireless communication device that outputs the position information,
The communication range information storage unit stores the communication range information in association with the type information of the wireless communication device,
The oblique coordinate generation unit acquires communication range information corresponding to type information included in at least one of the first position information and the second position information from the communication range information storage unit, The route design apparatus according to claim 1, wherein the oblique coordinate graph is generated with the communication range indicated by the acquired communication range information as a scale. At least one of the first position information and the second position information has time information indicating time,
The communication range information storage unit stores the communication range information in association with time information,
The oblique coordinate generation unit acquires communication range information corresponding to time information included in at least one of the first position information and the second position information from the communication range information storage unit, The route design apparatus according to claim 1, wherein the oblique coordinate graph is generated with the communication range indicated by the acquired communication range information as a scale. In a route design method for designing a network route between a first wireless communication device and a second wireless communication device,
A communication range information storage step of storing communication range information indicating a communicable range between the first wireless communication device and the second wireless communication device in a communication range information storage unit;
A position information input step of inputting first position information indicating the position of the first wireless communication device and second position information indicating the position of the second wireless communication device;
The oblique coordinate generation step of extracting the communication range information stored by the communication range information storage step from the communication range information storage unit and generating an oblique coordinate graph with the extracted communication range as a scale,
First coordinate points on the oblique coordinate graph generated by the oblique coordinate generation step corresponding to each of the first position information and the second position information input by the position information input step, and 2 coordinate points, and the obtained first coordinate point and second coordinate point are arranged on the oblique coordinate graph, and the arranged first coordinate point and second coordinate point are An arrangement processing step for generating a surrounding boundary line enclosing the image on the oblique coordinate graph;
A reduced perimeter that reduces the range surrounding the first coordinate point and the second coordinate point by moving the peripheral boundary line generated on the oblique coordinate graph by the arrangement processing step to the inside of the peripheral boundary line A peripheral boundary reduction step of generating a boundary line on the oblique coordinate graph;
A degeneration rule information storage step of storing, in the degeneration rule information storage unit, degeneration rule information for arranging the virtual communication device inside the peripheral boundary line and degenerating the peripheral boundary line;
The reduction rule information stored in the reduction rule information storage step is acquired from the reduction rule information storage unit, and the reduced peripheral boundary line generated on the oblique coordinate graph by the peripheral boundary reduction step according to the acquired reduction rule information A boundary degeneration step of generating a degenerated peripheral boundary line on the oblique coordinate graph by degenerating a reduced peripheral boundary line so as to pass through the virtual communication apparatus disposed by arranging the virtual communication apparatus inside
The degenerate surrounding boundary line generated on the oblique coordinate graph by the boundary degeneration step, the first coordinate point, the second coordinate point, and the virtual communication device arranged by the boundary degeneration step A route design method comprising: a route design step of designing the network route from a position on an oblique coordinate graph to generate and output route design information. A network path for connecting a plurality of wireless communication devices each having a first communicable range via one or more wireless communication devices having a second communicable range different from the first communicable range. In the route design device to be set,
A communication range information storage unit for storing the first communication range information indicating the first wireless coverage and the second communication range information indicating the second wireless coverage;
A position information input unit for inputting position information including latitude information and longitude information indicating the position of each wireless communication device from a plurality of wireless communication devices each having the first communicable range;
The communicable range indicated by the first communication range information stored in the communication range information storage unit is represented by a polygon, and a plurality of polygons that are arranged adjacent to each other by sharing the sides of the polygon are arranged. Are connected by a line passing through the shared side, and a plurality of lines passing through the center point are generated for each of the center points of the plurality of polygons, and one of the center points of the plurality of polygons is generated. The center point is selected as the origin of the graph, and the x-axis line and the y-axis line are selected from among a plurality of lines passing through the selected origin, and longitude is converted into distance on the x-axis. A first graph generation unit for generating a first graph indicating a value and indicating a value obtained by converting latitude to distance on the y-axis;
The communicable range indicated by the second communication range information stored in the communication range information storage unit is represented by a polygon, and a plurality of polygons are arranged by sharing the sides of the polygon so that the polygons are adjacent to each other. Are connected by a line passing through the shared side, and a plurality of lines passing through the center point are generated for each of the center points of the plurality of polygons, and one of the center points of the plurality of polygons is generated. The center point is selected as the origin of the graph, and the x-axis line and the y-axis line are selected from among a plurality of lines passing through the selected origin, and longitude is converted into distance on the x-axis. A second graph generation unit for generating a second graph indicating a value and indicating a value obtained by converting latitude to distance on the y-axis;
A value obtained by converting longitude information for each of a plurality of wireless communication devices into a distance and a value obtained by converting latitude information into a distance based on the position information of each wireless communication device of the plurality of wireless communication devices input by the position information input unit. The coordinate points on the first graph for each of the plurality of wireless communication devices are obtained from the obtained values for the plurality of wireless communication devices, and the obtained coordinate points are arranged on the first graph. 1 arrangement processing unit;
The plurality of coordinate points on the first graph arranged by the first arrangement processing unit are classified based on a predetermined condition to generate a plurality of clusters including the plurality of coordinate points, and are included in the generated plurality of clusters. A cluster generation unit that generates a surrounding boundary line surrounding the plurality of coordinate points on the first graph;
On the input first graph, the peripheral boundary line generated by the cluster generation unit on the first graph, the first graph, and the second graph generated by the second graph generation unit are input. A second cluster is selected with respect to the first graph such that an origin on the second graph is arranged within a range surrounded by a peripheral boundary of the selected cluster. Arrange the graph, project the surrounding boundary line of the cluster other than the selected cluster on the arranged second graph, and close the second surrounding area surrounded by the surrounding boundary line for each projected cluster. The polygon center point on the graph is associated with each cluster, and the polygon center point associated with each cluster and the origin coordinate point have the second communicable range corresponding to each cluster. Coordinates for placing wireless communication devices As a second arrangement processing unit that generates a surrounding border enclosing these coordinate points on said second graph,
The cluster generation unit generates a reduced peripheral boundary line for each cluster by moving the peripheral boundary line generated for each cluster on the first graph to the inside of the peripheral boundary line and reducing a range surrounded by the peripheral boundary line. The reduced peripheral boundary line on the second graph obtained by moving the peripheral boundary line generated on the second graph by the second arrangement processing unit to the inside of the peripheral boundary line to reduce the range surrounded by the peripheral boundary line A surrounding boundary reduction unit that generates
A reduction rule for storing reduction rule information for reducing a surrounding boundary line by arranging a virtual communication device inside each of the reduced surrounding boundary lines of the reduced surrounding boundary line for each cluster and the reduced surrounding boundary line on the second graph An information storage unit;
According to the degeneration rule information stored in the degeneration rule information storage unit, a virtual communication device is arranged inside the reduced peripheral boundary line for each cluster on the first graph generated by the peripheral boundary reduction unit, and the virtual communication is arranged A reduced peripheral boundary line for each cluster is reduced so as to pass through the device to generate a reduced peripheral boundary line for each cluster on the first graph, and according to the reduced rule information stored in the reduced rule information storage unit, A virtual communication device is arranged inside the reduced peripheral boundary line on the second graph generated by the peripheral boundary reducing unit, and the reduced peripheral boundary line is reduced so as to pass through the arranged virtual communication device. A boundary degeneracy unit that generates a line on the second graph;
A virtual communication device in which the boundary degeneration unit generates a degenerate peripheral boundary line for each cluster generated on the first graph, a plurality of coordinate points included in each cluster, and the boundary degeneration unit arranged on the first graph And the path design information for each cluster having the coordinate points of the degenerate surrounding boundary line generated on the second graph by the boundary degeneration unit and the cluster for each cluster determined by the second placement processing unit Wireless communication having a second communicable range having a coordinate point where a wireless communication device having a second communicable range is arranged and a coordinate point of a virtual communication device arranged on the second graph by the boundary degeneracy unit A first route design unit for generating route design information of the device;
Two coordinate points are selected from among a plurality of coordinate points included in each cluster included in the route design information for each cluster generated by the first route design unit, and each of the selected two coordinate points and the first Route information for connecting the coordinate point where the wireless communication device having the second communicable range for each cluster included in the route design information of the wireless communication device having the second communicable range generated by the route design unit is provided. Generated for each cluster, the generated route information, the route design information for each cluster generated by the first route design unit, and the second communicable range generated by the first route design unit. And a second route design unit that generates and outputs network route information for connecting each cluster via a wireless communication device having a second communicable range based on the route design information of the wireless communication device having Octopus Route design device according to claim. The second arrangement processing unit arranges the plane of the second graph in parallel with a predetermined height in a direction perpendicular to the plane of the first graph,
10. The route design apparatus according to claim 9, wherein the wireless communication device having the second communicable range is a communication station mounted on a flying object. The second arrangement processing unit arranges the plane of the second graph on the same plane with a distance corresponding to the second communicable range with respect to the plane of the first graph,
The route designing apparatus according to claim 9, wherein the wireless communication apparatus having the second communicable range is a ground station. The cluster generation unit includes a classification condition storage unit that stores the number of hops when the first communicable range is 1 hop as a condition for classifying the plurality of coordinate points on the first graph into a plurality of clusters. ,
An area generating unit that generates a plurality of areas on the first graph having a distance of the number of hops stored in the classification condition storage unit from the center for each of a plurality of coordinate points on the first graph. ,
An area classification unit configured to classify the plurality of areas generated on the first oblique graph into a plurality of clusters by making adjacent areas of the plurality of areas generated by the area generation unit the same cluster The route design apparatus according to claim 9. Each of the reduced peripheral boundary line for each cluster and the reduced peripheral boundary line on the second graph has a plurality of sides,
When generating the reduced peripheral boundary line for each cluster, the peripheral boundary reducing unit arranges at least one coordinate point among the plurality of coordinate points included in each cluster for each cluster on the reduced peripheral boundary line. When generating the reduced peripheral boundary line and generating the reduced peripheral boundary line on the second graph as described above, at least among a plurality of coordinate points where the wireless communication device having the second communicable range is arranged Generating the reduced peripheral border so that one coordinate point is positioned on the reduced peripheral border;
The degeneration rule information storage unit includes, as the degeneration rule information, a side where a plurality of coordinate points where a wireless communication device having the first communicable range is arranged among a plurality of sides of the reduced peripheral boundary line are arranged. For the side where a plurality of coordinate points for arranging the wireless communication device having the second communicable range are arranged, information indicating that the reduced peripheral boundary line is not reduced, and a plurality of the reduced peripheral boundary line Of the sides, one side has one coordinate point on which the wireless communication device having the first communicable range is arranged and one coordinate point on which the wireless communication device has the second communicable range. For the arranged sides, two virtual communication devices are arranged inside the coordinate points on the sides, and a degenerate peripheral boundary line connecting the two arranged virtual communication devices and the coordinate points on the sides is generated. Memorize information Route design device according to claim 9, wherein Rukoto.   The polygon that represents the communicable range indicated by the first communication range information and the polygon that represents the communicable range indicated by the second communication range information are either a hexagon or a quadrangle. The route design apparatus according to claim 9. At least one position information among the position information of each wireless device input by the position information input unit has time information indicating time,
The communication range information storage unit stores the first communication range information in association with time information,
The first graph generation unit acquires first communication range information corresponding to time information included in the position information from the communication range information storage unit, and determines a communicable range indicated by the acquired first communication range information. The route design apparatus according to claim 9, wherein the first graph having one scale is generated. The second arrangement processing unit surrounds the projected peripheral boundary line with a point at which a plurality of lines passing through each center point intersect for each of a plurality of polygon center points on the second graph. When there is a cluster that does not include the vertex on the second graph in the range, the center point of the range surrounded by the surrounding boundary of the projected cluster is obtained, and the closest point to the obtained center point is obtained on the second graph. The distance from the center point of the polygon to the center point of the area surrounding the projected boundary around the projected cluster is obtained for all projected clusters, and the average of all clusters is obtained based on the obtained distance. And select the cluster with the largest difference between the distance obtained for each cluster and the center point of the range surrounded by the surrounding boundary of the selected cluster and the polygon on the second graph closest to the center point of The position of the origin of the second graph relative to the first graph is moved so that the distance to the center point is close to the average, and the center point of the range surrounded by the peripheral boundary of the selected cluster and its center point The path design apparatus according to claim 9, further comprising an adjustment unit that adjusts a distance to a center point of the polygon on the second graph closest to the point. A network path for connecting a plurality of wireless communication devices each having a first communicable range via one or more wireless communication devices having a second communicable range different from the first communicable range. In the route design method of the route design device to be set,
A communication range information storage step of storing, in a communication range information storage unit, first communication range information indicating the first wireless range and second communication range information indicating the second wireless range;
A position information input step of inputting position information having latitude information and longitude information indicating the position of each wireless communication device from a plurality of wireless communication devices each having the first communicable range;
The communicable range indicated by the first communication range information stored in the communication range information storage unit by the communication range information storage step is represented by a polygon, and a plurality of polygons are arranged adjacent to each other by sharing the sides of the polygon, By connecting the center points of a plurality of arranged polygons with a line passing through the shared side, a plurality of lines passing through the center point are generated for each center point of the plurality of polygons, and the plurality of polygons are generated. Select one of the square center points as the graph origin, and select the x-axis line and the y-axis line from among the multiple lines that pass through the selected origin. A first graph generation step for generating a first graph indicating a value obtained by converting longitude into a distance, and a value obtained by converting latitude into a distance on the y-axis;
The communication range indicated by the second communication range information stored in the communication range information storage unit by the communication range information storage step is represented by a polygon, and a plurality of polygons are arranged adjacent to each other by sharing the sides of the polygon, By connecting the center points of a plurality of arranged polygons with a line passing through the shared side, a plurality of lines passing through the center point are generated for each center point of the plurality of polygons, and the plurality of polygons are generated. Select one of the square center points as the graph origin, and select the x-axis line and the y-axis line from among the multiple lines that pass through the selected origin. A second graph generation step for generating a second graph indicating a value obtained by converting longitude into a distance and indicating a value obtained by converting latitude into a distance on the y-axis;
A value obtained by converting longitude information for each of a plurality of wireless communication devices into a distance and a value obtained by converting latitude information into a distance based on the position information of each wireless communication device of the plurality of wireless communication devices input in the position information input step. The coordinate points on the first graph for each of the plurality of wireless communication devices are obtained from the obtained values for the plurality of wireless communication devices, and the obtained coordinate points are arranged on the first graph. 1 arrangement processing step;
The plurality of coordinate points on the first graph arranged in the first arrangement processing step are classified based on a predetermined condition to generate a plurality of clusters including the plurality of coordinate points, and are included in the generated plurality of clusters. A cluster generation step of generating a peripheral boundary line surrounding the plurality of coordinate points on the first graph;
On the input first graph, the peripheral boundary line and the first graph generated on the first graph by the cluster generation step and the second graph generated by the second graph generation step are input. A second cluster is selected with respect to the first graph such that an origin on the second graph is arranged within a range surrounded by a peripheral boundary of the selected cluster. Arrange the graph, project the surrounding boundary line of the cluster other than the selected cluster on the arranged second graph, and close the second surrounding area surrounded by the surrounding boundary line for each projected cluster. The polygon center point on the graph is associated with each cluster, and the polygon center point associated with each cluster and the origin coordinate point have the second communicable range corresponding to each cluster. Wireless communication device As the coordinate point location, a second arrangement step of generating peripheral border enclosing these coordinate points on said second graph,
In addition to generating a reduced peripheral boundary line for each cluster by reducing the range surrounded by the peripheral boundary line by moving the peripheral boundary line generated for each cluster generated on the first graph by the cluster generation step to the inside of the peripheral boundary line The reduced peripheral boundary line on the second graph obtained by moving the peripheral boundary line generated on the second graph by the second arrangement processing step to the inside of the peripheral boundary line to reduce the range surrounded by the peripheral boundary line A surrounding boundary reduction process to generate
Reduced rule information is stored as reduced rule information for reducing a surrounding boundary line by placing a virtual communication device inside each reduced peripheral boundary line of the reduced peripheral boundary line for each cluster and the reduced peripheral boundary line on the second graph. A degeneration rule information storage step to be stored in a section;
In accordance with the degeneration rule information stored in the degeneration rule information storage unit in the degeneration rule information storage step, a virtual communication device is arranged inside the reduced peripheral boundary line for each cluster on the first graph generated by the peripheral boundary reduction step. The reduced peripheral boundary line for each cluster is reduced so as to pass through the arranged virtual communication device, and the reduced peripheral boundary line for each cluster is generated on the first graph. In accordance with the degeneration rule information stored in the rule information storage unit, the virtual communication device is arranged inside the reduced peripheral boundary line on the second graph generated by the peripheral boundary reduction step so as to pass through the arranged virtual communication device. A boundary degeneration step of generating a degenerated peripheral boundary line on the second graph by reducing the reduced peripheral boundary line to
A virtual demarcation peripheral line for each cluster generated on the first graph by the boundary degeneration step, a plurality of coordinate points included in each cluster, and a virtual communication device arranged on the first graph by the boundary degeneration step And the path design information for each cluster having the coordinate points of the degenerate surrounding boundary line generated on the second graph by the boundary degeneration step and the cluster for each cluster determined by the second arrangement processing step. Wireless communication having a second communicable range having a coordinate point where a wireless communication device having a second communicable range is arranged and a coordinate point of a virtual communication device arranged on the second graph by the boundary degeneration step A first route design process for generating route design information of the device;
Two coordinate points are selected from among a plurality of coordinate points included in each cluster included in the route design information for each cluster generated by the first route design step, and each of the selected two coordinate points and the first Path information for connecting the coordinate point where the wireless communication device having the second communicable range for each cluster included in the route design information of the wireless communication device having the second communicable range generated by the route design step of FIG. Generated for each cluster, the generated route information, the route design information for each cluster generated by the first route design step, and the second communicable range generated by the first route design step. Generating and outputting network route information for connecting the respective clusters via the wireless communication device having the second communicable range based on the route design information of the wireless communication device having the second Route design method characterized in that it comprises a route design process.

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