JP4458069B2 - Logical identifier automatic setting device and method, communication device, control device, and program - Google Patents

Description

  The present invention relates to a technique for automatically setting a logical identifier for a plurality of communication devices connected to be able to communicate with each other through a network.

  As a typical method for automatically setting a logical identifier capable of uniquely identifying a communication device such as a computer having a communication function, there is a method using a DHCP (Dynamic Host Configuration Protocol) server. In this DHCP server method, logical identifiers are randomly assigned to a plurality of communication devices.

  On the other hand, in Patent Document 1, in a communication system in which a plurality of communication devices are cascade-connected with one optical fiber communication path, a communication device connected from the communication device connected to the head of the optical fiber communication path to the tail of the communication device. In order, the logical identifier (address number in Patent Document 1) set in the own communication device is incremented (or decremented) and transferred to the adjacent communication device through the optical fiber communication channel. A technique for setting logical identifiers in the same order as the order of connection has been proposed. Similar techniques are also described in paragraphs 36 and 37 of Patent Document 2.

  Further, in Patent Document 3, in a parallel computer system in which a plurality of unit processors having a plurality of communication links for communication with adjacent processors are connected in a grid pattern by the communication links, a reference processor is directed to surrounding processors. Then, the processor number corresponding to the physical arrangement location is assigned to each processor by sequentially propagating the temporary processor number through the communication link while incrementing (or decrementing). When temporary processor numbers are set for all the processors, they are collected and sorted in the reference processor, and converted into consecutive real processor numbers that increase in number as they move farther from the reference processor.

Japanese Patent No. 3216894 JP 2003-44558 A Japanese Patent No. 2565281

  As described above, various methods for automatically setting logical identifiers in a plurality of communication devices have been proposed. However, it is difficult to reflect the intention of the system administrator in any method. That is, in the method using the DHCP server, logical identifiers are set randomly, and in the methods according to Patent Documents 1 to 3, a logical identifier that is uniquely determined by the connection order of communication paths used for communication between communication devices is set. Will be. For example, if the logical identifiers can be set according to the arrangement of the communication devices arranged on the floor, the communication device can be identified by looking at the logical identifier, so that maintenance and the like are facilitated. In this case, if the communication path is connected in the order of the communication devices arranged on the floor, the technology of Patent Document 1 can be used, but it is not necessarily applied if the communication path is not connected in the installed order. Can not. Further, when a plurality of communication devices are connected to a communication path such as Ethernet (registered trademark), the concept of “communication path connection order” does not exist in the first place, and thus cannot be applied from the beginning.

  The present invention has been proposed in view of such circumstances, and its purpose is to set a logical identifier as intended by a system administrator for a plurality of communication devices connected to be able to communicate with each other through a network. It is to be able to do it.

  A first logical identifier automatic setting device according to the present invention is a logical identifier automatic setting device in a communication system in which a plurality of machines are connected to a network through a network interface, and a control device capable of communicating with the plurality of machines through the network. Each of the machines has at least two adjacent machine connection units for connecting to another machine via an adjacent machine connection line which is a communication medium different from the network, and a temporary logic that holds a temporary logical identifier of the own machine. An identifier holding means, an adjacent machine temporary logical identifier holding means for holding the temporary logical identifier of the adjacent machine received from the adjacent machine connected by the adjacent machine connection line, and an own machine held in the temporary logical identifier holding means. Stored in the temporary logical identifier of the machine and the temporary logical identifier storing means of the adjacent machine. Temporary logical identifier integration means for transmitting neighboring machine information including a pair with a temporary logical identifier of an adjacent machine to the control device through the network, and an actual logical identifier of the own machine received from the control device through the network. A logical identifier holding unit; and a machine connection relation determining unit that determines a connection order of the plurality of machines by the adjacent machine connection line based on adjacent machine information transmitted from the respective machines to the control device. And real logic identifier distributing means for determining and distributing real logical identifiers to be given to the plurality of machines according to the connection order of the plurality of machines determined by the machine connection relation determining means.

  According to a second logical identifier automatic setting device of the present invention, in the first logical identifier automatic setting device, one of the adjacent machine connection units connects an adjacent machine that is connected behind when viewed from the own machine. An adjacent machine connection unit, and another one of the adjacent machine connection units is an output side adjacent machine connection unit that connects an adjacent machine connected in front of the own machine, and the temporary logical identifier holding means is the temporary machine identifier holding unit. The logical identifier is transmitted to an adjacent machine through an adjacent machine connection line connected to the output side adjacent machine connection unit, and the machine connection relation determining means starts the machine whose adjacent machine information does not include the temporary logical identifier of the adjacent machine. The connection order is extracted as follows.

  According to a third logical identifier automatic setting device of the present invention, in the first logical identifier automatic setting device, the temporary logical identifier holding unit includes all the adjacent machine connection units that connect the temporary logical identifier of the own machine to the adjacent machine connection line. To the adjacent machine, and the machine connection relation determining means extracts a connection order starting from a head machine provided separately.

  According to a fourth logical identifier automatic setting device of the present invention, in the third logical identifier automatic setting device, the machine connection relation determining means sets each head machine as the head when information on the head machine is given for each group. The connection order of each group that does not include other head machines is extracted, and the real logical identifier distributing means knows the group to which the real logical identifier belongs and connects the machine for each group from the real logical identifier value. It is characterized by distributing real logic identifiers that show the relationship.

  A fifth logical identifier automatic setting device according to the present invention is a logical identifier automatic setting device in a communication system in which a plurality of machines are connected to a network via a network interface, and each machine is connected to a communication medium different from the network. At least two adjacent machine connection units for connecting to another machine through a certain adjacent machine connection line, logical identifier holding means for holding a logical identifier received from the adjacent machine connection unit, and held in the logical identifier holding unit Logical identifier propagation means for transmitting the logical identifier obtained by incrementing or decrementing the logical identifier by a predetermined value to the adjacent machine from another adjacent machine connection unit connected to the adjacent machine connection line.

  A sixth logical identifier automatic setting device of the present invention is a logical identifier automatic setting device in a communication system in which a plurality of machines are connected to a network through a network interface, and each machine is connected to a communication medium different from the network. Logical identifier holding means for holding at least two adjacent machine connections for connecting to another machine via a certain adjacent machine connection line, and a logical identifier obtained by incrementing or decrementing a logical identifier received from the adjacent machine connection by a predetermined value And a logical identifier propagation means for transmitting the logical identifier held in the logical identifier holding means from the other adjacent machine connection unit connected to the adjacent machine connection line to the adjacent machine.

  A first logical identifier automatic setting method according to the present invention is a logical identifier automatic setting method in a communication system in which a plurality of machines are connected to a network through a network interface, and is an adjacent machine connection line which is a communication medium different from the network. , A first step of connecting a plurality of machines, a second step of the control machine connected to the network distributing a temporary logical identifier without duplication to each of the machines, and a machine adjacent to each other A third step of transmitting the temporary logical identifier of the own machine to the first machine, and each machine transmits adjacent machine information including a set of the temporary logical identifier of the own machine and the temporary logical identifier received from the adjacent machine to the control machine. A fourth step and the control machine, based on the adjacent machine information received from each machine, the adjacent machine connection line A fifth step of determining the connection order of a plurality of machines, and a sixth step of determining and distributing real logic identifiers to be given to the plurality of machines by the control machine according to the determined connection order of the plurality of machines It is characterized by including.

  The second logical identifier automatic setting method of the present invention is a logical identifier automatic setting method in a communication system in which a plurality of machines are connected to a network through a network interface, and is an adjacent machine connection line which is a communication medium different from the network. Using a first step of connecting a plurality of machines, and a logical identifier of the own machine by a predetermined value in order from the first machine to the last machine in the connection order of the plurality of machines by the adjacent machine connection line And a second step of transmitting the incremented or decremented logical identifier as the logical identifier of the adjacent machine to the adjacent machine connected by the adjacent machine connection line.

  A third logical identifier automatic setting method according to the present invention is a logical identifier automatic setting method in a communication system in which a plurality of machines are connected to a network through a network interface, and is an adjacent machine connection line which is a communication medium different from the network. Using the first step of connecting a plurality of machines, the received logical identifier is incremented or decremented in order from the first machine to the last machine in the connection order of the plurality of machines by the adjacent machine connection line. A second step of holding the logical identifier as a logical identifier of the own machine and transmitting the logical identifier to an adjacent machine connected by the adjacent machine connection line.

  A first communication device of the present invention is a communication device connected to a network by a network interface, and at least two adjacent devices for connecting to another machine by an adjacent machine connection line which is a communication medium different from the network. A machine connection unit, temporary logical identifier holding means for holding a temporary logical identifier of a local machine distributed from a control machine connected to the network, and the adjacent machine received from an adjacent machine connected by the adjacent machine connection line Adjacent machine temporary logical identifier holding means, the temporary logical identifier of the own machine held in the temporary logical identifier holding means, and the adjacent machine temporary logical identifier holding means held in the adjacent machine temporary logical identifier holding means. Neighboring machine information including a pair with a temporary logical identifier is transmitted to the control machine through the network. And the temporary logical identifier integration means for signal, characterized in that it comprises a real logical identifier holding means for holding the real logical identifier of the machine received from the control machine through the network.

  The second communication device of the present invention is a communication device connected to a network by a network interface, and at least two adjacent devices for connecting to another machine by an adjacent machine connection line which is a communication medium different from the network. A machine connection unit, a logical identifier holding unit that holds the logical identifier received from the adjacent machine connection unit, and a logical identifier obtained by incrementing or decrementing the logical identifier held in the logical identifier holding unit by a predetermined value. And a logical identifier propagation means for transmitting to the adjacent machine from another adjacent machine connection unit to which the line is connected.

  A third communication device of the present invention is a communication device connected to a network by a network interface, and at least two adjacent devices for connecting to another machine by an adjacent machine connection line which is a communication medium different from the network. A machine connection unit, a logical identifier holding unit that holds a logical identifier obtained by incrementing or decrementing the logical identifier received from the adjacent machine connection unit by a predetermined value, and a logical identifier held in the logical identifier holding unit. And a logical identifier propagation means for transmitting to the adjacent machine from another adjacent machine connection unit to which the line is connected.

  The control device of the present invention is a control device capable of communicating with a plurality of machines connected to each other using an adjacent machine connection line which is a communication medium different from a network interface connected to a network, Temporary logical identifier distributing means for distributing a temporary logical identifier, and the adjacent machine connection line based on adjacent machine information including a set of the temporary logical identifier of each machine and the temporary logical identifier of the adjacent machine transmitted from each machine And determining and distributing a real logical identifier to be given to the plurality of machines according to the connection order of the plurality of machines determined by the machine connection relation determining unit. And a real logical identifier distributing means.

"Action"
Each machine to be set with a logical identifier has at least two adjacent machine connection units for connecting to other machines via an adjacent machine connection line that is a communication medium different from the network used for communication. The system administrator can connect the machines to each other as desired regardless of the connection order of the machines via the network. When each machine is connected by the adjacent machine connection line, the logical identifier is distributed according to the connection order.

  According to the present invention, a logical identifier can be set as intended by a system administrator for a plurality of machines that are communicably connected via a network. The reason is that the logical identifier to be distributed is determined according to the connection relationship between machines determined by the adjacent machine connection line by the system administrator.

“First Embodiment”
Referring to FIG. 1, in the first embodiment of the present invention, a plurality of machines 100 and a single control machine 200 are connected to a network 300.

  The control machine 200 is a computer having a function of distributing a logical identifier to each machine 100, and includes a network interface 201, a temporary logical identifier distributing unit 202, a machine connection relation determining unit 203, a real logical identifier distributing unit 204, and a storage unit. 205.

  The network interface 201 is a connection unit between the control machine 200 and the network 300, and data that enters and exits between the control machine 200 and the network 300 passes through the network interface 201.

  The temporary logical identifier distributing unit 202 is realized by a DHCP server or the like, and distributes a temporary logical identifier, which is a logical identifier temporarily used in response to a request from each machine 100, to each machine 100. The temporary logical identifier is distributed to each machine 100 without duplication, but what value the temporary logical identifier is distributed to which machine 100 is undefined. That is, the temporary logical identifier distributed to each machine 100 is a random value.

  The machine connection relation determination unit 203 is configured to determine whether the plurality of machines 100 will be described later based on adjacent machine information including a set of the temporary logical identifier of the own machine and the temporary logical identifier of the adjacent machine sent from each machine 100. It is a means for discriminating how the interconnections are interconnected.

  The real logical identifier distribution unit 204 determines a real logical identifier that is a logical identifier used in actual processing of each machine 100 based on the connection relationship of the plurality of machines 100 determined by the machine connection relationship determination unit 203, and distributes It is means to do. The real logical identifier of each machine 100 is determined so that the connection relationship between the adjacent machine connection lines 400 of the plurality of machines 100 can be uniquely determined by the arrangement of the values of the real logical identifiers distributed to all the machines 100. For example, when three machines A, B, and C are connected in a daisy chain by adjacent machine connection lines 400 in this order, for example, the value is 1 for machine A, the value 2 for machine B, and the value for machine C. 3 real logical identifiers are distributed.

  The storage unit 205 temporarily stores correspondence information between the distributed temporary logical identifier and the distribution destination machine, collected neighboring machine information, and the like.

  In this embodiment, the temporary logical identifier distributing unit 202, the machine connection relation determining unit 203, and the real logical identifier distributing unit 204 are arranged in the same control machine 200, but these units are physically different from each other. It can also be placed on a machine.

  Each machine 100 is a computer that receives the setting of a logical identifier from the control machine 200, and includes a network interface 101, a temporary logical identifier holding unit 102, an adjacent machine temporary logical identifier holding unit 103, a temporary logical identifier integration unit 104, and a real logical identifier. Means 105, an input side adjacent machine connection unit 106, an output side adjacent machine connection unit 107, and a processing unit 108 are provided.

  The network interface 101 is a connection unit between the machine 100 and the network 300, and data that enters and exits between the machine 100 and the network 300 passes through the network interface 101.

  The input side adjacent machine connection unit 106 and the output side adjacent machine connection unit 107 are means for connecting the own machine 100 and another machine 100 by the adjacent machine connection line 400. As the adjacent machine connection line 400, RC232C, Ethernet, USB, wireless, or the like is used. In the case of the present embodiment, the connection direction is fixed, and the other machine 100 connected to the back as viewed from the own machine 100 is connected using the input side adjacent machine connection unit 106 and connected in front of the own machine 100. The machine 100 is connected using the output side adjacent machine connection unit 107.

  The temporary logical identifier holding unit 102 holds the temporary logical identifier distributed from the temporary logical identifier distribution unit 202 of the control machine 200 to the own machine 100. Also, in accordance with an instruction from the machine connection relation determination unit 203 of the control machine 200, the held temporary logical identifier is transmitted to the other machine 100 behind by the output side adjacent machine connection unit 107 via the adjacent machine connection line 400. Has function.

  The adjacent machine temporary logical identifier holding unit 103 holds the temporary logical identifier of the adjacent machine received by the input side adjacent machine connection unit 106 from the other machine 100 via the adjacent machine connection line 400.

  The temporary logical identifier integrating unit 104 is connected to the temporary logical identifier of the own machine 100 held in the temporary logical identifier holding unit 102 and the rear of the own machine 100 held in the adjacent machine temporary logical identifier holding unit 103. The network interface 101 has a function of transmitting neighboring machine information including a pair with the temporary logical identifier of the other machine 100 to the machine connection relation determining unit 203 of the control machine 200 via the network 300. The temporary logical identifier held in the temporary logical identifier holding unit 102 is used as the identifier of the own machine 100 at the time of communication.

  The real logical identifier holding unit 105 holds the real logical identifier distributed to the own machine 100 from the real logical identifier distribution unit 204 of the control machine 200.

  The processing unit 108 is a part that executes some application program on the machine 100. The application program to be executed may be the same on all the machines 100 or may be different. When communicating with another machine 100 or the like via the network 300, the processing unit 108 uses the real logical identifier held in the real logical identifier holding unit 105 as the identifier of the own machine 100.

  Next, the operation of the present embodiment will be described.

  After constructing a communication system in which the plurality of machines 100 and the control machine 200 are connected to the network 300, the system administrator connects the plurality of machines 100 by the adjacent machine connection line 400 (step S101 in FIG. 2). In the case of the present embodiment, the value of the real logical identifier set for each machine 100 is determined by what number the machine 100 is connected to from the top. Decide. For example, if it is desired to set a plurality of machines 100 arranged on the floor so as to increase an actual logical identifier whose value increases in the arrangement order, the machines 100 are connected in the same order as the arrangement.

  Next, a temporary logical identifier is set to each machine 100 by the control machine 200 (step S102). Specifically, the temporary logical identifier holding unit 102 of the machine 100 connected to the network 300 requests a logical identifier from the network 300 through the network interface 101. When receiving the request, the temporary logical identifier distributing unit 202 of the control machine 200 distributes a logical identifier that does not overlap between the machines in the network to the requested machine 100. The logical identifier distributed at this time is random, and there is no guarantee that the same machine 100 is distributed the same logical identifier for each request. This mechanism can be realized by DHCP or the like. The temporary logical identifier holding unit 102 of the machine 100 holds the logical identifier distributed from the temporary logical identifier distribution unit 202 of the control machine 200 as a temporary logical identifier. On the other hand, in the control machine 200, the correspondence relationship between the distributed temporary logical identifier and the information (for example, MAC address) of the machine 100 is held in the storage unit 205.

  Next, when the setting of temporary logical identifiers for all the machines 100 is completed, real logical identifiers are set (step S103). Then, the system operation including communication processing using the real logical identifier set in each machine 100 is performed (step S104). Details of the real logical identifier setting process in step S103 will be described below.

  First, the machine connection relation determination unit 203 of the control machine 200 refers to the storage unit 205 and sends a message instructing all the machines 100 that have received the provisional logical identifier to transmit the temporary logical identifier to an adjacent machine. Transmission is performed via the network 300 by the network interface 201 (step S111 in FIG. 3). A temporary logical identifier is used for communication at this time.

  When the temporary logical identifier holding unit 102 of each machine 100 receives an instruction to transmit the temporary logical identifier to an adjacent machine from the control machine 200 (step S121 in FIG. 4), the temporary logical identifier of the own machine held is output on the output side. The data is transmitted to the adjacent machine 100 by the adjacent machine connection unit 107 (step S122). However, such transmission is not performed when the adjacent machine 100 is not connected to the output side adjacent machine connection unit 107 through the adjacent machine connection line 400.

  Next, the adjacent machine temporary logical identifier holding unit 103 of each machine 100 receives the temporary logical identifier of the adjacent machine 100 from the input side adjacent machine connection unit 106 (step S123). However, such reception is not performed when the adjacent machine 100 is not connected to the input-side adjacent machine connection unit 106 through the adjacent machine connection line 400.

  Next, the temporary logical identifier integrating unit 104 of each machine 100 includes the temporary logical identifier of the own machine held in the temporary logical identifier holding unit 102 and the temporary machine temporary logical identifier held in the adjacent machine temporary logical identifier holding unit 103. Neighboring machine information including a pair with a logical identifier is transmitted to the control machine 200 via the network 300 by the network interface 101 (step S124). However, if the temporary logical identifier of the adjacent machine is not held in the adjacent machine temporary logical identifier holding unit 103, the adjacent machine information with the temporary logical identifier of the adjacent machine as a NULL value is transmitted.

  The machine connection relation determination unit 203 of the control machine 200 receives the neighboring machine information from each machine 100 and stores it in the storage unit 205 (step S112 in FIG. 3). When the adjacent machine information is received from all the machines 100, it is analyzed to determine the connection relationship of the machines 100, and the result is stored in the storage means 205 (step S113).

  The real logical identifier holding unit 105 of each machine 100 holds the real logical identifier received from the control machine 200 (step S125 in FIG. 4). Thereafter, this real logical identifier is used as the logical identifier of the own machine.

  The real logical identifier distributing unit 204 of the control machine 200 determines the real logical identifier of each machine 100 based on the connection relation of all the machines 100 stored in the storage unit 205, and each network interface 201 via the network 300 determines each real logical identifier. It is distributed to the machine 100 (step S114).

  Next, the operation of the present embodiment will be described in more detail with a specific example.

Specific example 1 of the first embodiment:
As a specific example, in a communication system in which four machines A, B, C, D and a control machine 200 are connected to a network 300 as shown in FIG. 5, machine A → machine B → machine C → machine D A case where a real logical identifier starting from 1 is set in the order of arrangement will be taken up.

  First, the system administrator uses the adjacent machine connection line 400 to input the output side adjacent machine connection unit 107 of the machine A and the input side adjacent machine connection unit 106 of the machine B, the output side adjacent machine connection unit 107 of the machine B, and the input of the machine C. The side adjacent machine connection unit 106, the output side adjacent machine connection unit 107 of the machine C, and the input side adjacent machine connection unit 106 of the machine D are connected.

  Next, the machines A to D request the logical identifier from the network 300 in order to automatically set the logical identifier. When the temporary logical identifier distributing unit 202 of the control machine 200 receives the request, it distributes the logical identifier to the requested machine so as not to be duplicated among the machines in the network. As a result of this operation, for example, as shown in FIG. 5, it is assumed that logical identifiers 4 are distributed to machine A, 1 to machine B, 3 to machine C, and 2 to machine D.

  Next, the machine connection relation determination unit 203 of the control machine 200 instructs the machines A to D to transmit temporary logical identifiers. Receiving the instruction, the machines A to C transmit the temporary logical identifiers of their own machines from the output side adjacent machine connection unit 107 to the adjacent machines through the adjacent machine connection line 400. The machine D does nothing because the adjacent machine connection line 400 is not connected to the output side adjacent machine connection unit 107.

  Next, the adjacent machine temporary logical identifier holding unit 103 of the machines B, C, and D receives the temporary logical identifier from the input side adjacent machine connection unit 106 and holds the received temporary logical identifier of the adjacent machine. The machine A does nothing because the adjacent machine connection line 400 is not connected to the input side adjacent machine connection unit 106. As a result of this operation, the adjacent machine temporary logical identifier holding unit 103 of the machine A has a NULL value indicating nothing, the adjacent machine temporary logical identifier holding unit 103 of the machine B is 4, and the adjacent machine temporary logical identifier holding unit 103 of the machine C is stored. 1, each temporary logical identifier 3 is stored in the adjacent machine temporary logical identifier holding unit 103 of the machine D.

  Next, the temporary logical identifier integration unit 104 of each of the machines A to D includes the temporary logical identifier of the own machine stored in the temporary logical identifier storage unit 102 and the adjacent storage stored in the adjacent machine temporary logical identifier storage unit 103. Neighboring machine information including a pair with the temporary logical identifier of the machine is transmitted to the control machine 200 via the network 300. The machine connection relation determination unit 203 of the control machine 200 receives adjacent machine information of each machine and stores it in the storage unit 205. FIG. 6 shows the contents of the adjacent machine information of each machine at this time.

  Next, the machine connection relation determining unit 203 determines the connection relation of each machine by the adjacent machine connection line 400 according to the following procedure based on the adjacent machine information of each machine.

  (1) A machine whose temporary logical identifier of an adjacent machine is a NULL value is set as the head. Therefore, the leading machine is machine A.

(2) In order to check a machine connected behind each machine, a machine whose temporary logical identifier of the own machine is a temporary logical identifier of an adjacent machine is searched. The result is as follows.
-The temporary logical identifier of the machine A's own machine is 4, and the machine with the temporary logical identifier 4 of the adjacent machine is the machine B, so the machine A is behind the machine B.
-Machine B's own machine's temporary logical identifier is 1, and the machine whose neighboring machine's temporary logical identifier is 1 is machine C, so machine B is behind machine C.
-The temporary logical identifier of the machine C's own machine is 3, and the machine with the temporary logical identifier 3 of the adjacent machine is the machine D, so the machine C is behind the machine D.
-The temporary logical identifier of the own machine of the machine D is 2, and there is no machine whose temporary logical identifier of the adjacent machine is 2. Therefore, the last machine is machine D.

  (3) From the result of (2) above, it can be seen that the machines A to D are connected in the order of 4 → 1 → 3 → 2 as temporary logical identifiers.

  Next, the real logical identifier distributing unit 204 distributes logical identifiers to the machines A to D based on the connection relationships of the machines A to D determined by the machine connection relationship determining unit 203. In this example, the temporary logical identifier is 1, the temporary logical identifier is 1, and the temporary logical identifier is 1, the temporary logical identifier is 1, so that the connection relationship between the machines A to D can be understood from the sequence of logical identifier values. 3 is distributed to the machine C having 3 and 4 is allocated to the machine D having the temporary logical identifier 2. By this operation, the real logical identifier holding unit 105 of the machine A is 1, the real logical identifier holding unit 105 of the machine B is 2, the temporary logical identifier holding unit 105 of the machine C is 3, and the temporary logical identifier of the machine D is held. The means 105 stores 4 logical identifiers.

  Such a procedure makes it possible to set a real logical identifier that can uniquely identify the connection position of the machine. For example, it can be immediately recognized that the machine C having the real logical identifier 3 is the third machine counted from the top.

  In this example, the number of machines to which logical identifiers are set is four. However, the present invention is applicable to two or more machines.

  Next, the effect of this embodiment will be described.

  According to the present embodiment, logical identifiers can be set as intended by the system administrator for a plurality of machines 100 connected to be communicable with each other via the network 300. The reason is that if the system administrator defines the connection relationship of the machines 100 by the adjacent machine connection line 400, the real logical identifier of each machine 100 is determined according to the connection relationship.

  Further, according to the present embodiment, since the connection direction by the adjacent machine connection line 400 is fixed, the machine in which no other machine is connected to the input side adjacent machine connection unit 106 automatically becomes the top machine. Therefore, unlike the second embodiment described later, the system administrator does not need to separately designate the first machine.

  In the above description, it has been described that the intention of the system administrator is to set a logical identifier so that the physical arrangement of the machines 100 can be uniquely identified. As a result, the physical location of the machine can be grasped from the logical identifier, the maintenance of the machine is facilitated, and the execution machine of the application is selected in consideration of the physical location of the machine, thereby distributing the heat generation in the machine group. The effect that it can be expected. However, the present invention is not limited to a usage form in which a logical identifier is automatically set so that the physical position of the machine can be grasped. For example, machine A, machine B, machine C, and machine D are physically arranged in the order, but machine A and machine C execute one application X, and machine B and machine D execute another application Y. In the case of execution, if the machine A → machine C → machine B → machine D are connected in the order of adjacent machine connection lines, the logical identifiers 1 and 2 are assigned to the machines A and C, and the logical identifiers are assigned to the machines B and D 3 and 4 can be set. This makes it easy to know the type of application to be executed from the logical identifier.

“Second Embodiment”
Referring to FIG. 7, in the second embodiment of the present invention, compared to the first embodiment shown in FIG. 1, the machine 100 has temporary logical identifier holding means 102, adjacent machine temporary logical identifier holding. Instead of the means 103, the input side adjacent machine connection unit 106 and the output side adjacent machine connection unit 107, a temporary logical identifier holding unit 112, an adjacent machine temporary logical identifier holding unit 113, an adjacent machine connection unit 116 and an adjacent machine connection unit 117 are provided. The difference is that the control machine 200 includes a machine connection relationship determination unit 213 instead of the machine connection relationship determination unit 203 and is connected to the input device 600.

  The adjacent machine connection units 116 and 117 of each machine 100 connect the own machine 100 and another machine 100 to adjacent machine connection lines as compared to the input side adjacent machine connection unit 106 and the output side adjacent machine connection unit 107 of FIG. 400 is the same as the means for connection by 400, but differs in that there is no distinction between the input side and the output side. Therefore, the other machine 100 connected to the back as viewed from the own machine 100 and the other machine 100 connected in front of the own machine 100 may be connected to any of the two adjacent machine connection units 116 and 117. In the present embodiment, each machine 100 is provided with two adjacent machine connection units 116 and 117, but may be provided with three or more adjacent machine connection units.

  The temporary logical identifier holding unit 112 is different from the temporary logical identifier holding unit 102 in FIG. 1 in that the temporary logical identifier distributed from the temporary logical identifier distribution unit 202 of the control machine 200 to the own machine 100 is stored. The same is true, but in accordance with an instruction from the machine connection relation determination unit 213 of the control machine 200, all the adjacent machines have the temporary logical identifier held by the adjacent machine connection units 116 and 117 to which the adjacent machine connection line 400 is connected. 100 is different in that it is transmitted to 100.

  The adjacent machine temporary logical identifier holding unit 113 holds the temporary logical identifier of the adjacent machine received from the other machine 100 via the adjacent machine connection line 400, as compared with the adjacent machine temporary logical identifier holding unit 103 of FIG. The point is the same, except that the temporary logical identifiers are received and held from all the neighboring machines.

  Compared with the machine connection relation determining means 203 of FIG. 1, the machine connection relation determining means 213 of the control machine 200 is a set of the temporary logical identifier of the own machine and the temporary logical identifier of the adjacent machine sent from each machine 100. Is the same in that it determines how a plurality of machines 100 are interconnected by adjacent machine connection lines based on adjacent machine information including the difference between the input side and output side adjacent machines of each machine 100. Therefore, it is different in that the connection relation is determined using information on the head machine 100 separately given from the system administrator.

  The input device 600 receives information on the head machine from the system administrator and stores it in the storage unit 205. The stored information on the head machine is referred to by the machine connection relation determining unit 213.

  Next, the operation of the present embodiment will be described focusing on the differences from the first embodiment.

  After constructing a communication system in which the plurality of machines 100 and the control machine 200 are connected to the network 300, the system administrator connects the plurality of machines 100 by the adjacent machine connection line 400 (step S101 in FIG. 2). This connection operation is basically the same as that of the first embodiment. However, when the adjacent machine 100 is connected to a certain machine 100, it is connected to either the adjacent machine connection unit 116 or the adjacent machine connection unit 117. However, the points may be different.

  Next, a temporary logical identifier is set for each machine 100 by the control machine 200 in the same manner as in the first embodiment (step S102).

  Next, when the setting of temporary logical identifiers for all the machines 100 is completed, real logical identifiers are set (step S103). Then, the system operation including communication processing using the real logical identifier set in each machine 100 is performed (step S104). Details of the real logical identifier setting process in step S103 will be described below.

  First, the machine connection relation determination unit 213 of the control machine 200 refers to the storage unit 205 and sends a message instructing all the machines 100 that have received the temporary logical identifier to transmit the temporary logical identifier to an adjacent machine. Transmission is performed via the network 300 by the network interface 201 (step S111 in FIG. 3). A temporary logical identifier is used for communication at this time.

  When the temporary logical identifier holding unit 112 of each machine 100 receives an instruction to transmit the temporary logical identifier to the adjacent machine from the control machine 200 (step S221 in FIG. 8), the temporary logical identifier of the own machine held is stored in the adjacent machine. The transmission is transmitted to the adjacent machine 100 by all the adjacent machine connection units 116 and 117 to which the connection line 400 is connected (step S222).

  Next, the adjacent machine temporary logical identifier holding unit 113 of each machine 100 receives the temporary logical identifier of the adjacent machine 100 from all the adjacent machine connection units 116 and 117 to which the adjacent machine connection line 400 is connected (step S223). .

  Next, the temporary logical identifier integrating unit 104 of each machine 100 includes the temporary logical identifier of the own machine held in the temporary logical identifier holding unit 112 and all adjacent machines held in the adjacent machine temporary logical identifier holding unit 113. The adjacent machine information including the pair with the temporary logical identifier is transmitted to the control machine 200 via the network 300 by the network interface 101 (step S224).

  The machine connection relation determination unit 213 of the control machine 200 receives the neighboring machine information from each machine 100 and stores it in the storage unit 205 (step S112 in FIG. 3). When the adjacent machine information is received from all the machines 100, it is analyzed to determine the connection relationship of the machines 100, and the result is stored in the storage means 205 (step S113). At the time of this analysis, in the present embodiment, the connection relationship between the plurality of machines 100 is determined using the top machine information given from the system administrator through the input device 600.

  The real logical identifier distributing unit 204 of the control machine 200 determines the real logical identifier of each machine 100 based on the connection relation of all the machines 100 stored in the storage unit 205, and each network interface 201 via the network 300 determines each real logical identifier. It is distributed to the machine 100 (step S114).

  Next, the operation of the present embodiment will be described in more detail with a specific example.

Specific example 1 of the second embodiment 1:
As a specific example, in a communication system in which four machines A, B, C, and D and a control machine 200 are connected to a network 300 as shown in FIG. 9, machine A → machine B → machine C → machine D A case where a real logical identifier starting from 1 is set in the order of arrangement will be taken up.

  First, the system administrator uses the adjacent machine connection line 400 to connect the adjacent machine connection unit 117 of the machine A and the adjacent machine connection unit 116 of the machine B, the adjacent machine connection unit 117 of the machine B, the adjacent machine connection unit 116 of the machine C, the machine The adjacent machine connection unit 117 of C and the adjacent machine connection unit 116 of the machine D are connected. Further, the fact that the machine A is the head machine is input from the input device 600 and stored in the storage unit 205.

  Next, the machines A to D request the logical identifier from the network 300 in order to automatically set the logical identifier. When the temporary logical identifier distributing unit 202 of the control machine 200 receives the request, it distributes the logical identifier to the requested machine so as not to be duplicated among the machines in the network. By this operation, for example, as shown in FIG. 9, it is assumed that the logical identifiers 4 are distributed to the machine A, 1 to the machine B, 3 to the machine C, and 2 to the machine D.

  Next, the machine connection relation determination unit 213 of the control machine 200 instructs the machines A to D to transmit temporary logical identifiers. Receiving the instruction, the machines A to D transmit the temporary logical identifiers of their own machines to the adjacent machines from the adjacent machine connection units 116 and 117 to which the adjacent machine connection line 400 is connected.

  Next, the adjacent machine temporary logical identifier holding unit 113 of the machines A to D receives the temporary logical identifier from the adjacent machine connection units 116 and 117 to which the adjacent machine connection line 400 is connected, and receives the received temporary logical identifier of the adjacent machine. Hold. By this operation, the adjacent machine temporary logical identifier holding unit 113 of the machine A is 1, the adjacent machine temporary logical identifier holding unit 113 of the machine B is 4 and 3, and the adjacent machine temporary logical identifier holding unit 113 of the machine C is 1 2 and 3, each temporary logical identifier of 3 is stored in the temporary machine logical identifier holding unit 113 adjacent to the machine D.

  Next, the temporary logical identifier integrating unit 104 of each of the machines A to D, the temporary logical identifier of the own machine stored in the temporary logical identifier holding unit 112, and the adjacent stored in the adjacent machine temporary logical identifier holding unit 113. Neighboring machine information including a pair with the temporary logical identifier of the machine is transmitted to the control machine 200 via the network 300. The machine connection relation determination unit 213 of the control machine 200 receives adjacent machine information of each machine and stores it in the storage unit 205. FIG. 10 shows the contents of the adjacent machine information of each machine at this time. In the adjacent machine information of the machine A and the machine D, the temporary logical identifier of the second adjacent machine is a NULL value, but it is not necessary to hold such a value.

  Next, the machine connection relation determination unit 213 determines the connection relation of each machine by the adjacent machine connection line 400 according to the following procedure based on the adjacent machine information of each machine and the information that the machine A is the head machine.

(1) From the adjacent machine information of each machine, a pair of the temporary logical identifier of its own indicating the adjacent relationship and the temporary logical identifier of the adjacent machine (hereinafter referred to as an adjacent pair) is extracted.
1. Adjacent pair of machine A: (4, 1)
2. Adjacent pair of machine B: (1, 4), (1, 3)
3. Adjacent pair of machine C: (3, 1), (3, 2)
4). Adjacent pair of machine D: (2, 3)

(2) The adjacency relationship for each temporary logical identifier is restored.
1. The combinations including the temporary logical identifier 4 are (4, 1) and (1, 4). From this information, it can be seen that 1 and 4 are adjacent to each other as (1-4).
2. The combinations including the temporary logical identifier 1 are (4, 1), (1, 4), (1, 3), (3, 1). From this information, it can be seen that 1, 3, and 4 are adjacent to each other with 1 as (4-1-3).
3. The combinations including the temporary logical identifier 3 are (1, 3), (3, 1), (3, 2), (2, 3). From this information, it can be seen that 1, 2, and 3 are adjacent to each other with 3 interposed therebetween, such as (1-3-2).
4). The combinations including the temporary logical identifier 2 are (3, 2) and (2, 3). From this information, it can be seen that 2 and 3 are adjacent to each other as (2-3).

  (3) The adjacent relationships (1-4), (4-1-3), (1-3-2), and (2-3) created in (2) are merged. For example, (1-2) represents an adjacency and is equivalent to (2-1). Similarly, (1-2-3) and (3-2-1) are equivalent. Further, the merge of (1-2) and (1-2-3) is (1-2-3) because the portion (1-2) overlaps. The merge of (1-2-3) and (2-3-4) is (1-2-3-4) because the portion (2-3) overlaps. That is, it is as follows.

1. (1-4) + (4-1-3) → (4-1) + (4-1-3) → (4-1-3)
2. (4-1-3) + (1-3-2) → (4-1-3-2)
3. (4-1-3-2) + (2-3) → (4-1-3-2) + (3-2) → (4-1-3-2)

  (4) The final result is derived from the result of (3) and the information of the head machine. Since the first machine is machine A, it can be seen that the temporary logical identifiers are arranged in the order of 4 → 1 → 3 → 2. That is, the final result is machine A → machine B → machine C → machine D.

  Next, the real logical identifier distributing unit 204 distributes logical identifiers to the machines A to D based on the connection relationships of the machines A to D determined by the machine connection relationship determining unit 203. In this example, the temporary logical identifier is 1, the temporary logical identifier is 1, and the temporary logical identifier is 1, the temporary logical identifier is 1, so that the connection relationship between the machines A to D can be understood from the sequence of logical identifier values. 3 is distributed to the machine C having 3 and 4 is allocated to the machine D having the temporary logical identifier 2. By this operation, the real logical identifier holding unit 105 of the machine A is 1, the real logical identifier holding unit 105 of the machine B is 2, the temporary logical identifier holding unit 105 of the machine C is 3, and the temporary logical identifier of the machine D is held. The means 105 stores 4 logical identifiers.

  By such a procedure, the connection position of the machine can be uniquely identified from the real logical identifier. For example, it can be immediately recognized that the machine C having the real logical identifier 3 is the third machine counted from the top.

  In this example, the number of machines to which logical identifiers are set is four. However, the present invention is applicable to two or more machines.

Specific example 2 of the second embodiment:
As a specific example, as shown in FIG. 11, in a communication system having nine machines A to I, machines A, B, and C are group a, machines D, E, and F are group b, machines G, H, and I. Is grouped as a group c, and a case where a real logical identifier is set for each group in the order of machines is taken up. In FIG. 11, the network 300 and the control machine 200 to which the machines A to I are connected are not shown.

  First, the system administrator sequentially connects from the first machine to the last machine for each group through the adjacent machine connection line 400. Specifically, for the group a, the adjacent machine connection line 117 of the machine A and the adjacent machine connection part 116 of the machine B, and the adjacent machine connection part 117 of the machine B and the adjacent machine connection part of the machine C are connected by the adjacent machine connection line 400. 116 is connected. In addition, for the group b, the adjacent machine connection line 117 of the machine D and the adjacent machine connection part 116 of the machine E are connected by the adjacent machine connection line 400, and the adjacent machine connection part 117 of the machine E and the adjacent machine connection part 116 of the machine F are connected. To do. Further, for the group c, the adjacent machine connection line 117 of the machine G and the adjacent machine connection part 116 of the machine H are connected by the adjacent machine connection line 400, and the adjacent machine connection part 116 of the machine H and the adjacent machine connection part 116 of the machine I are connected. To do. Further, the head machines in the group are connected by the adjacent machine connection line 400. Specifically, the adjacent machine connection line 116 of the machine A, the adjacent machine connection part 116 of the machine D, and the newly provided third adjacent machine connection part of the machine D and the adjacent machine G are connected by the adjacent machine connection line 400. The machine connection unit 116 is connected. Further, the input device 600 inputs that the machine A, the machine D, and the machine G are the first machine in the group, and stores them in the storage unit 205.

  Next, the machines A to I request the logical identifier from the network 300 in order to automatically set the logical identifier. When the temporary logical identifier distributing unit 202 of the control machine 200 receives the request, it distributes the logical identifier to the requested machine so as not to be duplicated among the machines in the network. By this operation, for example, as shown in FIG. 11, the machine A is 4, the machine B is 2, the machine C is 7, the machine D is 1, the machine E is 9, the machine F is 3, and the machine F is 3. It is assumed that 5 is assigned to G, 6 is assigned to machine H, and 8 is assigned to machine I.

  Next, the machine connection relation determination unit 213 of the control machine 200 instructs the machines A to I to transmit temporary logical identifiers. Receiving the instruction, the machines A to I transmit the temporary logical identifiers of their own machines from the adjacent machine connection unit to which the adjacent machine connection line 400 is connected to the adjacent machines.

  Next, the adjacent machine temporary logical identifier holding unit 113 of the machines A to I receives the temporary logical identifier from the adjacent machine connection unit to which the adjacent machine connection line 400 is connected, and holds the received temporary logical identifier of the adjacent machine. By this operation, 1 and 2 are stored in the adjacent machine temporary logical identifier holding unit 113 of the machine A, 4 and 7 are stored in the adjacent machine temporary logical identifier holding unit 113 of the machine B, and the adjacent machine temporary logical identifier holding unit 113 of the machine C is stored. 2, 4, 5, and 9 in the adjacent machine temporary logical identifier holding unit 113 of the machine D, 1 and 3 in the adjacent machine temporary logical identifier holding unit 113 of the machine E, and the adjacent machine temporary logical identifier holding unit 113 of the machine F. 9, 1 and 6 in the adjacent machine temporary logical identifier holding unit 113 of the machine G, 5 and 8 in the adjacent machine temporary logical identifier holding unit 113 of the machine H, and the adjacent machine temporary logical identifier holding unit 113 of the machine I. Each temporary logical identifier of 6 is stored.

  Next, the temporary logical identifier integrating unit 104 of each of the machines A to I includes the temporary logical identifier of the own machine stored in the temporary logical identifier holding unit 112 and the adjacent logical unit stored in the adjacent machine temporary logical identifier holding unit 113. Neighboring machine information including a pair with the temporary logical identifier of the machine is transmitted to the control machine 200 via the network 300. The machine connection relation determination unit 213 of the control machine 200 receives adjacent machine information of each machine and stores it in the storage unit 205. FIG. 12 shows the contents of the adjacent machine information of each machine at this time. Although a NULL value is set in the temporary logical identifier of the adjacent machine, it is not necessary to hold such a value.

  Next, the machine connection relation determination unit 213 connects the adjacent machines of each machine according to the following procedure based on the adjacent machine information of each machine and the information that the machines A, D, and G are the first machine of each group. The connection relationship by the line 400 is determined.

(1) A pair of the temporary logical identifier of the own machine and the temporary logical identifier of the adjacent machine indicating the adjacent relationship is extracted from the adjacent machine information of each machine.
1. Adjacent pair of machine A: (4, 2), (4, 1)
2. Adjacent pair of machine B: (2, 4), (2, 7)
3. Adjacent pair of machine C: (7, 2)
4). Adjacent pair of machine D: (1, 4), (1, 9), (1, 5)
5). Adjacent pair of machine E: (9, 1), (9, 3)
6). Adjacent pair of machine F: (3, 9)
7). Adjacent pair of machine G: (5, 1), (5, 6)
8). Adjacent pair of machine H: (6, 5), (6, 8)
9. Adjacent pair of machine I: (8, 6)

(2) The adjacency relationship for each temporary logical identifier is restored.
1. The combinations including the temporary logical identifier 4 are (4, 2), (4, 1), (2, 4), (1, 4). From this information, it can be seen that 1, 2, and 4 are adjacent to each other across 4, such as (1-4-2).
2. The combinations including the temporary logical identifier 2 are (4, 2), (2, 4), (2, 7), (7, 2). From this information, it can be seen that 2, 4 and 7, and (4-2-7) are adjacent to each other with 2 between them.
3. The combinations including the temporary logical identifier 7 are (2, 7) and (7, 2). From this information, it can be seen that 2 and 7 are adjacent to each other, such as (2-7).
4). The combinations including the temporary logical identifier 1 are (4, 1), (1, 4), (1, 9), (1, 5), (9, 1), (5, 1). From this information, it can be seen that 1, 4 and 9 are adjacent to each other as (4-1-9). It can also be seen that 1 and 5 and 9 (5-1-9), 4 and 1 and 5 are adjacent to each other as (4-1-5).
5). The combinations including the temporary logical identifier 9 are (1, 9), (9, 1), (9, 3), (3, 9). From this information, it can be seen that 1, 3, and 9 are adjacent to each other across 9, such as (1-9-3).
6). The combinations including the temporary logical identifier 3 are (9, 3) and (3, 9). From this information, it can be seen that 3 and 9 are adjacent to each other as (3-9).
7). The combinations including the temporary logical identifier 5 are (1, 5), (5, 1), (5, 6), and (6, 5). From this information, it can be seen that 1, 5, and 6 are adjacent to each other across 5 as (1-5-6).
8). The combinations including the temporary logical identifier 6 are (5, 6), (6, 5), (6, 8), and (8, 6). From this information, it can be seen that 5 and 6 and 8 are adjacent to each other with 5 sandwiched as (5-6-8).
9. Combinations including the temporary logical identifier 8 are (6, 8) and (8, 6). From this information, it can be seen that 6 and 8 are adjacent to each other as (6-8).

(3) The adjacent relationships [1] to [11] created in (2) above are merged.
1. (1-4-2) ... [1]
2. (4-2-7) ... [2]
3. (2-7) ……… [3]
4). (4-1-9) ... [4]
5). (5-1-9) ... [5]
6). (4-1-5) ... [6]
7). (1-9-3) ... [7]
8). (3-9) ……… [8]
9. (1-5-6) ... [9]
Ten. (5-6-8) ... [10]
11． (6-8) ……… [11]

  First, merge all combinations [1] through [11]. However, for example, [2] + [3] is ignored if there is no new adjacency to be restored.

1. [1] + [2] → (1-4-2-7) ... [12]
2. [1] + [4] → (9-1-4-2) ... [13]
3. [1] + [6] → (5-1-4-2) ... [14]
4). [4] + [7] → (4-1-9-3) ... [15]
5). [5] + [7] → (5-1-9-3) ... [16]
6). [5] + [9] → (6-5-1-9) ... [17]
7). [6] + [9] → (4-1-5-6) ... [18]
8). [9] + [10] → (1-5-6-8) ... [19]

(4) Merge the adjacency created in (3) above. The merger is performed for all combinations [12] to [19].
1. [12] + [13] → (9-1-4-2-7) ... [20]
2. [12] + [14] → (5-1-4-2-7) ... [21]
3. [13] + [15] → (2-4-1-9-3) ... [22]
4). [14] + [18] → (2-4-1-5-6) ... [23]
5). [16] + [17] → (6-5-1-9-3) ... [24]
6). [17] + [19] → (9-1-5-6-8) ... [25]
7). [18] + [19] → (4-1-5-6-8) ... [26]

(5) The adjacent relationship created in (4) is merged. The merger is performed for all combinations [20] to [26].
1. [20] + [22] → (7-2-4-1-9-3) ... [27]
2. [21] + [23] → (7-2-4-1-5-6) ... [28]
3. [23] + [26] → (2-4-1-5-6-8) ... [29]
4). [24] + [25] → (3-9-1-5-6-8) ... [30]

(6) Merge the adjacency created in (5) above. The merger is performed for all combinations [27] to [30]. However, those that cannot be merged are left as they are.
1. [27] → (7-2-4-1-9-3)
2. [28] + [29] → (7-2-4-1-5-6-6)
3. [30] → (3-9-1-5-6-8)

As for the first machine in the group, group a is machine A (temporary logical identifier 4), group b is machine D (temporary logical identifier 1), and group c is machine G (temporary logical identifier 5). Extracting the sequence from the first machine in each group is as follows.
Group a: 4 → 2 → 7, 4 → 1 → 9 → 3, 4 → 1 → 5 → 6 → 8
Group b: 1 → 9 → 3, 1 → 5 → 6 → 8, 1 → 4 → 2 → 7
Group c: 5 → 6 → 8, 5 → 1 → 4 → 2 → 7, 5 → 1 → 9 → 3

Since the sequence including two or more temporary logical identifiers of the first machine in the group can be ignored, the connection relationship of the machines in each group is as follows.
Group a: 4 → 2 → 7
Group b: 1 → 9 → 3
Group c: 5 → 6 → 8

  Next, the real logical identifier distributing unit 204 distributes logical identifiers to the machines A to D based on the machine connection relationship for each group determined by the machine connection relationship determining unit 213. In this example, the upper part represents the group and the lower part represents the order within the group so that the group to which the group belongs can be found from the value of the logical identifier and the connection relation of the machine for each group can be seen from the arrangement. Use logical identifiers. As a result, for example, the machine A with the temporary logical identifier 4 is a1, the machine B with the temporary logical identifier 2 is a2, the machine C with the temporary logical identifier 7 is a3, and the machine D with the temporary logical identifier 1 is Is b2 for machine E with a temporary logical identifier of 9, b2 for machine F with a temporary logical identifier of 3, c1 for machine G with a temporary logical identifier of 5, c2 for machine H with a temporary logical identifier of 6 C3 is distributed to the machine I whose temporary logical identifier is 8, and is stored in the real logical identifier holding means 105 of each machine.

  In this example, the number of machines to which logical identifiers are set is nine, but it can be applied to the case of two or more machines (the minimum configuration is two groups and the number of machines belonging to each group). 1).

  Next, the effect of this embodiment will be described.

  According to the present embodiment, logical identifiers can be set as intended by the system administrator for a plurality of machines 100 connected to be communicable with each other via the network 300. The reason is that if the system administrator defines the connection relationship of the machines 100 by the adjacent machine connection line 400, the real logical identifier of each machine 100 is determined according to the connection relationship.

  Further, according to the present embodiment, since the connection direction by the adjacent machine connection line is not fixed, the system administrator does not need to care about the connection direction when connecting the machines 100 by the adjacent machine connection line. .

  By giving information on the head machine for each group, a plurality of machines can be grouped, and real logic identifiers can be set for each group in the order of machines.

“Third embodiment”
Referring to FIG. 13, in the third embodiment of the present invention, as compared with the first embodiment shown in FIG. 1, the machine 100 has provisional logical identifier holding means 102, adjacent machine temporary logical identifier holding. Instead of the means 103, the temporary logical identifier integration means 104, and the real logical identifier holding means 105, a logical identifier holding means 122 and a logical identifier propagation means 123 are provided, and a control machine 500 is provided instead of the control machine 200. Is different.

  The logical identifier holding unit 122 of each machine 100 has a function of holding the logical identifier received from the input side adjacent machine connection unit 106 as the logical identifier of the own machine.

  The logical identifier propagation unit 123 of each machine 100 outputs the logical identifier obtained by incrementing or decrementing the logical identifier of the own machine held in the logical identifier holding unit 122 by a predetermined value to the output side adjacent machine to which the adjacent machine connection line 400 is connected. It has a function of transmitting from the connection unit 107 to the input side adjacent machine connection unit 106 of the adjacent machine 100.

  The control machine 500 is temporarily connected by the adjacent machine connection line 400 to the input side adjacent machine connection unit 106 of the head machine of the plurality of machines 100 connected in a daisy chain by the adjacent machine connection line 400, and the initial logical identifier is set. It has a function to output a value to the first machine.

  Next, the operation of the present embodiment will be described with a specific example.

  As a specific example, as shown in FIG. 14, in a communication system in which four machines A, B, C, and D are connected to the network 300, the order starts from 1 in the order of machine A → machine B → machine C → machine D. Take the case of setting a logical identifier.

  First, the system administrator uses the adjacent machine connection line 400 to input the output side adjacent machine connection unit 107 of the machine A and the input side adjacent machine connection unit 106 of the machine B, the output side adjacent machine connection unit 107 of the machine B, and the input of the machine C. The side adjacent machine connection unit 106, the output side adjacent machine connection unit 107 of the machine C, and the input side adjacent machine connection unit 106 of the machine D are connected. Further, the control machine 500 and the input side adjacent machine connection unit 106 of the machine A are connected.

  Next, the control machine 500 gives the value 1 as a logical identifier to the input side adjacent machine connection unit 106 of the first machine A through the adjacent machine connection line 400.

  In the machine A, the logical identifier holding unit 122 holds the logical identifier of value 1 received from the input side adjacent machine connection unit 106. Next, the logical identifier propagation unit 123 transmits the logical identifier of the value 2 obtained by incrementing the logical identifier of the value 1 of the own machine by 1 from the output side adjacent machine connection unit 107 to the adjacent machine B.

  In the machine B, the logical identifier holding unit 122 holds the logical identifier of value 2 received from the input side adjacent machine connection unit 106. Next, the logical identifier propagation unit 123 transmits the logical identifier of value 3 obtained by incrementing the logical identifier of value 2 of the own machine by 1 from the output side adjacent machine connection unit 107 to the adjacent machine C.

  In the machine C, the logical identifier holding unit 122 holds the logical identifier of value 3 received from the input side adjacent machine connection unit 106. Next, the logical identifier propagation unit 123 transmits the logical identifier of value 4 obtained by incrementing the logical identifier of value 3 of the own machine by 1 from the output side adjacent machine connection unit 107 to the adjacent machine D.

  In the machine D, the logical identifier holding unit 122 holds the logical identifier of the value 4 received from the input side adjacent machine connection unit 106. The logical identifier propagation unit 123 does nothing because the adjacent machine connection line 400 is not connected to the output side adjacent machine connection unit 107.

  Such a procedure makes it possible to set a logical identifier that can uniquely identify the connection position of the machine. For example, it can be immediately recognized that the machine C having the logical identifier 3 is the third machine counted from the top.

  In this example, the number of machines to which logical identifiers are set is four. However, the present invention is applicable to two or more machines.

  Next, the effect of this embodiment will be described.

  According to the present embodiment, logical identifiers can be set as intended by the system administrator for a plurality of machines 100 connected to be communicable with each other via the network 300. The reason is that if the system administrator defines the connection relationship of the machines 100 by the adjacent machine connection line 400, the real logical identifier of each machine 100 is determined according to the connection relationship.

  Further, according to the present embodiment, even in an environment where there is no server that automatically distributes a logical identifier such as a DHCP server, it is possible to set a logical identifier according to the connection relationship of a plurality of machines.

  In the third embodiment, each machine 100 stores the received logical identifier as a logical identifier of its own machine, and increments or decrements it and transmits it to the adjacent machine. However, the received logical identifier is incremented or decremented. The decremented logical identifier may be stored as the logical identifier of the own machine, and the logical identifier itself may be transmitted to the adjacent machine.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above examples, and various other additions and modifications can be made. For example, as shown in FIG. 15, when a plurality of machines 100 are connected by the adjacent machine connection line 400, the physically close machines 100 are connected by a wire, and the relatively distant machines 100 are connected by radio. Thus, the wiring cost can be reduced. In addition, the machine 100 and the control machine 200 of the present invention can be realized by a computer and a program, as well as by hardware. The program for the machine 100 is provided by being recorded on a computer-readable recording medium such as a magnetic disk or a semiconductor memory, read by the computer at the time of starting up the computer, and controlling the operation of the computer. It functions as the machine 100 in each embodiment described above. In addition, the program for the control machine 200 is provided by being recorded on a computer-readable recording medium such as a magnetic disk or a semiconductor memory, and is read by the computer when the computer is started up, thereby controlling the operation of the computer. The computer is caused to function as the control machine 200 in each of the embodiments described above.

It is a block diagram of a 1st embodiment of the present invention. It is a flowchart which shows the example of a whole process of the 1st Embodiment of this invention. It is a flowchart which shows the process example of the control machine at the time of the real logic identifier setting in the 1st Embodiment of this invention. It is a flowchart which shows the process example of each machine at the time of the real logic identifier setting in the 1st Embodiment of this invention. It is explanatory drawing of the specific example of the 1st Embodiment of this invention. It is a figure which shows the example of the content of the adjacent machine information in the specific example of the 1st Embodiment of this invention. It is a block diagram of the 2nd Embodiment of this invention. It is a flowchart which shows the process example of each machine at the time of the real logic identifier setting in the 2nd Embodiment of this invention. It is explanatory drawing of the specific example 1 of the 2nd Embodiment of this invention. It is a figure which shows the example of the content of the adjacent machine information in the specific example 1 of the 2nd Embodiment of this invention. It is explanatory drawing of the specific example 2 of the 2nd Embodiment of this invention. It is a figure which shows the example of the content of the adjacent machine information in the specific example 2 of the 2nd Embodiment of this invention. It is a block diagram of the 3rd Embodiment of this invention. It is explanatory drawing of the specific example of the 3rd Embodiment of this invention. It is explanatory drawing of other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Machine 101 ... Network interface 102, 112 ... Temporary logic identifier holding means 103, 113 ... Neighboring machine temporary logic identifier holding means 104 ... Temporary logic identifier integration means 105 ... Real logic identifier holding means 106 ... Input side adjacent machine connection part 107 ... Output side adjacent machine connection unit 108 ... Processing units 116, 117 ... Adjacent machine connection unit 122 ... Logical identifier holding means 123 ... Logical identifier propagation means 200 ... Control machine 201 ... Network interface 202 ... Temporary logical identifier distribution means 203,213 ... Machine connection relation determining means 204 ... Real logic identifier distributing means 205 ... Storage means 300 ... Network 400 ... Adjacent machine connection line 500 ... Control machine 600 ... Input device

Claims (4)

A logical identifier automatic setting device in a communication system in which a plurality of machines are connected to a network by a network interface,
A control device capable of communicating with the plurality of machines through the network;
Wherein each machine, and at least two adjacent machine connection part for connecting with other machines in each group by the adjacent machine connection line is another communication medium and the network holds the temporary logical identifier of the machine Temporary logical identifier holding means for transmitting the held temporary logical identifier of the own machine from all the adjacent machine connection portions connected to the adjacent machine connection line to the adjacent machine, and received from the adjacent machine connected by the adjacent machine connection line Neighboring machine temporary logical identifier holding unit holding the temporary logical identifier of the neighboring machine, the temporary logical identifier of the own machine held in the temporary logical identifier holding unit, and held in the neighboring machine temporary logical identifier holding unit Temporary machine information including a pair with a temporary logical identifier of an adjacent machine is transmitted to the control device through the network. Includes a physical identifier integrating means, and a real logical identifier holding means for holding the real logical identifier of the machine received from the control device via the network,
Based on the neighboring machine information transmitted from each machine to the control device and the information on the head machine for each group separately given , the connection order of each of the plurality of machines by the neighboring machine connection line is determined. Machine connection relationship determining means for determining, and real logic identifier distributing means for determining and distributing real logic identifiers to be given to the plurality of machines according to the connection order of the plurality of machines determined by the machine connection relationship determining means. A logical identifier automatic setting device characterized by the above. The real logical identifier distributing means distributes real logical identifiers such that the group to which the real logical identifier belongs can be identified from the value of the real logical identifier and the connection relation of the machine can be determined for each group from the value of the real logical identifier. Item 2. The logical identifier automatic setting device according to Item 1. A logical identifier automatic setting method in a communication system in which a plurality of machines are connected to a network by a network interface,
A first step of connecting a plurality of machines for each group using an adjacent machine connection line which is a communication medium different from the network;
A second step in which a control machine connected to the network distributes a unique temporary logical identifier to each of the machines;
A third step in which each machine sends its temporary logical identifier to an adjacent machine;
A fourth step in which each machine transmits neighboring machine information including a set of the temporary logical identifier of the own machine and the temporary logical identifier received from the neighboring machine to the control machine;
The control machine determines the connection order of each group of the plurality of machines by the adjacent machine connection line based on the adjacent machine information received from each machine and the information of the head machine for each group separately provided . And the process of
A logical identifier automatic setting method comprising: a sixth step in which the control machine determines and distributes real logical identifiers to be given to the plurality of machines according to the determined connection order of the plurality of machines. In the fifth step, the control machine determines and distributes real logic identifiers so that the group to which the group belongs can be determined from the value of the real logic identifier and the connection relation of the machine can be determined for each group from the value of the real logic identifier. The logical identifier automatic setting method according to claim 3.

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