JP4390794B2 - Communication medium selecting device, communication medium selecting method, and recording medium recording communication medium selecting program - Google Patents

Description

  The present invention selects a communication medium from a cable in response to the demand for the communication medium in a communication line configured by laying a cable formed by collectively combining a plurality of communication medium aggregates composed of a plurality of communication media. The present invention relates to a communication medium selection device, a communication medium selection method, and a recording medium on which a communication medium selection program is recorded.

  Before describing the prior art, terms used in this specification will be described.

  First, a communication medium forming a collective structure and its disconnection will be described. For example, a communication medium such as an optical fiber cable is a communication medium aggregate that is a single aggregate structure configured by combining a plurality of communication media for reasons such as higher cable density and improved connection work. It is made. Therefore, it is impossible to cut and use only one communication medium, and cutting and use are performed in units of aggregate structures.

  With reference to FIG. 9, the communication medium forming the aggregate structure and its disconnection will be specifically described. FIG. 9A is a diagram for explaining an example of a hierarchically structured aggregate structure. FIG. 9A shows a tape-shaped aggregate structure composed of 4-core aggregates. ) Shows an aggregate structure formed by joining five tape-like aggregate structures, and (c) shows an aggregate structure in which this aggregate structure is incorporated into a cable. In the aggregate structure shown in FIG. 9A, (c), a tape assembly accommodating portion is provided around a steel wire provided in the center, and five tape assemblies are provided in the recesses of the tape assembly accommodating portion. A body is accommodated, and a working communication medium is accommodated in one of the recesses. And these circumference | surroundings are protected by the protective coating part, and the outer skin is provided in the outermost side.

  In FIG. 9B, an aggregate structure composed of four optical fibers is cut and separated into discrete single cores, two of which are used, and the remaining two cores are empty (inventory). Is shown). Further, FIG. 9C shows another example of the aggregate structure. In this aggregate structure, a plurality of single-core communication media are gathered and housed in one tube, and a plurality of these tubes gather to form a cable. That is, in this aggregate structure, six tubes are provided around a steel wire provided at the center, each tube has a copper wire at the center, and four single-core communication media around the steel wire. A balancer for fixing these communication media is provided, and the periphery of the six tubes is protected by being enveloped.

  Next, the young number and old number used when selecting the communication medium accommodated in the cable configured as shown in FIG. 9 will be described. A young number and an old number are concepts representing the size of a number. A relatively smaller number than a certain number is called a young number, and a larger number is called an old number.

  The point facility is a facility arranged along the cable so as to connect and branch the communication medium, and is a facility through which the cable passes, such as a utility pole, a manhole, and a hand hole. At this point, the communication medium is connected and branched. This point facility is provided along a cable extending from the communication device accommodating station, as shown in FIG.

  In order to route the cable to the user's house or building, it is necessary to take out the communication medium from the cable at a certain point. The point at which this communication medium is taken out is called a wiring point. This wiring point exists on the normal point facility as indicated by (B) in FIG.

  The terms “upper” and “lower” are terms indicating the concept of direction. For example, as shown by (c) in FIG. 10, a communication device accommodating station accommodating a communication device at a certain point on the communication line. The direction is referred to as the upper part, and the subscriber side to which the terminal is connected is referred to as the lower part.

  The leaf cable is a cable located at the end not connected to another cable on its lower side, as indicated by (d) in FIG.

  Further, the wiring of the communication medium is branched at several places as shown by (e) in FIG. 10 in order to provide a communication service to the user spreading in a plane.

  The optical branching module will be described with reference to FIG. The optical branching module 111 shown in the figure inputs or outputs test light to or from a communication medium in order to test the optical communication medium, and is connected to the communication device 112 or the communication terminal 113. Connectors 111a and 111b for connecting to a medium, an optical coupler 111c for coupling test light, a filter 111d for blocking service providing wavelengths, and the like are included. There are several types of optical branching modules depending on the wavelength used for communication and testing, the presence or absence of a filter that blocks the test light, the reflection characteristics of the connector, and the like.

  The term “use category of communication medium” indicates a classification indicating the use state of the communication medium. For example, “free”, “in use”, “reservation”, “failure”, “terminal free”, “single-core free”, etc. is there. Terminal free means a communication medium that is not connected to another communication medium on the lower side and is in an “empty” state. Single-core free means that the aggregate structure is single-core and “free” It is a communication medium in the state. FIG. 12 shows the above-described use classification of the communication medium at the wiring points.

  Next, a conventional communication medium selection device will be described with reference to FIG. 13 includes a control unit 110, a selection unit 122, a communication medium use category storage unit 124, a command processing unit 126, a wiring point storage unit 128, an output unit 132, an input unit 134, and an input / output interface. Unit 140, network 150, and input / output device 152.

  In order to select a communication medium using a conventional communication medium selection device, a communication medium selection person is close to a point where there is a new demand for the selection command and the communication medium via the network 150 or using the input / output device 152. Point facility specifying information for specifying the point facility is input to the input / output interface unit 140. The selection command and the point facility specifying information input to the input / output interface unit 140 are read into the input unit 134 by an instruction from the control unit 110 and further sent from the input unit 134 to the command processing unit 126 by an instruction from the control unit 110. .

  The command processing unit 126 analyzes the selection command according to an instruction from the control unit 110, supplies point facility specifying information to the selection unit 122, and instructs the selection unit 122 to execute the selection process. In response to an instruction from the control unit 110, the selection unit 122 confirms whether or not there is a wiring point in the point facility from the wiring point storage unit 128. If there is a wiring point, the selection unit 122 selects the communication medium. The usage category of the communication medium passing through the wiring point is read from the usage category storage unit 124, and it is determined from the read communication medium usage category whether there is a terminal empty or single-core empty communication medium at the wiring point. If it exists, the communication medium is selected, and if it does not exist, the communication medium is selected from the lowest number in order to cut a new empty aggregate structure passing through the wiring point. The processing result is supplied to the communication medium use category storage unit 124 and the output unit 132.

Further, in the confirmation of the existence of the wiring point, if the wiring point does not exist, the medium selection process cannot be continued, and thus the process ends as an error.

  Note that the data sent to the communication medium use category storage unit 124 is stored by changing the data at a predetermined position during use according to an instruction from the control unit 110. Also, the processing result sent to the output unit 132 is transmitted to the network 150 or the input / output device 152 via the input / output interface unit 140 according to an instruction from the control unit 110.

  As described above, the wiring point information is necessary for selecting the communication medium. However, in order to select from the input point facility information, the data of the wiring point Y corresponding to the point facility X is created in advance. In this case, for example, as shown in FIG. 14, there is a problem that a plurality of correspondence data in which a plurality of point facilities correspond to one wiring point must be created. In addition, when there is no correspondence data of the point facility X to the wiring point Y, there is a problem that the communication medium selection process cannot be continued.

  Further, if there is only a different type of communication medium cable such as a transmission method different from the target communication medium cable in the point facility designated by the communication medium selector, the communication medium selection process is continued. There is a problem that can not be.

  Further, in selecting a communication medium, it is important to improve the usage rate of the communication medium, that is, it is required to respond to as much demand as possible. However, in the conventional communication medium selection apparatus, communication at the lower side of the demand generation point is required. There is no medium usage rate storage function or judgment function, and communication media must be selected in order from the lowest number of communication media at the designated wiring point. Therefore, if demand concentrates on a certain wiring point, There is a problem in that there is no communication medium corresponding to the demand generated on the lower side, and the entire cable cannot meet the demand even though the communication medium usage rate is low.

  The present invention has been made in view of the above, and an object of the present invention is to search for a wiring point along a cable from a nearby point facility, and to improve the usage rate by comparing the communication medium usage rate of the cable. Thus, a communication medium selection apparatus, a communication medium selection method, and a recording medium in which a communication medium selection program is recorded can be provided.

  In order to achieve the above object, the present invention as claimed in claim 1 is a communication medium selection device for selecting a communication medium for a demand point from a cable configured by collecting a plurality of communication media, each time a communication medium is selected. Branch area inventory medium number calculating means for calculating the number of branch area inventory media for each branch area obtained by adding the number of individual cable inventory cores belonging to the branch area below the demand point to the calculated branch area Branch area inventory medium number storage means for storing the number of branch area inventory media for each branch, and in selecting a communication medium, the branch area inventory medium number in each branch area below the demand generation point is read from the branch area inventory medium number storage means. The gist of the present invention is to have a communication medium selecting means for comparing each branch area and selecting a communication medium based on the comparison result.

  In the present invention according to claim 1, every time a communication medium is selected, the number of branch area inventory media for each branch area under the demand point is calculated, and the calculated number of branch area inventory media is stored. In selecting an area, the number of branch area inventory media in each branch area is read and compared for each branch area, and the communication medium is selected based on the comparison result. However, the media usage rate can be improved, and the media usage rate can be improved because the media selection results at each demand generation point up to the time of media selection are reflected in the number of branch area inventory media. it can.

  Further, the present invention described in claim 2 is the calculation rule setting in which, in the present invention described in claim 1, the branch area stock medium number calculating means sets in advance a rule for calculating the branch area stock medium number in each branch area. Wiring block attribute storage that stores means and attributes including the number of users of the wiring block and the average demand rate that the individual cables required to calculate the number of branch area inventory media can provide communication media Means, an attribute reading means for reading an attribute including a use state of a communication medium necessary for calculating the number of cable stock media of the designated cable in the branch area, an attribute in the wiring block, and an attribute of the communication medium of the designated cable And a calculation means for calculating the number of branch area stock media from the branch area stock medium count calculation rule.

  In the present invention according to claim 2, a rule for calculating the number of branch area stock media in each branch area is set in advance, and each cable necessary for calculating the number of branch area stock media provides the media. Stores attributes including the number of wiring block users and the average demand rate that are possible, and includes attributes that include the usage status of the communication media required to calculate the number of cable inventory media for the specified cable in the branch area. Since the number of branch medium stock media is calculated from the read, wiring block attributes, specified cable communication media attributes, and branch area stock media count calculation rules, the number of stock media in the entire branch area is calculated. It is not necessary to individually specify the number of medium allocations in the system, and the medium usage rate can be improved even when the demand forecast is not accurate.

  Furthermore, in the present invention described in claim 3, in the present invention described in claim 1, the communication medium selecting means generates cable tree information on the lower side of the designated wiring point from the cable connection information, and the generated cable tree Branch area range setting means for determining the range of the branch area, branch area inventory medium number comparison means for comparing the number of branch area inventory media in each branch area, and priority medium extraction means for extracting communication media according to a preset priority order It is summarized as having.

  According to the third aspect of the present invention, the cable tree information on the lower side of the designated wiring point is generated from the cable connection information, the range of the branch area is determined by the generated cable tree, and the branch area inventory medium in each branch area Since the numbers are compared and the communication media are extracted in accordance with a preset priority order, the information can be automatically generated without storing the branch area information in advance.

  The present invention as set forth in claim 4 is a communication medium selection method for selecting a communication medium for a demand point from a cable formed by collectively combining a plurality of communication media, each time a communication medium is selected, a branch area below the demand point Calculate the number of branch area inventory media for each branch area obtained by adding the number of individual cable inventory cores belonging to the inside, store the calculated number of branch area inventory media for each branch area, and select communication media Therefore, the gist is to read the branch area inventory medium number in each branch area below the demand generation point from the branch area inventory medium number storage means, compare each branch area, and select a communication medium based on the comparison result. .

  In the present invention according to claim 4, every time a communication medium is selected, the number of branch area inventory media for each branch area under the demand point is calculated, and the calculated number of branch area inventory media is stored. In selecting an area, the number of branch area inventory media in each branch area is read and compared for each branch area, and the communication medium is selected based on the comparison result. However, the media usage rate can be improved, and the media usage rate can be improved because the media selection results at each demand generation point up to the time of media selection are reflected in the number of branch area inventory media. it can.

  Further, in the present invention described in claim 5, in the present invention described in claim 4, the processing for calculating the number of branch area inventory media sets in advance a rule for calculating the number of branch area inventory media in each branch area, Stores attributes including the number of users of the wiring block and the average demand rate that the individual cables required to calculate the number of branch area inventory media can provide communication media, and the designated cable in the branch area Reads the attribute including the communication medium usage necessary to calculate the cable inventory medium number of the cable, branches from the attribute in the wiring block, the attribute of the communication medium of the specified cable, and the calculation rule of the branch area inventory medium number The gist is to calculate the number of area inventory media.

  In the present invention according to claim 5, a rule for calculating the number of branch area stock media in each branch area is set in advance, and each cable necessary for calculating the number of branch area stock media provides the media. Stores attributes including the number of wiring block users and the average demand rate that are possible, and includes attributes that include the usage status of the communication media required to calculate the number of cable inventory media for the specified cable in the branch area. Since the number of branch medium stock media is calculated from the read, wiring block attributes, specified cable communication media attributes, and branch area stock media count calculation rules, the number of stock media in the entire branch area is calculated. It is not necessary to individually specify the number of medium allocations in the system, and the medium usage rate can be improved even when the demand forecast is not accurate.

  Further, in the present invention described in claim 6, in the present invention described in claim 4, the process of selecting the communication medium generates cable tree information on the lower side of the designated wiring point from the cable connection information, and the generated cable The gist is to determine the range of the branch area by a tree, compare the number of branch area stock media in each branch area, and extract communication media according to a preset priority order.

  In this invention of Claim 6, the cable tree information below the designated wiring point is generated from the cable connection information, the range of the branch area is determined by the generated cable tree, and the branch area inventory medium in each branch area Since the numbers are compared and the communication media are extracted in accordance with a preset priority order, the information can be automatically generated without storing the branch area information in advance.

  The present invention according to claim 7 is a recording medium in which a communication medium selection program for selecting a communication medium for a demand point from a cable configured by a plurality of communication media is recorded, each time a communication medium is selected. Calculate the number of branch area inventory media for each branch area obtained by adding the number of individual cable inventory cores belonging to the branch area below the point, and store the calculated number of branch area inventory media for each branch area. In selecting a communication medium, the number of branch area stock media in each branch area below the demand generation point is read from the branch area stock medium number storage means and compared for each branch area, and a communication medium is selected based on the comparison result. The gist is to record a communication medium selection program on a recording medium.

  In the present invention described in claim 7, every time a communication medium is selected, the number of branch area inventory media for each branch area under the demand point is calculated, and the calculated number of branch area inventory media is stored. In the selection, the number of branch area stock media in each branch area is read out, compared for each branch area, and a communication medium selection program for selecting a communication medium based on the comparison result is recorded in the recording medium. Can be used to improve the distribution.

  Further, in the present invention described in claim 8, in the present invention described in claim 7, the process for calculating the number of branch area inventory media sets in advance a rule for calculating the number of branch area inventory media in each branch area, Stores attributes including the number of users of the wiring block and the average demand rate that the individual cables required to calculate the number of branch area inventory media can provide communication media, and the designated cable in the branch area Reads the attribute including the communication medium usage necessary to calculate the cable inventory medium number of the cable, branches from the attribute in the wiring block, the attribute of the communication medium of the specified cable, and the calculation rule of the branch area inventory medium number The gist is to record a communication medium selection program for calculating the number of area stock media on a recording medium.

  In the present invention according to claim 8, a rule for calculating the number of branch area stock media in each branch area is preset, and each cable necessary to calculate the number of branch area stock media provides the media. Stores attributes including the number of wiring block users and the average demand rate that are possible, and includes attributes that include the usage status of the communication media required to calculate the number of cable inventory media for the specified cable in the branch area. Since the communication medium selection program for calculating the branch area stock medium number from the read, the attribute in the wiring block, the attribute of the communication medium of the designated cable, and the calculation rule of the branch area stock medium number is recorded on the recording medium, It can be used to increase the flowability.

  Furthermore, in the present invention described in claim 9, in the present invention described in claim 7, the process of selecting the communication medium generates cable tree information on the lower side of the designated wiring point from the cable connection information, and the generated cable The gist is that a branch area is defined by a tree, the number of branch area stock media in each branch area is compared, and a communication medium selection program for extracting a communication medium according to a preset priority order is recorded on a recording medium.

  In this invention of Claim 9, the cable tree information of the designated wiring point lower part side is produced | generated from cable connection information, the range of a branch area is defined by this produced | generated cable tree, and the branch area stock medium in each branch area Since the communication medium selection program for comparing the numbers and extracting the communication medium in accordance with the preset priority order is recorded on the recording medium, it is possible to improve the circulation by using the recording medium.

  As described above, according to the present invention, every time a communication medium is selected, the number of branch area inventory media for each branch area under the demand point is calculated, and the calculated number of branch area inventory media is stored. When selecting the network, the number of branch area inventory media in each branch area is read and compared for each branch area, and the communication media is selected based on the comparison result.Therefore, there are areas where cables with many connections and cables with few connections are mixed. However, the media usage rate can be improved, and the media usage rate can be improved because the media selection results at each demand generation point up to the time of media selection are reflected in the number of branch area inventory media. it can.

  Further, according to the present invention, a rule for calculating the number of branch area inventory media in each branch area can be set in advance, and individual cables necessary for calculating the number of branch area inventory media can provide media. Stores attributes including the number of wiring block users and average demand ratio that are ranges, reads the attributes including the usage status of communication media required to calculate the number of cable stock media for the specified cable in the branch area, and reads the wiring block Since the branch area inventory medium number is calculated from the attributes in the specified cable, the communication cable attribute of the specified cable, and the branch area inventory medium number calculation rule, the media allocation in units of wiring blocks is obtained by obtaining the inventory medium number in the entire branch area. It is not necessary to specify the number individually, and the medium usage rate can be improved even when the demand forecast is not accurate.

  Furthermore, according to the present invention, the cable tree information on the lower side of the designated wiring point is generated from the cable connection information, the range of the branch area is determined by the generated cable tree, and the number of branch area inventory media in each branch area is compared. Since the communication medium is extracted according to the preset priority order, it can be automatically generated without storing the branch area information in advance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a communication medium selection device according to an embodiment of the present invention. 1 includes a control unit 210, a selection unit 222 constituting a communication medium selection unit, a communication medium use category storage unit 224 constituting a communication medium use state storage unit, a command processing unit 226, and an output unit. 232, an input unit 234, an input / output interface unit 240, a network 250, an input / output device 252, a communication medium usage rate information storage unit 262 constituting a usage rate storage unit, and a communication medium usage rate calculation unit 264 constituting a usage rate calculation unit. The optical branch module determining unit 266 that constitutes the optical branch module determining unit, and the wiring point specifying unit 268 that constitutes the wiring point specifying unit.

  As shown in FIG. 2, the wiring point specifying unit 268 includes a cable connection storage unit 310 that forms a cable connection information storage unit, a cable attribute storage unit 312 that forms a cable attribute storage unit, a cable attribute determination unit, and a cable search unit. , A cable attribute determination unit, a wiring point selection unit 314 that constitutes a specific wiring point output unit, and a wiring point storage unit 316 that constitutes a wiring point storage unit. As shown in FIG. 3, the selection unit 222 includes a selection priority setting unit 1010 that constitutes a priority setting unit, a priority comparison unit, a priority comparison unit 1012 that constitutes a comparison / sorting unit, a priority medium extraction unit, Disconnection determination unit, priority medium extraction unit 1014 constituting communication medium extraction unit, communication medium disconnection condition setting unit 1020 constituting communication condition setting unit, communication medium usage rate comparison unit 1022, cut medium extraction unit 1024, and leaf cable identification It is composed of a leaf cable specifying unit 1026 constituting the means. As shown in FIG. 4, the optical branch module determination unit 266 includes an optical branch module connection storage unit 410 constituting an optical branch module connection storage unit, an optical branch module attribute storage unit 412 constituting an optical branch module attribute storage unit, And a determination unit 414 constituting an optical branch module use condition satisfaction determination means.

  Next, the operation of the communication medium selection device shown in FIG. 1 will be described with reference to the flowchart shown in FIG.

  For example, assuming that a new demand for a communication medium for newly laying an optical cable or a metal cable is generated up to a user's house or building as shown in FIG. 6A, communication for laying out the new demand is performed. The communication medium selector who selects the medium performs point equipment specifying information for specifying the point equipment close to the point where the new demand was made, and tests the communication medium after laying the communication medium in response to the new demand. For this purpose, the use conditions of the optical branching module used for this purpose are input to the input / output interface unit 240 together with the selection command via the network 250 or from the input / output device 252. The point facility specifying information, the optical branching module usage conditions, and the selection command input to the input / output interface unit 240 are read into the input unit 234 according to instructions from the control unit 210 and further sent from the input unit 234 to the command processing unit 226. It is done.

  The command processing unit 226 analyzes the selection command according to an instruction from the control unit 210, sends the point facility specifying information to the wiring point specifying unit 268, and instructs the wiring point specifying unit 268 to execute the wiring point specifying process.

  In the wiring point identification unit 268, first, the wiring point selection unit 314 reads the attribute of the cable installed in the identified point facility from the cable attribute storage unit 312 according to an instruction from the control unit 210 (step S101). Then, it is determined whether or not the type of the read cable matches the intended one (step S102). That is, whether or not the type of cable provided in the point facility specified by the communication medium selector matches the type of cable requested by the new demand generated in FIG. Determine. If the type of the read cable matches the target, the wiring point selection unit 314 reads the wiring point information of the cable from the wiring point storage unit 316 along the cable in the point facility (step S103). Then, it is determined from the read wiring point information whether or not there is a wiring point in the point facility (step S104). If the result of this determination is that there is a wiring point, the wiring point is the target, and the wiring point selection unit 314 sends the wiring point information, which is the selection result, to the command processing unit as instructed by the control unit 210. 226.

  In the determination in step S104, if there is no wiring point, the wiring point selection unit 314 performs control to detect the wiring point by tracing the cable installed in the point facility specified by the communication medium selector. In accordance with an instruction from the unit 210, the cable connection information in the point facility is read from the cable connection storage unit 310 (step S120), and it is determined from the read cable connection information whether a cable connection destination exists (step S121). If there is no cable connection destination, it means that the end point of the cable has been searched, and the wiring point cannot be detected. Therefore, error processing is performed (step S150), and this processing ends.

  On the other hand, when there is a cable connection destination, the connection destination cable and the point facility where the connection destination cable is laid can be specified from the cable connection information. Thus, the cable information and the point facility information of the connection destination cable are read from the cable connection storage unit 310 (step S122). When the point facility information is obtained from the connection destination cable in this way, the process returns to step S103, and the wiring point selection unit 314 reads the acquired wiring point information of the cable in the point facility from the wiring point storage unit 316 (step S103). In addition, the process of determining whether or not there is a wiring point in the point equipment from the read wiring point information (step S104) is repeated until the wiring point selection unit 314 detects the wiring point, and the wiring point is determined. If detected, the wiring point selection unit 314 sends the detected wiring point information to the command processing unit 226 according to an instruction from the control unit 210.

  Next, in the determination in step S102, if the read cable type does not match the target (No in step S102), it is necessary to detect the target cable type. The selection unit 314 reads the cable connection information of the cable laid in the point facility specified by the communication medium selector according to the instruction of the control unit 210 from the cable connection storage unit 310 (step S110), and the read cable connection It is determined from the information whether there is a cable connection destination (step S111). If the cable connection destination does not exist, the end point of the cable has been searched, and the target cable cannot be detected, so error processing is performed (step S150), and this processing is terminated.

  On the other hand, if there is a cable connection destination, the wiring point selection unit 314 stores the attribute of the cable in accordance with an instruction from the control unit 210 in order to check the type of the cable specified from the read cable connection information. Read from the unit 312 (step S112). Then, returning to step S102, it is determined whether or not the type of the read cable matches the target (step S102), and the wiring point selection unit 314 detects this until the target cable type is detected. Repeat the process.

  6 shows an example in which the type of communication medium is different at the demand generation point. However, as shown in (a) of FIG. 6, for example, when a new demand using an optical communication medium occurs, As shown in (b) of the figure, only the metal communication medium is laid at the nearest point facility for this new demand, that is, the nearby point facility near the point where the new demand was made. If there is no type, as described above, the cable connection information and the cable type information existing in the point facility of the connection destination specified from the connection information are examined. As shown in FIG. The wiring point is specified by detecting the optical communication medium and finding the wiring point of the optical communication medium as shown in FIG.

  As described above, when a wiring point is detected, that is, it is found that there is a wiring point in the determination in step S104, and when this wiring point information is sent to the command processing unit 226, the command processing unit 226 The wiring point information is received, and the received wiring point information and the optical branching module use condition received first from the communication medium selector are sent to the selection unit 222 according to the instruction of the control unit 210, and the execution of the communication medium selection process is selected. The unit 222 is instructed.

  In the selection unit 222, in accordance with an instruction from the control unit 210, a list of communication medium usage categories that should be preferentially selected by the priority medium extraction unit 1014 from the selection priority order setting unit 1010 and a communication medium usage category storage unit 224. And a list of communication medium usage classifications at the wiring points stored in (step S105), and sends them to the priority comparison unit 1012. In accordance with an instruction from the control unit 210, the priority order comparison unit 1012 uses the priority order that is the priority selection communication medium use classification from the selection priority setting unit 1010 and the communication medium use at the wiring point from the communication medium use classification storage unit 224. The communication medium specifying information is rearranged in the descending order of priority with respect to the communication medium at the wiring point (step S106), and the rearranged result is sent to the priority medium extraction unit 1014.

  More specifically, it is assumed that the selection priority order setting unit 1010 presets the priority order in the order of higher priority, for example, single-core free> terminal free> free. In the communication medium usage classification storage unit 224, as the communication medium usage classification at the wiring point, for example, as shown in FIG. 12, medium number 1: in use, 2: failure, 3-4: single-core empty, It is assumed that the communication medium use classifications 5-8: free, 9-16: terminal free, 21-24: free are stored. In FIG. 12, the cable formed of the aggregate structure is composed of a plurality of tape aggregates, and each tape aggregate is composed of four communication media.

  In such a case, the priority order comparison unit 1012 compares this priority order with the communication medium usage classification, and assigns the communication medium specifying information to the medium number (communication medium specifying information) 3-4 in descending order of priority at the wiring points. They are rearranged as (single-core empty), 9-16 (terminal empty), 5-8, 21-24 (empty), etc., and sent to the priority medium extraction unit 1014.

  When the priority medium extraction unit 1014 receives the communication medium specifying information rearranged in the order of higher priority with respect to the communication medium at the wiring point, the priority medium extraction unit 1014 does not newly disconnect the communication medium from this information; In step S107, it is determined whether or not the selection is possible without splitting into multiple single cores. Note that the new disconnection of the communication medium is not a cable unit disconnection as shown in FIG. 9A (A) or FIG. 9C, for example, but a communication medium (aggregate) included in the cable, For example, in the case of FIG. 9A, the cutting is performed in units of the tape-shaped core set of (A), and in the case of FIG. 9C, the cutting is performed in units of tubes. Therefore, even when a new cable is cut in this way, there is a communication medium of another aggregate that is in use.

  If the communication medium can be selected without being disconnected as a result of the determination as to whether or not the communication medium can be selected without being newly disconnected, the communication medium is rearranged according to an instruction from the control unit 210. The already-selected selectable communication medium specifying information is extracted (step S140) and sent to the optical branching module determining unit 266. As described above, the determination as to whether or not the communication medium can be selected without being disconnected is performed by determining the communication medium specifying information 3-4 (single-core free), 9-16, which are rearranged in order of priority. (Terminal empty), 5-8, 21-24 (empty), etc., but if there is an empty communication medium among those that have already been disconnected and separated as in this case, The communication medium can be selected without disconnecting. In addition, when there is no empty communication medium that has already been cut and separated in this way, a communication medium assembly structure such as a tape assembly or a tube is newly cut and selected. .

  On the other hand, in the determination of step S107, if the communication point cannot be selected without disconnecting the communication medium at the wiring point, it is necessary to disconnect and use the new communication medium. In response to this instruction, the communication medium specifying information that is a disconnection candidate is extracted, and the extracted communication medium specifying information of the disconnection candidate is sent to the cutting medium extraction unit 1024.

  When receiving the disconnection candidate communication medium specifying information, the cutting medium extracting unit 1024 sends the disconnection candidate communication medium specifying information to the leaf cable specifying unit 1026 according to an instruction from the control unit 210. In response to an instruction from the control unit 210, the leaf cable specifying unit 1026 extracts a leaf cable connected to the communication medium from the disconnection candidate communication medium specifying information, and creates a list of leaf cables (step S130). This is sent to the cutting medium extraction unit 1024.

  The cutting medium extraction unit 1024 reads a preset communication medium cutting condition from the communication medium cutting condition setting unit 1020 according to an instruction from the control unit 210 (step S131). As the communication medium disconnection condition, for example, a communication medium with a low communication medium usage rate is preferentially disconnected, a communication with a large number of empty cores is preferentially disconnected, or the number of empty cores is Conditions such as preferentially cutting those that exist more than a predetermined value and whose core wire usage rate is within a predetermined value can be set.

  Further, the cutting medium extraction unit 1024 reads the communication medium use classification included in the leaf medium based on the leaf cable list information from the communication medium use classification storage unit 224 according to an instruction from the control unit 210, and uses the communication medium use rate. The data is sent to the calculation unit 264. Based on the received communication medium usage classification, the communication medium usage rate calculation unit 264 totals the number of communication media to be selected such as a free state and the number of communication media to be excluded from the selection such as in use and failure. The communication medium usage rate is calculated by calculating the number of communication media and dividing the number of communication media not subject to selection by the total number of communication media. The calculated communication medium usage rate is sent to the communication medium usage rate information storage unit 262 in accordance with an instruction from the control unit 210 together with the number of selection target communication media and the number of non-selection target communication media. 262 is stored at a predetermined position.

  The cutting medium extraction unit 1024 instructs the communication medium usage rate of each leaf cable read from the communication medium usage rate information storage unit 262 using the communication medium cutting condition read in step S131 and the leaf cable list as keys, according to an instruction from the control unit 210. Information is sent to the communication medium usage rate comparison unit 1022. When the communication medium usage rate comparison unit 1022 receives the communication medium disconnection condition and the communication medium usage rate information of each leaf cable, the communication medium usage rate of each leaf cable according to the communication medium disconnection condition is instructed by the control unit 210. The information is rearranged (step S132) and sent to the cutting medium extraction unit 1024.

  The cut medium extraction unit 1024 determines whether there is a selectable communication medium that can be cut from the communication medium usage rate information rearranged according to the communication medium cut condition as described above (step S133). . When there is a disconnectable communication medium, the disconnected medium extraction unit 1024 extracts a disconnectable communication medium from the communication medium usage rate information rearranged according to the communication medium disconnection condition (step S140), and the optical branching module The data is sent to the determination unit 266. If there is no disconnectable communication medium, an error process is performed (step S150), and this process ends.

  As described above, in step S140, the optical branching module determining unit 266 selects selectable communication medium specifying information extracted and rearranged in order of priority when the communication medium from step S107 is not disconnected. When disconnecting the communication medium from step S133, when receiving the disconnectable communication medium specifying information extracted from the communication medium usage rate information rearranged according to the communication medium disconnection condition, that is, a list of selectable communication media, The determination unit 414 of the optical branch module determination unit 266 reads the optical branch module specification information connected to the communication medium from the optical branch module connection storage unit 410 according to an instruction from the control unit 210, and further, the optical branch module specification information Based on the optical branch module attribute storage unit 412 Read Le type information (step S141).

  In accordance with an instruction from the control unit 210, the determination unit 414 communicates with the optical branching module that can be used based on the read optical branching module type information and the optical branching module usage condition received first from the communication medium selector. The medium is extracted (step S142) and sent to the selection unit 222.

  The selection unit 222 selects the required number of media from the extracted communication media in accordance with an instruction from the control unit 210 (step S143), and uses this processing result, that is, the specific information of the selected communication media, as a communication medium usage classification. The data is sent to the storage unit 224, the communication medium usage rate calculation unit 264, and the output unit 232.

  When the communication medium use category storage unit 224 receives the selected communication medium specifying information from the selection unit 222, the communication medium use category storage unit 224 changes the use category corresponding to the communication medium specifying information to “in use” according to an instruction from the control unit 210. Further, the communication medium usage rate calculation unit 264 uses the communication medium of the cable including the communication medium that is changed when the communication medium specified by the communication medium specifying information is in use according to an instruction from the control unit 210. The rate is calculated, and the calculation result is sent to the communication medium usage rate information storage unit 262. The communication medium usage rate information storage unit 262 stores the calculated communication medium usage rate at a predetermined position in accordance with an instruction from the control unit 210 (step S144). As described above, when the communication medium usage rate is calculated and stored in the communication medium usage rate information storage unit 262 following the reading of the communication medium disconnection condition in step S131, this step is performed. The calculation and storage of the communication medium usage rate in S144 is not necessary.

  Further, the specific information of the selected communication medium, which is the processing result of the selection unit 222 sent to the output unit 232, is transmitted from the output unit 232 via the input / output interface unit 240 via the input / output interface unit 240 according to an instruction from the control unit 210. The process is terminated (step S141).

  FIG. 7 is a diagram showing an example of an equipment model for explaining improvement of the communication medium usage rate when the communication medium selection device of the present invention is used. As shown in FIG. 5A, the cable laid for simplification is a 4-core tape structure × 100 tapes of 25 tapes, and this 100-core cable is branched into a 60-core cable and a 40-core cable. The 60-core cable is branched into a 40-core cable and a 20-degree cable, and the 40-core cable is further branched into two 20-core cables.

  Further, as shown in FIG. 7B, the connection relation between the communication medium in the cable section A and the communication medium of the leaf cable is such that the communication medium numbers 1 to 20 in the section A are the communication medium numbers of the leaf cable G. No. 1 to No. 20, Section A No. 21 to No. 40 are leaf cable H No. 1 to No. 20, Section A No. 41 to No. 60 are Leaf Cable I No. 1 to No. 20, and Section A No. Numbers 61 to 100 are connected to leaf cables F from number 1 to number 40, respectively. It is assumed that wiring points exist in all point facilities.

  In such a case, in the conventional communication medium selection device, when there is no communication medium that can be used at the wiring point where the demand has occurred, the communication medium is cut and used in order from the youngest number of the communication medium number. The demand generated in the cable sections A and D was to be dealt with by successively disconnecting the communication media connected to the cable section G. For example, even if there is no demand in the cable section G, if there is a total demand of 20 cores or more in the order of the cable sections A and D, the demand generated in the cable section G will be handled thereafter. It was supposed to be impossible.

  On the other hand, in the communication medium selection apparatus according to the present embodiment, selection is performed in consideration of the lower communication medium usage rate, so that it is difficult for the conventional communication medium to be used up with one leaf cable. For example, if the condition is set in the communication medium cutting condition setting unit 1020 so as to select the communication medium connected to the leaf cable having the smallest communication medium usage rate, as described above, the cable section A · Even if the demand for 20 cores is continuously generated in D, the first communication medium selection is selected from the communication medium connected to the cable G, for example, but the cable F or H having a low communication medium usage rate at the time of the second disconnection. Alternatively, the communication medium connected to I is selected, and the number of cuts of the communication medium in the cable sections F, G, H, and I which are leaf cables is 2 tapes (8 cores), 1 It becomes a tape (4 cores), 1 tape (4 cores), and 1 tape (4 cores), and can respond to the demand generated in the cable section G thereafter.

  FIG. 8 is a diagram showing a result of a demand generation simulation based on the equipment model shown in FIG. 7 described above. It is assumed that the generated demand is randomly generated in the cable section A · i. In addition, the simulation is performed 10 times, and an average is obtained with values excluding the maximum value and the minimum value. FIG. 8A shows the state of communication medium usage of a 100-core cable at the time of the communication medium selection device according to the present invention and the conventional one when the demand cannot be met, for example, the communication medium is used up for the generated demand. FIG. 8B is a diagram in which the results are plotted on a graph, the horizontal axis indicates the number of communication media that can be selected, and the vertical axis indicates the tape medium at that time. Indicates the usage rate.

  As shown in FIG. 8, in the conventional communication medium selection apparatus, an average of 49 communication media can be selected and the average tape medium usage rate is 62%, whereas in the communication medium selection apparatus of the present invention, the average 75 communication media can be selected, the tape medium usage rate is 87.5%, and the communication media usage rate is improved by about 25%.

  In the above embodiment, instead of individually inputting the optical branching module usage conditions, a key for specifying the optical branching module usage conditions is input, and a separately stored usage condition that matches this key is read and processed. A method of execution is also possible. In the above-described embodiment, the communication medium forming the aggregate structure has been described. However, the present invention is not limited to this, and the present invention can be similarly applied to a communication medium having a single-core structure.

  Next, with reference to FIG. 15, a communication medium selection device that implements a communication medium selection method according to another embodiment of the present invention will be described. In the embodiment shown in FIG. 1, the communication medium selection device shown in FIG. 1 detects a wiring point from which the communication medium can be taken out. However, when the communication medium cannot be selected without newly cutting the communication medium at this wiring point, 1 is functionally different from the embodiment of FIG. 1 in that a branch area generated when branching into a shape is determined, and a communication medium that can be disconnected is extracted from the branch area. Is obtained by adding the number of individual cable inventory cores belonging to the branch area below the demand point every time a communication medium is selected instead of the communication medium usage rate calculation unit 264 and the communication medium usage rate information storage unit 262. The branch area stock medium number calculating unit 265 constituting the branch area stock medium number calculating means for calculating the branch area stock medium number for each branch area and the calculated branch area stock medium Each branch area stock medium number storage unit 263 that constitutes a branch area stock medium number storage unit that stores the number of branch area stock media is provided, and the function of the selection unit 222 is indicated by reference numeral 222a, and is shown in FIG. The other configurations and operations are the same, and the same components are denoted by the same reference numerals.

  Here, before describing the present embodiment in detail with reference to the drawings, terms used in the present embodiment will be described.

  A wiring block is a logical area set for calculating the number of communication medium demands, and has attributes such as the number of subscribers and an average medium demand ratio.

  The branch area will be described with reference to FIG. As shown in FIG. 19, the cable is wired while repeating branching from the communication device accommodating station, and generally takes a tree shape. The branch area means an area including all of the lower cable tree at the cable branch point. For example, in the case of bifurcation as shown at branch point 1 in FIG. 19, there are two cable trees below the branch point, and branch areas 1-1 and 1-2 including the respective cable trees are provided. can get. When a cable is further branched in a certain branch area, there is a branch area in each, so the branch area has an inclusion structure.

  As shown in FIG. 16, the branch area inventory medium number calculation unit 265 includes a calculation rule setting unit 1110 that constitutes a calculation rule setting unit, a wiring block attribute storage unit 1113 that constitutes a wiring block attribute information storage unit, and a calculation. It is comprised from the calculation part 1114 which comprises the calculation means which calculates the number of inventory media based on a rule.

  In addition, the selection unit 222a replaces the communication medium usage rate comparison unit 1022 and the leaf cable identification unit 1026 in the selection unit 222 shown in FIG. 3 with a communication medium stock quantity comparison unit 1023, a cable tree information extraction unit, and a branch area. The difference is that each has a cable tree search unit 1027 constituting the information generation means, the other configurations and operations are the same, and the same components are denoted by the same reference numerals.

  Next, the operation of the communication medium selection device according to the present embodiment shown in FIG. 15 will be described with reference to the flowchart shown in FIG. Note that the present operation, that is, the flowchart shown in FIG. 18, differs only in that steps S130a, S130b, S130c, S132a, and S144a are provided instead of steps S130, S132, and S144 in the flowchart shown in FIG. Since the other steps are the same, the illustration of the steps before step S107 is omitted. Therefore, in this description, the operation after step S107 including different parts will be described.

  In the determination of step S107 in FIG. 18, if the communication point cannot be selected without disconnecting the communication medium at the wiring point, it is necessary to disconnect and use the new communication medium. In response to the instruction 210, the communication medium specifying information that is a disconnection candidate is extracted, and the extracted communication medium specifying information of the disconnection candidate is sent to the cutting medium extraction unit 1024.

  When receiving the disconnection candidate communication medium specifying information, the disconnection medium extracting unit 1024 sends the disconnection candidate communication medium specifying information to the cable tree search unit 1027 according to an instruction from the control unit 210. The cable tree search unit 1027 extracts the cable connection information from the cable connection storage unit 310 according to an instruction from the control unit 210, and determines the cable connected to the communication medium from the communication medium specifying information of the disconnection candidate and the cable connection information. Tree structure information is extracted (step S130a), and an area including the entire cable tree is determined as a branch area. Further, branch area information is extracted for each branch point existing in the branch area. When all branch areas are extracted, the cable tree structure information and the branch area information are sent to the calculation unit 1114 of the branch area inventory medium number calculation unit 265.

  The calculation unit 1114 reads the preset inventory medium number calculation rule from the calculation rule setting unit 1110 according to an instruction from the control unit 210 (step S130b). Note that as the inventory medium number calculation rule, a plurality of medium calculation rules such as the cable inventory medium number and the branch area inventory medium number can be set. The number of cable stock media is the number of existing media for each physical cable, and the number of branch area stock media is the sum of the number of cable stock media present in the branch area. The cable inventory medium number is calculated by subtracting the actual used medium number and the potential demand medium number from the cable actual medium number. As a calculation rule, for example, the potential demand medium number is obtained from the subscriber number and the medium demand rate. Calculated assuming a Poisson distribution, calculated by multiplying by a constant coefficient, or calculated as a function that varies over time, and predicts the media failure rate in advance or reserve media in advance. Set.

  Further, the calculation unit 1114 reads the communication medium use category of the designated cable from the communication medium use category storage unit 224 according to an instruction from the control unit 210, and wiring areas such as the number of users and the medium demand rate necessary for calculating the number of potential demands. Of the cable stock medium is read from the wiring area attribute storage unit 1113, the number of cable stock media is calculated according to the read calculation rule, and the number of cable stock media is added according to the read branch area information. Is calculated (step S130c). The calculation result is sent to the branch area inventory medium number storage unit 263 according to an instruction from the control unit 210, and the branch area inventory medium number storage unit 263 determines the branch area inventory medium number together with the branch area information according to an instruction from the control unit 210. Memorize in position.

  The cutting medium extraction unit 1024 reads a preset communication medium cutting condition from the communication medium cutting condition setting unit 1020 according to an instruction from the control unit 210 (step S131). As a communication medium disconnection condition, priority is given to cutting a leaf cable belonging to a branch area having a large number of branch area inventory media, or when the number of inventory media is the same, the smaller actual use number is prioritized. Settings such as disconnection are possible.

For example, in FIG. 19, it is assumed that each branch area stock medium number satisfies the following condition. Branch area 1-1> branch area 1-2, branch area 2-1 <branch area 2-2, branch area 3-1> branch area 3-2, branch area 4-1 <branch area 4-2. In this case, the cutting priority is the order of the media connected to the leaf cable belonging to the next branch area. Branch area 2-2, branch area 4-2, branch area 4-1, branch area 3-1, branch area 3-2. This is obtained when the process is repeated until each branch point has an area with a large number of branch area inventory media (pruning), leaf cables are selected, and all leaf cables are extracted. The order is the same.

  The cutting medium extraction unit 1024 reads the branch area information and the branch area inventory medium number stored in the branch area inventory medium number storage unit 263 according to an instruction from the control unit 210, and together with the communication medium cutting condition that has been read, the communication medium This is sent to the inventory quantity comparison unit 1023. The communication medium stock quantity comparison unit 1023 rearranges the branch area information in accordance with the communication medium disconnection condition according to the instruction from the control unit 210 (step S132a), and sends the rearranged branch area information to the cut medium extraction unit 1024.

  The cut medium extraction unit 1024 determines whether there is a selectable communication medium that can be cut from the branch area inventory information rearranged according to the communication medium cut condition as described above (step S133). If there is a disconnectable communication medium, the disconnected medium extraction unit 1024 extracts a disconnectable communication medium from the branch area inventory information rearranged according to the communication medium disconnection condition (step S140), and determines the optical branching module. Send to part 266. If there is no disconnectable communication medium, an error process is performed (step S150), and this process ends.

  In step S140, the optical branching module determining unit 266 selects the selectable communication medium specifying information rearranged in the descending order of priority when the communication medium from step S107 is not disconnected, or the communication from step S133. Upon receiving the disconnectable communication medium specifying information extracted from the communication medium usage rate information rearranged in accordance with the communication medium disconnection condition when the medium is disconnected, that is, when a list of selectable communication media is received, the optical branching module determining unit The determination unit 414 of 266 reads the optical branching module specifying information connected to the communication medium from the optical branching module connection storage unit 410 according to the instruction of the control unit 210, and further, based on the optical branching module specifying information, the optical branching module Read optical branch module type information from attribute storage unit 412 Writing (step S141).

  In accordance with an instruction from the control unit 210, the determination unit 414 communicates with the optical branching module that can be used based on the read optical branching module type information and the optical branching module usage condition received first from the communication medium selector. The medium is extracted (step S142) and sent to the selection unit 222.

  The selection unit 222 selects the required number of media from the extracted communication media in accordance with an instruction from the control unit 210 (step S143), and uses this processing result, that is, the specific information of the selected communication media, as a communication media usage classification. The data is sent to the storage unit 224 and the output unit 232.

  Upon receiving the communication medium specifying information selected from the selection unit 222, the communication medium use classification storage unit 224 changes the use classification corresponding to the communication medium specifying information to “in use” according to an instruction from the control unit 210 (step S144a). ). In the description of this operation, the procedure for calculating the number of branch area inventory media for each branch area at the stage before selection as described above has been described. However, the number of branch area inventory media at the stage after selection, that is, at step S144a. May be calculated and stored.

  The processing procedure of the communication medium selection method of the above embodiment is recorded as a program on a recording medium such as a CD or FD, and this recording medium is incorporated into a computer system, or the program recorded on the recording medium is connected to a communication line. Of course, it is possible to function as a communication medium selection device that implements a communication medium selection method by downloading to a computer system via a computer or installing from a recording medium and operating the computer system with the program. By using such a recording medium, it is possible to improve its circulation.

It is a block diagram which shows the structure of the communication medium selection apparatus concerning one Embodiment of this invention. It is a block diagram which shows the structure of the wiring point specific | specification part currently used for the communication medium selection apparatus shown in FIG. It is a block diagram which shows the structure of the selection part currently used for the communication medium selection apparatus shown in FIG. It is a block diagram which shows the structure of the optical branching module judgment part used for the communication medium selection apparatus shown in FIG. It is a flowchart which shows the effect | action of the communication medium selection apparatus shown in FIG. It is a figure which shows an example in case a communication medium type differs in a demand generation point. The example of the equipment model for demonstrating the improvement of the communication medium usage rate at the time of using the communication medium selection apparatus of this invention is shown. It is a figure which shows the result of having performed the demand generation simulation on the assumption of the equipment model shown in FIG. It is a figure for demonstrating the communication medium which makes an aggregate structure, and its cutting | disconnection. It is a figure for demonstrating the point installation, wiring point, upper part, lower part, and leaf cable which are used by this invention. It is a figure for demonstrating an optical branching module. It is a figure which shows the use classification of the communication medium in a wiring point. It is a block diagram which shows the structure of the conventional communication medium selection apparatus. It is a figure which shows the response | compatibility of many: 1 in which a some point installation respond | corresponds to one wiring point. It is a block diagram which shows the communication medium selection apparatus which implements the communication medium selection method concerning other embodiment of this invention. It is a block diagram which shows the structure of the branch area stock medium number calculation part used for the communication medium selection apparatus shown in FIG. It is a block diagram which shows the structure of the selection part currently used for the communication medium selection apparatus shown in FIG. It is a flowchart which shows the effect | action of the communication medium selection apparatus shown in FIG. It is a figure for demonstrating a branch area.

Explanation of symbols

210 control unit 222, 222a selection unit 224 communication medium usage classification storage unit 226 command processing unit 262 communication medium usage rate information storage unit 263 branch area inventory medium number storage unit 264 communication medium usage rate calculation unit 265 branch area inventory medium number calculation unit 266 Optical branch module determination unit 310 Cable connection storage unit 312 Cable attribute storage unit 314 Wiring point selection unit 316 Wiring point storage unit 410 Optical branch module connection storage unit 412 Optical branch module attribute storage unit 414 Judgment unit 1010 Selection priority setting unit 1012 Priority comparison unit 1014 Priority medium extraction unit 1020 Communication medium disconnection condition setting unit 1022 Communication medium usage rate comparison unit 1023 Communication medium stock quantity comparison unit 1024 Disconnection medium extraction unit 1026 Leaf cable identification unit 1027 Cable tree search unit 1110 Calculation rule setting unit 1113 wiring block attribute storage unit 1114 calculating section

Claims (9)

A communication medium selection device for selecting a communication medium for a demand point from a cable configured by combining a plurality of communication media,
A branch area inventory medium number calculating means for calculating the number of branch area inventory media for each branch area obtained by adding the number of individual cable inventory cores belonging to the branch area below the demand point every time a communication medium is selected;
Branch area inventory medium number storage means for storing the calculated branch area inventory medium number for each branch area;
In selecting a communication medium, the number of branch area stock media in each branch area below the demand generation point is read from the branch area stock medium number storage means, compared for each branch area, and communication media is selected based on the comparison result. A communication medium selecting device comprising: a medium selecting means; The branch area inventory medium number calculating means includes:
Calculation rule setting means for setting in advance a rule for calculating the number of branch area stock media in each branch area;
Wiring block attribute storage means for storing attributes including the number of users of the wiring block and the average demand ratio within a range in which the individual cables required to calculate the branch area inventory medium number can provide the communication medium;
An attribute reading means for reading an attribute including a use state of a communication medium necessary for calculating the number of cable stock media of the designated cable in the branch area;
2. The communication according to claim 1, further comprising: calculating means for calculating the branch area inventory medium number from the attribute in the wiring block, the attribute of the communication medium of the designated cable, and the calculation rule for the branch area inventory medium number. Medium selection device. The communication medium selection means includes
A branch area range setting unit that generates cable tree information on the lower side of the designated wiring point from the cable connection information, and determines a branch area range by the generated cable tree,
Branch area stock medium number comparison means for comparing the number of branch area stock media in each branch area;
The communication medium selection device according to claim 1, further comprising priority medium extraction means for extracting communication media in accordance with a preset priority order. A communication medium selection method for selecting a communication medium for a demand point from a cable configured by combining a plurality of communication media,
Calculate the number of branch area inventory media for each branch area obtained by adding the number of individual cable inventory cores belonging to the branch area below the demand point each time a communication medium is selected.
Store the calculated branch area inventory medium number for each branch area,
In selecting the communication medium, the number of branch area inventory media in each branch area below the demand generation point is read from the branch area inventory medium number storage means and compared for each branch area, and the communication medium is selected based on the comparison result. A communication medium selection method characterized by the above. The process of calculating the branch area inventory medium number is as follows:
Pre-set rules to calculate the number of branch area inventory media in each branch area,
Store attributes including the number of users of the wiring block and the average demand rate to which the individual cables required to calculate the branch area inventory media number can provide communication media;
Read the attributes including the usage status of the communication media required to calculate the number of cable stock media for the specified cable in the branch area,
5. The communication medium selection method according to claim 4, wherein the branch area inventory medium number is calculated from an attribute in the wiring block, an attribute of the communication medium of the designated cable, and a calculation rule for the branch area inventory medium number. The process of selecting the communication medium includes
Generate cable tree information on the lower side of the specified wiring point from the cable connection information, define the range of the branch area by this generated cable tree,
Compare the number of branch area stock media in each branch area,
5. The communication medium selection method according to claim 4, wherein the communication medium is extracted according to a preset priority order. A recording medium that records a communication medium selection program for selecting a communication medium for a demand point from a cable configured by combining a plurality of communication media,
Calculate the number of branch area inventory media for each branch area obtained by adding the number of individual cable inventory cores belonging to the branch area below the demand point each time a communication medium is selected.
Store the calculated branch area inventory medium number for each branch area,
In selecting the communication medium, the number of branch area inventory media in each branch area below the demand generation point is read from the branch area inventory medium number storage means and compared for each branch area, and the communication medium is selected based on the comparison result. The recording medium which recorded the communication medium selection program characterized by these. The process of calculating the branch area inventory medium number is as follows:
Pre-set rules to calculate the number of branch area inventory media in each branch area,
Store attributes including the number of users of the wiring block and the average demand rate to which the individual cables required to calculate the branch area inventory media number can provide communication media;
Read the attributes including the usage status of the communication media required to calculate the number of cable stock media for the specified cable in the branch area,
8. The communication medium selection program according to claim 7, wherein the branch area inventory medium number is calculated from the attribute in the wiring block, the communication medium attribute of the designated cable, and the calculation rule for the branch area inventory medium number. Recording medium. The process of selecting the communication medium includes
Generate cable tree information on the lower side of the specified wiring point from the cable connection information, define the range of the branch area by this generated cable tree,
Compare the number of branch area stock media in each branch area,
8. The recording medium recording the communication medium selection program according to claim 7, wherein the communication medium is extracted according to a preset priority order.