JP6051823B2 - Information terminal and line allocation method - Google Patents

Description

  The present invention relates to an information terminal and a line allocation method that can secure a communication line without congestion.

  It is an important issue to grasp the safety information of the safety situation and the disaster situation at the time of disaster. However, in the event of a disaster, it is assumed that the communication network that collects safety information will be unusable because it is divided itself, or it will be unusable because a large amount of access will be concentrated in a short time and usage restrictions will be applied. The

  In Patent Document 1, as a method of collecting safety information at the time of a disaster, a safety confirmation system that uses a satellite communication line and limits the data amount of safety information transmitted from an information terminal by a command from the center side, and an apparatus therefor Is disclosed.

JP 2004-297131 A

  The technology of Patent Document 1 uses a satellite communication link of a communication satellite that is less susceptible to disasters than a terrestrial communication system, and collects a limited amount of safety information from an information terminal during a disaster. A system and apparatus are disclosed. However, this technology has a problem that when the information terminal transmits safety information, access to the satellite communication line is concentrated and the satellite communication line cannot be easily secured. In other words, it cannot cope with the access concentration expected at the time of disaster. Therefore, how to easily secure a communication line without congestion becomes a problem. “Securing the communication line without congestion” means that the communication line can be immediately secured without delay when attempting to secure the communication line.

  The present invention has been made in view of the above situation, and it is an object of the present invention to provide an information terminal and a line allocation method for securing a communication line without congestion.

  An information terminal according to the present invention includes an identification information storage unit that stores identification information, and a communication unit that uses a communication line preassigned by the identification information.

  The line allocation method of the present invention is characterized in that identification information is stored in an information terminal, and a communication line used by the information terminal is preassigned based on the identification information.

  According to the present invention, since the communication terminal to be used is pre-assigned by the identification information, the information terminal can secure the communication line without congestion.

1 is a system diagram illustrating a system configuration example of a first exemplary embodiment of the present invention. It is a system diagram which shows the system configuration example of the 2nd Embodiment of this invention. It is a system diagram which shows the system configuration example of the 3rd Embodiment of this invention. It is explanatory drawing of the example of a communication system of the 3rd Embodiment of this invention. It is a system diagram which shows the system configuration example of the 4th Embodiment of this invention. It is a system diagram which shows the system configuration example of the 5th Embodiment of this invention. It is explanatory drawing of the normal time of the system configuration example of the 5th Embodiment of this invention. It is explanatory drawing at the time of disaster of the system configuration example of the 5th Embodiment of this invention. It is a system diagram which shows the system configuration example of the 6th Embodiment of this invention.

Embodiments of the present invention will be described below in detail with reference to the drawings.
(First embodiment)
A first embodiment of the present invention will be described. FIG. 1 is a system diagram of a system configuration example according to the first embodiment of this invention. With reference to FIG. 1, the structure of the 1st Embodiment of this invention is demonstrated. In the present embodiment, information terminals 1-1, 1-2,..., 1-n (n is an integer of 1 or more) and a host device 2 are provided. The information terminals 1-1, 1-2,..., 1 -n communicate with the host device 2 via a communication line. The information terminals 1-1, 1-2,..., 1-n include a communication unit 1a and an identification information storage unit 1b. The host device 2 collects information by communicating with the information terminals 1-1, 1-2, ..., 1-n. In the present embodiment, the host device 2 is exemplified as a system for collecting information, but the present invention is not limited to collecting information.

  The operation of the first embodiment of the present invention will be described with reference to FIG. The host device 2 broadcasts information request signals to the information terminals 1-1, 1-2,..., 1-n so as to transmit predetermined information via the communication line. The information terminals 1-1, 1-2,..., 1-n that have received the information request signal prepare and respond to predetermined information.

  The information terminals 1-1, 1-2,..., 1 -n are each managed with a unique terminal ID assigned in advance. The information identification storage means 1b stores this terminal ID. And the communication line which information terminal 1-1, 1-2, ..., 1-n communicates with the high-order apparatus 2 is pre-assigned by each terminal ID. The communication means 1a communicates with the host device using the preassigned communication line.

  Therefore, the information terminals 1-1, 1-2,..., 1-n can easily use the communication lines preassigned by the terminal IDs without easily congesting predetermined information with each other. 2 can be automatically answered. The host device 2 can collect predetermined information that is automatically answered from the information terminals 1-1, 1-2, to 1-n.

  As described above, in the first embodiment of the present invention, there is an effect that a communication line can be secured and communication can be performed without congestion.

In the present embodiment, the host device has been described as an information collection system that collects information from an information terminal. However, the present invention is not limited to the information collection system. The present invention provides an information reporting system in which an information terminal voluntarily reports information, or a host device individually designates an information terminal to transmit a command, and the designated information terminal accepts the command and responds to the command. Various response systems such as a response system that returns That is, the present invention can be applied if the communication line used by the information terminal is preassigned according to the identification information.
(Second Embodiment)
A second embodiment of the present invention will be described. FIG. 2 is a system diagram of a system configuration example according to the second embodiment of this invention. With reference to FIG. 2, the structure of the 2nd Embodiment of this invention is demonstrated. The system of FIG. 2 has the same configuration as that of FIG. 1 except that the communication line a includes a plurality of communication lines. Therefore, the same name is attached | subjected to the same structure and the same number, and description is abbreviate | omitted.

  With reference to FIG. 2, the operation of the second exemplary embodiment of the present invention will be described. The host device 2 broadcasts information request signals to the information terminals 1-1, 1-2,..., 1-n so as to transmit predetermined information via a communication line. The information terminals 1-1, 1-2,..., 1-n that have received the information request signal prepare and respond to predetermined information.

  The information terminals 1-1, 1-2,..., 1 -n are each managed with a unique terminal ID assigned in advance. The information identification storage means 1b stores this terminal ID. The communication lines used by the information terminals 1-1, 1-2,..., 1 -n for communication with the host device 2 are the communication lines selected from the communication line a according to the respective terminal IDs. The line is preassigned. The communication means 1a communicates with the host device using the preassigned communication line.

Therefore, this embodiment can obtain the same effect as the first embodiment.
(Third embodiment)
A third embodiment of the present invention will be described. FIG. 3 is a system diagram of a system configuration example according to the third embodiment of the present invention. With reference to FIG. 3, the structure of the 3rd Embodiment of this invention is demonstrated. The system in FIG. 3 has the same configuration as that in FIG. 2 except that the communication line b and the communication line c have different communication methods. Therefore, the same name is attached | subjected to the same structure and the same number, and description is abbreviate | omitted.

  The operation of the third embodiment of the present invention will be described with reference to FIG. The host device 2 broadcasts information request signals for requesting transmission of predetermined information to the information terminals 1-1, 1-2,..., 1-n via a communication line. The information terminals 1-1, 1-2,..., 1-n that have received the information request signal prepare and respond to predetermined information.

  The information terminals 1-1, 1-2,..., 1 -n are each managed with a unique terminal ID assigned in advance. The information identification storage means 1b stores this terminal ID. Then, the communication lines through which the information terminals 1-1, 1-2,..., 1-n communicate with the host device 2 are preselected from the communication lines b or c according to the respective terminal IDs. Assigned. The communication means 1a communicates with the host device using the preassigned communication line.

  The terminal ID includes, for example, a communication parameter b for identifying each of a plurality of communication lines of the communication line b using FDMA (Frequency Division Multiple Access) as the first communication method. Further, the terminal ID includes, for example, a communication parameter c for identifying each of the plurality of communication lines c using the TDMA (Time Division Multiple Access) as the second communication method. Therefore, the communication line used by the information terminals 1-1, 1-2,..., 1-n is selected from the communication line b or c according to the respective terminal IDs including the communication parameter b and the communication parameter c. A new communication line is preassigned.

  The communication parameter b uniquely specifies a frequency or frequency channel used in FDMA used as a communication method for the communication line b. The communication parameter c uniquely specifies a time slot in TDMA used as a communication method for the communication line c. At this time, a communication line using both the first communication method and the second communication method specified by both the communication parameter b and the communication parameter c may be included.

  Thus, this embodiment can use a preassigned communication line according to each terminal ID assigned to the information terminal, as in the first embodiment and the second embodiment. This embodiment can obtain the same effects as those of the first embodiment and the second embodiment.

  In the present embodiment, the FDMA and TDMA multiplexing systems have been described as communication systems, but the present invention is not limited to these. That is, the present invention can apply another method, for example, CDMA (Code Division Multiple Access) as a multiplexing method. Further, in the present embodiment, the description has been made by using communication lines with different multiplexing methods as communication methods, but the present invention is not limited to these. That is, the present invention can be applied in various combinations such as a satellite communication line and a ground communication line, a wireless communication line and a wired communication line, a public line and a dedicated line.

  In the present embodiment, two different communication lines b and c have been described, but the present invention is not limited to two. That is, the present invention can be applied to any line that can be uniquely specified according to the terminal ID.

  FIG. 4 is an explanatory diagram in the case of using CDMA, FDMA, and TDMA together as an example of the communication method of this embodiment. This will be described with reference to FIG.

  The terminal IDs assigned to the information terminals 1-1, 1-2,..., 1 -n shall include the respective communication parameters of the multiplexing scheme shown in FIG. That is, the terminal ID uniquely indicates a spreading code used in CDMA, a frequency or frequency channel used in FDMA, and a time slot specified in TDMA in order to allocate a communication line. According to the terminal ID, a communication line using CDMA, FDMA and TDMA in combination can be uniquely assigned.

  A specific example of a method of associating a communication line configured by combining three types of communication schemes, for example, CDMA, FDMA, and TDMA with a terminal ID will be described below.

  The terminal ID is uniquely set and managed in the management area. The numerical value indicating the terminal ID is X, the number of spreading codes in realizing CDMA is A, and the number of frequency channels in FDMA is B. Here, the following remainder calculation is performed.

X (modA) = Ma
Ma is a numerical value indicating a remainder obtained by dividing X by A.

Here, if Na is a quotient obtained by dividing X by A, the numerical value X indicating the terminal ID is:
X = Na * A + Ma
It is expressed.

  Further, the following remainder calculation is performed for Na.

Na (modB) = Mb
Mb is a numerical value indicating a remainder obtained by dividing Na by B.

Here, if Nb is a quotient obtained by dividing Na by B, Na is
Na = Nb * B + Mb
It is expressed.

Organizing the above,
X = Na * A + Ma = (Nb * B + Mb) * A + Ma
Thus, the numerical value X indicating the terminal ID is uniquely expressed using Ma, Mb, and Nb.

  Therefore, by assigning a communication line by specifying a spread code in CDMA with Ma, specifying a frequency channel in FDMA with Mb, and specifying a TDMA time slot with Nb, communication lines can be assigned by terminal ID. Become.

The same applies to a method of associating a communication line configured by combining two types of communication methods with a terminal ID. That is, if the remainder calculation performed twice in the above method is performed only once, the numerical value X indicating the terminal ID is
X = Na * A + Ma
Thus, communication lines can be assigned using Na and Ma.

In the present embodiment, the assignment by the numerical value X indicating the terminal ID has been described, but the present invention is not limited to this. For example, when the numerical value X indicating the terminal ID is expressed by 28 bits, the upper 2 bits indicate the type of the terminal ID, and the next upper 8 bits specify the spreading code in CDMA. The remaining upper 6 bits specify a frequency channel in FDMA, and the remaining 12 bits specify a TDMA time slot. Such a method can also be applied to the present invention. That is, the present invention can be applied if the communication line to be used is preassigned according to the terminal ID.
(Fourth embodiment)
A fourth embodiment of the present invention will be described. FIG. 5 is a system diagram of a system configuration example according to the fifth embodiment of the present invention. With reference to FIG. 5, the structure of the 5th Embodiment of this invention is demonstrated. The system of FIG. 5 has the same configuration as that of FIG. 2 except that it includes an upstream communication line d from the information terminal to the host device and a downstream communication line e from the host device to the information terminal. Therefore, the same name is attached | subjected to the same structure and the same number, and description is abbreviate | omitted.

  The operation of the fourth embodiment of the present invention will be described with reference to FIG. The host device 2 broadcasts information request signals to the information terminals 1-1, 1-2,..., 1-n so as to transmit predetermined information via the downlink communication line e. The information terminals 1-1, 1-2,..., 1-n that have received the information request signal prepare and respond to predetermined information.

  The information terminals 1-1, 1-2,..., 1 -n are each managed with a unique terminal ID assigned in advance. The information identification storage means 1b stores this terminal ID. Then, the upstream communication line d through which the information terminals 1-1, 1-2,..., 1-n communicate with the host device 2 is the communication line selected from the communication line d according to the respective terminal IDs. Pre-assigned. The communication means 1a communicates with the host device using the preassigned communication line.

  Therefore, this embodiment can obtain the same effects as those of the first to third embodiments.

In the communication line of this embodiment, the upstream communication line to the higher-level device and the downstream communication line from the higher-level device can have different communication methods. That is, the uplink communication line transmitted from the information terminal to the host device is preassigned according to the terminal ID of each information terminal. On the other hand, the downlink communication line from the host device to the information terminal can transmit an information request signal to the information terminal using a broadcast signal including local broadcast such as AM radio broadcast, FM broadcast, and TV broadcast. Therefore, the present invention can be applied to various communication systems corresponding to communication situations assumed at the time of disaster or when a failure occurs.
(Fifth embodiment)
A fifth embodiment of the present invention will be described. FIG. 6 is a system diagram showing a system configuration example according to the fifth embodiment of the present invention. FIG. 7 is an explanatory diagram of a normal system configuration example according to the fifth embodiment of this invention. FIG. 8 is an explanatory diagram at the time of disaster of the system configuration example of the fifth exemplary embodiment of the present invention.

  The system of the fifth embodiment of the present invention in FIG. 6 shows a system for collecting safety information. The configuration of the present embodiment will be described with reference to FIG. The present embodiment includes a satellite terminal 10, a communication satellite 20, a tracking control station 30, and a safety confirmation center 40. The safety confirmation center 40 includes a main control station 41, a terminal management server 42, and a safety confirmation information server 43.

  The satellite terminal 10 is a terminal that receives an emergency broadcast signal and prompts the user of the satellite terminal 10 to input safety information. The user of the satellite terminal 10 prompted to input the safety information inputs the safety information. The satellite terminal 10 to which the safety information is input transmits a safety information signal using the satellite communication line preassigned according to the terminal ID.

  The communication satellite 20 receives an emergency broadcast signal from the tracking control station 30, converts the frequency of the emergency broadcast signal into a frequency band with the satellite terminal 10, and transmits it. The emergency broadcast signal is broadcast to all the satellite terminals 10 in the satellite reception area 50. The communication satellite 20 receives the safety information signal from the satellite terminal 10, converts the frequency of the safety information signal into a frequency band with the tracking control station 30, and transmits it. Thus, the communication satellite 20 relays communication between the satellite terminal 10 and the tracking control station 30.

  The tracking control station 30 performs tracking control of the communication satellite 20, receives emergency broadcast signal data from the main control station 41 of the safety confirmation center 40, converts it into a radio signal in a frequency band with the communication satellite 20, and transmits it. To do. Also, the safety information signal is received from the satellite terminal 10 as a radio signal in the frequency band with the communication satellite 20, converted into safety information signal data and transmitted to the main control station 41. Thus, the tracking control station 30 relays communication between the satellite terminal 10 via the communication satellite 20 and the main control station 41.

  The main control station 41 controls the communication satellite 20 via the tracking control station 30. In the event of a disaster, an emergency broadcast signal is broadcast to the satellite terminal 10 to prompt collection of safety confirmation.

  The terminal management server 42 performs registration management of terminal information such as the terminal ID of the satellite terminal 10.

  The safety confirmation information server 43 performs registration management of safety information from the satellite terminal 10.

  In this embodiment, the satellite terminal 10 is given a unique terminal ID within the management area 60. The terminal ID is used for identification of the satellite terminal 10 and pre-assignment of line assignment including multiplexing of the satellite communication line from the satellite terminal 10 to the communication satellite 20. The terminal ID is registered in the terminal management server 42 of the safety confirmation center 40.

  FIG. 7 is an explanatory diagram of a normal system configuration example according to the embodiment of this invention. With reference to FIG. 7, the normal operation of the present embodiment will be described.

  The management area 60 is an area where the satellite terminal 10 is registered. The management area 61 is a management area where the satellite terminal 10 is moved. The satellite terminal 10 that has moved to the management area 61 is updated as the satellite terminal 11 in the management area 61. Except this, it has the same configuration as FIG. The same components as those in FIG. 6 are denoted by the same names and the same numbers, and description thereof is omitted.

  When the satellite terminal 10 of FIG. 7 moves from the management area 60 to the management area 61, the satellite terminal 10 acquires a unique terminal ID in the management area 61 of the movement destination and is updated by the terminal management server 42. The update is performed by the user of the satellite terminal 10 or the satellite terminal 10 detects the area movement based on the position information calculated using the positioning satellite and prompts the user of the satellite terminal 10 to update the satellite. It is input by the user of the terminal 10, or area movement is detected according to the calculated position information, and the satellite terminal 10 automatically performs it. In any case, the management information of the satellite terminal 10 in the management area 60 is transmitted from the satellite terminal 10 in the management area 60 to the satellite terminal 11 in the management area 61 when the management area is moved (from the management area 60 to the management area 61). And updated at the terminal management server 42.

  FIG. 8 is an explanatory diagram at the time of disaster of the system configuration example according to the embodiment of this invention. With reference to FIG. 8, the operation | movement at the time of disaster of this embodiment is demonstrated.

  A satellite terminal 70a is located in the management area 70, and a satellite terminal 71a is located in the management area 71. Except this, it has the same configuration as FIG. The same components as those in FIG. 6 are denoted by the same names and the same numbers, and description thereof is omitted.

  The main control station 41 of the safety confirmation center 40 in FIG. 8 specifies the safety request target area 70 for collecting the safety information by comparing the disaster occurrence area with the management area unit at the time of a disaster. The main control station 41 includes area information for designating the safety confirmation target area 70 in the emergency broadcast signal and broadcasts it to the satellite terminals 70a and 71a via the tracking control station 30 and the communication satellite 20.

  The satellite terminal 70a located in the management area 70 receives the emergency broadcast signal and detects that the area information (designated management area 70) included in the emergency broadcast signal is its own management area 70. Therefore, the satellite terminal 70a prompts the user of the satellite terminal 70a to input safety information. Then, the satellite terminal 70a automatically transmits the safety information input by the user as a safety information signal to the communication satellite 20 using the satellite communication line preassigned according to the terminal ID. The communication satellite 20 relays the safety information signal from the satellite terminal 70a to the tracking control station 30. The tracking control station 30 relays the safety information signal from the communication satellite 20 to the main control station 41. The main control station 41 receives the safety information from the tracking control station 30 and stores it in the safety confirmation information server 43.

  In addition, the main control station 41 transmits the confirmation of receipt of the safety information from the satellite terminal 70a in the emergency broadcast signal. The satellite terminal 70a confirms the receipt confirmation of its own safety information included in the emergency broadcast signal, and completes the transmission of the safety information.

  On the other hand, the satellite terminal 71a located in the management area 71 receives the emergency broadcast signal and detects that the area information (designated management area 70) included in the emergency broadcast signal is not its own management area 71. Therefore, the satellite terminal 71a does not prompt the user of the satellite terminal 71a to input safety information.

  As described above, the safety information of the satellite terminal 70a in the safety confirmation target area 70 is transmitted to the safety confirmation information server 43 without congestion using the satellite communication line preassigned according to the unique terminal ID in the management area 70. Can be stored.

As described above, in the fifth embodiment of the present invention, each satellite terminal is uniquely assigned with a terminal ID in each management area. In each management area, each uniquely assigned terminal ID is used for pre-assignment of a satellite communication line to the communication satellite 20. Therefore, when the main control station 41 designates a management area as a safety request target area and requests safety information, each satellite terminal located in the designated management area is assigned a satellite preassigned according to each terminal ID. A communication line can be secured without congestion. The safety information of the designated management area is collected without delay from each satellite terminal located in the management area using a satellite communication line.
(Sixth embodiment)
A sixth embodiment of the present invention will be described. FIG. 9 is a system diagram showing a system configuration example according to the sixth embodiment of the present invention.

  The configuration of the present embodiment will be described with reference to FIG. The present embodiment includes management areas 60a, 60b, and 60c, and has the same configuration as that of FIG. 6 except that the satellite terminals 10a, 10b, and 10c are located in the respective management areas. The same components as those in FIG. 6 are denoted by the same names and the same numbers, and description thereof is omitted.

  When registering in the management area 60a, the satellite terminal 10a in FIG. 9 also registers the management area 60b that is assumed in advance as a stopover for the satellite terminal 10a. Therefore, the satellite terminal 10a is given a unique terminal ID in the management area 60a. Then, a unique terminal ID is assigned also in the management area 60b, and is registered in the terminal management server 42 of the safety confirmation center 40 as the satellite terminal 10b.

  The satellite terminal 10a may input the management area 60a or 60b in which the satellite terminal 10 is located by the user of the satellite terminal 10, or detects the area movement based on the position information calculated using the positioning satellite and manages it. The user of the satellite terminal 10 may be prompted to input the update of the area, or the area movement may be detected according to the calculated position information and automatically updated. In any case, the satellite terminal 10a only has to manage whether the management area in which the satellite terminal 10a is located is the management area 60a or the management area 60b, and the update by the terminal management server 42 is not questioned.

  When the satellite terminal 10a moves from the management area 60a or the management area 60b to the unregistered management area 60c, the terminal ID is set as the satellite terminal 10c of the management area 60c as described in the fifth embodiment. Is updated by the terminal management server 42. When the satellite terminal 10c returns from the management area 10c to the previously registered management area 10a or management area 10b, the satellite terminal 10c operates as the satellite terminal 10a or satellite terminal 10b corresponding to the returned management area.

  As described above, in the sixth embodiment of the present invention, there is an effect of reducing the frequency of updating the terminal ID by pre-registering the management area of the expected stop. In an emergency, the satellite terminal uses the satellite communication line preassigned in accordance with the unique terminal ID in the management area, as in the second embodiment, so that the satellite communication line can be secured without congestion.

  In addition, by using the function to calculate the location information of the satellite terminal, the location frequency of the pre-registered registration area, the frequency of stopping at the stop-by area, or the registration frequency of the unregistered area is calculated and recorded and managed. It is also possible to prompt the user to change registration of the stop-by area or to additionally register an unregistered area.

  Note that the present invention is not limited to the above-described embodiments, and various modifications and changes can be made without departing from the spirit of the present invention.

  For example, a satellite terminal that communicates with a sensor that collects weather information, a sensor that collects river water level information, landslide information, earthquake information, volcanic activity information, and the like can be considered. The present invention is applied to line assignment of satellite communication lines in a system that regularly transmits information communicated by such satellite terminals using a satellite communication line or a system that temporarily lays and transmits the information. it can.

  In each embodiment of the present invention, a communication line is allocated using a uniquely assigned terminal ID. However, a user ID uniquely assigned to a terminal user is registered in the terminal. The position information of the terminal may be calculated from the positioning information of the positioning satellite, and the position information may be used. That is, any identification information that uniquely identifies the terminal may be used.

  In the fifth and sixth embodiments of the present invention, the line assignment method for the satellite communication line is used. However, the present invention is not limited to the line assignment method for the satellite communication line. For example, the present invention may be applied to the information collection system, wireless LAN system, and mobile communication system shown in the first embodiment. In other words, the terminal in each communication system is applied to pre-assignment of the line through which the terminal communicates using information uniquely managed (terminal number, user number, mobile phone number, MAC (Media Access Control) address, etc.) it can.

  The present invention can be used for line assignment of communication lines in a system for collecting information using communication lines.

1-1, 1-2, 1-n Information terminal 1a Communication means 1b Identification information storage means 2 Host device 10 Satellite terminal 10a, 10b, 10c Satellite terminal 11 Satellite terminal 20 Communication satellite 30 Tracking control station 40 Main control station 41 Terminal Management server 42 Safety confirmation information server 50 Satellite reception area 60 Management area (registration)
60a Management area (registration)
60b Management area (registration stop)
60c Management area (unregistered)
61 Management area (destination)
70 Management area (area subject to safety requests)
70a, 71a Satellite terminal 71 Management area (safety request non-target area)

Claims (10)

Identification information storage means for storing unique identification information in the management area ;
An information terminal comprising: a communication unit that uses a communication line preassigned by the identification information when the management area designation designates the management area where the device is located . The identification information is terminal identification information given to the information terminal, user identification information given to a user of the information terminal, or terminal location identification information indicating a location of the information terminal. The information terminal according to claim 1. The information terminal according to claim 1 or 2, wherein a communication line selected from the plurality of communication lines is preassigned according to the identification information. The identification information includes a first communication parameter for identifying each of the plurality of communication lines in the first communication method, and a second communication for identifying each of the plurality of communication lines in the second communication method. Including parameters,
4. The information terminal according to claim 3, wherein the plurality of communication lines are lines designated by a combination of the first communication parameter and the second communication parameter. The information terminal according to claim 4, wherein the first communication method and the second communication method include any one of CDMA, FDMA, and TDMA. Provided with location information acquisition means for acquiring location information,
Receiving the management area designated, when the location information obtaining means determines that located in the management area of the management area designated,
6. The information terminal according to claim 1, wherein a response is made using the communication line. The unique identification information in the management area is stored in the information terminal,
Pre-assign the communication line used by the information terminal by the identification information ,
The line allocation method according to claim 1 , wherein when the management area designation designates the management area where the information terminal is located, the information terminal uses the communication line preassigned by the identification information . Giving first identification information to the information terminal in a first management area;
The second identification information is reassigned to the information terminal in the second management area when the information terminal moves from the first management area to the second management area. 7. The line allocation method according to 7. A third identification number is assigned to the information terminal in a third management area;
When the information terminal moves from the third management area to the first management area, the first identification information is used.
9. The line assignment method according to claim 8, wherein the second identification information is reassigned when the information terminal moves from the third management area to the second management area. The information terminal acquires location information, detects the movement of the management area,
10. The line allocation method according to claim 8, wherein the identification information provided in the management area is used.

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