JP2011193417A - Portable communication terminal, mobile communication system and method of controlling portable communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the power consumption of a cellular type portable communication terminal. <P>SOLUTION: A portable communication terminal includes: a base station information change detector 105 for performing a cell search; a route information storage 103 for storing route information relating to a base station that covers cells on a specific route; and a controller 102 which controls the route information change detector 105 to perform the cell search on the basis of the route information. During a power saving mode, the route information stored in the storage is read and the cell search is performed on the basis of the read-out route information. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mobile communication terminal, and more particularly to a method for controlling a mobile communication terminal in a cellular mobile communication system.

  A mobile communication terminal (mobile station) used in a cellular mobile communication system searches for a connectable base station (initial search), or a plurality of base stations according to a change in a communication state with a communicating base station. Provided with a function (hereinafter referred to as a cell search function) for monitoring the reception power of a signal transmitted from the terminal (peripheral cell search). Such a cell search function is a function necessary for a mobile communication terminal to communicate with one of the base stations with a certain communication quality. However, the cell search execution frequency greatly affects the power consumption of the mobile communication terminal.

  As a conventional mobile communication system, a base station list is prepared for each specific route, and when a cell search is performed, a base station included in the base station list is selected as the next communication partner. In some cases, unnecessary switching of base stations is eliminated as much as possible (see, for example, Patent Document 1).

  Also, there is a portable information terminal that prevents the increase in power consumption by storing past history information, predicting a cell that will move next, and reducing the number of cell search targets (for example, patents) Reference 2).

Japanese Patent Laid-Open No. 2003-143637 JP 2004-289226 A

  The system described in Patent Document 1 can reduce the frequency of cell search somewhat. However, in this system, a new process is required such that the base station requests the base station to transmit the base station list, receives it, and collates the cell search result with the base station list. It becomes. Therefore, the system described in Patent Document 1 cannot be expected to have a great effect from the viewpoint of reducing power consumption.

  On the other hand, the portable information terminal described in Patent Document 2 can prevent an increase in power consumption by reducing the number of cell search targets. However, since the frequency of cell search is not reduced, the inventor has realized that there is room for further reduction in power consumption. Specifically, many users of mobile communication terminals use movement on a specific route, such as commuting and attending school, as a basic pattern of behavior, and mobile communication terminals have a high probability of being assigned to a specific base station. The inventor noticed that it was connected.

  The present invention is intended to reduce the frequency of cell search of a mobile communication terminal and to reduce the power consumption of the mobile communication terminal.

  A mobile communication terminal according to an aspect of the present invention includes a cell search means for performing a cell search, a storage means for storing route information relating to a base station covering a cell on a specific route, and a cell search means based on the route information. And a control means for controlling and realizing a power saving mode.

  According to another aspect of the present invention, there is provided a method for controlling a mobile communication terminal, the step of detecting a transition command to a power saving mode, the route from a storage unit that stores route information about a base station covering a cell on a specific route. Reading information, and performing a cell search based on the route information.

  According to the present invention, the cell search is performed based on the route information related to the base station covering the cell on the specific route, so that the cell search is performed only when necessary when the mobile communication terminal moves on the specific route. . Thereby, the frequency of cell search can be reduced and power consumption can be reduced.

  Specifically, when there is an out-of-communication area on a specific route and the mobile communication terminal is located in the out-of-communication area, execution of the base station search can be suppressed, thereby reducing power consumption. it can.

  In addition, when the mobile communication terminal is located in the communication area and handover is not required, execution of the base station search and neighboring base station monitoring can be suppressed, thereby reducing power consumption.

  Further, when the mobile communication terminal is located in the communication area and needs to be handed over, it is possible to limit the targets of the neighboring base station monitors, thereby reducing the power consumption.

It is a block diagram which shows the principal part schematic structure of the portable communication terminal which concerns on the 1st Embodiment of this invention. It is a figure which shows the relationship between the cell arrangement | positioning on the movement path | route used as the object of learning with a portable communication terminal, the elapsed time T, and the base station used as a connection destination. It is a figure which shows an example of the route information acquired by learning. It is a figure which shows the relationship between the cell arrangement | positioning on the specific path | route used as learning object, the adjusted elapsed time information t, and an operation mode. It is a figure which shows an example of the route information obtained by the adjustment process. 3 is a flowchart for explaining an operation in a power saving mode of the mobile communication terminal of FIG. 1. It is a block diagram which shows the principal part schematic structure of the portable communication terminal which concerns on the 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The present invention can be applied to a cellular mobile communication system such as a mobile phone system in which a service area is divided into a plurality of cells and a base station covering each cell is arranged in each cell.

  The present invention reduces the frequency of cell search and realizes power saving by performing cell search based on route information related to a base station covering a cell on a specific route stored in a storage unit. The route information related to the base station that covers the specific accounting cell is acquired by learning to collect the route information while actually moving the mobile communication terminal on the specific route. Details will be described below.

  FIG. 1 shows a schematic configuration of main parts of a mobile communication terminal according to the first embodiment of the present invention. As shown in FIG. 1, the mobile communication terminal 100 includes a receiving unit 101, a control unit 102, a route information storage unit 103, a timer unit 104, a base station information change detection unit 105, and a power saving function control interface 106. Yes. Although illustration and description of a transmission unit and the like that are not directly related to the present invention are omitted, the mobile communication terminal 100 is assumed to have a configuration for realizing a function normally required for the mobile communication terminal.

  The receiving unit 101 receives radio waves transmitted from surrounding base stations and performs reception processing such as demodulation. In this reception process, an initial cell search for searching for a base station as a connection destination, a peripheral cell search for monitoring received power of a signal transmitted from a peripheral base station, and synchronization with the base station as a connection destination are maintained. An intermittent cell search (hereinafter collectively referred to as a cell search) is included.

  The control unit 102 controls each unit and controls the operation of the entire mobile communication terminal 100. In particular, in the present embodiment, the control unit 102 performs path information generation (learning) control and cell search operation control based on path information during power saving mode operation.

  The route information storage unit 103 stores route information related to base stations that cover cells on a specific route. The route information will be described later.

  The timer unit 104 performs time measurement under the control of the control unit 102.

  Base station information change detection section 105 detects a change in base station information. The base station information is information notified from the control unit 102 to the receiving unit 101. The receiving unit 101 sets a reception signal processing target base station based on the base station information from the control unit 102. That is, the base station information represents a base station that is subject to cell search.

  When detecting a change in the base station information, the base station information change detection unit 105 notifies the control unit 102 to that effect.

  The power saving function control interface 106 includes a touch panel, input keys, and the like, and outputs a signal corresponding to a user's input operation. Output signals of the power saving function control interface 106 include a learning start command signal, a learning end command signal, a power saving mode transition command signal, and the like. Note that these signals may be generated by the control unit 102 that has detected an input operation to the power saving function control interface 106.

  As can be understood from the above description, the receiving unit 101 functions as cell search means for performing cell search. The control unit 102 functions as a control unit that controls the cell search unit. The route information storage unit 103 functions as a storage unit that stores route information. The power saving function control interface 106 functions as an input operation unit that outputs a learning start command and a learning end command in response to an input operation. The timer unit 104 serves as a time measuring unit that measures an elapsed time after receiving the learning start command. The control unit 102, together with the base station information change detection unit 105, generates route information generating means for generating, as route information, information identifying a base station that is a connection destination between the time when the learning start command is received and the time when the learning end command is received. Work as well.

  Next, the operation of the mobile communication terminal 100 of FIG. 1 will be described with reference to FIGS.

  First, the learning operation will be described. Here, assuming that there is a moving route (specific route) repeatedly used by the user, such as a commuting route or a school route, route information relating to a base station covering a cell on the specific route is generated.

  An example of the specific route 201 is shown on the upper side of FIG. The specific route 201 is a route that connects the first point S and the second point G. The first point S is, for example, the user's home, and the second point G is, for example, the user's office or It is a school. In FIG. 2, the specific route 201 is shown as a straight line, but the actual route is not necessarily a straight line and may include a straight part, a curved part, and a bent part. The specific route 201 may include not only general roads but also railways and highways.

  As illustrated, the specific path 201 passes through the cell A, the cell B, the cell C, and the cell D. Cells A-D represent areas where wireless communication services are provided by base stations A-D (not shown). When the mobile communication terminal 100 is located in each cell, the mobile communication terminal 100 can wirelessly communicate with a base station that covers the cell. In a region where two or more cells overlap, the mobile communication terminal 100 can perform wireless communication with a plurality of base stations covering those cells.

  A tunnel 202 exists on the specific route 201 in a region where the cell C and the cell D overlap. This tunnel is an example of an area (out-of-communication area) where the mobile communication terminal 100 cannot wirelessly communicate with any base station.

  Hereinafter, a case where the learning operation is executed when the user moves from the first point S toward the second point G will be described.

  First, when starting learning, the user performs an input operation on the power saving function control interface 106 to output a learning start command signal.

  The learning start command signal from the power saving function control interface 106 is output to related blocks, specifically, the control unit 102, the path information storage unit 103, the timer unit 104, and the base station information change detection unit 105. The learning start command signal may be output to each unit by the control unit 102 that has received notification from the power saving function control interface 106 that an input instructing learning start has been detected. In any case, when the user inputs a learning start instruction to the power saving function control interface 106, the mobile communication terminal 100 shifts to the learning mode.

  The receiving unit 101 and the control unit 102 perform the same cell search as in the normal mode even when the learning mode is entered. That is, the control unit 102 notifies the receiving unit 101 of base station information corresponding to the surrounding situation and the communication situation.

  When shifting to the learning mode, the base station information change detection unit 105 starts detecting the change in the base station information notified from the control unit 102 to the reception unit 101. In addition, the timer unit 104 starts measuring (counting) elapsed time.

  When shifting to the learning mode, the mobile communication terminal 100 is located at the first point S, and the base station to be connected is the base station A. The control unit 102 stores the base station information representing the base station A in the route information storage unit 103 as route information together with the elapsed time (T = 0).

  As the mobile communication terminal 100 leaves the first point S and proceeds toward the second point G, the received power of the signal from the base station A decreases. Thereby, the control unit 102 and the receiving unit 101 search for the next connection destination, and eventually select the base station B as the next connection destination. The base station information change detection unit 105 detects that the base station B has been added as a connection destination, and notifies the control unit 102 of it. The control unit 102 acquires elapsed time information indicating the elapsed time (T = T1) from the timer unit 104 in response to the notification from the base station information change detection unit 105, and the connection destinations are the base stations A and B. Is added to the route information stored in the route information storage 103.

  When the mobile communication terminal 100 further proceeds toward the second point G, the control unit deletes the base station A from the connection destination and sets only the base station B as the connection destination. Also at this time, the base station information change detection unit 105 detects that the base station A has been deleted from the connection destination, and notifies the control unit 102 of it. The control unit 102 acquires elapsed time information indicating the elapsed time (T = T2) from the timer unit 104 in response to the notification from the base station information change detection unit 105, and represents that the connection destination is the base station B. Together with the base station information, it is added to the route information stored in the route information storage 103.

  Thereafter, similarly, each time a base station as a communication destination is added or deleted, the route information stored in the route information storage unit 103 is updated. The same applies when the mobile communication terminal 100 enters the out-of-communication area or enters the in-communication area again.

  The lower side of FIG. 2 shows the relationship between the elapsed time T and the base station AD that is the connection destination. In the figure, the elapsed time T corresponds to the position on the specific route 201 shown on the upper side.

  Next, when the power saving function control interface 106 is operated and learning is instructed, the power saving function control interface 106 is sent to the control unit 102, the path information storage unit 103, the timer unit 104, and the base station information change detection unit 105. In response to this, a learning end command signal is output. The control unit 102 acquires elapsed time information from the timer unit 104 and adds it to the route information stored in the route information storage 103.

  As described above, the base station information and the corresponding elapsed time information are accumulated as learning results in the route information storage unit 103. The accumulated route information is shown in FIG.

  The path information shown in FIG. 3 can be used as it is for subsequent operation control in the power saving mode. However, it is preferable to perform the following post-processing in consideration of operational stability and the like.

  First, the control unit 102 reads the route information (learning result) stored in the route information storage unit 103. Then, as can be understood from FIG. 4, the elapsed time information T1 and T3 indicating the timing at which the base station as the connection destination is added is adjusted so as to advance the timing, and the adjusted time information ton1 and ton2 are changed. Generate. Further, the elapsed time information T2, T4 indicating the timing for deleting the base station from the connection destination is adjusted so as to delay the timing, and adjusted time information toff1, toff2 are generated. Further, while deleting the elapsed time information T5 indicating the timing of entering the out-of-communication area, the elapsed time information T6 indicating the timing of entering the communication-area again is a new one representing the timing that has been advanced and delayed. Time information ton3 and toff3 are generated.

  Such adjustment of the elapsed time information T1 to T6 is performed in consideration of a control time required for the handover, a difference in moving speed of the mobile communication terminal 100 when learning and using the learning result, and the like. In general, this adjustment is performed to shorten the duration of power saving mode 1 and extend the duration of power saving mode 2. The power saving mode 1 and the power saving mode 2 will be described later.

  FIG. 5 shows the relationship between the adjusted time information t (ton and toff) described above and the base station that is the connection destination. This represents a timing for starting a cell search (ton), a base station to be subjected to cell search (reception power monitoring), and a timing for ending cell search (toff).

  Next, the operation of the mobile communication terminal 100 in the power saving mode will be described with reference to FIG. 4 again.

  When the user of the mobile communication terminal 100 tries to move from the point S to the point G through the specific route 201, the user operates the power saving function control interface 106 to instruct to shift to the power saving mode.

  The instruction to shift to the power saving mode input from the power saving function control interface 106 is transmitted to the control unit 102. When receiving the instruction to shift to the power saving mode, the control unit 102 controls each unit of the mobile communication terminal 100 so as to operate in the power saving mode.

  Here, the power saving mode includes two modes, that is, a power saving mode 1 and a power saving mode 2. The power saving mode 1 is used when the mobile communication terminal 100 is located in the center of any cell (is in a state where it can communicate stably with any base station) and does not need to be handed over. On the other hand, the power saving mode 2 is used when the mobile communication terminal 100 is located in the periphery of one of the cells and needs to prepare for or perform handover. Note that when the mobile communication terminal 100 goes out of the communication range, the power saving mode 1 is used.

  In the power saving mode 1, the mobile communication terminal 100 does not perform cell search. That is, when the mobile communication terminal 100 is located in the communication area and does not require a handover, it is possible to suppress the neighboring base station monitoring and thereby reduce power consumption. Further, when the mobile communication terminal 100 is located in a non-communication area such as the tunnel 202 on the specific route 201, execution of the base station search can be suppressed, thereby reducing power consumption. Thereby, in the power saving mode 1, a significant reduction in power consumption can be realized. In the power saving mode 2, the mobile communication terminal 100 executes a cell search (received power monitor) for the base station indicated by the base station information. In this case, the power consumption can be reduced by limiting the cell search targets.

  When shifting to the power saving mode (t = 0), the timer unit 104 measures the elapsed time. The control unit 102 periodically acquires the elapsed time measured by the timer unit 104, and whether or not the time indicated by one of the time information ton and toff included in the base station information stored in the path information storage unit 103 has passed. To determine.

  The control unit 102 basically operates in the power saving mode 1 in the power saving mode. When the elapsed time passes the time indicated by the time information ton, the control unit 102 shifts to the power saving mode 2 and sets the time indicated by the corresponding time information toff. When the time has elapsed, the power saving mode 1 is restored.

  Referring to FIG. 4, the operation mode of the mobile communication terminal 100 shifts from the normal mode to the power saving mode 1 in response to an instruction to shift to the power saving mode (when t = 0). When the elapsed time exceeds ton1, the mode shifts to the power saving mode 2. When the elapsed time passes toff1, the mode returns to the power saving mode 1.

  As described above, the time information toff1 is determined to have a timing later than the elapsed time information T2, so that the timing of the time information ton1 is earlier than the elapsed time information T1. In other words, the duration of the power saving mode 1 is shortened and the duration of the power saving mode 2 is extended. This is because the cell search (monitoring operation) is not performed in the power saving mode 1, and in order to set the base station B as the connection destination at the timing of T1, it is necessary to search or monitor the base station B before that. Because there is. Also, the moving speed of the mobile communication terminal 100 is not necessarily the same as that during learning, so that the connection with the base station is not disconnected due to the difference in moving speed. The same applies to the time information ton2 and toff2.

  In the out-of-communication area (T5-T6), the power saving mode 1 is maintained so that unnecessary cell search is not performed. In the normal mode, the mobile communication terminal 100 frequently repeats cell search (base station search) in order to search for a communicable base station when entering the out-of-communication area. On the other hand, in the present embodiment, since such cell search is not performed, power consumption can be significantly reduced as compared with the normal operation mode.

  Next, it shifts to the power saving mode 2 at a timing (ton3) before the timing of leaving the out-of-communication area and starts a cell search. Also in this case, the cell search target is limited (here, to the base station D). For the time information ton3 and toff3, the time required for the cell search, the difference in moving speed, and the like are taken into consideration.

  When the base station as the next connection destination has not yet been found (for example, synchronization cannot be established) at the timing of the time information toff, the control unit 102 does not shift to the power saving mode 1 and does not shift to the normal mode. To migrate.

  The user of the mobile communication terminal 100 that has arrived at the point G operates the power saving function control interface 106 to instruct the transition to the normal mode (ton4). Thereby, the mobile communication terminal 100 shifts to the normal operation mode. Or, even if there is no operation by the user, if the mobile communication terminal 100 is located in the cell D at the timing of the time information ton4, it may be automatically shifted to the normal operation mode.

  FIG. 6 shows a flowchart of the operation of the mobile communication terminal 100 that has shifted to the power saving mode. As shown in the figure, the cell search operation is suppressed when the mode is shifted to the power saving mode (step S601). That is, the mode shifts to the power saving mode 1. And cell search (reception power monitor) is implemented by using time information toni (i = 1, 2,...) As a trigger (S602 to S606). That is, the mode shifts to the power saving mode 2. The cell search is temporarily terminated with time information toffi (i = 1, 2,...) As a trigger. That is, it returns to the power saving mode 1. Steps S603 to S607) are repeated until the connection destination base station indicated by the route information stored in the route information storage unit 103 becomes End.

  As described above, mobile communication terminal 100 according to the present embodiment can reduce power consumption required for cell search accompanying movement on specific route 201 that is repeatedly used.

  Specifically, when there is an out-of-service area such as the tunnel 202 on the specific route, the mobile communication terminal 100 effectively does not perform a cell search (base station search) in the out-of-service area, thereby reducing power consumption. Can do.

  Further, when the mobile communication terminal 100 is located at the center of any cell and handover is not required, cell search (base station monitoring) is not performed, thereby reducing power consumption.

  Furthermore, when the mobile communication terminal 100 is located in the periphery of any cell and needs to be handed over, the cell search (peripheral base station monitor) can be limited, thereby reducing power consumption. it can.

  In the above embodiment, an example is described in which learning is performed when moving from the point S to the point G, and the power saving mode is entered when moving from the point S to the point G. It is also possible to use the power saving mode when moving from the point G to the point S. In this case, when there is an instruction to shift to the power saving mode, it is possible to know the moving direction by determining which of the base stations A and D is the connection destination base station. Further, although the time information ton and toff cannot be used as they are, it is only necessary to obtain time information corresponding to movement in the reverse direction by calculation from these time information.

  Moreover, although the case where learning was performed only once was demonstrated in the said embodiment, learning may be performed in multiple times and you may make it acquire elapsed time information. In that case, the average value of the acquired values can be used as the elapsed time information.

  Furthermore, in the above-described embodiment, the case where the user of the mobile communication terminal shifts to the power saving mode by inputting the power saving function control interface 106 has been described. A wireless communication signal executed at the time of passing may be detected to shift to the power saving mode. By doing so, it is possible to save the user from performing an input operation.

  Next, a mobile communication terminal according to the second embodiment of the present invention will be described in detail with reference to FIG.

  The mobile communication terminal 700 of FIG. 7 is different from the mobile terminal device 100 of FIG. 1 in that a location information monitoring control unit 704 is provided instead of the timer unit 104.

  The position information monitoring control unit 704 functions as a position information acquisition unit that acquires or generates position information indicating the current position of the mobile communication terminal 700. The position information monitoring control unit 704 is, for example, a GPS (Global Positioning System) receiver, obtains the position of the mobile communication terminal 700 based on information from GPS satellites, and generates position information. The obtained position information is stored in the route information storage unit 103 as route information together with the base station information representing the connection destination base station, instead of the elapsed time information of the first embodiment.

  The position information acquired by the position information monitoring control unit 704 is used with reduced accuracy. For example, a radius of several tens to several hundreds of meters is regarded as the same point. The range regarded as the same point is determined in consideration of the control time required for the handover and the variation in the moving speed of the mobile communication terminal 100, as in the case where the elapsed time information is adjusted.

  The mobile communication terminal 700 according to the present embodiment is the mobile communication according to the first embodiment except that the position information indicating the position of the mobile communication terminal 700 is used instead of the elapsed time information according to the first embodiment. The operation is similar to the terminal 100 and the like. Since control is based on position rather than time, it can be operated in the power saving mode without being affected even if the movement speed of the mobile communication terminal 100 changes, for example, even if there is a train delay or traffic jam. It is.

  The mobile communication terminal 700 according to the present embodiment also has the same effects as the mobile communication terminal 100 according to the first embodiment.

  As mentioned above, although this invention was demonstrated according to some embodiment, this invention is not limited to the said embodiment, A various deformation | transformation or change is possible. For example, in the above embodiment, the example in which the power saving mode is controlled based on the elapsed time information or the position information has been described, but these may be combined. By controlling the position information monitoring control unit mainly when necessary based on the elapsed time information, highly accurate control is possible while suppressing power consumption. That is, since the mobile communication terminal is usually provided with a clock function that is always operating, there is almost no increase in power consumption even if the timer unit 104 is always operated. However, control based on elapsed time information is vulnerable to changes in travel time due to train delays, traffic jams, and the like. On the other hand, control based on position information is excellent in terms of accuracy, but if the position information monitoring control unit is always operated, power consumption is increased. As described above, highly accurate control is possible while suppressing power consumption.

  A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

  (Supplementary note 1) Cell search means for performing a cell search, storage means for storing route information regarding a base station covering a cell on a specific route, controlling the cell search means based on the route information, and setting a power saving mode And a control means for realizing the portable communication terminal.

  (Supplementary Note 2) An input operation means for outputting a learning start command and a learning end command in response to an input operation, and a base station that is a connection destination between receiving the learning start command and receiving the learning end command The mobile communication terminal according to appendix 1, further comprising: route information generating means for generating information to be specified as the route information.

  (Additional remark 3) It further has a time measuring means for measuring an elapsed time since receiving the learning start command, and the route information generating means includes the route information based on the elapsed time measured by the time measuring means. The mobile phone according to appendix 2, characterized in that it includes time information indicating an elapsed time from when a learning start command is received until each base station becomes a connection destination and when it is no longer a connection destination. Communication terminal.

  (Supplementary Note 4) The path information generation means shortens the first period when there is one base station as a connection destination, and extends the second period when there are two or more base stations as connection destinations. As described above, the elapsed time measured by the time measuring means is adjusted, and the adjusted elapsed time is included in the route information as the time information.

  (Additional remark 5) The position information acquisition means which acquires position information is further provided, and the path information generation means receives the learning start instruction in the path information based on the position information acquired by the position information acquisition means. 3. The mobile communication terminal according to appendix 2, wherein location information when each base station becomes a connection destination and when it is no longer a connection destination is included.

  (Supplementary note 6) Any one of Supplementary notes 1 to 5, wherein when the cell search is performed based on the route information, the control unit shifts to a normal mode if a base station to be connected is not found. The mobile communication terminal according to the above.

  (Additional remark 7) The mobile communication system characterized by including the portable communication terminal in any one of Additional remark 1 thru | or 6.

  (Additional remark 8) The step which detects the transfer instruction | command to power saving mode, The step which reads the said routing information from the memory | storage part which memorize | stores the routing information regarding the base station which covers the cell on a specific path | route, and a cell based on the said routing information A method for controlling a mobile communication terminal, comprising: performing a search.

  (Supplementary Note 9) A step of detecting a learning start instruction and a learning end instruction, a step of generating information specifying the base station that is a connection destination between the learning start instruction input and the learning end instruction input as the route information, And the step of storing the route information in the storage unit.

  (Supplementary Note 10) The method further includes a step of measuring an elapsed time since receiving the learning start command, and the step of generating the route information includes the learning start based on the measured elapsed time. The mobile communication terminal according to appendix 9, further comprising a step of including time information indicating an elapsed time from when the instruction is received until each base station becomes a connection destination and when it is no longer a connection destination. Control method.

  (Supplementary Note 11) The step of generating the route information shortens the first period when there is one base station as a connection destination, and the second period when there are two or more base stations as connection destinations. The mobile communication according to claim 10, further comprising a step of adjusting the elapsed time measured by the time measuring means so as to be extended, and including the adjusted elapsed time in the route information as the time information. Terminal control method.

  (Additional remark 12) The position information acquisition step which acquires position information is further included, The step which produces | generates the said route information is based on the acquired said position information, after receiving the said learning start instruction | indication in each said route information, The method of controlling a mobile communication terminal according to appendix 9, including a step of including position information when a station becomes a connection destination and when a station is no longer a connection destination.

  (Additional remark 13) The step of performing a cell search based on the said route information is stopped when the base station used as a connection destination is not found, The portable communication terminal of any one of Additional remark 8 thru | or 12 characterized by the above-mentioned Control method.

  (Additional remark 14) The step which detects the transfer instruction | command to power saving mode, the step which reads the said routing information from the memory | storage part which memorize | stores the routing information regarding the base station which covers the cell on a specific path | route, and a cell based on the said routing information A program for causing a computer to execute a step of performing a search.

  (Supplementary Note 15) A step of detecting a learning start command and a learning end command, a step of generating, as the route information, information identifying a base station that is a connection destination between the learning start command input and the learning end command input; The program according to appendix 14, further causing a computer to execute the step of storing the route information in the storage unit.

  (Supplementary Note 16) In addition to causing the computer to further execute a step of measuring an elapsed time since receiving the learning start command, and generating the route information, the route information is added to the route information based on the measured elapsed time. The program according to supplementary note 15, which causes a computer to execute a step of including time information indicating an elapsed time from when the learning start command is received until each base station becomes a connection destination and when it becomes a connection destination. .

  (Supplementary Note 17) In the step of generating the route information, the first period when there is one base station as a connection destination is shortened, and the second period when there are two or more base stations as connection destinations The program according to appendix 16, which causes the computer to execute a step of adjusting the elapsed time measured by the time measuring unit so as to be expanded, and including the adjusted elapsed time in the route information as the time information.

  (Supplementary Note 18) In addition to causing the computer to execute a position information acquisition step of acquiring position information, in the step of generating the route information, the learning information is received based on the acquired position information. The program according to supplementary note 15, which causes the computer to execute a step of including position information when each base station becomes a connection destination and when it is no longer a connection destination.

  (Additional remark 19) The program in any one of additional remark 7 thru | or 18 which makes a computer perform the step which stops the step which performs a cell search based on the said routing information when the base station used as a connection destination is not found.

DESCRIPTION OF SYMBOLS 100 Mobile communication terminal 101 Receiving part 102 Control part 103 Path | route information storage part 104 Timer part 105 Base station information change detection part 106 Power saving function control interface 201 Specific path | route 202 Tunnel 700 Portable communication terminal 704 Location information monitoring control part

Claims (10)

Cell search means for performing cell search;
Storage means for storing route information related to base stations covering cells on a specific route;
Control means for controlling the cell search means based on the path information and realizing a power saving mode;
A mobile communication terminal comprising: Input operation means for outputting a learning start command and a learning end command in response to an input operation;
Route information generating means for generating, as the route information, information specifying a base station that is a connection destination between receiving the learning start command and receiving the learning end command;
The mobile communication terminal according to claim 1, further comprising: It further comprises time measuring means for measuring the elapsed time since receiving the learning start command,
The route information generating means is based on the elapsed time measured by the time measuring means, and when each base station becomes a connection destination or no longer a connection destination after receiving the learning start command in the route information. Include time information that represents the elapsed time until
The mobile communication terminal according to claim 2. The path information generating means shortens the first period when there is one base station as a connection destination, and extends the second period when there are two or more base stations as connection destinations. The elapsed time measured by the time measuring means is adjusted, and the adjusted elapsed time is included in the route information as the time information.
The mobile communication terminal according to claim 3. It further comprises position information acquisition means for acquiring position information,
The route information generation means is based on the position information acquired by the position information acquisition means, and when each base station becomes a connection destination after receiving the learning start command in the route information and is no longer a connection destination. Include location information when
The mobile communication terminal according to claim 2.   6. The control unit according to claim 1, wherein when the cell search is performed based on the path information, if the base station that is the connection destination is not found, the control unit shifts to the normal mode. Mobile communication terminals.   A mobile communication system comprising the mobile communication terminal according to claim 1. Detecting a transition command to the power saving mode;
Reading the route information from a storage unit that stores route information about a base station that covers a cell on a specific route, and performing a cell search based on the route information;
A method for controlling a mobile communication terminal, comprising: Detecting a learning start command and a learning end command;
Generating information specifying the base station that is a connection destination between the learning start command input and the learning end command input as the route information; and storing the route information in the storage unit;
The method for controlling a mobile communication terminal according to claim 8, further comprising: Detecting a transition command to the power saving mode;
Reading the route information from a storage unit that stores route information about a base station that covers a cell on a specific route, and performing a cell search based on the route information;
A program that causes a computer to execute.

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