JP2007036429A - Data communication terminal and its control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data communication terminal and its control program capable of reducing power consumption of a plurality of data communication parts which perform wireless communication using the same communication method. <P>SOLUTION: A data communication terminal 10 comprises a plurality of data communication parts 11a and 11b for communication with a base station. It comprises a base band circuit control unit 12 which performs wireless communication with the base station using a given data communication part among a plurality of data communication parts 11a and 11b, based on a given condition. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a data communication terminal for performing wireless communication with a plurality of base stations, and a control program therefor.

Conventionally, as a data communication terminal that performs wireless communication with a base station, data is transmitted at a total communication speed of 32 (kbps) × 4 = 128 (kbps) using one data communication unit having four slots. A technique related to a terminal that transmits and receives data is known.
In addition, as a technique for controlling the power of the data communication terminal, a technique relating to a data communication terminal that stops data communication when the communication state with the base station is determined to be unstable (Patent Document 1), or a base station A technique related to a data communication terminal that controls transmission power in accordance with communication quality (Patent Document 2) is known.
Further, there is a technique (Patent Document 3) relating to a data communication terminal that includes a plurality of data communication units that perform wireless communication using different communication methods and switches between which data communication unit is used for communication according to a communication state. Are known.
Further, a data communication terminal (Patent Document 4) that switches a data communication unit to be used according to which base station to communicate with among a plurality of installed base stations is known.
JP 2000-49694 A JP 2002-271263 A JP 2003-224620 A JP 2002-271865 A

However, since the data communication terminals described in the above-described prior art, Patent Document 1, and Patent Document 2 perform wireless communication using one data communication unit, wireless communication using a plurality of data communication units. Communication was not possible.
In addition, in the data communication terminal described in Patent Literature 3, when performing wireless communication with a plurality of data communication units, wireless communication is performed using different communication methods, and therefore the same communication method is used. Wireless communication was not possible.
Further, in the data communication terminal described in Patent Document 4, since the data communication unit to be used is controlled according to the base station with which communication is performed, even if the data communication amount fluctuates, the power consumption The amount could not be reduced.

  The present invention has been made in view of the above circumstances, and an object thereof is a data communication terminal capable of reducing power consumption of a plurality of data communication units that perform wireless communication using the same communication method, and control thereof. To provide a program.

  The data communication terminal of the present invention is made to solve the above-described problem, and is a data communication terminal having a plurality of data communication means for performing wireless communication with the base station using the same communication method. And control means for performing wireless communication with the base station using predetermined data communication means of the plurality of data communication means based on predetermined conditions.

  The data communication terminal according to the present invention further includes a call signal determination means for determining whether a call signal used when establishing a link with the base station is a predetermined call signal. And the control means performs wireless communication with the base station using a predetermined data communication means of the plurality of data communication means according to a determination result of the call signal determination means. And

  Further, the data communication terminal of the present invention further comprises a connectable base station number detecting means for detecting the number of base stations capable of receiving a broadcast signal transmitted from a base station at a predetermined electric field strength or more, wherein the control means comprises: The wireless communication with the base station is performed using a predetermined data communication means of the plurality of data communication means according to the number of base stations detected by the connectable base station number detection means. .

  In addition, the data communication terminal of the present invention includes a maximum connectable link number detecting means for detecting a base station capable of receiving a broadcast signal transmitted from a base station at a predetermined electric field strength and detecting the number of connectable links. Further, the control means uses the predetermined data communication means among the plurality of data communication means according to the number of connectable links detected by the connectable maximum link number detection means. And performing wireless communication.

  In addition, the data communication terminal of the present invention further includes connection allowable maximum link number detection means for receiving information on the maximum allowable link number for the number of connectable links from the base station, and the control means includes the connection Performing wireless communication with the base station using a predetermined data communication means of the plurality of data communication means according to the information of the maximum allowable link number detected by the allowable maximum link number detection means. To do.

  In addition, the data communication terminal of the present invention further includes a data flow rate monitoring unit that monitors a data amount of data transmitted to and received from the base station, and the control unit is configured to monitor the data amount monitored by the data flow rate monitoring unit. When the value exceeds a predetermined value, the plurality of data communication means that are not used for wireless communication are driven to perform wireless communication with the base station.

  The data communication terminal according to the present invention further includes connection monitoring means for monitoring a data amount of data transmitted / received to / from the base station, and the control means has a predetermined amount of data monitored by the connection monitoring means. When the value is smaller than the value, driving of the data communication means that is no longer used for wireless communication is stopped, and wireless communication with the base station is performed.

  The data communication terminal control program of the present invention is a control program for a data communication terminal having a plurality of data communication means for performing wireless communication with the base station using the same communication method. Based on the condition, the computer is caused to execute a first step of performing wireless communication with the base station using a predetermined data communication unit of the plurality of data communication units.

  The control program for a data communication terminal according to the present invention includes a second step of determining whether or not a call signal used when establishing a link with the base station is a predetermined call signal. Further, the first step performs wireless communication with the base station using a predetermined data communication unit among the plurality of data communication units according to the determination result in the second step. It is characterized by making it.

  The control program for a data communication terminal according to the present invention further includes a second step of detecting the number of base stations capable of receiving a broadcast signal transmitted from a base station at a predetermined electric field strength or higher. In the step, wireless communication with the base station is performed using a predetermined data communication unit among the plurality of data communication units according to the number of receivable base stations detected in the second step. It is characterized by that.

  In addition, the control program for a data communication terminal of the present invention detects the number of base stations that can receive a broadcast signal transmitted from a base station at a predetermined electric field strength or more, and detects the number of connectable links. The first step uses the predetermined data communication means in the plurality of data communication means according to the number of connectable links detected in the second step. It is characterized by performing wireless communication with a base station.

  In addition, the control program for a data communication terminal of the present invention further includes a second step of receiving, from the base station, information on a maximum allowable number of links for the number of connectable links, and the first step includes: Radio communication with the base station is performed using predetermined data communication means of the plurality of data communication means according to the information on the maximum allowable connection number of links detected by the maximum allowable connection number detecting means. It is characterized by.

  The control program for a data communication terminal according to the present invention further includes a second step of monitoring a data amount of data transmitted / received to / from the base station, wherein the first step includes the data flow rate monitoring means. When the amount of data to be monitored exceeds a predetermined value, the plurality of data communication means that are not used for wireless communication are activated to perform wireless communication with the base station.

  The control program for a data communication terminal of the present invention further includes a second step for monitoring the data amount of data transmitted / received to / from the base station, and the first step is performed by the connection monitoring means. When the amount of data to be monitored becomes smaller than a predetermined value, driving of the data communication means that is no longer used for wireless communication is stopped, and wireless communication with the base station is performed.

In the present invention, among the plurality of data communication means, the data communication means used for wireless communication is determined based on a predetermined condition.
Thereby, since it is not necessary to drive about the data communication means used for radio | wireless communication, the electric power which a data communication terminal consumes can be reduced.

Hereinafter, a data communication terminal according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a data communication terminal 10 according to the present embodiment. The data communication terminal 10 includes a data communication unit 11 (11a, 11b), a baseband circuit control unit 12, a CPU (Central Processing Unit) · 13, a storage unit 14, and an interface unit 15. Here, although the case where two data communication units 11 are provided will be described, three or more data communication units 11 may be provided in the data communication terminal 10.
In the present embodiment, a case where the data communication terminal 10 is a PHS (Personal Handyphone System) terminal will be described. The data communication terminal 10 performs wireless communication with a plurality of base stations arranged in the vicinity.

The data communication units 11a and 11b have a baseband circuit unit 16 (16a and 16b), a frequency conversion unit 17 (17a and 17b), and an antenna unit 18 (18a and 18b), respectively, and use the same communication method. Wireless communication is performed with the base station.
The baseband circuit units 16a and 16b each have four slots for performing wireless communication with the base station. In one slot, 32 (kbps (kilobits per second)) wireless communication can be performed with the base station. Therefore, the baseband circuit units 16a and 16b can perform wireless communication at a communication speed of 128 (kbps) using a total of four slots. Further, one data communication terminal 10 can perform wireless communication at a communication speed of 256 (kbps) by a total of two baseband circuit units 16a and 16b. The baseband circuit units 16a and 16b perform processing such as modulation on the signal output from the baseband circuit control unit 12 and output the result to the frequency conversion units 17a and 17b, or output from the frequency conversion units 17a and 17b. The signal is subjected to processing such as demodulation and output to the baseband circuit control unit 12.

The frequency conversion units 17a and 17b convert the frequency of the signal output from the baseband circuit units 16a and 16b into a transmission frequency and output the signal to the antenna units 18a and 18b, or the signals received by the antenna units 18a and 18b. Then, frequency conversion processing is performed and output to the baseband circuit units 16a and 16b.
The antenna units 18a and 18b transmit the signals output from the frequency conversion units 17a and 17b on the radio wave to the base station, receive the radio waves transmitted from the base station, and transmit the signals corresponding to the radio waves to the frequency. Or output to the conversion units 17a and 17b.

The baseband circuit control unit 12 performs wireless communication with the base station by driving one or both of the data communication unit 11a and the data communication unit 11b based on the control of the CPU 13. The CPU 13 controls the baseband circuit units 16a and 16b, the storage unit 14, the interface unit 15, and the like.
The storage unit 14 stores data transmitted from the data communication terminal 10 and stores data received by the data communication terminal 10. The storage unit 14 stores a program executed by the CPU 13. The interface unit 15 outputs a signal output from the CPU 13 to an external PC (Personal Computer) or the like, or outputs a signal output from the PC or the like to the CPU 13.

Next, a data communication terminal according to the first embodiment of the present invention will be described. The configuration of the data communication terminal 10a according to the present embodiment is almost the same as the configuration of the data communication terminal 10 (see FIG. 1). However, as shown in FIG. A selection unit 21 is included. In FIG. 2, illustration of the CPU 13, the storage unit 14, and the interface unit 15 is omitted.
The calling signal determination unit 20 analyzes a calling signal input from the interface unit 15 to the data communication terminal 10a when performing wireless communication. Then, when communicating with the base station, it is determined whether to use one of the data communication units 11a and 11b or both. Here, a case where a telephone number is used as a call signal will be described.
The selection unit 21 performs wireless communication with the base station by activating one or both of the data communication units 11a and 11b based on the signal output from the call signal determination unit 20.

Next, processing of the data communication terminal 10a according to the present embodiment will be described.
FIG. 3 is a flowchart showing a processing flow of the data communication terminal 10a according to the present embodiment. First, the data communication terminal 10a is activated (step S101), and one of the plurality of data communication units 11 is activated (step S102). Although the case where the data communication unit 11a is activated will be described here, the data communication unit 11b may be activated.
And it waits until the calling signal used for the start of radio | wireless communication is input from PC via the interface part 15 (step S103). When a call signal is input, a call is made to the base station that is the connection destination (step S104).

  The calling signal determination unit 20 determines how many slots are permitted to perform wireless communication when a call is made with the calling number (step S105). Here, it is determined whether the call signal is permitted to perform wireless communication using five or more slots, that is, whether or not a connection of five or more links is permitted. If connection of 5 links or more is not permitted, “No” is determined in step S105, and the process proceeds to step S107. On the other hand, if connection of 5 links or more is permitted, “Yes” is determined in step S105, and the data communication unit 11b is activated (step S106).

  For example, when the call signal is a call number of 070570611 ### 61 used for 32 (kbps) wireless communication, or a call number of 057075711 # 64 used for 128 (kbps) wireless communication. In some cases, wireless communication can be performed simply by activating one data communication unit 11, and therefore either one of the data communication units 11a or 11b is driven. In addition, when the calling number is a calling number of 070570881 ## 68 used for 256 (kbps) wireless communication, wireless communication cannot be sufficiently performed only by starting one data communication unit 11. Therefore, both data communication units 11a and 11b are activated.

Next, the slot and the connection destination base station are connected by the number of links permitted to be connected (step S107), and wireless communication is performed between the data communication terminal 10a and the base station (step S108). When the wireless communication is completed between the data communication terminal 10a and the base station, the link connected between the slot and the base station is disconnected (step S109). And it is determined whether the data communication part 11b is starting (step S110). If the data communication unit 11b is not activated, “No” is determined in step S110, and the process proceeds to step S103. On the other hand, if the data communication unit 11b is active, it is determined as “Yes” in step S110, the data communication unit 11b is stopped (step S111), and the process proceeds to step S103.
In the embodiment described above, the data communication unit 11 to be activated is controlled according to the type of the call signal. Thereby, since it is not necessary to supply electric power to the data communication part 11 which is not used for radio | wireless communication, the power consumption of the data communication terminal 10a can be reduced.

Next, a data communication terminal according to the second embodiment of the present invention will be described. The configuration of the data communication terminal 10b according to the present embodiment is almost the same as the configuration of the data communication terminal 10 (see FIG. 1). However, as shown in FIG. 22 and a selection unit 23. In FIG. 4, illustration of the CPU 13, the storage unit 14, and the interface unit 15 is omitted.
The connectable base station number detection unit 22 performs an open search process for determining whether or not a broadcast signal having a predetermined electric field strength or higher can be received from base stations installed around the data communication terminal 10b for a certain period of time. By doing this, the number of base stations with which the data communication terminal 10b can perform wireless communication is specified.
The selection unit 23 performs wireless communication with the base station by activating one or both of the data communication units 11 a and 11 b based on the signal output from the connectable base station number detection unit 22.

Next, processing of the data communication terminal 10b according to the present embodiment will be described.
FIG. 5 is a flowchart showing a processing flow of the data communication terminal 10b according to the present embodiment. First, the data communication terminal 10b is activated (step S201), and any one of the plurality of data communication units 11 is activated (step S202). Although the case where the data communication unit 11a is activated will be described here, the data communication unit 11b may be activated.
And it waits until the calling signal used for the start of radio | wireless communication is input from PC via the interface part 15 (step S203). When a call signal is input, a call is made to the base station that is the connection destination (step S204).

  The connectable base station number detection unit 22 searches for a base station with which the data communication terminal 10b can perform wireless communication by performing an open search (step S205), and wirelessly uses a number of slots. It is determined whether or not communication is permitted (step S206). Here, it is determined whether or not a broadcast signal has been received from five or more base stations capable of wireless communication by open search. If connection with five or more base stations is not possible, “No” is determined in step S206, and the process proceeds to step S208. On the other hand, if it is possible to connect to five or more base stations, “Yes” is determined in step S206, and the data communication unit 11b is activated (step S207).

  Next, the slot and the connection destination base station are connected by the number of links that can be connected to the determined base station (step S208), and wireless communication is performed between the data communication terminal 10b and the base station. This is performed (step S209). When the wireless communication is completed between the data communication terminal 10b and the base station, the link connected between the slot and the base station is disconnected (step S210). Then, it is determined whether or not the data communication unit 11b is being activated (step S211). If the data communication unit 11b is not activated, “No” is determined in step S211 and the process proceeds to step S203. On the other hand, if the data communication unit 11b is being activated, “Yes” is determined in step S211, the data communication unit 11b is stopped (step S212), and the process proceeds to step S203.

  In the embodiment described above, the number of connectable base stations detecting unit 22 performs an open search to detect the number of base stations with which the data communication terminal 10b can perform wireless communication, and the number of base stations is equal to or less than a predetermined number. In some cases, wireless communication is performed using one data communication unit, and when larger than a predetermined number, wireless communication is performed using a plurality of data communication units. Thereby, since it is possible not to supply power to the data communication unit 11 that is not used for wireless communication, it is possible to reduce the power consumption of the data communication terminal 10b.

Next, a data communication terminal according to the third embodiment of the present invention will be described. The configuration of the data communication terminal 10c according to the present embodiment is substantially the same as the configuration of the data communication terminal 10 (see FIG. 1). However, as shown in FIG. A link number detection unit 32 is included. In FIG. 6, the CPU 13, the storage unit 14, and the interface unit 15 are not shown.
The maximum connectable link number detection unit 32 performs an open search process for determining whether or not a broadcast signal having a predetermined electric field strength or higher can be received from base stations installed around the data communication terminal 10c for a certain period of time. Thus, the data communication terminal 10c identifies one or a plurality of base stations that can perform wireless communication, and detects the maximum number of links that can be connected to the identified base station.
The selection unit 31 performs wireless communication with the base station by activating either or both of the data communication units 11a and 11b based on the signal output from the connectable maximum link number detection unit 32.

Next, processing of the data communication terminal 10c according to the present embodiment will be described.
FIG. 7 is a flowchart showing a processing flow of the data communication terminal 10c according to the present embodiment. In addition, about the part which overlaps with FIG. 5, description here is abbreviate | omitted.
The connectable maximum link number detection unit 32 searches for a base station with which the data communication terminal 10c can perform wireless communication by performing an open search (step S305), and wirelessly uses a number of slots. It is determined whether or not communication is permitted (step S306). Here, by open search, it is determined whether or not a wireless communication-capable base station that has received the broadcast signal can be connected to five or more links. If connection of 5 links or more is not possible, “No” is determined in step S306, and the process proceeds to step S308. On the other hand, if connection of 5 links or more is possible, it is determined as “Yes” in step S306, and the data communication unit 11b is activated (step S307).
Next, the slot and the connection destination base station are connected by the number of links that can be connected (step S308), and wireless communication is performed between the data communication terminal 10c and the base station (step S309).

  In the embodiment described above, by performing an open search by the connectable maximum link number detection unit 32, the data communication terminal 10c detects one or a plurality of base stations capable of wireless communication, and the maximum number of links with the base station. Is equal to or less than the predetermined number, wireless communication is performed using one data communication unit, and when the number is larger than the predetermined number, wireless communication is performed using a plurality of data communication units. Thereby, since it is possible not to supply power to the data communication unit 11 that is not used for wireless communication, it is possible to reduce the power consumption of the data communication terminal 10c.

Next, a data communication terminal according to the fourth embodiment of the present invention will be described. The configuration of the data communication terminal 10d according to the present embodiment is almost the same as the configuration of the data communication terminal 10 (see FIG. 1). However, as shown in FIG. 24 and a selection unit 25. In FIG. 8, the CPU 13, the storage unit 14, and the interface unit 15 are not shown.
The connection allowable maximum link number detection unit 24 detects information on the maximum connection allowable link number regarding how many links are allowed to be connected to the base station when the data communication terminal 10d performs wireless communication. The selection unit 25 performs wireless communication with the base station by activating one or both of the data communication units 11a and 11b based on a signal output from the connection allowable maximum link number detection unit 24. .

FIG. 9 is a sequence diagram showing a flow of processing for performing link connection between the data communication terminal 10d and the base stations 1a and 1b. A plurality of base stations 1a are installed around the data communication terminal 10d. The base station 1b is a base station for managing a plurality of base stations 1a. Signals such as “BIND”, “authentication request”, “authentication response”, and “+ RSP” are exchanged between the data communication terminal 10d and the base stations 1a and 1b.
The data communication terminal 10d transmits a “BIND” signal to the base station 1b via the base station 1a. This BIND signal includes identification information for identifying the data communication terminal 10d. On the other hand, a “+ RSP” signal is transmitted from the base station 1b to the data communication terminal 10d. This + RSP signal includes information on the maximum allowable number of links for how many links are allowed to be connected when the data communication terminal 10d performs wireless communication.

Next, processing of the data communication terminal 10d according to the present embodiment will be described.
FIG. 10 is a flowchart showing a processing flow of the data communication terminal 10d according to the present embodiment. First, the data communication terminal 10d is activated (step S401), and one of the plurality of data communication units 11 is activated (step S402). Although the case where the data communication unit 11a is activated will be described here, the data communication unit 11b may be activated.
And it waits until the call signal used for the start of radio | wireless communication is input from PC via the interface part 15 (step S403). When a call signal is input, a call is made to the base station that is the connection destination (step S404).

Next, the data communication terminal 10d performs a link establishment process for performing wireless communication with the base station (step S405). The data communication terminal 10d transmits a BIND signal to the base station (step S406). In response to this BIND signal, a + RSP signal is transmitted from the base station, and the data communication terminal 10d receives this + RSP signal (step S407).
The connection allowable maximum link number detection unit 24 detects information on the connection allowable maximum link number based on the + RSP signal, and determines whether or not the connection allowable maximum link number is 5 or more (step S408). When the connection allowable maximum number of links is smaller than 5, “No” is determined in step S408, and the process proceeds to step S410. On the other hand, if the maximum allowable number of links is 5 or more, “Yes” is determined in step S408, and the data communication unit 11b is activated (step S409).

  Then, wireless communication is performed between the data communication terminal 10d and the base station (step S410). When the wireless communication is completed between the data communication terminal 10d and the base station, the link connected between the slot and the base station is disconnected (step S411). Then, it is determined whether or not the data communication unit 11b is being activated (step S412). If the data communication unit 11b is not activated, “No” is determined in step S412, and the process proceeds to step S403. On the other hand, if the data communication unit 11b is activated, “Yes” is determined in step S412, the data communication unit 11b is stopped (step S413), and the process proceeds to step S403.

  In the above-described embodiment, the connection allowable maximum link number detection unit 24 acquires information on the maximum connection allowable link number that the data communication terminal 10d can connect to the base station, and based on the information, It is determined whether to perform wireless communication using a data communication unit or to perform wireless communication using a plurality of data communication units. Thereby, since it is possible not to supply power to the data communication unit 11 that is not used for wireless communication, it is possible to reduce the power consumption of the data communication terminal 10d.

Next, a data communication terminal according to the fifth embodiment of the present invention is described. The configuration of the data communication terminal 10e according to the present embodiment is substantially the same as the configuration of the data communication terminal 10 (see FIG. 1), but the baseband circuit control unit 12 includes a data flow rate monitoring unit 26 and an extension as shown in FIG. It has an opportunity determination unit 27 and a selection unit 28. In FIG. 11, the CPU 13, the storage unit 14, and the interface unit 15 are not shown.
The data flow rate monitoring unit 26 monitors the amount of data transmitted and received between the data communication terminal 10e and the base station. The expansion opportunity determination unit 27 determines whether or not the amount of data monitored by the data flow rate monitoring unit 26 exceeds a predetermined threshold value. The selection unit 28 performs wireless communication with the base station by activating one or both of the data communication units 11 a and 11 b based on the signal output from the expansion opportunity determination unit 27.

Next, processing of the data communication terminal 10e according to the present embodiment will be described.
FIG. 12 is a flowchart showing a processing flow of the data communication terminal 10e according to the present embodiment. First, the data communication terminal 10e is activated (step S501), and any one of the plurality of data communication units 11 is activated (step S502). Although the case where the data communication unit 11a is activated will be described here, the data communication unit 11b may be activated.
And it waits until the calling signal used for the start of radio | wireless communication is input from PC via the interface part 15 (step S503). When a call signal is input, a call is made to the connection destination base station (step S504), and a link is established between the slot of the data communication terminal 10e and the base station (step S505). . Then, wireless communication is performed between the data communication terminal 10e and the base station (step S506).

  The data flow rate monitoring unit 26 monitors the amount of data transmitted / received between the data communication terminal 10e and the base station. When the amount of data monitored by the data flow rate monitoring unit 26 has increased (step S507), the expansion opportunity determination unit 27 needs to connect five or more links in order to transmit / receive the data amount. It is determined whether the amount of data is greater than 128 (kpbs) (step S508). If connection of 5 links or more is not necessary, “No” is determined in step S508, and the process proceeds to step S510. On the other hand, if connection of 5 links or more is necessary, “Yes” is determined in step S508, and the data communication unit 11b is activated (step S509).

  Next, the slot of the data communication terminal 10e and the number of links of the base station are increased (step S510). When the wireless communication is completed between the data communication terminal 10e and the base station, the link connected between the slot and the base station is disconnected (step S511). Then, it is determined whether or not the data communication unit 11b is being activated (step S512). If the data communication unit 11b is not activated, “No” is determined in step S512, and the process proceeds to step S503. On the other hand, if the data communication unit 11b is being activated, “Yes” is determined in step S512, the data communication unit 11b is stopped (step S513), and the process proceeds to step S503.

  In the above-described embodiment, the data flow rate monitoring unit 26 monitors the data amount of data transmitted and received between the data communication terminal 10e and the base station, and the expansion opportunity determination unit 27 determines whether the data amount exceeds a predetermined amount. If the predetermined amount is exceeded, the data communication unit 11 is newly driven. Thereby, since it is possible not to supply power to the data communication unit 11 that is not used for wireless communication, it is possible to reduce the power consumption of the data communication terminal 10e.

Next, a data communication terminal according to the sixth embodiment of the present invention is described. The configuration of the data communication terminal 10f according to the present embodiment is almost the same as the configuration of the data communication terminal 10 (see FIG. 1), but the baseband circuit control unit 12 includes a connection monitoring unit 29, a selection unit as shown in FIG. 30. In FIG. 13, the CPU · 13, the storage unit 14, and the interface unit 15 are not shown.
The connection monitoring unit 29 monitors the amount of data transmitted and received between the data communication terminal 10d and the base station. The selection unit 30 performs wireless communication with the base station by activating one or both of the data communication units 11a and 11b based on the signal output from the connection monitoring unit 29.

Next, processing of the data communication terminal 10f according to the present embodiment will be described.
14 and 15 are flowcharts showing a processing flow of the data communication terminal 10f according to the present embodiment. First, the data communication terminal 10f is activated (step S601), and any one of the plurality of data communication units 11 is activated (step S602). Although the case where the data communication unit 11a is activated will be described here, the data communication unit 11b may be activated.
And it waits until the calling signal used for the start of radio | wireless communication is input from PC via the interface part 15 (step S603). When a call signal is input, a call is made to the connection destination base station (step S604), and a link is established between the slot of the data communication terminal 10f and the base station (step S605). . Then, wireless communication is performed between the data communication terminal 10f and the base station (step S606).

  The connection monitoring unit 29 monitors data transmitted and received between the data communication terminal 10f and the base station, and determines whether or not the amount of data has increased (step S607). If the data amount has not increased, “No” is determined in step S607, and the process proceeds to step S611. The process of step S611 will be described later. On the other hand, if the data amount has increased, “Yes” is determined in step S607. Then, the connection monitoring unit 29 determines whether connection of 5 links or more is necessary to transmit / receive the data amount, that is, whether the data amount is greater than 128 (kpbs) (step S608). If connection of 5 links or more is not necessary, “No” is determined in step S608, and the process proceeds to step S610. On the other hand, if connection of 5 links or more is necessary, “Yes” is determined in step S608, and the data communication unit 11b is activated (step S609). Then, the slot of the data communication terminal 10f and the number of links of the base station are increased, and wireless communication is performed (step S610). Then, the process proceeds to step S606.

The connection monitoring unit 29 monitors data transmitted and received between the data communication terminal 10f and the base station, and determines whether or not the data amount has decreased (step S611). If the data amount has not decreased, “No” is determined in step S611, and the process proceeds to step S606. On the other hand, if the amount of data has decreased, it is determined as “Yes” in step S611, the slot of the data communication terminal 10f and the number of links of the base station are decreased, and wireless communication is performed (step S612 in FIG. 15). ). Then, it is determined whether or not the number of links between the slot of the data communication unit 11b and the base station is 0 (step S613). If the number of links is not 0, “No” is determined in step S613, and the process proceeds to step S615. On the other hand, if the number of links is 0, “Yes” is determined in step S613, and the driving of the data communication unit 11b is stopped (step S614).
Then, it is determined whether or not the number of links between the slot of the data communication unit 11a and the base station is 0 (step S615). If the number of links is not 0, “No” is determined in step S615, and the process proceeds to step S606 in FIG. On the other hand, if the number of links is 0, “Yes” is determined in step S615, and the driving of the data communication unit 11a is stopped (step S616 in FIG. 15). The process proceeds to step S606 in FIG.

  In the above-described embodiment, the connection monitoring unit 29 monitors the data amount of data transmitted and received between the data communication terminal 10f and the base station, and when the data amount becomes smaller than a predetermined amount, the data communication unit 11 The drive was stopped. Thereby, since it is possible not to supply power to the data communication unit 11 that is not used for wireless communication, it is possible to reduce the power consumption of the data communication terminal 10f.

  In the embodiment described above, the baseband circuit control unit 12 in FIG. 1, the call signal determination unit 20 in FIG. 2, the selection unit 21, the connectable base station number detection unit 22 in FIG. 4, and the selection unit in FIG. 31, the maximum connectable link number detection unit 32, the connection allowable maximum link number detection unit 24 in FIG. 8, the selection unit 25, the data flow rate monitoring unit 26 in FIG. The data communication terminal 10 (10a to 10f) may be controlled by recording a program for recording on a computer-readable recording medium, causing the computer system to read and execute the program recorded on the recording medium. Good. The “computer system” here includes an OS and hardware such as peripheral devices.

  The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” dynamically holds a program for a short time, like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, it is also assumed that a server that holds a program for a certain time, such as a volatile memory inside a computer system that serves as a server or client. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

It is a block diagram which shows the structure of the data communication terminal 10 by embodiment of this invention. It is a block diagram which shows the structure of the data communication terminal 10a by the 1st Embodiment of this invention. It is a flowchart which shows the flow of a process of the data communication terminal 10a by this embodiment. It is a block diagram which shows the structure of the data communication terminal 10b by the 2nd Embodiment of this invention. It is a flowchart which shows the flow of a process of the data communication terminal 10b by this embodiment. It is a block diagram which shows the structure of the data communication terminal 10c by the 3rd Embodiment of this invention. It is a flowchart which shows the flow of a process of the data communication terminal 10c by this embodiment. It is a block diagram which shows the structure of the data communication terminal 10d by the 4th Embodiment of this invention. It is the sequence diagram which showed the flow of the process for performing link connection between the data communication terminal 10d and base station 1a, 1b. It is a flowchart which shows the flow of a process of the data communication terminal 10d by this embodiment. It is a block diagram which shows the structure of the data communication terminal 10e by the 5th Embodiment of this invention. It is a flowchart which shows the flow of a process of the data communication terminal 10e by this embodiment. It is a block diagram which shows the structure of the data communication terminal 10f by the 6th Embodiment of this invention. It is a flowchart which shows the flow of a process of the data communication terminal 10f by this embodiment. It is a flowchart which shows the flow of a process of the data communication terminal 10f by this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b ... Base station, 10 (10a-10f) ... Data communication terminal, 11 (11a, 11b) ... Data communication part, 12 ... Baseband circuit control part, 13 ... CPU , 14 ... storage unit, 15 ... interface unit, 16 (16a, 16b) ... baseband circuit unit, 17 (17a, 17b) ... frequency conversion unit, 18 (18a, 18b) ...・ Antenna unit, 20 ... outgoing call signal determination unit, 21 ... selection unit, 22 ... connectable base station number detection unit, 23 ... selection unit, 24 ... connection allowable maximum link number detection , 25... Selection section, 26... Data flow rate monitoring section, 27... Expansion opportunity determination section, 28... Selection section, 29 .. connection monitoring section, 30. ... Selection unit, 32 ... Maximum connectable link number detection unit

Claims (14)

A data communication terminal having a plurality of data communication means for performing wireless communication using the same communication method with a base station,
A data communication terminal comprising control means for performing wireless communication with the base station using a predetermined data communication means of the plurality of data communication means based on a predetermined condition. A call signal determining means for determining whether or not a call signal used when establishing a link to the base station is a predetermined call signal;
The control means performs wireless communication with the base station using a predetermined data communication means of the plurality of data communication means according to a determination result of the call signal determination means. Item 4. A data communication terminal according to Item 1. Further comprising connectable base station number detecting means for detecting the number of base stations capable of receiving a broadcast signal transmitted from the base station at a predetermined electric field strength or higher,
The control means performs wireless communication with the base station using a predetermined data communication means of the plurality of data communication means according to the number of base stations detected by the connectable base station number detection means. The data communication terminal according to claim 1. Further comprising a connectable maximum link number detecting means for detecting a base station capable of receiving a broadcast signal transmitted from a base station at a predetermined electric field strength or more and detecting the number of connectable links;
The control means performs wireless communication with the base station using a predetermined data communication means among the plurality of data communication means according to the number of connectable links detected by the maximum connectable link number detection means. The data communication terminal according to claim 1, wherein the data communication terminal is performed. A connection allowable maximum link number detecting means for receiving, from the base station, information on the maximum allowable link number for the connectable link number;
The control means wirelessly communicates with the base station using a predetermined data communication means in the plurality of data communication means according to information on the maximum allowable connection link number detected by the maximum allowable connection number detection means. The data communication terminal according to claim 1, wherein communication is performed. Further comprising data flow rate monitoring means for monitoring the data amount of data transmitted to and received from the base station;
The control means drives the plurality of data communication means not used for wireless communication when the amount of data monitored by the data flow rate monitoring means exceeds a predetermined value, and performs wireless communication with the base station. The data communication terminal according to claim 1, wherein the data communication terminal is performed. Connection monitoring means for monitoring the amount of data transmitted to and received from the base station;
When the amount of data monitored by the connection monitoring unit becomes smaller than a predetermined value, the control unit stops driving the data communication unit that is no longer used for wireless communication, and performs wireless communication with the base station. The data communication terminal according to claim 1, wherein the data communication terminal is performed. A control program for a data communication terminal having a plurality of data communication means for performing wireless communication using the same communication method with a base station,
Control of a data communication terminal for causing a computer to execute a first step of performing wireless communication with the base station using predetermined data communication means of the plurality of data communication means based on a predetermined condition program. A second step of causing the base station to determine whether or not a call signal used when establishing a link is a predetermined call signal;
In the first step, wireless communication with the base station is performed using a predetermined data communication unit of the plurality of data communication units according to the determination result in the second step. A control program for a data communication terminal according to claim 8. A second step of detecting the number of base stations that can receive the broadcast signal transmitted from the base station at a predetermined electric field strength or higher;
The first step uses a predetermined data communication means among the plurality of data communication means according to the number of receivable base stations detected in the second step and wirelessly communicates with the base station. 9. The data communication terminal control program according to claim 8, wherein communication is performed. A second step of detecting the number of base stations capable of receiving a broadcast signal transmitted from the base station at a predetermined electric field strength or more, and detecting the number of connectable links;
The first step wirelessly communicates with the base station using a predetermined data communication unit among the plurality of data communication units according to the number of connectable links detected in the second step. The control program for a data communication terminal according to claim 8, wherein: A second step of receiving, from the base station, information on a maximum allowable number of links for the number of connectable links;
The first step uses the predetermined data communication means in the plurality of data communication means according to the information of the connection allowable maximum link number detected by the connection allowable maximum link number detection means. 9. The control program for a data communication terminal according to claim 8, wherein the control program performs wireless communication with the data communication terminal. A second step of monitoring a data amount of data transmitted / received to / from the base station;
In the first step, when the amount of data monitored by the data flow rate monitoring unit exceeds a predetermined value, the plurality of data communication units that are not used for wireless communication are activated to establish wireless communication with the base station. 9. The data communication terminal control program according to claim 8, wherein communication is performed. A second step of monitoring a data amount of data transmitted / received to / from the base station;
When the amount of data monitored by the connection monitoring unit becomes smaller than a predetermined value, the first step stops driving the data communication unit that is no longer used for wireless communication, 9. The data communication terminal control program according to claim 8, wherein communication is performed.

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