JP2012134853A - Radio terminal device, control system, and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio terminal device, control system, and control method that can perform communication regulation equivalent to that of a second communication system if there is the communication regulation in the second communication system, even when a communication request is performed to the second communication system through a first communication system.SOLUTION: A mobile phone 1 to which a communication channel of a CDMA system is allocated according to a communication request in the case that the communication request is performed in the CDMA system during the use of an LTE system comprises: an acquisition part 32 acquiring communication regulation information in the CDMA system through the LTE system; and a determination part 33 determining propriety of communication in the CDMA system based on the acquired communication regulation information.

Description

  The present invention relates to a wireless terminal device, a control system, and a control method that can communicate with a plurality of communication systems.

  In recent years, as a communication system used by a wireless terminal device such as a mobile phone, an LTE (Long Term Evolution) communication system has appeared in addition to a circuit switched (CS) communication system (for example, CDMA). ing.

  However, the radio terminal apparatus cannot use both the LTE communication system (hereinafter referred to as LTE system) and the CDMA communication system (hereinafter referred to as CDMA system) at the same time. For this reason, the wireless terminal device cannot acquire the paging channel of the CDMA system while using the LTE system, and cannot know whether there is an incoming call. Therefore, in 3GPP TS 23.272, a CS Fallback function is defined, and by this function, an incoming request from a CDMA system can be notified in the LTE system (see, for example, Patent Document 1 and Non-Patent Document 1).

  In the CS Fallback function, when a CDMA system voice call is received from a wireless terminal device located in the LTE system network, the incoming call is transmitted from the CS domain via EPC (Evolved Packet Core) to the radio terminal device. It is notified to the terminal device. The wireless terminal device that has received the incoming call identifies that it is a voice incoming call by CS and captures the CDMA system. Then, the wireless terminal device transmits a response to the incoming call to the CDMA system, and a voice service is provided under the control of the CDMA system.

  In such a situation, when using the LTE system, the wireless terminal device captures the CDMA system and responds to an incoming call of the CDMA system notified by the CS Fallback function, or makes a call using the CDMA system. Communication needs to be established. Therefore, the present applicant has proposed a control method for shortening the time required for switching the communication system by acquiring the channel information of the communication channel in the CDMA system via the LTE system and synchronizing with the communication channel ( Japanese Patent Application No. 2010-272628).

JP 2009-267996 A

3GPP TS 23.272 V10.1.0, “Circuit Switched (CS) fallback in Evolved Packet System (EPS); Stage 2,” 2010-09

  By the way, when there is a transmission request from a wireless terminal device in a CDMA system, if transmission restriction is performed according to the congestion state of the CS network, it is usually determined whether or not transmission is possible before allocating a communication channel. However, when preprocessing up to synchronization with the communication channel is performed in the LTE system, the wireless terminal device can establish communication in synchronization with the communication channel even if the CDMA system restricts transmission. Then, since the wireless terminal device cannot follow the call regulation, congestion control by the CDMA system is not sufficiently performed.

  The present invention is a wireless terminal device capable of performing equivalent communication restriction if there is communication restriction in the second communication system even when a communication request is made to the second communication system via the first communication system. An object of the present invention is to provide a control system and a control method.

  When the wireless terminal device according to the present invention makes a communication request in the second communication system while using the first communication system, the communication channel of the second communication system is allocated according to the communication request. An acquisition unit that acquires communication restriction information in the second communication system via the first communication system, and the communication restriction information acquired by the acquisition unit, A determination unit that determines whether communication is possible in the second communication system.

  Moreover, it is preferable that the said acquisition part acquires the said communication control information regarding the said communication channel, when the said communication channel is allocated.

  In addition, the radio terminal apparatus according to the present invention includes a synchronization unit that synchronizes with a base station of the second communication system in advance and acquires identification data of the base station before performing location registration in the first communication system. In addition, it is preferable that the acquisition unit periodically acquires the communication restriction information related to the base station identified by the identification data via the first communication system.

  The communication restriction information is provided for each calling zone of the second communication system, and the acquisition unit is configured to call the second communication system corresponding to the calling zone of the first communication system. It is preferable that the communication restriction information in is periodically acquired through the first communication system.

  In addition, the acquisition unit is held in the first communication system and is based on the mapping data of the CS Fallback function defined in 3GPP TS 23.272, and corresponds to the calling zone of the first communication system. It is preferable to acquire the communication restriction information in the calling zone of the second communication system.

  Further, it is preferable that the determination unit determines whether or not communication is possible by a pseudo persistence test based on a condition in which communication indicated by the communication restriction information is permitted.

  The control system according to the present invention receives a communication request in the second communication system while using the first communication system from the wireless terminal device, and notifies the second communication system of the communication request. A first control device, a second control device that allocates a communication channel of the second communication system in response to the notified communication request, and notifies the wireless terminal device via the first control device; The wireless terminal device includes: an acquisition unit that acquires communication restriction information in the second communication system via the first communication system; and the communication acquired by the acquisition unit And a determination unit that determines whether communication is possible in the second communication system based on restriction information, wherein the control device of the first communication system is connected to the control device of the second communication system. Receiving the communication regulation information and notifies to the wireless terminal device.

  In the control method according to the present invention, when a communication request is made in the second communication system while using the first communication system, a communication channel of the second communication system is allocated according to the communication request. A method for controlling a wireless terminal device, the acquisition step of acquiring communication restriction information in the second communication system via the first communication system, and the communication restriction information acquired in the acquisition step And a determination step of determining whether communication is possible in the second communication system.

  According to the present invention, even if the wireless terminal device makes a communication request to the second communication system via the first communication system, if there is communication restriction in the second communication system, equivalent communication is possible. Regulations are made.

1 is an external perspective view of a mobile phone according to a first embodiment. It is a block diagram which shows the function of the mobile telephone which concerns on 1st Embodiment. It is a sequence diagram which shows a process when there exists a voice transmission request | requirement at the time of using the network of the LTE system which concerns on 1st Embodiment. It is a sequence diagram which shows a process when there exists a voice transmission request | requirement at the time of using the network of the LTE system which concerns on 2nd Embodiment. It is a sequence diagram which shows a process when there exists a voice transmission request | requirement at the time of using the network of the LTE system which concerns on 3rd Embodiment. It is a block diagram which shows the function of the mobile telephone which concerns on 4th Embodiment. It is a sequence diagram which shows a process when there exists an audio | voice transmission request | requirement at the time of using the network of the LTE system which concerns on 4th Embodiment.

<First Embodiment>
Hereinafter, the first embodiment will be described as an example of a preferred embodiment of the present invention. In the present embodiment, a mobile phone 1 will be described as an example of a wireless terminal device.

FIG. 1 is an external perspective view of a mobile phone 1 according to the present embodiment.
FIG. 1 shows a so-called foldable mobile phone, but the mobile phone according to the present invention is not limited to this. For example, a sliding type in which one casing is slid in one direction from a state in which both casings are overlapped, or a rotary type in which one casing is rotated around an axis along the overlapping direction ( Turn type), or a type (straight type) in which the operation unit and the display unit are arranged in one housing and does not have a connecting unit.

  The mobile phone 1 includes an operation unit side body 2 and a display unit side body 3. The operation unit side body 2 includes an operation unit 11 on the front surface unit 10 and a microphone 12 to which a voice uttered by a user of the mobile phone 1 during a call or when using a voice recognition application is input. The The operation unit 11 includes a function setting operation button 13 for activating various functions such as various setting functions, a telephone book function, and a mail function, and an input operation button 14 for inputting numbers of telephone numbers, mail characters, and the like. , And a determination operation button 15 for performing determination and scrolling in various operations.

  The display unit side body 3 includes a display unit 21 for displaying various types of information on the surface unit 20 and a receiver 22 for outputting the voice of the other party of the call.

  Further, the upper end portion of the operation unit side body 2 and the lower end portion of the display unit side body 3 are connected via a hinge mechanism 4. In addition, the mobile phone 1 relatively rotates the operation unit side body 2 and the display unit side body 3 which are connected via the hinge mechanism 4, so that the operation unit side body 2 and the display unit side body 3 are rotated. The body 3 can be in an open state (open state), or the operation unit side body 2 and the display unit side body 3 can be folded (closed state).

FIG. 2 is a block diagram showing functions of the mobile phone 1 according to the present embodiment.
The mobile phone 1 includes an operation unit 11, a display unit 21, a control unit 30, a communication unit 40, a storage unit 50, and a voice control unit 60.

  The control unit 30 controls the entire mobile phone 1, and performs predetermined control on each unit such as the display unit 21 and the communication unit 40, for example. In addition, the control unit 30 receives input from the operation unit 11, the communication unit 40, and the like, and executes various processes. And the control part 30 controls the memory | storage part 50 in the case of a process execution, reads various programs and data, and writes data. Detailed functions of the control unit 30 according to the present embodiment will be described later.

  The communication unit 40 communicates with an external device (base station) in a predetermined use frequency band (for example, 2 GHz band, 800 MHz band, etc.). Then, the communication unit 40 demodulates the signal received from the antenna, supplies the processed signal to the control unit 30, modulates the signal supplied from the control unit 30, and transmits the signal from the antenna to the external device. To do.

  Here, in this embodiment, the communication unit 40 is a communication protocol mainly used for high-speed data communication and W-CDMA and CDMA2000_1x (hereinafter referred to as CDMA) systems that are communication protocols for voice and data communication. Both the LTE system and the communication system of any protocol can be communicated. The communication unit 40 communicates with the base station using any protocol based on a command from the control unit 30. The mobile phone 1 prioritizes communication in the LTE system (first communication system) using the LTE method during data communication, and switches to communication using the CDMA system (second communication system) using the CDMA method during voice communication. Shall.

  The storage unit 50 includes, for example, a working memory and is used for arithmetic processing by the control unit 30. In addition, various programs according to the present embodiment are stored.

  The sound control unit 60 performs predetermined sound processing on the signal supplied from the communication unit 40 under the control of the control unit 30, and outputs the processed signal to the receiver 22. The receiver 22 outputs the signal supplied from the audio control unit 60 to the outside. This signal may be output from a speaker (not shown) instead of the receiver 22 or together with the receiver 22. In addition, the voice control unit 60 processes the signal input from the microphone 12 according to the control of the control unit 30, and outputs the processed signal to the communication unit 40. The communication unit 40 performs a predetermined process on the signal supplied from the audio control unit 60 and outputs the processed signal from the antenna.

Next, the function of the control unit 30 will be described in detail.
The control unit 30 includes a switching unit 31, an acquisition unit 32, and a determination unit 33, and performs control based on a transmission restriction state provided for each paging zone or base station in the CDMA system.
Note that the outgoing call restriction state includes a full restriction state in which all voice call outgoing requests from the mobile phone 1 are not allowed, and a partial restriction state in which only a predetermined percentage of outgoing requests are allowed.

  When a communication request in the CDMA system occurs when the switching unit 31 is registered in the LTE system, a communication channel in the paging zone of the CDMA system corresponding to the paging zone of the LTE system is assigned. For this communication request, for example, while browsing a web page via the LTE system by a browser, a character string assigned with a Phone to function (linked with a telephone number) is selected to make a call. It occurs in some cases. When the determination unit 33 determines that transmission is possible, the switching unit 31 shifts to communication in the CDMA system in synchronization with the communication channel based on the notified channel information.

  At this time, the LTE system control device (hereinafter referred to as the LTE control device) determines a CDMA system call zone corresponding to the LTE system call zone based on the mapping data of the CS Fallback function, and manages this call zone. Various notification data are transmitted and received in cooperation with a control device (hereinafter referred to as a CDMA control device).

  The acquisition unit 32 acquires transmission restriction information in the CDMA system via the LTE system. Specifically, when a communication channel is allocated from the CDMA system via the LTE system, the acquisition unit 32 acquires the call restriction information in this communication channel, particularly in the corresponding call zone in the CDMA system.

The determination unit 33 determines whether or not transmission is possible in the CDMA system based on the transmission restriction information acquired by the acquisition unit 32. Specifically, the determination unit 33 determines whether or not transmission is possible by a pseudo persistence test based on the conditions such as the ratio of transmission permitted by the transmission restriction information and the identification data of the mobile phone 1.
For example, the determination unit 33 generates a random number within a predetermined range when the transmission restriction condition permits transmission at a predetermined rate (acceptance rate specified for each base station or paging zone of the CDMA system). By comparing the threshold value with the magnitude, it is possible to determine whether the transmission is successful or not with a specified pass rate.

  FIG. 3 is a sequence diagram showing processing when a voice call request is made when using the network of the LTE system according to the present embodiment.

  In step S1, the mobile phone 1 is allocated resources under the management of the LTE control device and uses the network of the LTE system.

  In step S <b> 2, the mobile phone 1 receives a voice call request from the user via the operation unit 11 or the like.

  In step S3, the mobile phone 1 notifies the call request accepted in step S2 to the LTE control device of the LTE system in which the location is registered through the assigned LTE resource.

  In step S4, the LTE control device notifies the call request in step S3 to the CDMA control device associated with the mapping data via EPC and CS.

  In step S <b> 5, the CDMA control device performs an authentication process for confirming that the mobile phone 1 that has issued the call request is an authorized user. Note that this authentication process can be omitted.

  In step S6, the CDMA control device determines a communication channel to be allocated in the CDMA system so that the mobile phone 1 that has issued the call request performs a voice call.

  In step S7, the CDMA control apparatus notifies the LTE control apparatus via CS and EPC of channel information for synchronizing with the communication channel allocated in step S6 and transmission restriction information in the CDMA system. Specifically, for example, in the case of CDMA2000_1x, the channel information includes a PN code offset, a frequency channel such as a band class, identification information (Walsh code), and the like.

  In step S8, the LTE control device notifies the mobile phone 1 of the channel information and the call restriction information notified in step S7 using the allocated LTE resource.

  In step S9, the mobile phone 1 performs a pseudo persistence test based on the outgoing call restriction information notified in step S8, and determines whether or not outgoing calls are possible. If this determination is YES, the process proceeds to step S10, and if the determination is NO, transmission is not permitted and the process ends without transitioning to the CDMA system.

  In step S10, the mobile phone 1 establishes communication with the CDMA system in synchronization with the communication channel using the channel information acquired in step S8.

  In step S11, the mobile phone 1 performs voice communication on the network of the CDMA system using the communication channel synchronized in step S10.

  In step S12, when the voice communication in step S11 ends, the mobile phone 1 returns to the LTE system network that is prioritized over the CDMA system.

  As described above, according to the present embodiment, since the mobile phone 1 can acquire the call restriction information of the CDMA system via the LTE system, the call restriction of the CDMA system is changed when the mobile phone 1 transitions from the LTE system to the CDMA system. Even if the process is bypassed, the equivalent outgoing call restriction can be implemented.

  In addition, since the mobile phone 1 can acquire transmission restriction information related to the actually assigned communication channel, it is possible to perform transmission restriction based on accurate call restriction information of the calling zone or base station in which the mobile phone 1 is registered. it can.

Second Embodiment
Hereinafter, the second embodiment will be described as an example of a preferred embodiment of the present invention. In the first embodiment, the channel information and the transmission restriction information are simultaneously notified to the mobile phone 1, but in this embodiment, the channel information and the transmission restriction information are notified at different timings.

FIG. 4 is a sequence diagram showing processing when a voice call request is made when using the network of the LTE system according to the present embodiment.
Note that steps S21 to S26 are the same as steps S1 to S6 of the first embodiment, and steps S35 to S37 are the same as steps S10 to S12 of the first embodiment.

  In step S27, the CDMA control device notifies the LTE control device of transmission restriction information regarding the base station having the communication channel assigned in step S26 via CS and EPC.

  In step S28, the LTE control device notifies the mobile phone 1 of the call restriction information notified in step S27 using the allocated LTE resource.

  In step S29, the mobile phone 1 performs a pseudo persistence test based on the call restriction information notified in step S28, and determines whether or not the call can be made. If this determination is YES, the process proceeds to step S30. If the determination is NO, transmission is not permitted, and the process ends without transitioning to the CDMA system.

  In step S <b> 30, the cellular telephone device 1 makes a communication channel assignment request to the LTE control device again via the assigned LTE resource in order to perform a voice call in the CDMA system.

  In step S31, the LTE control device notifies the allocation request in step S30 to the CDMA control device associated with the mapping data via EPC and CS.

  In step S32, the CDMA control device determines a communication channel to be allocated in the CDMA system so that the mobile phone 1 that has requested the communication channel allocation makes a voice call.

  In step S33, the CDMA control apparatus notifies the LTE control apparatus of channel information for synchronizing with the communication channel allocated in step S32 via CS and EPC. Specifically, the channel information includes a PN code offset, a frequency channel such as a band class, and identification information (Walsh code).

  In step S34, the LTE control device notifies the mobile phone 1 of the channel information notified in step S33 using the allocated LTE resource.

  As described above, according to the present embodiment, the mobile phone 1 is shortened in the time from receiving the channel information to synchronizing with the communication channel. That is, in the first embodiment, after receiving the channel information, the pseudo-persistence test process is performed to synchronize with the communication channel, and thus the resources of the allocated communication channel are unused during this process. In the present embodiment, the CDMA control device can know in a timely manner that the mobile phone 1 has passed the pseudo persistence test, and therefore can efficiently allocate channel resources.

<Third Embodiment>
Hereinafter, a third embodiment will be described as an example of a preferred embodiment of the present invention. In the present embodiment, the configurations of the acquisition unit 32 and the storage unit 50 are different from those of the first embodiment. It is assumed that the outgoing call restriction information is provided for each calling zone of the CDMA system.

The acquisition unit 32 periodically acquires transmission restriction information in the calling zone of the CDMA system corresponding to the calling zone of the LTE system. That is, the acquisition unit 32 acquires transmission restriction information in the paging zone of the CDMA system corresponding to the paging zone of the LTE system, based on mapping data of the CS Fallback function held in the LTE system.
Then, the storage unit 50 stores transmission restriction information that is periodically acquired by the acquisition unit 32.

  Then, when voice transmission is requested, the determination unit 33 determines whether or not transmission is permitted before the switching unit 31 notifies the CDMA system of the transmission request via the LTE system. The processing of the unit 31 can be suppressed.

  FIG. 5 is a sequence diagram showing processing when a voice call request is made when using the network of the LTE system according to the present embodiment.

  In step S41, the mobile phone 1 is allocated resources under the management of the LTE control device, and uses the network of the LTE system.

  In step S42, the LTE control device acquires and assigns call restriction information in the paging zone of the CDMA system corresponding to the paging zone of the LTE system in which the mobile phone 1 is registered based on the mapping data of the CD Fallback function. The mobile phone 1 is periodically notified using the existing LTE resource.

  In step S <b> 43, the mobile phone 1 receives a voice call request from the user via the operation unit 11 or the like.

  In step S44, the mobile phone 1 performs a pseudo persistence test based on the call restriction information notified in step S42, and determines whether or not the call can be made. If this determination is YES, the process proceeds to step S45, and if the determination is NO, transmission is not permitted and the process ends without transitioning to the CDMA system.

  In step S45, the mobile phone 1 notifies the call request accepted in step S43 to the LTE control device of the LTE system that has registered the location via the assigned LTE resource.

  In step S46, the LTE control device notifies the call request in step S45 to the CDMA control device associated with the mapping data via EPC and CS.

  In step S47, the CDMA control device performs an authentication process for confirming that the mobile phone 1 that has issued the call request is a legitimate user. Note that this authentication process can be omitted.

  In step S48, the CDMA control device determines a communication channel to be allocated in the CDMA system so that the mobile phone 1 that has issued the call request makes a voice call.

  In step S49, the CDMA control apparatus notifies the LTE control apparatus of channel information for synchronizing with the communication channel allocated in step S48 via CS and EPC.

  In step S50, the LTE control device notifies the mobile phone 1 of the channel information notified in step S49 using the allocated LTE resource.

  In step S51, the mobile phone 1 establishes communication with the CDMA system in synchronization with the communication channel using the channel information acquired in step S50.

  In step S52, the mobile phone 1 performs voice communication on the network of the CDMA system using the communication channel synchronized in step S51.

  In step S53, when the voice communication in step S52 ends, the mobile phone 1 returns to the network of the LTE system that has priority over the CDMA system.

  As described above, according to the present embodiment, the mobile phone 1 transmits the call restriction information in the paging zone of the CDMA system corresponding to the paging zone of the LTE system where the location is registered, based on the mapping data of the CS Fallback function. Can be acquired regularly. Therefore, when a call request is generated, the mobile phone 1 can immediately determine whether or not the call can be made, and can suppress useless call request notifications.

<Fourth embodiment>
Hereinafter, a fourth embodiment will be described as an example of a preferred embodiment of the present invention.

  FIG. 6 is a block diagram showing functions of the mobile phone 1 according to the present embodiment. In this embodiment, compared with 3rd Embodiment, the structure of the control part 30 and the memory | storage part 50 differs, and the control part 30 is further provided with the synchronizer 34. FIG.

The synchronization unit 34 synchronizes with the base station of the CDMA system in advance before registering the location in the LTE system, acquires the identification data of this base station, and stores it in the storage unit 50.
Then, the acquisition part 32 can acquire regularly the transmission control information regarding the base station identified by this identification data by notifying the LTE control apparatus of the stored identification data. Then, the storage unit 50 stores transmission restriction information that is periodically acquired by the acquisition unit 32.

  Thereby, when voice transmission is requested, the determination unit 33 determines whether or not transmission is permitted before the switching unit 31 notifies the CDMA system of the transmission request via the LTE system. Processing of the switching unit 31 can be suppressed.

  Note that the synchronization unit 34 can acquire synchronization information including the system time of the CDMA system in advance, so that the switching unit 31 can easily synchronize with the assigned communication channel using the synchronization information.

  FIG. 7 is a sequence diagram showing processing when a voice call request is made when using the network of the LTE system according to the present embodiment.

  In step S61, the mobile phone 1 synchronizes with the base station of the CDMA system before registering the location in the LTE system, and at least acquires identification data of the base station, and then suspends the CDMA system.

  In step S62, the mobile phone 1 is allocated resources under the management of the LTE control device, and starts using the network of the LTE system.

  In step S63, the mobile phone 1 notifies the LTE control device of the identification data acquired in step S61 via the allocated LTE resource. Then, the LTE control apparatus acquires transmission restriction information regarding the base station identified by the notified identification data, and periodically notifies the mobile phone 1 using the allocated LTE resource.

  In step S <b> 64, the mobile phone 1 receives a voice call request from the user via the operation unit 11 or the like.

  In step S65, the mobile phone 1 performs a pseudo persistence test based on the call restriction information notified in step S63, and determines whether or not the call can be made. If this determination is YES, the process proceeds to step S66. If the determination is NO, transmission is not permitted, and the process ends without transitioning to the CDMA system.

  In step S66, the mobile phone 1 notifies the call request accepted in step S64 to the LTE control device of the LTE system that has registered the location via the assigned LTE resource.

  In step S67, the LTE control device notifies the call request in step S66 to the CDMA control device associated with the mapping data via the EPC and CS.

  In step S <b> 68, the CDMA control device performs an authentication process for confirming that the mobile phone 1 that has issued the call request is an authorized user. Note that this authentication process can be omitted.

  In step S69, the CDMA control device determines a communication channel to be allocated in the CDMA system so that the mobile phone 1 that has issued the call request makes a voice call.

  In step S70, the CDMA controller notifies the LTE controller of channel information for synchronizing with the communication channel allocated in step S69 via CS and EPC.

  In step S71, the LTE control device notifies the mobile phone 1 of the channel information notified in step S70 using the allocated LTE resource.

In step S72, the mobile phone 1 establishes communication with the CDMA system in synchronization with the communication channel using the channel information acquired in step S71.
In step S61, when the synchronization information including the system time of the CDMA system is acquired, the mobile phone 1 can be more easily synchronized with the communication channel.

  In step S73, the mobile phone 1 performs voice communication on the network of the CDMA system using the communication channel synchronized in step S72.

  In step S74, when the voice communication in step S73 ends, the mobile phone 1 returns to the network of the LTE system that has priority over the CDMA system.

  As described above, according to the present embodiment, since the identification data of the base station of the CDMA system can be acquired in advance before the location registration in the LTE system, the transmission related to the base station that is the transition destination based on the identification data. Regularly obtain regulatory information. Therefore, when a call request is generated, the mobile phone 1 can immediately determine whether or not the call can be made, and can suppress useless call request notifications.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

  In the above-described embodiment, voice transmission has been described as an example. However, the present invention is not limited to this, and can be applied to, for example, a packet communication service in a CDMA system. In this case, the present invention can be applied to both outgoing and incoming calls.

  The W-CDMA scheme, the CDMA2000_1x scheme, and the LTE scheme in the above-described embodiment are merely examples, and other communication protocols may be used. The same applies to, for example, the GSM method and a method specialized for data communication as long as there is cooperation between zones at the time of location registration.

  Further, the wireless terminal device according to the present invention is not limited to the mobile phone 1. The present invention can be applied to various devices such as a PHS (registered trademark), a personal digital assistant (PDA), a game machine, a navigation device, a personal computer, and a communication dedicated module specialized for a communication function. .

1 Mobile phone (electronic equipment)
DESCRIPTION OF SYMBOLS 11 Operation part 21 Display part 30 Control part 31 Switching part 32 Acquisition part 33 Determination part 34 Synchronization part 40 Communication part 50 Storage part 60 Voice control part

Claims (8)

When a communication request is made in the second communication system while using the first communication system, a wireless terminal device to which a communication channel of the second communication system is assigned according to the communication request,
Via the first communication system, an acquisition unit for acquiring communication restriction information in the second communication system;
A wireless terminal apparatus comprising: a determination unit that determines whether communication is possible in the second communication system based on the communication restriction information acquired by the acquisition unit.   The wireless terminal device according to claim 1, wherein the acquisition unit acquires the communication restriction information related to the communication channel when the communication channel is assigned. Before the location registration in the first communication system, it further comprises a synchronization unit that synchronizes with the base station of the second communication system in advance and acquires identification data of the base station,
The wireless terminal apparatus according to claim 1, wherein the acquisition unit periodically acquires the communication restriction information related to a base station identified by the identification data via the first communication system. The communication restriction information is provided for each calling zone of the second communication system,
The acquisition unit periodically acquires the communication restriction information in the calling zone of the second communication system corresponding to the calling zone of the first communication system via the first communication system. The wireless terminal device described in 1.   The acquisition unit is held in the first communication system, and the second corresponding to the paging zone of the first communication system based on mapping data of the CS Fallback function defined in 3GPP TS 23.272 The radio | wireless terminal apparatus of Claim 4 which acquires the said communication control information in the calling zone of the communication system of.   The radio according to any one of claims 1 to 5, wherein the determination unit determines whether or not communication is possible by a pseudo persistence test based on a condition in which communication indicated by the communication restriction information is permitted. Terminal device. A wireless terminal device, a first control device that receives a communication request in the second communication system while using the first communication system from the wireless terminal device, and notifies the second communication system, and the notification A control system comprising: a second control device that allocates a communication channel of the second communication system in response to the communication request made and notifies the wireless terminal device via the first control device;
The wireless terminal device
Via the first communication system, an acquisition unit for acquiring communication restriction information in the second communication system;
A determination unit that determines whether communication is possible in the second communication system based on the communication restriction information acquired by the acquisition unit;
The control device of the first communication system receives the communication restriction information from the control device of the second communication system and notifies the wireless terminal device. When a communication request is made in the second communication system while using the first communication system, the wireless terminal device control method is assigned a communication channel of the second communication system in response to the communication request. And
An acquisition step of acquiring communication restriction information in the second communication system via the first communication system;
And a determination step of determining whether communication is possible in the second communication system based on the communication restriction information acquired in the acquisition step.

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