JP4689496B2 - Wireless terminal apparatus, control method therefor, and wireless base station apparatus - Google Patents

Description

  The present invention relates to a radio terminal apparatus that performs communication by transmitting and receiving radio signals, a control method thereof, and a radio base station apparatus.

  In recent years, multicarrier communication in which communication is performed using a plurality of carrier waves (carriers) has become common. In this multi-carrier communication, even if a propagation failure occurs in a carrier of a specific frequency, there is an advantage that communication interruption can be avoided by using another carrier, and deterioration in communication quality can be prevented. is there. Moreover, there is an advantage that the frequency band can be used effectively.

In the following Patent Document 1, in a wireless communication system capable of multi-carrier communication, when the base station is notified to the terminal that transmission of a part of subcarriers being used is temporarily stopped, the terminal However, based on this notification information, a technique for measuring the status (radio wave status) of the frequency band of a subcarrier whose transmission is stopped during a period when the transmission of the subcarrier is stopped is disclosed. Then, by continuing communication between the terminal and the base station using subcarriers whose transmission is not stopped, while ensuring the continuous time necessary to obtain sufficient detection accuracy of the propagation status, while detecting It is possible to maintain the current communication without interruption.
JP 2005-94672 A

  Incidentally, in recent years, reorganization of frequency bands has been studied in order to make effective use of frequency bands used in wireless communication systems and to match the used frequency bands with the global standard specifications. For example, in a CDMA2000 1x (Code division Multiple Access 2000 1x) wireless communication system, the Japanese 800 MHz band is currently used in Japan, but this frequency band has been reorganized to the new 800 MHz band, which is a global standard specification. That is scheduled. The old 800 MHz band and the new 800 MHz band are different in uplink and downlink allocation in the frequency band to be used.

  A terminal capable of communicating only in the current frequency band (old 800 MHz band) becomes unable to communicate when the frequency band is reorganized. For this reason, in the present situation where the reorganization of the frequency band is scheduled, a terminal capable of communication using the current frequency band (old 800 MHz band) and communication using the new frequency band (new 800 MHz band) is prepared. There is a need to. Reorganization of frequency bands is not performed all at once in the country, but gradually. Therefore, terminals that can communicate using both frequency bands search for the other frequency band when one frequency band does not exist. Designed to do.

  However, if the terminal is designed to search the current frequency band and a new frequency band, if a radio signal in the current frequency band stops, the terminal must always search for the current frequency band and fail. A new frequency band is searched, and there is a problem that time and power are wasted. For example, such a search is frequently performed at the terminal each time it moves between the call areas, and thus there is a problem that power is wasted at the terminal.

  The present invention has been made in view of the above circumstances, and provides a wireless terminal device, a control method thereof, and a wireless base station device that can suppress time and power consumption by reducing useless searches. With the goal.

In order to solve the above problems, the following means were adopted.
A radio terminal apparatus according to the present invention includes a radio communication unit capable of transmitting and receiving radio signals in a plurality of communication systems, a control unit that searches a plurality of channels of each of the plurality of communication systems based on a predetermined search system, , wherein the control unit, when the wave-stopping information indicating the wave-stopping schedule of the radio signal in the first communication system and received by the wireless communication unit is pre-set to the wave-stopping information and the own device A stop setting process for setting a scheduled stop time is executed based on the unique information. When the scheduled stop time is reached, the predetermined search system is searched for including the channel of the first communication system. It is possible to execute a change process for changing from one search system to a second search system for performing a search without including the channel of the first communication system.
A radio terminal apparatus according to the present invention includes a radio communication unit capable of transmitting and receiving radio signals in a plurality of communication systems, a control unit that searches a plurality of channels of each of the plurality of communication systems based on a predetermined search system, The wireless communication unit includes, as the stop information, information about a stop of transmission of the radio signal in the first communication system, together with area information of a region where the stop is performed or identification information of a base station. And when the base station in communication with the wireless unit is a base station indicated by the identification information, it is based on the stop information. The first search for executing the stop setting process for setting the scheduled stop time and performing the search including the channel of the first communication system when the scheduled stop time is reached. From the system, characterized in that it is a feasible and changing process of changing the second search scheme that performs a search without the channel of the first communication system.
A stop timer, the stop information includes scheduled time information indicating a scheduled stop date and / or a scheduled time, and the stop setting process performs setting of the timer based on the scheduled time information, The change process is performed by the timer counting the set time.
The stop information includes stop change information indicating the planned change of the stop, and when the control unit receives the stop change information, the setting change that changes the setting at the scheduled stop time The process is further executable.
The stop information includes forcible return information indicating that either the stop or scheduled stop is canceled, and the control unit, when receiving the forcible return information, sets the predetermined search system. A return process for returning from the second search system to the first search system can be executed.
The said control part sets the said scheduled stop time in the said stop setting process according to the specific information previously set to the own apparatus in addition to the said stop information.
The control unit, when receiving the stop information, does not set the timer if the stop schedule exceeds a predetermined time.
The control unit performs the search using the first search system when the channel is not found by the search using the second search system.
The control unit performs a search using the first search system when there is a radio base station that is not scheduled to stop around the radio terminal device.
After the control unit is changed to the second search system, the control unit returns to the first search system when waiting in the first communication system is possible.
Control method for a wireless terminal device according to the present invention, the search based and capable of transmitting and receiving radio communication section radio signals at a plurality of communication systems, a plurality of channels having each the plurality of communication systems in a predetermined search system In a control method of a wireless terminal device comprising a control unit, a first search step for performing a search including a channel of the first communication system, and a second search for performing a search without including a channel of the first communication system A step of receiving, by the wireless communication unit, stop information indicating a stoppage schedule of the radio signal in the first communication system, and based on the stop information and unique information preset in the own device. setting a time wave-stopping expected, at the time of the wave-stopping event, the predetermined search system, the second search stearyl from said first search step Characterized by a step of changing the flop.
A method for controlling a radio terminal apparatus according to the present invention searches a radio communication unit capable of transmitting and receiving radio signals in a plurality of communication systems and a plurality of channels of each of the plurality of communication systems based on a predetermined search system. In a control method of a wireless terminal device comprising a control unit, a first search step for performing a search including a channel of the first communication system, and a second search for performing a search without including a channel of the first communication system And a step of receiving, by the wireless communication unit, a stoppage schedule of the radio signal in the first communication system as stoppage information together with area information of a region where the stoppage is performed or identification information of a base station, When the device is in the area indicated by the area information, or the base station communicating with the radio unit is the base station indicated by the identification information , Setting a scheduled stop time based on the stop information, and changing the predetermined search system from the first search step to the second search step when the scheduled stop time is reached. It is characterized by.
The radio base station apparatus according to the present invention has a radio unit for transmitting and receiving radio signals between the mobile station apparatus using channels with a plurality of communication systems is connected to a communication network that mediates communication radio In the base station apparatus, the stoppage schedule of the radio signal in the first communication system, which is one of the plurality of frequency bands, is stopped together with area information of the area where the stoppage is performed or identification information of the base station. a control unit for transmitting a communication system including a first communication system as the information, the control unit from the communication network, the information about the stop of the first communication system is notified, the wave-stopping information Is transmitted .
When transmitting the forced return information indicating that either the stop or the scheduled stop of the wave is canceled , the control unit transmits the transmission to the radio unit at least differently from the first communication system. The system is characterized in that it is performed by a system including the communication system 2.

  According to the present invention, when the stop information indicating that the transmission of the radio signal from the radio base station apparatus to the radio terminal apparatus is stopped is received, the timer is set based on the stop information, and the timer Since the search system for the channel that is stopped when the predetermined time is counted is changed, useless searches are reduced, and time and power consumption can be suppressed.

  Hereinafter, a radio terminal apparatus, a control method thereof, and a radio base station apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a schematic configuration of a wireless communication system including a wireless terminal device and a wireless base station device according to an embodiment of the present invention. As shown in FIG. 1, the wireless communication system includes a wireless terminal device (hereinafter referred to as a terminal) 10 and a wireless base station device (hereinafter referred to as a base station) 20. For example, only one base station 20 is illustrated in FIG. 1 for the sake of simplicity. In FIG. 1, only one terminal 10 is shown.

  As illustrated in FIG. 1, the terminal 10 includes a wireless communication unit 11, a key input unit 12, a voice input / output unit 13, a display unit 14, and a control unit 15. The radio communication unit 11 transmits and receives radio signals to and from the base station 20 via a channel assigned by the base station 20. The wireless communication unit 11 can transmit and receive wireless signals in a plurality of communication systems (frequency bands). Specifically, wireless signals can be transmitted and received using the current frequency band (old 800 MHz band) and the new frequency band (new 800 MHz band).

  The key input unit 12 includes various operation keys such as a call key, an end key, a numeric keypad, and a soft key, and outputs a signal corresponding to the operation content by the user to the control unit 15. The audio input / output unit 13 includes a microphone and a speaker. The audio input / output unit 13 outputs an audio signal output from the microphone to the control unit 15 and outputs an audio signal output from the control unit 15 to the speaker. The display unit 14 includes, for example, a liquid crystal display device, and performs display based on a signal output from the control unit 15.

  The control unit 15 controls the operation of the terminal 10. Specifically, the audio signal (audio data) included in the signal output from the wireless communication unit 11 is subjected to decompression processing, D / A conversion processing (digital / analog conversion processing), and the like as audio signals. The audio signal output from the audio input / output unit 13 is subjected to A / D conversion processing (analog / digital conversion processing) compression processing or the like and output to the wireless communication unit 11.

  Further, the control unit 15 controls a search system performed by the wireless control unit 11. Here, the search system refers to searching for channel availability in a plurality of frequency bands. As described above, the wireless communication unit 11 can transmit and receive wireless signals using the current frequency band (old 800 MHz band) and transmit and receive wireless signals using a new frequency band (new 800 MHz band). If searches in both frequency bands are frequently performed, it takes time for the search, and the terminal 10 consumes power wastefully. In order to prevent these, the control unit 15 receives the stop information indicating that the transmission of the radio signal transmitted from the base station 20 is stopped by the radio communication unit 11, and the radio signal from the base station 20 is stopped. Control is performed so that only a search in a new frequency band (new 800 MHz band) is performed at the time of being performed.

  The control unit 15 includes a timer 16 and a flag storage unit 17, and sets the time until the radio signal from the base station 20 is stopped in the timer 16. When the time measurement by the timer 16 is completed, the flag is stored in the flag storage unit 17 to change the search system. The details of the search system change method performed by the control unit 15 will be described later.

  Further, the control unit 15 performs standby processing. Here, the standby processing specifies the base station 20 with the best condition for the terminal 10 (base station 20 having the best electric field strength, signal wave-to-interference ratio, etc .: standby base station) and has the base station. The process of constantly receiving radio waves on a channel. In addition, the control unit 15 performs display control of the display unit 14 and performs various controls according to the operation content of the key input unit 12. The control unit 18 includes a clock unit 18, and the current time can be acquired from the clock unit 18. Further, the control unit 15 can acquire the current time also by notification from the base station 20 or acquisition of time information by a GPS signal by a separately provided GPS signal receiving unit.

  The base station 20 includes a radio unit 21 and a control unit 22. The radio unit 21 allocates a channel to the terminal 10 and transmits / receives a radio signal to / from the terminal 10. The radio unit 21 can transmit and receive radio signals in a plurality of frequency bands. Specifically, wireless signals can be transmitted and received using the current frequency band (old 800 MHz band), the new frequency band (new 800 MHz band), and another frequency band (2 GHz). The control unit 22 causes the radio unit 21 to transmit stop information indicating that the terminal 20 is scheduled to stop transmission of any of the plurality of frequency bands. Specifically, information indicating a schedule for stopping transmission of a radio signal in the current frequency band (old 800 MHz band: the first communication system) and starting transmission of a radio signal in a new frequency band in some cases. Including the data to be transmitted to the wireless unit 21. Although not shown, all the base stations are connected to a communication network operated by a communication carrier, and transmission of transmission information from the terminal 10 to other terminals via the communication network, or from the communication network Mediates transmission of information addressed to specific terminals. In addition, the setting change of the base station is notified from the communication network, and the control unit 22 also performs information transmission / reception with these communication networks.

  Here, the stop information transmitted from the base station 20 will be described. FIG. 2 is a diagram illustrating an example of stop information transmitted from the base station 20. As shown in FIG. 2, the stop information includes four fields F1 to F4. The field F11 is a field in which the stop time is stored. For example, when the stop time is midnight on July 13, 2012, “2012.7.13” is stored, and “00:00:00” is stored as the stop time. . Of course, relative scheduled time information such as “hours and minutes after now” may be used instead of specific dates and times.

  The field F12 is a field in which a planned stop area is stored. For example, when the base station A installed in Hokkaido is stopped, “Hokkaido: base station A” is stored. A field F13 is a field in which a planned stoppage frequency is stored. For example, in the case where 968 ch of a frequency band (Band Class: BC) of 3 is stopped, “BC: 3 968 ch” is stored.

  The field F14 is a field in which a status indicating a situation of a planned stoppage is stored. The statuses stored in this field F14 include “scheduled stop”, “stop change”, and “forced return”. “Scheduled stop” is a status indicating that a stop is scheduled, “Stop change” is a status indicating a change in stop time, and “Forced return” is either a stop or a stop plan. This is a status indicating that the release is to be canceled. That is, if “scheduled stop” is stored in the field F14, it means that the stop is performed at the date and time stored in the field F11, and “stop change” is stored in the field F14. In this case, it means that the stop time has been changed to the date and time stored in the field F11. If “forced return” is stored in the field F14, either the stop or the scheduled stop Means that has been released.

  Next, the operation of the wireless communication system having the above configuration will be described. First, when the frequency band of the radio signal transmitted from the base station 20 is switched, the control unit 22 of the base station 20 controls the radio unit 21 to transmit the stop information to the radio unit 21. This stop information is put on SMS (Short Message Service) or broadcast information, and the terminal 10 is provided with at least a frequency band to be stopped using a BCC (Broadcast Channel) that distributes information to all receivable terminals. It is transmitted in the frequency band that includes it. When this stop information is received by the terminal 10, the process shown in FIG. 3 is started. By transmitting in the communication system (frequency band) that is the target of the stoppage, the terminal that uses the communication system is not left as much as possible. FIG. 3 is a flowchart illustrating an example of control performed by the control unit 15 of the terminal 10 when the stop information whose status is scheduled to stop is received.

  When the base station 20 is notified of the stop of the first communication system (old 800 MHz band) from the communication network, the base station 20 transmits the stop information at least in the communication system including the first communication system to be stopped. To do. When the stop information transmitted from the base station 20 is received by the wireless communication unit 11, the stop information is output to the control unit 15 (step S11). The control unit 15 determines whether or not the current position is the planned stop area based on the planned stop area stored in the field F12 of the stop information from the wireless communication unit 11 (step S12). Note that identification information such as a base station ID assigned in advance to the base station 20 is always transmitted from the base station 20 separately from the above-mentioned stop information, and the control unit 15 indicates that this identification information is Whether or not the current position is the planned stoppage area is determined based on whether or not it matches the planned stoppage area stored in the field F12. In addition, there are various methods for designating the planned stop area. If the wireless communication system is based on the assumption that the terminal 10 can detect position information from GPS information, cells and sectors configured on the wireless communication system can be specified even if the geographical location information is designated as the planned stoppage area. Even if it is designated by the number, etc., it is only necessary to be configured to determine whether the terminal 10 is included in this.

  If the determination result in step S12 is “NO”, the process returns to step S11 to receive the wave stop information again. On the other hand, when the determination result of step S12 is “YES”, the control unit 15 acquires the current time from the clock unit 18 (step S13). Next, the control unit 15 calculates a difference between the stop time stored in the stop information field F11 and the current time acquired in Step S13 (Step S14), and the time indicated by the difference is a predetermined time ( It is determined whether or not it is for example one month (step S15).

  If the determination result in step S15 is “YES”, the control unit 15 stores information indicating that the base station 20 is scheduled to stop (step S16), and ends the process of the flowchart shown in FIG. . That is, when the time indicated by the difference calculated in step S14 is a long time, only the fact that the wave is scheduled to be stopped is stored without performing any special processing, and the processing is terminated. Here, when storing as having a planned stoppage, for example, an excessive load of the control unit 15 is set such that a very long timer is set and the timer is constantly monitored even though the stoppage is scheduled for a long time. Even a small amount can be reduced. In addition, when storing the presence of a stoppage plan, the stoppage information may be stored together. In this case, after that, a routine for checking whether or not there is a plan to stop the wave is stored at a predetermined time interval such as one month in a routine different from the routine shown in FIG. Thereafter, when it is confirmed in this confirmation routine that there is a planned stoppage, the subsequent processing when the determination result in step S15 in FIG. Similar processing is performed. Further, when other stop information is received, it is confirmed in step S12 that there is a stop plan, and the stored stop information is read out, so that the subsequent processing is stopped. The prepared process can be executed.

  On the other hand, when the determination result of step S15 is “NO”, the control unit 15 calculates an offset according to identification information (unique information) assigned in advance to the terminal 10 (step S17). Here, the offset defines how much the radio signal transmitted from the base station 20 is switched from that time to access the base station 20 when the frequency band is switched. The amount to be. When the frequency band is switched, if access from a plurality of terminals 10 to the base station 20 occurs at the same time, a congestion state is caused. Therefore, an offset for shifting the access timing to the base station 20 is used from the viewpoint of preventing this. Calculated. Here, the identification information of the terminal 10 is a terminal ID, a telephone number, or the like that is inherently assigned to the terminal 10 and is written in the storage unit 17. When the control unit 15 determines the offset value, For example, if the identification information is determined to be positive or negative depending on whether the identification information is odd or even, or if the numerical value at the end of the identification information is extracted and used as an offset value, etc. The number of terminals can be allocated.

  When the above process is completed, the control unit 15 sets a time obtained by adding the offset calculated in step S17 to the time indicated by the difference calculated in step S14 in the timer 16 (step S18). As a result, the timing of the time until the stop time with the offset added is started. Next, the control unit 15 determines whether “stop wave change” is stored as a status in the field F14 of the received wave stop information (step S19). If the determination result is “NO”, it is determined whether or not “forced return” is stored as a status in the field F14 of the received stop information (step S20).

  When the determination result of step S20 is “NO”, the control unit 15 determines whether or not the time measurement by the timer 16 has ended (whether or not it is time-out) (step S21). When it is not time-out (when the determination result is “NO”), the process returns to step S19. On the other hand, when it is time-out (when the determination result is “YES”), the control unit 15 sets the timing for switching the search system by the wireless communication unit 11 (step S22). Here, the timing for switching the search system includes immediately regardless of the state of the terminal 10, at the end of the call, at the time of intermittent test to the channel, at the time of search before location registration, at the time of handover to switch base stations, and the like. The control unit 15 selects one of these timings according to the state of the terminal 10 and sets the timing for switching the search system.

  When the above setting is completed, the control unit 15 stores the flag in the flag storage unit 17 and sets the flag (step S23). The search system is changed by storing the flag in the flag unit 17. After the flag is set in step S23, the search in the current frequency band (old 800 MHz band) is not performed, and the search in the new frequency band (new 800 MHz band) and other frequency bands (2 GHz band) is performed. Is called. That is, a change process is performed in which the first search system that searches for the first communication system (old 800 MHz band) is changed to the second search system that does not search for the first communication system (old 800 MHz band).

  As the first search system, not only the first communication system (old 800 MHz band) but also the second communication system (new 800 MHz band) and the third communication system (2 GHz band) were searched. In this case, the second search system is a system that searches the second communication system (new 800 MHz band) and the third communication system (2 GHz band). Further, when the search system is assigned a priority order for searching for each communication system, the priority of the first communication system (the old 800 MHz band) in the second search system is compared with the first search system as change processing. A system for searching except for the first communication system can also be realized by the control of lowering the rank.

  On the other hand, after setting the timer 16 in step S18, when it is determined that “stop change” is stored as the status in the field F14 of the stop information received by the control unit 15 (the determination result in step S19 is “YES”). ”), The control unit 15 calculates the difference between the stop time stored in the field F11 of the stop information and the current time acquired from the clock unit 18 and calculates the offset (step S17). ). And the time which added the offset calculated by step S17 to the time shown by the calculated difference is set to the timer 16, and time-measurement is started again (step S18).

  In addition, after setting the timer 16 in step S18, when it is determined that “forced return” is stored as the status in the field information F14 of the stop information received by the control unit 15 (the determination result in step S20 is “YES”). In this case, the control unit 15 refers to the flag storage unit 17 to determine whether or not a flag is set (step S24). If this determination is “NO”, the flow returns to step S11. On the other hand, if the determination result in step S24 is “YES”, the flag stored in the flag storage unit 17 is canceled (step S25), and the process returns to step S11. When the flag once set is canceled by such processing, search is performed in both the current frequency band (old 800 MHz band), the new frequency band (new 800 MHz band), and other frequency bands (2 GHz band). The search system is changed to the first search system (return processing is performed).

  In addition, the stop information including such a forced return includes a new frequency band (second communication system (new 800 MHz band)) and other frequency bands (third It is desirable to transmit using a communication system (2 GHz band). By doing so, even if there is a terminal that does not carry in the current frequency band (first communication system (old 800 MHz band)) for some reason, the current frequency band (first 1 communication system (formerly 800 MHz band)) can be notified without giving it.

  Next, the operation of the terminal 10 when the terminal 10 located in the planned stoppage area where the stoppage is scheduled or in the area where the stoppage is performed moves to the unstopped area will be described. still. The non-stop area here means that the frequency band is not switched and the current frequency band (old 800 MHz band), that is, the area where radio signals are transmitted and received using the first communication system. Say. FIG. 4 is a flowchart illustrating an example of control performed by the control unit 15 when the terminal 10 moves to an unstopped area.

  When the terminal 10 moves to the non-stop area, the control unit 15 controls the wireless communication unit 11 to perform standby processing in a new frequency band (new 800 MHz band) (step S31). Next, the control unit 15 determines whether standby processing in a new frequency band (new 800 MHz band) is possible (step S32). If the determination result is “YES”, the series of processing ends.

  On the other hand, when the determination result in step S32 is “NO” (when standby processing in a new frequency band (new 800 MHz band) is impossible), the control unit 15 includes a non-stop area in the vicinity. It is determined whether or not there is (step S33). Here, the base station 20 transmits a base station information table, which is information related to neighboring base stations. The control unit 15 determines whether or not there is an unstopped area in the vicinity based on the contents of the base station information table.

  FIG. 5 is a chart showing an example of the contents of the base station information table. As shown in FIG. 5, the base station information table includes a plurality of records R1 to R4, and each record stores information on base stations located around the base station 20. Each of the records R1 to R4 includes four fields F21 to F24. The field F21 stores base station information for identifying a base station assigned to each base station. For example, “a0” is stored as the base station information in the field F21 of the record R1.

  In the field F22, Band Class indicating the frequency band being used is stored. If “6” is stored in this field F22, it means that the 2 GHz band is used. If “0” is stored, a new frequency band (new 800 MHz band) is used. When “3” is stored, it means that the current frequency band (old 800 MHz band) is used. For example, “3” is stored as the Band Class in the field F22 of the record R1. Information relating to the pilot signal being used is stored in the field F23. In the field F24, the aforementioned stop information is stored. For example, “scheduled to stop” is stored as stop information in the field F24 of the record R1, and no stop information is stored in the field F24 of the record R2.

  If it is determined that there is no unstopped area in the vicinity based on the contents of the base station information table (when the determination result is “NO”), the current state is maintained and the process returns to step S31. On the other hand, when it is determined that there is a non-stop area of the communication system (frequency band / band class) that can be supported by the radio unit of the terminal based on the content of the base station information table (the determination result is “YES” In the case of "", a search is performed in the communication system, that is, in the current frequency band (old 800 MHz band) (step S34). When the base station information table shown in FIG. 5 is transmitted, since the stop information of Band Class 3 (that is, the current frequency band) is not stored in the field F24 of the record R2, the control unit 15 Judge that there are unstopped areas in the vicinity.

  Next, the control unit 15 determines whether there is a pilot signal having a level equal to or higher than a predetermined threshold value set in advance based on the search result in step S34 (step S35). When the determination result is “YES”, the wireless signal can be communicated in the current frequency band (old 800 MHz band), so the control unit 15 stops the timer 16 and stores it in the flag storage unit 18. The flag is released (step S36). When the flag is canceled, the search system is changed to search in all frequency bands of the current frequency band (old 800 MHz band), the new frequency band (new 800 MHz band), and other frequency bands (2 GHz band). Is done. On the other hand, if the determination result in step S35 is “NO”, a timer (for example, 10 minutes) for the next standby process is set (step S37), and the process returns to step S31.

  As described above, according to the present embodiment, when the stop information from the base station 20 is received, a timer is set based on the stop information, and the time until the stop time is counted by this timer. Since the search system for the channel stopped at the time is changed, the useless search by the terminal 10 is reduced, the time required for the search is reduced, and the useless power consumption of the terminal 10 is suppressed. it can.

  The wireless terminal device, the control method thereof, and the wireless base station device according to one embodiment of the present invention have been described above. However, the present invention is not limited to the above-described embodiment, and can be freely changed within the scope of the present invention. It is. For example, in the above embodiment, when the stop information is not stored in the field F24 of the base station information table shown in FIG. 5, the control unit 15 determines that there is an unstopped area in the vicinity. It may be determined that there is an unstopped area in the vicinity even when there is a stoppage plan stored in the field F24. In other words, there is a possibility that the wave will stop in the future, but if there is a base station that transmits and receives radio signals in the current frequency band (formerly 800 MHz band) at that time, You may judge that there is.

  Note that the present invention has been described in the case where the communication system is divided into frequency bands. However, the present invention is not limited to this, and code division is required if channel acquisition is required. However, it goes without saying that the present invention can also be applied to communication systems having physically different carrier wave formats.

It is a block diagram which shows schematic structure of a radio | wireless communications system provided with the radio | wireless terminal apparatus and radio | wireless base station apparatus by one Embodiment of this invention. 4 is a diagram illustrating an example of stop information transmitted from a base station 20. FIG. 7 is a flowchart illustrating an example of control performed by the control unit 15 of the terminal 10 when receiving stop information whose status is scheduled to stop. It is a flowchart which shows an example of the control performed by the control part 15 when the terminal 10 moves to a non-stop area. It is a chart which shows an example of the contents of a base station information table.

Explanation of symbols

10 terminal 11 radio communication unit 15 control unit 16 timer 20 base station 21 radio unit 22 control unit

Claims (14)

A wireless communication unit capable of transmitting and receiving wireless signals in a plurality of communication systems;
A controller that searches a plurality of channels of each of the plurality of communication systems based on a predetermined search system,
The controller is
When the wireless communication unit receives the stop information indicating the stoppage of the wireless signal in the first communication system, the stoppage schedule is based on the stop information and unique information preset in the own device. Execute wave stop setting process to set the time ,
When the scheduled stop time is reached, the predetermined search system is changed from the first search system that performs the search including the channel of the first communication system to the first search system that does not include the channel of the first communication system. A wireless terminal apparatus capable of executing a change process for changing to a two-search system. A wireless communication unit capable of transmitting and receiving wireless signals in a plurality of communication systems;
A controller that searches a plurality of channels of each of the plurality of communication systems based on a predetermined search system,
The controller is
The wave-stopping scheduled transmission of the radio signal in the first communication system, received by the wireless communication unit as a wave-stopping information together with the identification information of the local information or base station areas where wave-stopping takes place, and the device itself the If the base station in the area indicated by the area information or communicating with the radio unit is the base station indicated by the identification information, the stop time for setting the scheduled stop time is set based on the stop information. Execute wave setting process
When the scheduled stop time is reached, the predetermined search system is changed from the first search system that performs the search including the channel of the first communication system to the first search system that does not include the channel of the first communication system. A wireless terminal apparatus capable of executing a change process for changing to a two-search system. With a timer
The stop information includes scheduled time information indicating a scheduled stop date and / or a scheduled time,
The stop wave setting process performs the setting of the timer based on the scheduled time information,
The changing process, the wireless terminal device according to claim 1 or claim 2 wherein the timer the set time is characterized by being performed by counting. The stop information includes stop change information indicating a planned change of the stop,
Wherein, when receiving the wave-stopping change information, any of claims 1 to 3, characterized in that the setting can be changed further process the execution of changing the settings at the time of the wave-stopping will wireless terminal according to an item or. The wave stop information includes forced return information indicating that the wave stop or the wave stop schedule is canceled,
2. The control unit according to claim 1, wherein when the forced return information is received, the control unit can execute a return process for returning the predetermined search system from the second search system to the first search system. The wireless terminal device according to claim 4 . Wherein, the addition to the wave-stopping information, according to a preset unique information to the own device, according to claim 2, characterized in that to set the time of the wave-stopping expected in the wave-stopping setting process Wireless terminal device. The wireless terminal apparatus according to claim 3, wherein the control unit does not set the timer if the stop information exceeds a predetermined time when the stop information is received. 8. The control unit according to claim 1, wherein when the channel is not found by a search in the second search system, the control unit performs a search in the first search system. The wireless terminal device described in 1. The control unit according to any one of claims 1 to 8, wherein the control unit performs a search by the first search system when there is a radio base station that is not scheduled to stop around the radio terminal device. The radio | wireless terminal apparatus as described in any one. The said control part returns to the said 1st search system, when it can stand by in the said 1st communication system after changing to the said 2nd search system. The wireless terminal device according to claim 9. In a control method for a wireless terminal device, comprising: a wireless communication unit capable of transmitting and receiving wireless signals in a plurality of communication systems; and a control unit that searches a plurality of channels of each of the plurality of communication systems based on a predetermined search system ,
A first search step for performing a search including a channel of the first communication system;
A second search step for performing a search without including a channel of the first communication system;
Receiving, by the wireless communication unit, stop information indicating a stoppage schedule of the wireless signal in the first communication system;
Setting a scheduled stop time based on the stop information and unique information preset in the device itself; and
And a step of changing the predetermined search system from the first search step to the second search step when the scheduled stop time is reached . In a control method for a wireless terminal device, comprising: a wireless communication unit capable of transmitting and receiving wireless signals in a plurality of communication systems; and a control unit that searches a plurality of channels of each of the plurality of communication systems based on a predetermined search system ,
A first search step for performing a search including a channel of the first communication system;
A second search step for performing a search without including a channel of the first communication system;
Receiving by the wireless communication unit the stoppage schedule of the wireless signal in the first communication system as stoppage information together with area information or identification information of a base station where the stoppage is performed ;
When the own apparatus is in the area indicated by the area information, or when the base station in communication by the radio unit is the base station indicated by the identification information, the scheduled stop time based on the stop information Steps to set
And a step of changing the predetermined search system from the first search step to the second search step when the scheduled stop time is reached . The radio base station apparatus includes a radio unit is connected to a communication network that mediates communication for transmitting and receiving radio signals between the mobile station apparatus using channels with a plurality of communication systems,
The wave-stopping schedule of the radio signal in one first communication system is one of the plurality of frequency bands, the first as a wave-stopping information together with the identification information of the local information or base station areas where wave-stopping is performed A control unit that transmits by a communication system including the communication system of
The radio base station apparatus, wherein the control unit transmits the stop information when information about the stop of the first communication system is notified from the communication network . When transmitting the forced return information indicating that either the stop or the scheduled stop of the wave is canceled , the control unit transmits the transmission to the radio unit at least differently from the first communication system. The radio base station apparatus according to claim 13, wherein the radio base station apparatus is performed in a system including two communication systems.

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