JP6201257B2 - Base station apparatus, mobile station apparatus, and radio communication method - Google Patents

Description

  The present invention relates to a technology in which a mobile station apparatus and a base station apparatus perform CA (Career Aggregation) communication.

  The 3GPP (3rd Generation Partnership Project) is currently studying specifications for LTE-A (Long Term Evolution-Advanced). In LTE-A, it is required to realize higher-speed communication than LTE. For this reason, LTE-A is determined to support a wider band than LTE (band exceeding the 20 MHz band of LTE and up to 100 MHz).

  In LTE-A, a carrier aggregation (CA) technology is adopted for the purpose of maintaining compatibility with LTE as much as possible. The carrier aggregation technology uses a plurality of frequency bands up to a bandwidth of 20 MHz called a component carrier (CC: Component Carrier), and secures a bandwidth of up to 100 MHz by performing communication collectively, thereby achieving high speed and large capacity. It is a technology that realizes communication.

  Among a plurality of component carriers, a CC that transmits PUCCH is a PCC (Primary Component Carrier), and a CC other than the PCC that does not transmit PUCCH is an SCC (Secondary Component Carrier).

  When the amount of data communication decreases during CA communication using a plurality of frequency bands, the use of the SCC frequency band is stopped and communication is continued only with the PCC. At this time, the SCC disconnection process (Deactivation) is defined in Non-Patent Documents 1 and 2.

  FIG. 3 is a diagram illustrating a lapse of time from the start of CA until the SCC is disconnected. When the base station apparatus determines that the data communication amount is reduced during the CA communication and the SCC is to be disconnected (deactive state), the mobile station apparatus receives a SCC disconnection request (deactivation command) after a certain period of time has elapsed. ). When receiving the SCC disconnection request (Deactivation command), the mobile station apparatus operates the SCC timer Deactivation Timer in the mobile station apparatus, and further disconnects the SCC after 8 subframes when the preset Deactivation Timer expires.

  In this case, the base station apparatus side determines that the data communication amount is reduced and the CA communication is stopped, notifies the mobile station apparatus of the Deactivation command, the mobile station apparatus receives the Deactivation Command, and the mobile station apparatus in advance. Until the set timer time (Deactivation Timer) expires, the SCC remains in communication (Activation).

Japanese Patent No. 5053409

3GPP 36.321 Chapter 5.13 Activation / Deactivation of SCells 3GPP 36.213 Chapter 4.3 Timing for Secondary Cell Activation / Deactivation

  Here, the SCC maintains a connected state (Activation) for a certain period of time until the notification timer of the base station apparatus and the Deactivation Timer of the mobile station apparatus expire regardless of whether or not packet communication is performed. The state in which the SCC is connected (Activation) is a state in which the power consumption is large, and maintaining this state for a certain period of time may deteriorate the battery life of the mobile station apparatus. That is, the SCC of the mobile station apparatus increases in the activation state until the Deactivation Timer expires after the base station apparatus determines that the amount of data communication is reduced and cancels CA. For example, when the user is not using the mobile station device (display is OFF), there is a low possibility that a large amount of packet communication sufficient for CA communication will occur continuously, and SCC is consumed for a long time. Keeping high power for a certain period of time is useless.

  That is, even during the CA communication, even if the base station apparatus decides to put the SCC in the Deactive state due to a decrease in the amount of data communication, the Mobile Station apparatus remains in the Activation state for a certain period of time. The current consumption of the device increases.

  The present invention has been made in view of such circumstances, and a base station device that performs control for reducing power consumption of a mobile station device by shortening the duration of an SCC, and a mobile station device, An object is to provide a wireless communication method.

  In order to achieve the above object, the present invention takes the following measures. That is, the base station apparatus of the present invention is a base station apparatus that performs CA (Career Aggregation) communication with a mobile station apparatus, and makes a CA communication request to the mobile station apparatus, while internal information is transmitted from the mobile station apparatus. After the start of CA communication with the base station communication unit that receives the mobile station apparatus, it is determined whether or not CA communication is unnecessary according to the amount of data communication with the mobile station apparatus. As a result of the determination, CA communication is not required. In this case, the time from when it is determined that CA communication is not required based on the internal information of the mobile station device to when the mobile station device is requested to disconnect the SCC (Secondary Component Carrier) is set as a base station timer. A base station control unit to be set, and after the time set in the base station timer expires, an SCC disconnect request is made to the mobile station apparatus.

  Thus, based on the internal information of the mobile station apparatus, the time from when it is determined that CA communication is unnecessary until the mobile station apparatus is requested to disconnect the SCC is set in the base station timer. Since the SCC disconnection request is made to the mobile station device after the set time has expired, for example, when the internal information indicates that the power consumption of the mobile station device should not be kept high, A time shorter than the set time can be set in the base station timer, and the power consumption of the mobile station apparatus can be reduced.

  According to the present invention, a time shorter than a preset time can be set in the base station timer, and the power consumption of the mobile station apparatus can be reduced.

It is a block diagram which shows schematic structure of the base station apparatus which concerns on 1st Embodiment. It is a block diagram which shows schematic structure of the mobile station apparatus which concerns on 1st Embodiment. It is a figure which shows the time passage after SCC is cut | disconnected from the CA start. It is a sequence chart which shows the procedure of the radio | wireless communication of a mobile station apparatus and a base station apparatus. It is a flowchart which shows operation | movement of the base station apparatus which concerns on 1st Embodiment. 3 is a flowchart showing an operation of the mobile station apparatus according to the first embodiment. It is a figure which shows operation | movement of the time passage of a mobile station apparatus when a mobile station apparatus notifies state notification "1" to a base station apparatus. 6 is a flowchart showing an operation of a mobile station apparatus according to a modification of the first embodiment. It is a sequence chart which shows the procedure of the radio | wireless communication of a mobile station apparatus and a base station apparatus. 6 is a flowchart showing an operation of the mobile station apparatus according to the second embodiment. It is a flowchart which shows operation | movement of the base station apparatus which concerns on 2nd Embodiment. It is a sequence chart which shows the procedure of the radio | wireless communication of the mobile station apparatus and base station apparatus which concern on 3rd Embodiment. It is a figure which shows PCC / SCC time passage of the mobile station apparatus in LCD_OFF. 10 is a flowchart showing an operation of the mobile station apparatus according to the third embodiment. It is a flowchart which shows operation | movement of the mobile station apparatus which concerns on 5th Embodiment.

(First embodiment)
In the first embodiment, the internal information of the mobile station device is notified to the base station device in advance, and the base station device is unlikely to generate a sufficiently large amount of packet communication sufficient for CA communication. Sometimes, based on the internal information of the mobile station apparatus, a method for notifying the mobile station apparatus of the Deactivation command earlier than usual and reducing the time of the activation state of the mobile station apparatus will be described.

  FIG. 1 is a block diagram illustrating a schematic configuration of a base station apparatus according to the first embodiment. Base station apparatus 10 performs CA (Career Aggregation) communication with a mobile station apparatus. The base station communication unit 11 makes a CA communication request to the mobile station device, and receives internal information from the mobile station device. After starting the CA communication, the base station control unit 13 determines whether or not the CA communication is unnecessary according to the amount of data communication with the mobile station apparatus. As a result of this determination, if the CA communication is no longer required, an SCC (Secondary Component Carrier) disconnect request is issued to the mobile station device from the time when the CA communication is determined to be unnecessary based on the internal information of the mobile station device. The base station timer 15 is set to the time until Then, after the time set in the base station timer 15 expires, the base station device 10 makes an SCC disconnect request to the mobile station device.

  The base station control unit 13 sets the base station timer 15 to a time shorter than a preset time when the internal information indicates that the power consumption of the mobile station device should not be kept high, for example. Set.

  FIG. 2 is a block diagram showing a schematic configuration of the mobile station apparatus according to the first embodiment. The mobile station apparatus 20 performs CA (Career Aggregation) communication with the base station apparatus. The mobile station communication unit 21 receives a CA communication request from the base station device. The mobile station control unit 23 detects internal information indicating the internal state of the own device, and notifies the detected internal information to the base station device via the mobile station communication unit 21. The mobile station timer 25 sets the time from when the SCC disconnection request is received until the SCC disconnection is performed.

  When starting the CA communication, the mobile station device 20 notifies the base station device 10 of the internal information of the mobile station device 20. When the base station apparatus 10 receives the internal information of the mobile station apparatus 20, the base station apparatus 10 changes the timing of performing the SCC Deactivation command notification based on the information. Hereinafter, an example in which the base station apparatus 10 sets the SCC activation time of the mobile station apparatus 20 will be described.

  The mobile station device 20 notifies the mobile station device internal information at the start of CA communication, and the base station device 10 changes the timing for notifying the SCC disconnection request (Deactivation command) based on the information. Here, a case where “display state” is notified as internal information of the mobile station device 20, for example, a case where the display is ON or OFF will be described.

  FIG. 4 is a sequence chart showing a procedure of wireless communication between the mobile station apparatus and the base station apparatus. First, in the MAC_Mainconfig message, a timer setting Deactivation Timer until SCC disconnection is set in advance (1). Actually, the parameter “sCellDeactivationTimer-r10” is notified to the mobile station apparatus in the MAC-Main-Config message. At this stage, data communication using only PCC (Primary Componet Carrier) is executed. Next, the base station apparatus makes a CA communication request at a certain time (2). When receiving the CA communication request, the mobile station apparatus confirms the display state (internal information) of the mobile station apparatus (3). When the display is ON, “0” is notified, and when the display is OFF, “1” is notified (4). CA data transmission / reception is started using a plurality of frequency bands of PCC / SCC (5).

  If the base station apparatus determines that the amount of data communication decreases and that CA communication is not necessary, the base station apparatus receives an SCC disconnection request (deactivation command) based on the internal information (status notification information) of the mobile station apparatus received in (4). ) Is changed (6). When the status display of (4) is “1”, an SCC disconnection request (Deactivation command) is immediately notified. That is, the notification timer of the base station apparatus is not operated. Alternatively, a notification timer shorter than usual is set, and when the notification timer expires, an SCC disconnection request is notified. When the status display of (4) is “0”, the conventional notification timer is operated, and after a predetermined time has elapsed, an SCC disconnection request (deactivation command) is notified. When the status display is “0”, the conventional operation is maintained. The base station apparatus notifies the mobile station apparatus of an SCC disconnection request using PCC (7). When receiving the SCC disconnection request, the mobile station device operates the Deactivation Timer, and sets the SCC to the Deactive state when the Timer expires (8).

  FIG. 5 is a flowchart showing the operation of the base station apparatus according to the first embodiment. First, a MAC_Mainconfig message is notified to the mobile station device (step S1). Next, a CA communication request is notified (step S2). Internal information (status notification) is received from the mobile station apparatus (step S3), and CA communication is started (step S4). Next, it is determined whether or not CA communication should be terminated (step S5). It is determined whether or not the status notification from the mobile station apparatus received in step S3 is 1 (step S6). If it is 1, 0 or a time shorter than normal is set in the notification timer and operated ( Step S7) and the process proceeds to step S9. On the other hand, if the status notification from the mobile station is not 1 in step S6, the conventional notification timer is activated (step S8). When the timer expires (step S9), an SCC disconnection request is notified to the mobile station device (step S10), and the process ends.

  Thus, the base station apparatus changes the notification timing of the SCC disconnection request signal based on the mobile station apparatus internal information. When the status display of the mobile station apparatus is “1”, the notification timer value is set to zero, and an SCC disconnection request is immediately notified. Alternatively, when the notification timer value is set to a time shorter than usual and the notification timer expires, an SCC disconnection request is immediately notified. When the status display of the mobile station apparatus is “0”, the notification timer is operated as before, and the SCC disconnection request is notified after a certain period of time. In short, the notification timer value of the base station apparatus is changed according to the status display of the mobile station apparatus, and the timing for notifying the mobile station apparatus of the SCC disconnection request (Deactivation command) is changed.

  FIG. 6 is a flowchart showing the operation of the mobile station apparatus according to the first embodiment. A MAC_Mainconfig message is received from the base station apparatus (step S101), and a CA communication request is received (step S102). Next, the state of the own device is confirmed, and internal information is extracted (step S103). It is determined whether or not the display state is OFF (step S104). If the display state is OFF, "1" is output as a state notification (step S105), and the process proceeds to step S107. On the other hand, if the display state is not OFF in step S104, “0” is output as a state notification (step S106), and CA communication is started (step S107). When the SCC disconnection request is received from the base station apparatus (step S108), the SCC is set to the Deactive state (step S109) and the process ends.

  As described above, when the mobile station apparatus receives the CA communication request from the base station apparatus, the mobile station apparatus checks the internal state of the mobile station apparatus, and notifies the base station apparatus of the state notification “0” when the display is ON. To do. When the display is OFF, status notification “1” is notified.

  FIG. 7 is a diagram illustrating the operation of the mobile station apparatus over time when the mobile station apparatus notifies the base station apparatus of status notification “1”. 7 is compared with FIG. 3, it can be seen that the activation time of the SCC is shortened and the power consumption of the mobile station apparatus can be reduced.

(Modification of the first embodiment)
In the first embodiment, whether the display is on or off is used as a determination factor as the cause of the internal information of the mobile station device, but the status notification is notified based on the internal information of the mobile station device different from the display. May be. For example, the status notification may be performed based on other factors such as the operation state of WiFi, the amount of audio data, and the remaining battery information.

  Here, a case will be described in which state notification is performed to the base station apparatus using WiFi operating state as a factor. When WiFi of the mobile station apparatus is used, status notification “0” is notified, and when WiFi is not used, status notification “1” is notified.

  FIG. 8 is a flowchart showing the operation of the mobile station apparatus according to the modification of the first embodiment. A MAC_Mainconfig message is received from the base station apparatus (step S111), and a CA communication request is received (step S112). Next, the state of the own device is confirmed, and internal information is extracted (step S113). It is determined whether or not the Wi-Fi state is OFF (step S114). If it is OFF, “1” is output as a state notification (step S115), and the process proceeds to step S117. On the other hand, if the Wi-Fi state is not OFF in step S104, “0” is output as a state notification (step S116), and CA communication is started (step S117). When the SCC disconnection request is received from the base station apparatus (step S118), the SCC is set to the Deactive state (step S119), and the process ends.

  As described above, when the WiFi of the mobile station device is not used, the status display is notified to the base station device, the notification timer value is set to zero, and the SCC disconnection request is immediately notified. Alternatively, when the notification timer value is set to a time shorter than usual and the notification timer expires, an SCC disconnection request is immediately notified. When the WiFi of the mobile station device is used, the status display is notified of “0”, and the base station device operates the notification timer as usual and notifies the SCC disconnection request after a certain period of time. .

  The characteristic of 1st Embodiment is changing the notification timer value of a base station apparatus according to the status display of a mobile station apparatus, and changing the timing which notifies a SCC disconnection request (Deactivation command) to a mobile station apparatus. For example, when notifying based on the amount of audio data, if it is determined that the amount of audio data is large because a high quality voice call is made, it is determined that the amount of audio data is small due to status notification “0”, low quality audio communication, etc. In this case, status notification “1” is notified.

  In general, when CA communication is started, the amount of data communication is expected to be large or when the amount of data communication is actually large, a status notification “0” is notified, and the amount of data communication is small at the start of CA communication. When the amount of data communication is actually low, the base station device can set the notification timer to zero or a notification timer time shorter than before by notifying the status notification “1”. , Deactivation command is notified to the mobile station apparatus earlier than before. When the mobile station apparatus receives the Deactivation command, the activation time can be shortened and the power consumption is reduced.

  When the remaining battery level is used as internal information, if the remaining battery level is high, a status notification “0” is notified and a conventional notification timer is set. When the remaining battery level becomes low, the state notification “1” is notified, the notification timer is set to zero or a notification timer time shorter than the conventional one, and the Deactivation command is notified to the mobile station device earlier than the conventional one.

  The following table shows example items for determining internal information of the mobile station apparatus.

  Note that the status notification from the mobile station apparatus is not limited to binary, but may be a value of 3 or more. When the value is 3 or more, Fast, Middle Slow, etc., specifically, the base station apparatus that has received Fast sets the notification timer value to 0 seconds, and the base station apparatus that has received Middle receives the notification timer value. May be set to any one of 5 to 10 seconds, and the base station apparatus that has received Slow may set the notification timer value to any one of 10 to 20 seconds.

(Second Embodiment)
In the first embodiment, the mobile station apparatus performs state notification, and the base station apparatus sets the notification timer value until the Deactivation command notification based on the state notification. However, in the second embodiment, the mobile station apparatus A case will be described in which the station device takes the initiative to determine the notification timer setting value.

  In FIG. 2, the mobile station control unit 23 detects internal information indicating the internal state of its own device, and based on the detected internal information, the base station device determines that CA communication is unnecessary and The base station timer setting value indicating the time until the SCC disconnection request is output. And the mobile station communication part 21 transmits a base station timer setting value to a base station apparatus.

  FIG. 9 is a sequence chart showing a procedure of wireless communication between the mobile station device and the base station device. (1) to (3) are the same as in the first embodiment. In this embodiment, the part for notifying the notification timer set value is different in the state notification of (4). First, in the MAC_Mainconfig message, a timer setting Deactivation Timer until SCC disconnection is set in advance (1). Actually, the parameter “sCellDeactivationTimer-r10” is notified to the mobile station apparatus in the MAC-Main-Config message. At this stage, data communication using only PCC (Primary Componet Carrier) is executed. Next, the base station apparatus makes a CA communication request at a certain time (2). When receiving the CA communication request, the mobile station apparatus confirms the display state of the mobile station apparatus (3). The mobile station apparatus determines a notification timer set value based on the internal information, and notifies the base station apparatus of the set timer value (4). Next, CA data transmission / reception is started using a plurality of frequency bands of PCC / SCC (5). If the base station apparatus determines that the amount of data communication is reduced and that CA communication is not necessary, the base station apparatus operates the notification timer based on the notification timer setting value received in (4) (6). The base station apparatus notifies the mobile station apparatus of an SCC disconnection request using PCC (7). When receiving the SCC disconnection request, the mobile station device operates the Deactivation Timer, and sets the SCC to the Deactive state when the Timer expires (8).

  FIG. 10 is a flowchart showing an operation of the mobile station apparatus according to the second embodiment. A MAC_Mainconfig message is received from the base station apparatus (step S201), and a CA communication request is received (step S202). Next, the state of the own device is confirmed, and internal information is extracted (step S203). And the value of the notification timer in a base station apparatus is determined (step S204). The extracted timer value is notified to the base station apparatus (step S205). Next, CA communication is started (step S206). When the SCC disconnection request is received from the base station apparatus (step S207), the SCC is set to the Deactive state (step S208) and the process ends.

  FIG. 11 is a flowchart showing an operation of the base station apparatus according to the second embodiment. The mobile station apparatus is notified of a MAC_Mainconfig message (step S301), and a CA communication request is notified (step S302). Next, a notification timer value is received from the mobile station apparatus (step S303), and CA communication is started (step S304). Next, the end of CA communication is determined (step S305). If it is determined that CA communication is to be ended, a notification timer is activated (step S306). When the timer expires (step S307), the mobile station apparatus is notified of an SCC disconnection request (step S308) and ends.

  Thus, the base station device operates the notification timer based on the notification timer value from the mobile station device, and performs SCC disconnection request notification when the timer expires. That is, the mobile station device takes the lead in the SCC activation state based on the internal information of the mobile station device, for example, information such as the amount of data communication, the remaining battery level, the presence of WiFi operation, display ON / OFF, etc. It becomes possible to set a short time. Instead of setting the time, numbers such as the number of frames and the number of subframes may be notified. In the first embodiment, the mobile station apparatus performs state notification. However, the second embodiment is characterized in that time is set as a specific number and notified.

(Third embodiment)
In the first embodiment and the second embodiment, the notification timer value is determined by the base station device or the mobile station device based on the internal information of the mobile station device, and when the notification timer expires, the SCC disconnection request It has been explained that the base station apparatus notifies the mobile station apparatus of (Deactivation command). In the third embodiment, a description will be given of a method for setting the next deactivation timer to be shortened in the mobile station apparatus that has received the deactivation command.

<How to check the display>
When receiving the SCC Deactivation request for CA communication, if the display state is confirmed and it is determined that the display is OFF, the SCC Deactivation response is notified to the base station apparatus without waiting for the Deactivation Timer of the mobile station apparatus. The control method to perform is demonstrated.

  FIG. 12 is a sequence chart illustrating a procedure of wireless communication between the mobile station apparatus and the base station apparatus according to the third embodiment. First, a timer setting Deactivation Timer until SCC disconnection is set in advance by a MAC_Mainconfig message by the base station apparatus (1). Actually, the parameter “sCellDeactivationTimer-r10” is notified to the mobile station apparatus in the MAC-Main-Config message. At this stage, data communication using only PCC (Primary Componet Carrier) is executed. Next, CA communication is started (2). Then, data transmission / reception is started using a plurality of frequency bands of PCC / SCC. If the base station apparatus determines that CA communication is not required, it notifies an SCC disconnection request (Deactivation command) (3). Here, the SCC disconnection request is notified to the mobile station apparatus using PCC. The mobile station apparatus receives the SCC disconnection request. Next, the mobile station apparatus confirms LCD_OFF / ON (4). When the mobile station apparatus determines that the SCC is unnecessary while the LCD_OFF is in effect, the SCC Deactivaton response is notified to the base station apparatus by the PCC (5). When the mobile station apparatus receives the ACK by PCC, it immediately sets the SCC to the Deactivation state (6).

  FIG. 13 is a diagram illustrating the PCC / SCC time lapse of the mobile station apparatus in the case of LCD_OFF. In the third embodiment, if LCD_ON, the Deactivation timer is operated according to the current 3GPP specifications, and the SCC is disconnected after the Timer expires (as shown in FIG. 3). In the case of LCD_OFF, as shown in FIG. 13, the power consumption can be suppressed by shortening the activation time of the SCC.

  FIG. 14 is a flowchart showing the operation of the mobile station apparatus according to the third embodiment. First, a Deactivation Timer is received (step S401), and CA communication is started (step S402). Next, when Deactivation is received (step S403), it is determined whether LCD_ON, that is, whether an operation is in progress (step S404). When it is not LCD_ON, that is, when LCD_OFF is not operating, a Deactivation response is made (step S405), and when an ACK is received from the base station apparatus (step S406), the process proceeds to step S409. On the other hand, in step S404, if LCD_ON, that is, if an operation is in progress, a deactivation timer is started (step S407). When the deactivation timer expires (step S408), the process proceeds to step S409. In step S409, SCC is deactivated after 8 Subframes, and the process ends.

(Fourth embodiment)
In the third embodiment, each control signal for performing Direction control of the SCC is performed by the PCC. However, in the sequence chart shown in FIG. 12, the control signals (5) and (6) are converted to the SCC using the SCC. Detection control may be performed. Communication control signals performed between the base station apparatus and the mobile station apparatus are the same as those in the third embodiment. In FIG. 12, the mobile station apparatus receives the SCC Detection request at the PCC (3). The mobile station apparatus confirms LCD_OFF / ON (4). When the mobile station apparatus determines that the SCC is unnecessary while the LCD_OFF is in effect, the SCC deactivation response is notified to the base station apparatus using the SCC (5). When the mobile station apparatus receives an ACK in SCC, it immediately sets the SCC to the Deactivation state (6). When the SCC receives the ACK signal of the Deactivation response signal, the SCC is switched from the Activation state to the Deactivation state.

(Fifth embodiment)
In the third embodiment and the fourth embodiment 4, the mobile station apparatus receives the SCC disconnection request (Deactivation command) (3), confirms the display state (4), and transmits a Deactivation response ( 5) Regardless of the display state, another state may be confirmed and the Deactivation response (5) may be notified. For example, the determination criterion may be whether the user has operated a button, a key operation unit, a touch panel unit, or the like.

  FIG. 15 is a flowchart showing the operation of the mobile station apparatus according to the fifth embodiment. First, a Deactivation Timer is received (step S501), and CA communication is started (step S502). Next, when Deactivation is received (step S503), it is determined whether or not an operation is in progress (step S504). If not in operation, a Deactivation response is made (step S505). When an ACK is received from the base station apparatus (step S506), the process proceeds to step S509. On the other hand, if the operation is being performed in step S504, the deactivation timer is started (step S507). When the deactivation timer expires (step S508), the process proceeds to step S509. In step S509, SCC is deactivated after 8 Subframes, and the process ends.

  The determination as to whether or not an operation has been performed may be made based on the state when the Deactivation command is received, or after receiving the Deactivation command, checking the state for 30 seconds by going back in time. May be.

(Modification of the fifth embodiment)
In addition to the display unit and the operation unit, the Deactivation Response (5) in FIG. 12 may be notified after confirming the state of other internal functions of the mobile station apparatus. The state of the internal function of the mobile station device is, for example, a WiFi function, a voice function, battery remaining amount information, or the like. In the case of the WiFi function, it is determined whether the WiFi function is used or not. If the WiFi function is not used, the SCC is immediately put into the Deactivation state, so the Deactivation response (5) may be notified immediately. . When the WiFi function is used, a predetermined time is elapsed until the Deactivation Timer expires, and the Deactivation state is set as before.

  Further, in the case of the battery remaining amount display, the Deactivation response (5) may be immediately notified in order to immediately bring the SCC into the Deactivation state when the remaining amount of the battery has decreased. When there is a remaining battery level, there is little need to immediately enter the Deactivation state, and as usual, after a certain time has passed until the Deactivation Timer expires, the Deactivation state is set.

  The present invention can also take the following aspects. (1) A base station apparatus of the present invention is a base station apparatus that performs CA (Career Aggregation) communication with a mobile station apparatus, and makes a CA communication request to the mobile station apparatus, while the mobile station apparatus After the CA communication is started, the base station communication unit that receives the internal information from the mobile station apparatus determines whether the CA communication is unnecessary according to the amount of data communication with the mobile station apparatus. If unnecessary, based on the internal information of the mobile station device, the time from when it is determined that CA communication is unnecessary until the mobile station device makes a SCC (Secondary Component Carrier) disconnect request is A base station controller configured to set a base station timer, and after the time set in the base station timer expires, the mobile station apparatus is requested to disconnect the SCC.

  (2) Moreover, in the base station apparatus of the present invention, the base station control unit is set in advance when the internal information indicates that the power consumption of the mobile station apparatus should not be maintained high, for example. The base station timer is set to a time shorter than a certain time.

  (3) The mobile station apparatus of the present invention is a mobile station apparatus that performs CA (Career Aggregation) communication with a base station apparatus, and a mobile station communication unit that receives a CA communication request from the base station apparatus, Internal information indicating the internal state of the device is detected, and based on the detected internal information, when the base station device determines that CA communication is unnecessary, a request for disconnecting an SCC (Secondary Component Carrier) is sent to the device itself. A mobile station control unit that outputs a base station timer setting value indicating a time until the transmission is performed, wherein the mobile station communication unit transmits the base station timer setting value to the base station device.

  (4) Moreover, the mobile station apparatus of the present invention is a mobile station apparatus that performs CA (Career Aggregation) communication with a base station apparatus, and receives a CA communication request or a SCC (Secondary Component Carrier) disconnection request from the base station apparatus. And when the mobile station communication unit receives the SCC disconnection request from the base station device after starting CA communication, detects internal information indicating the internal state of the device, and based on the detected internal information, A mobile station control unit that sets a time period from the reception of the SCC disconnection request to the disconnection of the SCC in the mobile station timer in the own device, and after the time set in the mobile station timer expires, Cutting is performed.

  (5) Moreover, the radio communication method of the present invention is a radio communication method in which a mobile station apparatus and a base station apparatus perform CA (Career Aggregation) communication, and the base station apparatus communicates with the mobile station apparatus. Performing a CA communication request, the mobile station device detecting internal information indicating an internal state of the mobile device, transmitting the detected internal information to the base station device, and the base station device performing CA communication. After starting, it is determined whether or not CA communication is unnecessary according to the amount of data communication with the mobile station device. If the result of the determination indicates that CA communication is not required, internal information of the mobile station device The time from when it is determined that CA communication is unnecessary until a request to disconnect the SCC (Secondary Component Carrier) to the mobile station device is set in a base station timer, and the base station device, The group A step of making an SCC disconnection request to the mobile station device after expiration of a time set in a station timer, and a step of disconnecting the SCC after the mobile station device receives the SCC disconnection request And at least.

  (6) With these configurations, a time shorter than a preset time can be set in the base station timer, and the power consumption of the mobile station apparatus can be reduced.

DESCRIPTION OF SYMBOLS 10 Base station apparatus 11 Base station communication part 13 Base station control part 15 Base station timer 20 Mobile station apparatus 21 Mobile station communication part 23 Mobile station control part 25 Mobile station timer

Claims (5)

A base station apparatus that performs CA (Career Aggregation) communication with a mobile station apparatus,
While making a CA communication request to the mobile station device, a base station communication unit that receives internal information from the mobile station device;
After starting CA communication, it is determined whether or not CA communication is unnecessary according to the amount of data communication with the mobile station device. If the result of the determination is that CA communication is no longer required, A base station control unit that sets, in a base station timer, a time from when it is determined that CA communication is unnecessary based on internal information to when the mobile station apparatus makes a SCC (Secondary Component Carrier) disconnection request; Prepared,
A base station apparatus that makes an SCC disconnection request to the mobile station apparatus after expiration of a time set in the base station timer.   The base station apparatus according to claim 1, wherein the base station control unit sets a time shorter than a preset time based on the internal information in the base station timer. A mobile station apparatus that performs CA (Career Aggregation) communication with a base station apparatus,
A mobile station communication unit that receives a CA communication request from the base station device;
Detects internal information indicating the internal state of the device itself, and based on the detected internal information, when the base station device determines that CA communication is not required, requests to disconnect the SCC (Secondary Component Carrier) from the device itself A mobile station controller that outputs a base station timer setting value indicating the time until
The mobile station communication unit transmits the base station timer set value to the base station device. A mobile station apparatus that performs CA (Career Aggregation) communication with a base station apparatus,
A mobile station communication unit that receives a CA communication request or an SCC (Secondary Component Carrier) disconnection request from the base station device;
After receiving the SCC disconnection request from the base station device after starting CA communication, it detects internal information indicating the internal state of its own device, and receives the SCC disconnection request based on the detected internal information. A mobile station control unit that sets a time until disconnecting the SCC in a mobile station timer in the own device,
A mobile station apparatus that disconnects an SCC after expiration of a time set in the mobile station timer. A wireless communication method in which a mobile station device and a base station device perform CA (Career Aggregation) communication,
The base station device making a CA communication request to the mobile station device;
The mobile station device detects internal information indicating an internal state of the mobile device, and transmits the detected internal information to the base station device;
When the base station apparatus determines whether or not CA communication is no longer necessary according to the amount of data communication with the mobile station apparatus after starting CA communication. The step of setting, in the base station timer, the time from when it is determined that CA communication is unnecessary based on the internal information of the mobile station device to when the mobile station device makes a SCC (Secondary Component Carrier) disconnection request. When,
The base station device, after expiration of the time set in the base station timer, to the mobile station device to request disconnection of SCC;
And a step of disconnecting the SCC after the mobile station apparatus receives the SCC disconnection request.

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