JP6422744B2 - Base station and radio communication control method - Google Patents

Description

  The present invention relates to a wireless communication system.

  In the LTE (Long Term Evolution) system, band dispersion is used for moving a mobile device to an appropriate cell. Furthermore, in the LTE-Advanced system, carrier aggregation (CA) control for communicating with a mobile device using a plurality of frequency bands is introduced. In band distribution and CA control, a base station (evolved NodeB: eNB) instructs a mobile device (User Equipment: UE) to measure one or more frequency bands, and the mobile device sends measurement results regarding the quality of each frequency band. get. Based on the obtained measurement results of each frequency band, the base station determines a cell in which the mobile device should be located in band dispersion, or sets an additional secondary cell in the mobile device in CA control.

  In the band distribution processing at the time of outgoing / incoming calls in the LTE system or LTE-Advanced system, as shown in FIG. 1, the base station activates a measurement gap to measure the cell quality for band distribution. Is started, a measurement report reception waiting timer (T_C_MeaRepEa4) that times the reception period of the measurement report related to the measurement result is started. Based on the measurement reports (800M, 1.5G, and 1.7G frequency band measurement results) acquired from the mobile device before the timer expires, the base station performs band distribution for the mobile device.

  In addition, in the secondary cell (Scell) addition process at the time of outgoing / incoming calls in the LTE system or the LTE-Advanced system, as shown in FIG. 2, the base station similarly activates the measurement gap, thereby adding a cell for adding the Scell. When the mobile device is instructed to measure the quality of the measurement, a measurement report reception waiting timer (T_C_MeaRepEa4) is started. Based on the measurement reports (1.5G and 1.7G frequency band measurement results) acquired from the mobile device before the timer expires, the base station performs CA control for adding a secondary cell to the mobile device. Execute.

3GPP TS36.133 V12.5.0 (2014-09)

  In the LTE standard, a maximum time for a mobile device to measure a frequency band or a carrier and report a measurement report regarding the measurement result is defined. Specifically, the measurement time for the mobile device to measure one carrier is specified to be within 3840 ms, and the transmission time for the mobile device to transmit a measurement report regarding the measurement result to the base station is within 480 ms. It is stipulated that That is, the report time (= measurement time + transmission time) for the mobile device to measure one carrier and transmit a measurement report is defined to be within 4320 ms (= 3840 ms + 480 ms). In addition, for two carriers, the mobile station is required to report a measurement report to the base station within 8640 ms (= 4320 ms × 2). For three carriers, the mobile station is within 12960 ms (= 4320 ms × 3). It is stipulated to report a measurement report to the base station.

  On the other hand, the measurement report reception waiting timer used in the base station is set to a fixed value. For this reason, if the actual report time of the measurement report of the mobile device is shorter than the fixed time currently specified, or if the operating frequency of the base station is low, the measurement report is sent after the measurement report is transmitted from the mobile device. It is predicted that the time until the reception waiting timer expires will be longer. In the meantime, the measurement gap continues to be activated, and the throughput decreases due to unnecessary waiting. Furthermore, until the measurement report reception waiting timer expires, the base station does not execute band distribution or CA control, and the mobile station cannot use a frequency band in which an improvement in throughput is expected. On the other hand, if the actual report time of the measurement report of the mobile device is longer than the fixed time currently specified, or if the base station has a high frequency of operation, the base station will wait until the measurement report reception timer expires. There is a possibility that measurement reports regarding all frequency bands to be measured cannot be obtained from the mobile device. In this case, the base station may not be able to execute band dispersion or CA control to a frequency band where the improvement in throughput is most expected.

  In the current LTE system, the value of the measurement report reception waiting timer is set to be longer than the upper limit of the report time described above in consideration of the measurement time and transmission time by the mobile device.

  In view of the above-described problems, an object of the present invention is to provide a technique for setting a measurement report reception waiting timer to an appropriate value.

  In order to solve the above problems, according to one embodiment of the present invention, a wireless communication control unit that controls wireless communication with a mobile device and a measurement instruction for instructing measurement of one or more frequency bands are notified to the mobile device. A timer management for managing a measurement report reception waiting timer for measuring a reception period of the measurement report from the mobile device, and a measurement report acquisition unit for acquiring a measurement report for the measured one or more frequency bands from the mobile device A base station that sets a timer value of the measurement report reception waiting timer based on one or both of the mobile device related to the measurement instruction and one or more frequency bands. About the station.

  Another aspect of the present invention is a wireless communication control method executed by a base station, the step of notifying a mobile device of a measurement instruction for instructing measurement of one or more frequency bands; Starting a measurement report reception waiting timer for timing a measurement report reception period, obtaining a measurement report for the measured one or more frequency bands from the mobile station, and until the measurement report reception waiting timer expires Performing band distribution or carrier aggregation control for the mobile device based on the received measurement report, and a timer value of the measurement report reception waiting timer is equal to or more than one of the mobile device related to the measurement instruction and None set based on one or both of the frequency bands A communication control method.

  According to the present invention, the measurement report reception waiting timer can be set to an appropriate value.

FIG. 1 is a sequence diagram showing band distribution processing at the time of outgoing / incoming calls according to the prior art. FIG. 2 is a sequence diagram showing secondary cell addition processing at the time of outgoing / incoming calls according to the prior art. FIG. 3 is a schematic diagram illustrating a wireless communication system according to an embodiment of the present invention. FIG. 4 is a block diagram illustrating a configuration of a base station according to an embodiment of the present invention. FIG. 5 is a flowchart showing a measurement report waiting timer setting process according to an embodiment of the present invention. FIG. 6 is a flowchart showing a measurement report waiting timer setting process according to an embodiment of the present invention. FIG. 7 is a flowchart showing a measurement report waiting timer setting process according to an embodiment of the present invention. FIG. 8 is a sequence diagram showing a wireless communication control process according to an embodiment of the present invention.

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

  In an embodiment described later, a base station that controls wireless communication based on a measurement report regarding one or more frequency bands received from a mobile device is disclosed. In summary, the base station notifies a mobile station of a measurement instruction for measuring one or more frequency bands, and measures a reception period of a measurement report from the mobile station. Start up. The base station sets a measurement report reception waiting timer based on one or both of the mobile device related to the measurement instruction and one or more frequency bands, and based on the measurement report received before the expiration of the measurement report reception waiting timer, Band dispersion or carrier aggregation control is executed. Here, the measurement report reception waiting timer is set based on the type of the mobile device, the capability of the mobile device, the number of frequency bands related to the measurement instruction, or any combination thereof.

  Compared to the case where the measurement report reception waiting timer is set to a fixed value, the measurement report reception waiting timer is set to a timer value suitable for the mobile device to be measured and the frequency band. By realizing carrier aggregation control, it is possible to improve throughput and load balancing between cells.

  First, a radio communication system according to an embodiment of the present invention will be described with reference to FIG. FIG. 3 is a schematic diagram illustrating a wireless communication system according to an embodiment of the present invention.

  As shown in FIG. 3, the wireless communication system 10 includes base stations 100 </ b> A and 100 </ b> B (hereinafter collectively referred to as the base station 100), a mobile device 200, and an MME (Mobility Management Entity) 300.

  The base station 100 provides one or more cells and performs wireless communication with the mobile device 200 via the cells. In the illustrated embodiment, the base station 100A provides three cells of A1 cell, A2 cell, and A3 cell of different frequency bands, and the adjacent base station 100B has two of B1 cell and B2 cell of different frequency bands. Provides one cell. Base stations 100A and 100B are interconnected and communicate via an X2 interface. In the illustrated embodiment, the mobile device 200 is located in the A1 cell of the base station 100A.

  The base station 100A activates the measurement gap to activate the measurement gap in order to measure the quality of the other one or more cells A2, A3, B1, and B2 at any timing such as outgoing / incoming, during communication, and at the end of a call. And a measurement report regarding the measurement result of each cell is acquired from the mobile device 200. As will be described in detail below, the base station 100A may transition or hand over the mobile device 200 to another cell based on the measurement report acquired from the mobile device 200 within the period set in the measurement report waiting timer ( Band dispersion) or an additional secondary cell is set in the mobile device 200 (CA control).

  The base station 100 typically includes a communication interface for communicating with a core network (not shown), hardware such as a processor, a memory, and a circuit for controlling wireless communication between the core network and the mobile device 200. Hardware resources. Each function and process of the base station 100 to be described later may be realized by a processor processing or executing data or a program stored in a memory. However, the base station 100 is not limited to the hardware configuration described above, and may have any other appropriate hardware configuration.

  The mobile device 200 supports a multiband function capable of communicating with the base station 100 using a plurality of frequency bands. Furthermore, the mobile device 200 may support a carrier aggregation function for communicating with one or more base stations 100 using a plurality of cells simultaneously. The mobile device 200 performs radio communication with the base station 100 using one or more cells provided by the base station 100 using a multiband function and / or a carrier aggregation function. The mobile device 200 is any appropriate information processing device having a wireless communication function such as a smartphone, a mobile phone, a tablet, and a wearable terminal, and is provided by the wireless communication system 10 by wirelessly connecting to the base station 100. Use various communication services.

  The MME 300 is provided as an upper layer of the base station 100 in the radio communication system 10 or one node of the core network, and manages radio communication of the mobile device 200 such as location registration of the mobile device 200 and handover between base stations. The MME 300 is interconnected with the base station 100 and provides the base station 100 with various types of information regarding the mobile device 200 such as the type of the mobile device 200 and user information.

  Next, a base station according to an embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a block diagram illustrating a configuration of a base station according to an embodiment of the present invention.

  As illustrated in FIG. 4, the base station 100 includes a radio communication control unit 110, a measurement report acquisition unit 120, and a timer management unit 130.

  The wireless communication control unit 110 controls wireless communication with the mobile device 200. Specifically, the radio communication control unit 110 transmits / receives various control signals and data signals to / from the mobile device 200 via the cell, and performs a band to the mobile device 200 based on the measurement report acquired from the mobile device 200. Distributed or carrier aggregation control is executed. For example, the radio communication control unit 110 transitions the mobile device 200 to an appropriate cell (band distribution), or sets an additional secondary cell in the mobile device 200 (carrier aggregation control).

  The measurement report acquisition unit 120 notifies the mobile device 200 of a measurement instruction for instructing measurement of one or more frequency bands, and acquires a measurement report regarding one or more frequency bands measured from the mobile device 200. Specifically, the measurement report acquisition unit 120 causes the mobile device 200 to measure the quality of one or more designated frequency bands at any timing such as when a call is made / received, during communication, or at the end of a call. To start. Thereafter, the measurement report acquisition unit 120 obtains measurement results such as RSRP (Reference Signal Received Power) and RSRQ (Reference Signal Received Quality) indicating the quality of one or more specified frequency bands from the mobile device 200 that has activated the measurement gap. Received as a measurement report. The measurement report acquisition unit 120 provides the acquired measurement report to the wireless communication control unit 110. When the measurement report reception waiting timer expires, the radio communication control unit 110 performs band distribution or carrier aggregation control on the mobile device 200 based on the acquired measurement report.

  The timer management unit 130 manages a measurement report reception waiting timer that measures the reception period of the measurement report from the mobile device 200, and based on one or both of the mobile device 200 and one or more frequency bands related to the measurement instruction, Set the timer value of the measurement report reception wait timer. The measurement report reception waiting timer is set to a fixed value, but in this embodiment, it is variable according to the mobile device 200 that has activated the measurement gap and / or the frequency band instructed as the measurement target in the measurement gap. Set to the correct value.

  In one embodiment, the timer management unit 130 may set the timer value of the measurement report reception waiting timer according to the type of the mobile device 200. In general, the report time (= measurement time + transmission time) required for reporting a frequency band by the mobile device 200 is the type of the mobile device 200, particularly the ability or performance of a communication chip mounted on the mobile device 200, and IMEISV (International Mobile It is known to rely on the Station Equipment Identity and Software Version Number). For this reason, the timer management unit 130 predicts that a measurement report can be received in a relatively short reporting time for the relatively high performance mobile device 200, and sets the measurement report reception waiting timer to a relatively small timer value. May be set. On the other hand, the timer management unit 130 predicts that the measurement report is acquired with a relatively long report time for the mobile device 200 having relatively low performance, and sets the measurement report reception waiting timer to a relatively large timer value. May be.

  Specifically, the timer management unit 130 determines the type of the mobile device 200 based on the mobile device type information of the mobile device 200 acquired from the upper layer of the base station 100, and determines the measurement time according to the measurement instruction from the determined type. The transmission time may be determined, and the timer value of the measurement report reception waiting timer may be set according to the determined measurement time and transmission time. For example, the upper layer is the MME 300, and the timer management unit 130 may acquire the mobile device type information indicating the type of the mobile device 200 from the MME 300. In this case, the timer management unit 130 determines the type of the communication chip mounted on the mobile device 200 and the type of the mobile device 200 such as IMEISV from the received mobile device type information, and determines the capability of the mobile device 200 from the determined type. Estimate performance. Based on the estimated ability or performance of the mobile device 200 and IMEISV, the timer management unit 130 determines the measurement time and the transmission time of the mobile device 200 required to realize the measurement instruction for the mobile device 200, and determines The timer value of the measurement report reception waiting timer is set according to the measured time and transmission time.

  For example, when the capability or performance of the mobile device 200 is indicated by a plurality of capability values, the timer management unit 130 may set a measurement report reception waiting timer by a processing flow as shown in FIG. As illustrated in FIG. 5, when the timer management unit 130 acquires the mobile device type information of the mobile device 200 from the MME 300, in step S101, the timer management unit 130 determines the capability value X of the mobile device 200 based on the acquired mobile device type information. . For example, the timer management unit 130 holds in advance a table or the like indicating the correspondence between each type of mobile device 200 and the capability value X, and stores the capability value X corresponding to the mobile device type information received with reference to the table. You may decide.

  When the capability value X of the mobile device 200 is A seconds (X = A), the timer management unit 130 sets the measurement report reception waiting timer to a predetermined first timer value (T_C_MeaRepEa4_a) in step S102.

  On the other hand, when the capability value X of the mobile device 200 is B (> A) seconds (X = B), the timer management unit 130 sets the measurement report reception waiting timer to a predetermined first value larger than the first timer value in step S103. 2 Set to the timer value (T_C_MeaRepEa4_b).

  On the other hand, when the capability value X of the mobile device 200 is C (> B) seconds (X = C), the timer management unit 130 sets the measurement report reception waiting timer to a predetermined first value larger than the second timer value in step S104. 3 Set to the timer value (T_C_MeaRepEa4_c).

  On the other hand, when the capability value X of the mobile device 200 is other than A, B, or C, the timer management unit 130 sets the measurement report reception waiting timer to a predetermined default timer value (T_C_MeaRepEa4_default) in step S105.

  In this way, the timer management unit 130 can set the timer value of the measurement report reception waiting timer suitable for the capability or performance of the mobile device 200 according to the type of the mobile device 200.

  In one embodiment, the timer management unit 130 may set the timer value of the measurement report reception waiting timer according to the capability of the mobile device 200. A mobile device 200 having a multiband function can communicate with the base station 100 via a plurality of frequency bands. As described above, the report time (= measurement time + transmission time) required for reporting the frequency band by the mobile device 200 depends on the number of frequency bands that the mobile device 200 measures. Therefore, the timer management unit 130 may set the timer value of the measurement report reception waiting timer according to the capability of the mobile device 200, particularly the frequency band that can be supported by the mobile device 200 and the number of frequency bands that can be supported. Good. For example, the timer management unit 130 predicts that a measurement report can be received in a relatively short report time for the mobile device 200 with a relatively low frequency band that can be handled, and sets the measurement report reception waiting timer relatively. A small timer value may be set. On the other hand, the timer management unit 130 predicts that a measurement report is acquired in a relatively long report time for the mobile device 200 having a relatively large number of frequency bands that can be handled, and the measurement report reception waiting timer is relatively large. A timer value may be set.

  Specifically, the timer management unit 130 determines the capability of the mobile device 200 based on the mobile functional force information of the mobile device 200 acquired from the mobile device 200, and based on the determined capability, The number of corresponding frequency bands may be determined, and the timer value of the measurement report reception waiting timer may be set according to the determined frequency band or number of bands. For example, the timer management unit 130 may acquire mobile capability information (UE Capability) indicating the capability of the mobile device 200 from the mobile device 200. In this case, the timer management unit 130 determines the capability of the mobile device 200 such as a frequency band supported by the mobile device 200 from the received mobile functional capability information, and the frequency band band that the mobile device 200 can handle from the determined capability. Determine the number. The timer management unit 130 sets the timer value of the measurement report reception waiting timer according to the determined frequency band that can be handled by the mobile device 200 and the number of frequency bands that can be handled.

  For example, when the mobile device 200 can handle 1 to 4 frequency bands, the timer management unit 130 may set a measurement report reception waiting timer according to a processing flow as shown in FIG. As shown in FIG. 6, when the timer management unit 130 acquires the mobile functional capability information of the mobile device 200 from the mobile device 200, in step S201, the timer management unit 130 indicates that the mobile device 200 has a multiband function. That is, whether multiple frequency bands are supported. When the mobile device 200 has the multiband function (S201: Yes), the timer management unit 130 proceeds to step S202, and determines the number of frequency bands X that can be handled by the mobile device 200. On the other hand, when the mobile device 200 does not have a multiband function (S201: No), the timer management unit 130 does not wait for reception of a measurement report, and does not set a measurement report reception waiting timer in step S203.

  When there are two frequency bands that can be handled by the mobile device 200 (X = 2), the timer management unit 130 sets the measurement report reception waiting timer to a predetermined first timer value (T_C_MeaRepEa4_1band, ue) in step S204. To do.

  On the other hand, when there are three frequency bands that the mobile device 200 can handle (X = 3), the timer management unit 130 sets a measurement report reception waiting timer to a predetermined second timer larger than the first timer value in step S205. Set to the value (T_C_MeaRepEa4_2band, ue).

  On the other hand, if the mobile device 200 has four frequency bands that can be handled (X = 4), the timer management unit 130 sets the measurement report reception waiting timer to a predetermined third timer larger than the second timer value in step S206. Set to the value (T_C_MeaRepEa4_3band, ue).

  In this way, the timer management unit 130 can set the timer value of the measurement report reception waiting timer suitable for the number of frequency bands that can be handled by the mobile device 200 according to the capability of the mobile device 200.

  In one embodiment, the timer management unit 130 may set the timer value of the measurement report reception waiting timer according to the number of frequency bands related to the measurement instruction. The frequency band to be measured and reported by the mobile device 200 is specified according to the operation conditions and congestion status of the base station 100. For example, when the base station 100 operates only a cell corresponding to a part of the frequency band that can be supported by the mobile device 200, the measurement report acquisition unit 120 may only need the measurement report regarding the part of the frequency band. unknown. In addition, when a specific cell of the base station 100 is congested, the radio communication control unit 110 does not want to move the mobile device 200 to the congested cell or set the congested cell as an additional secondary cell. First, the measurement report acquisition unit 120 may only need a measurement report related to cells other than the congested cell. For this reason, the measurement report acquisition unit 120 specifies a frequency band to be measured in the measurement instruction according to the operation conditions and the congestion state of the base station 100. As described above, the report time (= measurement time + transmission time) required for reporting the frequency band by the mobile device 200 depends on the number of frequency bands that the mobile device 200 measures. For this reason, the timer management unit 130 may set the timer value of the measurement report reception waiting timer according to the number of frequency bands to be measured designated in the measurement instruction. Specifically, the timer management unit 130 may set the timer value according to the number of bands of overlay cells or add-on cells to be measured in the measurement instruction notified to the mobile device 200 by the measurement report acquisition unit 120. Here, the overlay cell is a cell that is a candidate for band dispersion, and the add-on cell is a cell that is a candidate for a secondary cell added in CA control.

  For this reason, as an example, the timer management unit 130 may preset timer values corresponding to the number of frequency bands to be measured. For example, when one frequency band is specified in the measurement instruction, the timer management unit 130 may set the measurement report reception waiting timer to a predetermined timer value for one band. Similarly, when X frequency bands are designated in the measurement instruction, the timer management unit 130 may set the measurement report reception waiting timer to a predetermined timer value for the X band.

  As another example, the timer management unit 130 presets a reference timer value such as a timer value for one band, multiplies the number X of the frequency bands to be measured by the reference timer value, and calculates the calculated timer value. A measurement report reception waiting timer may be set.

  Here, when receiving a measurement report corresponding to the number of bands from the mobile device 200, the timer management unit 130 may expire the measurement report reception waiting timer. That is, when the measurement report acquisition unit 120 receives the measurement reports for all the frequency bands specified by the measurement instruction before the measurement report reception waiting timer expires, the timer management unit 130 expires the measurement report reception waiting timer. The mobile device 200 may be detached early from the gap activation state. As a result, the wireless communication control unit 110 can quickly perform band distribution and carrier aggregation control on the mobile device 200 without waiting for the timer value set in the measurement report reception waiting timer to elapse. Become.

  For example, when the frequency band operated by the base station 100 is three bands, the timer management unit 130 may set a measurement report reception waiting timer by a processing flow as shown in FIG. As shown in FIG. 7, in step S <b> 301, the timer management unit 130 determines the number X of frequency bands specified in the measurement instruction for the mobile device 200.

  When one frequency band is specified in the measurement instruction (X = 1), in step S302, the timer management unit 130 sets the measurement report reception waiting timer to a predetermined first timer value (T_C_MeaRepEa4_1band, cell).

  On the other hand, when two frequency bands are specified in the measurement instruction (X = 2), in step S303, the timer management unit 130 sets the measurement report reception waiting timer to a predetermined second timer value (T_C_MeaRepEa4_2band) larger than the first timer value. , Cell).

  On the other hand, when three frequency bands are specified in the measurement instruction (X = 3), the timer management unit 130 sets a measurement report reception waiting timer to a predetermined third timer value (T_C_MeaRepEa4_3band) larger than the second timer value in step S304. , Cell).

  When the measurement report acquisition unit 120 receives a measurement report related to the X frequency bands specified in the measurement instruction before the measurement report reception waiting timer expires, the timer management unit 130 sets the measurement report reception waiting timer in step S305. Expire. When the measurement report reception waiting timer expires, the radio communication control unit 110 performs band distribution or carrier aggregation control on the mobile device 200 based on the acquired measurement report.

  In this way, the timer management unit 130 can set the timer value of the measurement report reception waiting timer suitable for the number of frequency bands in accordance with the number of frequency bands specified in the measurement instruction.

  Note that the various setting processing of the measurement report reception waiting timer by the timer management unit 130 described with reference to FIGS. 5 to 7 is not necessarily executed individually, and may be executed in combination. That is, the timer management unit 130 may set the timer value of the measurement report reception waiting timer based on both the mobile device 200 related to the measurement instruction and one or more frequency bands. For example, the timer management unit 130 may set the timer value of the measurement report reception waiting timer according to two or more of the type of the mobile device 200, the capability of the mobile device 200, and the number of frequency bands related to the measurement instruction.

  Next, with reference to FIG. 8, a radio communication control process in a base station according to an embodiment of the present invention will be described. FIG. 8 is a sequence diagram showing a wireless communication control process according to an embodiment of the present invention.

  As illustrated in FIG. 8, the base station 100 receives an Initial Context Setup Request from the MME 300 in step S401.

  In step S402, the base station 100 determines the type of the mobile device 200 based on the mobile device type information indicated in the UE Bitmap Information of the Initial Context Setup Request, and the timer of the measurement report reception waiting timer according to the determined type. Set the value. In addition, the base station 100 confirms the operating frequency band and the congestion state, and generates a measurement instruction for the mobile device 200 specifying the frequency band to be measured.

  In step S403, the base station 100 instructs the mobile device 200 to start a measurement gap.

  In steps S404 and S405, the base station 100 notifies the mobile device 200 of a measurement instruction by transmitting a Security Mode Command and an RRC Connection Reconfiguration.

  In Steps S406 and 407, the mobile station 200 responds with the Security Mode Complete and the RRC Connection Reconfiguration Complete, and measures the quality of the frequency band specified in the measurement gap.

  In step S408, the base station 100 responds to the MME 300 with an Initial Context Setup Response.

  In step S409, a measurement report reception waiting timer based on the timer value set in step S402 is started.

  In step S410, the base station 100 receives the measurement report from the mobile device 200.

  In step S411, when the measurement report reception waiting timer expires or when all measurement reports regarding the frequency band specified in the measurement instruction are received, the base station 100 determines in step S412 the mobile device 200 based on the acquired measurement report. Execute band dispersion or carrier aggregation control for.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the specific embodiment mentioned above, In the range of the summary of this invention described in the claim, various deformation | transformation・ Change is possible.

10 radio communication system 100 base station 110 radio communication control unit 120 measurement report acquisition unit 130 timer management unit 200 mobile device 300 MME

Claims (9)

A wireless communication control unit for controlling wireless communication with the mobile device;
A measurement report acquisition unit for notifying the mobile device of a measurement instruction for instructing measurement of one or more frequency bands, and acquiring a measurement report regarding the measured one or more frequency bands from the mobile device;
A timer management unit for managing a measurement report reception waiting timer for timing the reception period of the measurement report from the mobile device , which is activated when the measurement instruction is notified ;
A base station having
The timer management unit is a base station that sets a timer value of the measurement report reception waiting timer based on one or both of a mobile device related to the measurement instruction and one or more frequency bands.   The base station according to claim 1, wherein the timer management unit sets a timer value of the measurement report reception waiting timer according to a type of the mobile device.   The timer management unit determines a type of the mobile device based on mobile device type information of the mobile device acquired from an upper layer of the base station, and determines a measurement time and a transmission time according to the measurement instruction from the determined type. The base station according to claim 2, wherein a timer value of the measurement report reception waiting timer is set according to the determined measurement time and transmission time.   The base station according to claim 1, wherein the timer management unit sets a timer value of the measurement report reception waiting timer according to the capability of the mobile device.   The timer management unit determines the capability of the mobile device based on the mobile functional force information of the mobile device acquired from the mobile device, determines the number of bands of the corresponding frequency band of the mobile device from the determined capability, The base station according to claim 4, wherein a timer value of the measurement report reception waiting timer is set according to the determined number of bands.   The base station according to claim 1, wherein the timer management unit sets a timer value of the measurement report reception waiting timer according to the number of frequency bands related to the measurement instruction.   The base station according to claim 6, wherein the timer management unit expires the measurement report reception wait timer when receiving a measurement report corresponding to the number of bands from the mobile device.   The wireless communication control unit executes band distribution or carrier aggregation control for the mobile device based on the acquired measurement report when the measurement report reception waiting timer expires. Base station. A wireless communication control method executed by a base station,
Notifying the mobile device of a measurement instruction for instructing measurement of one or more frequency bands;
Notifying the measurement instruction and starting a measurement report reception waiting timer for measuring a reception period of a measurement report from the mobile device;
Obtaining a measurement report on the measured one or more frequency bands from the mobile device;
Performing band distribution or carrier aggregation control for the mobile device based on a measurement report received before expiration of the measurement report reception waiting timer;
Have
The radio communication control method in which the timer value of the measurement report reception waiting timer is set based on one or both of the mobile device related to the measurement instruction and one or more frequency bands.

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