JPWO2013137424A1 - Mobile station and radio base station - Google Patents

Abstract

The mobile station UE according to the present invention provides a reception unit 11 configured to receive broadcast information, a measurement unit 12 configured to measure predetermined radio quality, and a radio base station eNB, A transmission unit 13 configured to transmit a “Measurement Report” including the reception result of the broadcast information and the measurement result measured by the measurement unit 12.

Description

  The present invention relates to a mobile station and a radio base station.

  In the LTE (Long Term Evolution) method, “MDT” that reduces the labor and cost of a driving test (Drive Test) performed by a communication carrier by collecting measurement results of predetermined radio quality in a real environment from a mobile station UE. (Minimization of Drive Tests, measurement running test) is defined.

  In such MDT, the radio base station eNB obtains measurement results (RSRP: Reference Signal Received Power, RSRQ: Reference Signal Received Quality) and location information (Location Information) of the mobile station UE from the mobile station UE. be able to.

3GPP TS37.320 3GPP TS36.331

  However, the existing MDT has a problem that information that can be acquired by the radio base station eNB is limited.

  That is, in the existing MDT, there is a problem that the radio base station eNB cannot acquire the broadcast information reception result in the mobile station UE.

  Then, this invention is made | formed in view of the above-mentioned subject, and it aims at providing the mobile station and radio | wireless base station which can acquire about the reception result of the alerting | reporting information in the mobile station UE in MDT. And

  A first feature of the present invention is a mobile station, comprising: a receiving unit configured to receive broadcast information; a measuring unit configured to measure predetermined radio quality; and a radio base station On the other hand, the gist includes a transmission unit configured to transmit a measurement report including a reception result of the broadcast information and a measurement result measured by the measurement unit.

  A second feature of the present invention is a radio base station, a transmitter configured to repeatedly transmit an SIB, and a measurement including a reception result of the SIB and an SFN that has received the SIB from a mobile station Based on the receiving unit configured to receive the report, the SFN that started transmission of the SIB at the radio base station, and the SFN that received the SIB at the mobile station, the transmission at the mobile station And a calculation unit configured to calculate whether the received SIB is received.

  A third feature of the present invention is a radio base station, a transmission unit configured to repeatedly transmit SIB, and a measurement report including a reception result of the SIB and a reception time of the SIB from a mobile station The SIB transmitted at the mobile station based on the reception start time of the SIB at the radio base station and the reception time of the SIB at the mobile station. And a calculation unit configured to calculate whether or not the message is received.

  As described above, according to the present invention, it is possible to provide a mobile station and a radio base station that can obtain the reception result of broadcast information in the mobile station UE in MDT.

FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention. FIG. 2 is a functional block diagram of the mobile station according to the first embodiment of the present invention. FIG. 3 is a diagram for explaining a method for receiving broadcast information in the mobile station according to the first embodiment of the present invention. FIG. 4 is a diagram for explaining a method for receiving broadcast information in the mobile station according to the first embodiment of the present invention. FIG. 5 is a diagram for explaining a broadcast information reception method in the mobile station according to the first embodiment of the present invention. FIG. 6 is a diagram for explaining a method for receiving broadcast information in the mobile station according to the first embodiment of the present invention. FIG. 7 is a diagram illustrating an example of a format of “UE Information Response” transmitted by the mobile station according to the first embodiment of the present invention. FIG. 8 is a diagram illustrating an example of a format of “ReportConfigEUTRA” in “RRC Connection Reconfiguration” transmitted by the radio base station according to the first embodiment of the present invention. FIG. 9 is a diagram illustrating an example of a format of “MeasResults” transmitted by the mobile station according to the first embodiment of the present invention. FIG. 10 is a functional block diagram of the radio base station according to the first embodiment of the present invention. FIG. 11 is a diagram for explaining a calculation method in the radio base station according to the first embodiment of the present invention. FIG. 12 is a functional block diagram of a mobile station according to the first modification of the present invention.

(Mobile communication system according to the first embodiment of the present invention)
A mobile communication system according to a first embodiment of the present invention will be described with reference to FIG. 1 to FIG.

  In the mobile communication system according to the present embodiment, it is possible to realize MDT defined in the LTE scheme.

  As shown in FIG. 1, in the mobile communication system according to the present embodiment, the radio base station eNB is configured to transmit broadcast information via a BCCH (Broadcast Control Channel) in the subordinate cell # 1. Yes.

  As illustrated in FIG. 2, the mobile station UE according to the present embodiment includes a receiving unit 11, a measuring unit 12, and a transmitting unit 13.

  The receiving unit 11 is configured to receive various signals transmitted by the radio base station eNB.

  For example, the receiving unit 11 may be configured to receive “Measurement Configuration” instructing to measure the predetermined radio quality for MDT from the radio base station eNB.

  Moreover, the receiving part 11 is comprised so that the alerting | reporting information transmitted by the wireless base station eNB may be received.

  For example, the reception unit 11 is configured to receive and store (Log) MIB (Master Information Block) via BCCH transmitted on PBCH (Physical Broadcast Channel) and BCH (Broadcast Channel). ing.

  Here, as shown in FIG. 3, the MIB is configured to be repeatedly transmitted every 40 ms.

  In addition, the MIB is configured to notify, as basic parameters, for example, system bandwidth, SFN (System Frame Number), the number of transmission antennas (detected by Blind Decoding by the mobile station UE), and the like. .

  In addition, the reception unit 11 performs soft composite reception on the MIB over a plurality of subframes (within 40 ms), so that even when the mobile station UE is at the cell edge, the reception unit 11 is constant due to time diversity gain. The above reception quality can be obtained.

  Note that the receiving unit 11 may be configured to receive the MIB in each subframe alone. As a result, when the mobile station UE is in the vicinity of the radio base station eNB, the receiving unit 11 can receive the MIB in a short time.

  The receiving unit 11 is configured to receive and store (Log) SIBs (System Information Blocks) 1 to 12 via the BCCH transmitted on the PDSCH (Physical Downlink Shared Channel). .

  Here, the SIB 1 is configured to notify parameters such as cell selection and scheduling information.

  The SIB2 is configured to notify common parameters for UEs located in the corresponding cell, for example, common radio parameters, restriction information, and the like.

  Moreover, SIB3-8 is comprised so that the parameter for Intra-frequency / Inter-frequency / Inter-RAT Cell Reselection may be notified.

  Further, the SIBs 10 to 12 are configured to notify parameters for receiving ETWS (Earthquake and Tsunami Warning System) and CMAS (Commercial Mobile Alert System).

  As shown in FIG. 4, SIB1 is configured to be repeatedly transmitted every 80 ms, and SI (System Information) -1 is configured to be repeatedly transmitted every 160 ms. Is configured to be repeatedly transmitted every 320 ms, SI-3 is configured to be repeatedly transmitted every 640 ms, and SI-4 is configured to be repeatedly transmitted every 1280 ms. Has been.

  SI-1 to SI-4 are configured to be mapped to any of SIB2 to SIB12. The SIBs 2 to 12 are configured to transmit SI-1 to SI-4 at a configurable transmission interval (SI window).

  Here, the reception unit 11 performs soft combining reception on the SIB1 over a plurality of subframes (within 80 ms), so that even when the mobile station UE is at the cell edge, the time diversity gain A certain level of reception quality can be obtained.

  Further, as shown in FIG. 5 and FIG. 6, the receiving unit 11 receives a paging signal (Paging), and receives instruction information and ETWS / CMAS for instructing to change broadcast information (MIB / SIB) to the paging signal. When “ETWS / CMAS Indication” to instruct is included, SIB1 is received, and SIBs 10 to 12 are received according to “SchedulingInfoList” in SIB1.

  For example, when the mobile station UE is waiting in the cell # 1, that is, in the Idle state, when receiving the MIB, the receiving unit 11 receives the SIB1 and follows the “SchedulingInfoList” in the SIB1. , SIB10 to 12 are configured to be received.

  Further, for example, when the mobile station UE is waiting in the cell # 1, that is, in the idle state, the receiving unit 11 receives the SIB1 after receiving the paging signal, and the “ It is configured to receive SIB10 / 11 according to “SchedulingInfoList”.

  Further, for example, when the mobile station UE is communicating in the cell # 1, that is, in the RRC connected state, the receiving unit 11 receives the SIB1 after receiving the paging signal, It is configured to receive SIB10 / 11 according to “SchedulingInfoList”.

  The measurement unit 12 is configured to measure a predetermined radio quality for MDT in accordance with “Measurement Configuration” received by the reception unit 11.

  Moreover, the measurement part 12 may be comprised so that "Location Information" which is the positional information on the mobile station UE may be acquired.

  The transmission unit 13 is configured to transmit “Measurement Report” including a measurement result of the predetermined radio quality for MDT to the radio base station eNB.

  Further, the transmission unit 13 may be configured to include the “Location Information” acquired by the measurement unit 12 in the “Measurement Report”.

  Here, the transmission unit 13 may be configured to include the reception result of the broadcast information recorded by the reception unit 11 in “Measurement Report”.

  For example, the transmission unit 13 may be configured to include the MIB reception result as the reception result of the broadcast information recorded by the reception unit 11 in “Measurement Report”.

  Alternatively, the transmission unit 13 may be configured to include the reception result of the SIB1 as the reception result of the broadcast information recorded by the reception unit 11 in the “Measurement Report”.

  Or the transmission part 13 may be comprised so that the reception result of SIB2-12 may be included in the "Measurement Report" as a reception result of the alerting | reporting information currently recorded by the receiving part 11. FIG.

  Alternatively, the transmission unit 13 may be configured to include the reception result of the paging signal as the reception result of the broadcast information recorded by the reception unit 11 in “Measurement Report”.

  Further, the transmission unit 13 may be configured to include the SFN or MIB reception time at which the MIB is received in the “Measurement Report”.

  Moreover, the transmission part 13 may be comprised so that the reception time of SFN which received SIB1-12, or SIB1-12 may be included in "Measurement Report."

  For example, in the case where “Logged MDT” is designated to be performed, when the reception unit 11 receives “UE Information Request” from the radio base station eNB, the transmission unit 13, as shown in FIG. The reception result of the broadcast information may be transmitted to the radio base station eNB by “BCCH Logging Result” or “Paging Logging Result” in “UE Information Response”.

  Also, as shown in FIG. 8, when “Immediate MDT” is specified by “includeBCCHLoggingReport-r11” or “includePagingLoggingReport-r11” in “ReportConfigEUTRA” received by the receiving unit 11, As illustrated in FIG. 9, the transmission unit 13 is configured to transmit the above-described broadcast information reception result to the radio base station eNB by “BCCH Logging Result” or “Paging Logging Result” in “Meas Result”. Also good.

  As illustrated in FIG. 10, the radio base station eNB according to the present embodiment includes a transmission unit 21, a reception unit 22, and a calculation unit 23.

  The transmission unit 21 is configured to transmit the broadcast information described above in the cell # 1 under the radio base station eNB.

  Moreover, the transmission unit 21 is configured to transmit “Measurement Configuration” including “ReportConfigEUTRA” illustrated in FIG. 8 to the mobile station UE.

  The receiving unit 22 is configured to receive various signals transmitted by the mobile station UE.

  For example, the receiving unit 22 may be configured to receive “Measurement Report” including the reception result of the broadcast information and the measurement result of the predetermined radio quality from the mobile station UE.

  Specifically, the receiving unit 22 receives the above-described broadcast information reception result and broadcast information from the “BCCH Logging Result” and “Paging Logging Result” in the “UE Information Response” illustrated in FIG. (Reception time) may be acquired.

  Alternatively, the reception unit 22 acquires the reception result of the broadcast information and the SFN (or the reception time of the broadcast information) from the broadcast information received from the “BCCH Logging Result” and “Paging Logging Result” in the “Meas Result” illustrated in FIG. It may be configured to.

  Here, when the reception unit 22 acquires the reception result indicating that the reception of SIB1 is successful, even if the reception result of SIB2 to 12 cannot be acquired, it is assumed that the reception of SIB2 to 12 is successful. It may be configured.

  Based on the SFN that started transmission of MIB / SIB in the radio base station eNB and the SFN that received MIB / SIB in the mobile station UE, the calculation unit 23 received the SIB transmitted in the mobile station UE It is comprised so that it may calculate about.

  Alternatively, based on the MIB / SIB transmission start time in the radio base station eNB and the MIB / SIB reception time in the mobile station UE, it is configured to calculate how many times the SIB transmitted in the mobile station UE has been received. Has been.

  For example, when “SFN (0 to 1023) wrap around” does not occur between SFN #x that has started transmission of SIB at radio base station eNB and SFN #y that has received SIB at mobile station UE That is, when SFN # x <SFN # y, as shown in FIG. 11, the calculation unit 23 receives the SIB transmitted at the mobile station UE based on SFN # x and SFN # y. You may be comprised so that it may calculate about whether it did.

  On the other hand, when “wraparound of SFN (0 to 1023)” occurs between SFN # x that started transmission of SIB in radio base station eNB and SFN # y that received SIB in mobile station UE That is, when SFN # x> SFN # y, as shown in FIG. 11, the calculation unit 23 is based on the SIB transmission start time n in the radio base station eNB and the SIB reception time p in the mobile station UE. The mobile station UE may be configured to calculate the number of times the SIB transmitted at the mobile station UE has been received.

  According to the invention according to the present embodiment, since the radio base station eNB can acquire the reception result of the broadcast information from the mobile station UE that is the target of MDT, the radio base station eNB can know the coverage status of the broadcast information.

  Moreover, according to the invention according to the present embodiment, it is possible to detect a parameter setting error or the like in the network by detecting that the mobile station UE is not performing an intended operation on the network side.

(Modification 1)
Hereinafter, with reference to FIG. 12, the mobile communication system according to the first modification of the present invention will be described focusing on the differences from the mobile communication system according to the first embodiment described above.

  As illustrated in FIG. 12, the mobile station UE according to the first modification includes an RRC (Radio Resource Control) layer function 31 and an application layer function 32.

  For example, the RRC layer function 31 is configured to play a role as an LTE RRC layer, and the application layer function 32 can execute an application installed (installed) in the mobile station UE. It is configured as follows.

  Here, the RRC layer function 31 includes the reception unit 11, the measurement unit 12, and the transmission unit 13 illustrated in FIG.

  Further, the application layer function 32 provides the RRC layer function 31 with a content to be reported as a measurement report to the radio base station eNB, for example, the above-described “BCCH Logging Result”, “Paging Logging Result”, “Location Information”, and the like. Configured to direct.

  In addition, the application layer function 32 may be configured to instruct the RRC layer function 31 about the content to be acquired and the content to be measured.

  For example, the RRC layer function 31 reports the acquired contents and the measured contents to the application layer function 32, and the application function 32 determines the contents to be reported as a measurement report to the radio base station eNB. The RRC layer function 31 may be instructed.

  Note that communication between the RRC layer function 31 and the application layer function 32 may be configured to be performed via an API (Application Interface).

  The transmission unit 13 is configured to transmit a measurement report to the radio base station eNB in response to an instruction from the application layer function 32.

  Further, the receiving unit 11 may be configured to acquire predetermined information from the radio base station eNB in response to an instruction from the application layer function 32.

  Alternatively, the measurement unit 12 may be configured to measure predetermined information in response to an instruction from the application layer function 32.

  The characteristics of the present embodiment described above may be expressed as follows.

  The first feature of the present embodiment is a mobile station UE, a receiving unit 11 configured to receive broadcast information, a measuring unit 12 configured to measure a predetermined radio quality, A transmission unit 13 configured to transmit a “Measurement Report” including a reception result of broadcast information and a measurement result measured by the measurement unit 12 to the radio base station eNB. Is the gist.

  In the first feature of the present embodiment, the transmission unit 13 may be configured to include the MIB reception result in the “Measurement Report” as the broadcast information reception result.

  In the first feature of the present embodiment, the transmission unit 13 may be configured to include the SIB reception result in the “Measurement Report” as the broadcast information reception result.

  In the first feature of the present embodiment, the transmission unit 13 may be configured to include the SFN that has received the SIB in the “Measurement Report”.

  In the first feature of the present embodiment, the transmission unit 13 may be configured to include the SIB reception time in the “Measurement Report”.

  In the first feature of the present embodiment, an RRC layer function 31 and an application layer function 32 are provided. The RRC layer function 31 includes a receiving unit 11, a measuring unit 12, and a transmitting unit 13, and an app. The application layer function 32 is configured to instruct the RRC layer function 31 to report the content to be reported as a measurement report to the radio base station eNB. You may be comprised so that a measurement report may be transmitted with respect to the base station eNB.

  The second feature of the present embodiment is the radio base station eNB, which is configured to repeatedly transmit SIBs, and from the mobile station UE, the reception result of the SIB and the SFN that has received the SIB. In the mobile station UE, based on the receiving unit 22 configured to receive the “Measurement Report” including the SFN that has started transmission of the SIB in the radio base station eNB and the SFN that has received the SIB in the mobile station UE The gist of the present invention is to include a calculation unit 23 configured to calculate whether the SIB transmitted for the second time has been received.

  The third feature of the present embodiment is a radio base station eNB, which includes a SIB reception result and a SIB reception time from the transmission unit 21 configured to repeatedly transmit SIB and the mobile station UE. Based on the reception unit 22 configured to receive the “Measurement Report” and the SIB transmission start time at the radio base station eNB and the SIB reception time at the mobile station UE, the transmission is performed at the mobile station UE. And a calculation unit 23 configured to calculate whether the received SIB has been received.

  The operations of the mobile station UE and the radio base station eNB described above may be implemented by hardware, may be implemented by a software module executed by a processor, or may be implemented by a combination of both. .

  The software module includes a RAM (Random Access Memory), a flash memory, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electronically Erasable and Programmable ROM, a hard disk, a registerable ROM, a hard disk). Alternatively, it may be provided in a storage medium of an arbitrary format such as a CD-ROM.

  Such a storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the mobile station UE or the radio base station eNB. Further, the storage medium and the processor may be provided as a discrete component in the mobile station UE or the radio base station eNB.

  Although the present invention has been described in detail using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modifications and changes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

Further, appli application layer function 32, to the RRC layer function 31, the content to be reported as a measurement report to the radio base station eNB, for example, the aforementioned "BCCHLoggingResult" and "PagingLoggingResult" and "Location Information", etc. Is configured to direct.

Further, appli application layer function 32, to the RRC layer function 31 may be configured to indicate the contents to be content and measurement to be obtained.

For example, RRC layer function 31, to the appli application layer function 32, and report the acquired content and the measured content, application function 32, the content to be reported as a measurement report to the radio base station eNB It may be configured to determine and instruct the RRC layer function 31.

The communication between the RRC layer function 31 and appli application layer function 32 may be configured to be performed through the API (Application Interface).

The transmission unit 13, in response to an instruction from the appli application layer function 32 is configured to transmit a measurement report to the radio base station eNB.

The receiving unit 11, in response to an instruction from the appli application layer function 32 may be configured to acquire the predetermined information from the radio base station eNB.

Alternatively, the measurement unit 12, in response to an instruction from the appli application layer function 32 may be configured to measure the predetermined information.

In the first feature of this embodiment, an RRC layer function 31 and an application layer function 32 are provided. The RRC layer function 31 includes a receiving unit 11, a measuring unit 12, and a transmitting unit 13, and re application layer function 32, to the RRC layer function 31 is configured to instruct the content to be reported as a measurement report to the radio base station eNB, the transmission unit 13, in response to the instruction, You may be comprised so that a measurement report may be transmitted with respect to the wireless base station eNB.

Claims (8)

A receiver configured to receive broadcast information;
A measurement unit configured to measure a predetermined radio quality;
A mobile station comprising: a transmission unit configured to transmit a measurement report including a reception result of the broadcast information and a measurement result measured by the measurement unit to a radio base station.   2. The mobile station according to claim 1, wherein the transmission unit is configured to include a reception result of a MIB (Master Information Block) as the reception result of the broadcast information in the measurement report.   The mobile station according to claim 1, wherein the transmission unit is configured to include a reception result of an SIB (System Information Block) as the reception result of the broadcast information in the measurement report.   The mobile station according to claim 2, wherein the transmission unit is configured to include an SFN (System Frame Number) that has received the SIB in the measurement report.   The mobile station according to claim 2, wherein the transmission unit is configured to include the reception time of the SIB in the measurement report. RRC layer function and application layer function,
The RRC layer function includes the receiving unit, the measuring unit, and the transmitting unit,
The application layer function is configured to instruct contents to be reported as the measurement report to the radio base station with respect to the RRC layer function,
The mobile station according to claim 1, wherein the transmission unit is configured to transmit the measurement report to the radio base station according to the instruction. . A wireless base station,
A transmission unit configured to repeatedly transmit SIB (System Information Block);
A receiving unit configured to receive a measurement report including a reception result of the SIB and a SFN (System Frame Number) that has received the SIB from a mobile station;
Based on the SFN that started transmission of the SIB at the radio base station and the SFN that received the SIB at the mobile station, the mobile station is configured to calculate how many times the SIB was transmitted at the mobile station. A wireless base station. A wireless base station,
A transmission unit configured to repeatedly transmit SIB (System Information Block);
A receiving unit configured to receive a measurement report including a reception result of the SIB and a reception time of the SIB from a mobile station;
Based on the SIB transmission start time at the radio base station and the SIB reception time at the mobile station, the mobile station is configured to calculate the number of times the SIB transmitted at the mobile station has been received. A wireless base station comprising a calculation unit.

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