WO2013051507A1

WO2013051507A1 - Mobile communication method, wireless base station, and mobile station

Info

Publication number: WO2013051507A1
Application number: PCT/JP2012/075387
Authority: WO
Inventors: 高橋　秀明; ウリアンダルマワンティハプサリ; 聡永田
Original assignee: 株式会社エヌ・ティ・ティ・ドコモ
Priority date: 2011-10-03
Filing date: 2012-10-01
Publication date: 2013-04-11
Also published as: JP2013081045A

Abstract

Provided is a mechanism for appropriately determining whether or not to start a CoMP transmission/reception process. This mobile communication method involves: a step in which a wireless base station (eNB) notifies, by a "Measurement Object", identification information of a CoMP transmission point, which is a candidate for performing a CoMP transmission/reception process, and setting information of CSI-RS to a mobile station (UE) connected to a cell (#5) managed by the wireless base station; and a step in which the mobile station (UE) starts a process of measuring the quality of the CoMP transmission point by using the identification information of the transmission point and the setting information of the CSI-RS that have been notified.

Description

Mobile communication method, radio base station, and mobile station

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

In the LTE (Long Term Evolution) system, the application of CoMP (Coordinated Multi-Point, multipoint coordination) transmission / reception processing has been studied for the purpose of improving the throughput of the mobile station UE located at the cell edge. Yes.

Such CoMP transmission / reception processing is performed between a plurality of geographically separated transmission / reception nodes (CoMP transmission points), for example, between a radio base station eNB, a base station radio apparatus RRE (Remote Radio Equipment), a relay node RN, and the like. In this process, the shared data channel signal transmission / reception, scheduling, beamforming, and the like are cooperatively controlled.

However, the current LTE method has a problem in that a start method for the quality measurement process of the CoMP transmission point is not defined.

Accordingly, the present invention has been made in view of the above-described problems, and provides a mobile communication method, a radio base station, and a mobile station that provide a mechanism for appropriately starting a quality measurement process of a CoMP transmission point. For the purpose.

A first feature of the present invention is a mobile communication method, in which a radio base station is a candidate for multipoint coordinated transmission / reception processing based on measurement target information for a mobile station connected to a subordinate cell. A step of notifying the identification information of the transmission point and the setting information of the reference signal for the mobile station, and the mobile station using the notified identification information of the transmission point and the setting information of the reference signal for the mobile station And a step of starting a quality measurement process of the transmission point.

A second feature of the present invention is a mobile communication method, in which a radio base station is a candidate for multipoint coordinated transmission / reception processing based on measurement target information for a mobile station connected to a subordinate cell. A step of notifying identification information of a transmission point, a step of notifying the mobile station of setting information of a reference signal for the mobile station by a connection reset signal to the mobile station, and the mobile station And a step of starting a quality measurement process of the transmission point using the notified identification information of the transmission point and the setting information of the reference signal for the mobile station.

A third feature of the present invention is a radio base station, which is a transmission candidate that is a candidate for multipoint coordinated transmission / reception processing according to measurement target information to a mobile station connected to a cell under the radio base station. The gist of the present invention is to include a transmitter configured to notify point identification information and reference signal setting information for the mobile station.

A fourth feature of the present invention is a radio base station, which is a candidate for multipoint coordinated transmission / reception processing based on measurement target information for a mobile station connected to a cell under the radio base station. The gist of the present invention is to provide a transmitter configured to notify point identification information and to notify reference information setting information for the mobile station by a connection reset signal.

A fifth feature of the present invention is a mobile station, which is connected to a cell under a radio base station, and from the radio base station via the measurement target information, candidate for multipoint coordinated transmission / reception processing A receiving unit configured to acquire transmission point identification information and reference signal setting information for the mobile station, and setting of the acquired transmission point identification information and the reference signal for the mobile station And a processing unit configured to start the quality measurement process of the transmission point using the information.

A sixth feature of the present invention is a mobile station that is connected to a cell under the radio base station, and from the radio base station via the measurement target information, candidate for multipoint coordinated transmission / reception processing A receiving unit configured to acquire identification information of a transmission point, and to acquire setting information of a reference signal for the mobile station via a connection reset signal, and identification of the acquired transmission point And a processing unit configured to start the quality measurement process of the transmission point using the information and the setting information of the reference signal for the mobile station.

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 radio base station according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating an example of the format of “Measurement Object” transmitted by the radio base station according to the first embodiment of the present invention. FIG. 4 is a functional block diagram of the mobile station according to the first embodiment of the present invention. FIG. 5 is a diagram for explaining the operation of the mobile communication system according to the first embodiment of the present invention. FIG. 6 is a diagram illustrating an example of a format of an information element “PhysicalConfigDedicated” included in “RRC Reconfiguration” transmitted by the radio base station according to the first modification of the present invention. FIG. 7 is a diagram for explaining the operation of the mobile communication system 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 present embodiment, an LTE mobile communication system will be described as an example of the mobile communication system according to the present embodiment, but the present invention is also applicable to mobile communication systems other than the LTE system.

The mobile communication system according to the present embodiment is configured to be able to perform CoMP transmission / reception processing, particularly downlink CoMP transmission / reception processing.

Such downlink CoMP transmission / reception processing includes “JT (Joint Transmission)”, “DCS (Dynamic Cell Selection)”, and “CS / CB (Coordinated Scheduling / Beamforming)”.

Here, “JT” is a process of transmitting the shared data channel signal to the mobile station UE from a plurality of cells, that is, from cells other than the serving cell.

Also, “DCS” is a process of selecting one cell at high speed based on channel quality information (CQI) and transmitting a shared data channel signal from the selected cell to the mobile station UE.

Furthermore, “CS / CB” is a process for coordinating scheduling and beamforming between the serving cell and the neighboring cells.

As shown in FIG. 1, the mobile communication system according to the present embodiment is configured to be able to provide CoMP transmission / reception processing in cells # 1 to # 5, that is, cells # 1 to # 5 Suppose that it is configured to be a CoMP support area.

Note that the cells # 1 to # 5 may be managed by the same radio base station eNB, or may be managed by different radio base stations eNB.

Each cell # 1 to # 5 is configured to be able to transmit CSI-RS (Channel State Reference Signal) in addition to CRS (Cell Specific Reference Signal).

Here, the CRS is a reference signal defined by the LTE Rel-8 / 9 scheme, and is a reference signal set in common for all mobile stations UE in each cell.

On the other hand, the CSI-RS is a reference signal defined by the LTE Rel-10 method, and is a reference signal that is individually set for each mobile station UE using an RRC (Radio Resource Control) message.

The CSI-RS may be used for a quality measurement process (measurement) such as a CoMP transmission point (CoMP transmission / reception process target candidate), a serving cell, a neighboring cell (handover destination candidate), or the like. It may be used to measure CQI at a CoMP transmission point or serving cell.

Note that the CSI-RS used for the quality measurement process described above and the CSI-RS used for measuring the CQI described above may be the same or different.

For example, the CSI-RS used for the quality measurement process and the CSI- used for measuring the CQI are measured based on the measurement accuracy in the quality measurement process and the requirements for the measurement accuracy of the CQI. A determination can be made as to whether the RSs are the same or different.

Also, the CSI-RS arrangement density is configured to be lower than the CRS arrangement density.

In addition, when CoMP transmission / reception processing is provided in cells # 1 to # 5, the same PCI (Physical Cell ID) may be used in cells (CoMP transmission points) # 1 to # 5. Alternatively, different PCIs may be used.

In the mobile communication system in the present embodiment, the mobile station UE is configured to connect to the cell # 5 under the radio base station eNB, that is, the cell # 5 is configured to be a serving cell of the mobile station UE. It is assumed that

2, the radio base station eNB includes a transmission unit 11, a reception unit 12, and a CoMP transmission / reception processing unit 13.

The transmission unit 11 is configured to transmit various signals to the mobile station UE connected to the cell # 5 and the like under the radio base station eNB, and the reception unit 12 receives from the mobile station UE, It is configured to receive various signals.

For example, for the mobile station UE connected to the cell # 5 and the like under the radio base station eNB, the transmission unit 11 uses “Measurement Object” to perform a normal quality measurement process (frequency or cell). In addition to the identification information of CoMP, identification information (for example, PCI) of CoMP transmission points (that is, cells) that are candidates for CoMP transmission / reception processing, and CSI-RS setting information (for example, multiple positions of CSI-RS) Is configured to notify.

FIG. 3 shows an example of the format of the “Measurement Object”.

Specifically, in “Measurement Object” shown in FIG. 3, “physCellId-r11” in “compTPsToAddModList” notifies the identification information of the CoMP transmission point to be added as the measurement target, or the CoMP of the measurement target. This is an information element for notifying the identification information of the CoMP transmission point whose contents should be changed among the transmission points (see descriptions A and B).

Also, in “Measurement Object” shown in FIG. 3, “csi-RS-Config-r11” in “compTPsToAddModList” notifies the setting information of CSI-RS at the CoMP transmission point to be added as a measurement target, or This is an information element for notifying the CSI-RS setting information to be changed at the CoMP transmission point to be measured (see descriptions A and B).

On the other hand, in “Measurement Object” shown in FIG. 3, “compTPsToRemoveList” is an information element for notifying the transmission point for CoMP to be deleted from the measurement target (see description A).

Note that the transmission unit 11 uses a separate “Measurement Object” for the mobile station UE connected to the cell # 5 or the like under the radio base station eNB, and performs a normal measurement target (frequency or Identification information (for example, PCI) and CSI-RS setting information (for example, multiple positions of CSI-RS). May be configured to be notified.

Here, the transmission unit 11 may be configured to notify the above-described mobile station UE of CSI-RS setting information in the serving cell of the mobile station UE by “Measurement Object”.

In such a case, the transmission unit 11 first transmits a “Measurement Object” that does not include the CSI-RS setting information in the serving cell (cell # 5) of the mobile station UE, and then the mobile station received by the reception unit 12 Even when the UE's “UE Capability” indicates that it supports CoMP transmission / reception processing, the “Measurement Object” may be configured to notify the CSI-RS setting information in the serving cell of the mobile station UE. Good.

In addition, the receiving unit 12 receives “Measurement Report (measurement report)” including the measurement result in the cell specified by “Measurement Object” from the mobile station UE connected to the cell # 5 and the like under the radio base station eNB. Is configured to do.

The “Measurement Report” includes a measurement result (a CSI-RS measurement result) at a CoMP transmission point that is a candidate for a CoMP transmission / reception process.

The CoMP transmission / reception processing unit 13 is configured to perform processing necessary when performing CoMP transmission / reception processing (for example, “JT”, “DCS”, “CS / CB”, and the like) described above.

For example, the CoMP transmission / reception processing unit 13 determines whether to start the CoMP transmission / reception process based on the measurement result at each CoMP transmission point, or which type of CoMP transmission / reception process using which CoMP transmission point. It is configured to be able to decide on what to do.

As shown in FIG. 4, the mobile station UE includes a receiving unit 21, a measuring unit 22, a transmitting unit 23, and a CoMP transmission / reception processing unit 24.

The receiving unit 21 is configured to receive various signals from the radio base station eNB that manages the serving cell (cell # 5).

For example, the receiving unit 21 receives the identification information of the target (frequency or cell) of the normal quality measurement process (measurement) from the radio base station eNB described above via the “Measurement Object”, and the target of the CoMP transmission / reception process It is configured to acquire identification information of CoMP transmission points that are candidates and CSI-RS setting information.

In addition, the receiving unit 21 receives the identification information of the target (frequency or cell) of the normal quality measurement process (measurement) and the target of the CoMP transmission / reception process from the above-described radio base station eNB via separate “Measurement Object”. It may be configured to acquire candidate CoMP transmission point identification information and CSI-RS setting information.

Further, the receiving unit 21 may be configured to acquire CSI-RS setting information in the serving cell of the mobile station UE via “Measurement Object”.

The measurement unit 22 uses the CoMP transmission point identification information and the CSI-RS setting information acquired by the reception unit 21, that is, uses the CSI-RS at the CoMP transmission point to perform the CoMP transmission / reception processing target. It is configured to perform a quality measurement process for a candidate CoMP transmission point.

In addition, the measurement unit 22 is configured to perform quality measurement processing of neighboring cells and serving cells specified by “Measurement Object” using CRS.

Further, the transmission unit 23 is configured to transmit various signals to the radio base station eNB.

Specifically, in addition to the result of the normal quality measurement process (CRS measurement result), the transmission unit 23 sets the transmission point for CoMP that is the candidate for the CoMP transmission / reception process to the radio base station eNB described above. A “Measurement Report” including the result of the quality measurement process (CSI-RS measurement result) is transmitted.

The CoMP transmission / reception processing unit 24 is configured to perform processing necessary when performing CoMP transmission / reception processing (for example, “JT”, “DCS”, “CS / CB”, and the like) described above.

For example, the CoMP transmission / reception processing unit 24 is configured to start the CoMP transmission / reception processing using the identification information of the transmission point for CoMP acquired by the reception unit 21 and the setting information of the CSI-RS, for example, CoMP It is configured to measure CQI at a CoMP transmission point performing transmission / reception processing.

The transmission unit 23 is configured to notify the above-described radio base station eNB of the CQI at the CoMP transmission point measured by the CoMP transmission / reception processing unit 24.

In addition, when the receiving unit 21 receives the CSI-RS setting information in the serving cell of the mobile station UE, the measuring unit 22 uses the CSI-RS setting information in the serving cell acquired by the receiving unit 21, You may be comprised so that the quality measurement process of a serving cell may be performed.

Here, when the mobile station UE is operated in “Transmission Mode 9”, the CoMP transmission / reception processing unit 24 uses the setting information of the CSI-RS in the serving cell acquired by the receiving unit 21 to set the CQI in the serving cell. It may be configured to measure.

In addition, when the receiving unit 21 has not received the CSI-RS setting information in the serving cell of the mobile station UE, the measuring unit 22 uses the CRS setting information in the serving cell acquired by the receiving unit 21, The serving cell is configured to perform quality measurement processing.

Here, when the mobile station UE is operated in “Transmission Mode 9”, the CoMP transmission / reception processing unit 24 may be configured to measure CQI in the serving cell.

Hereinafter, the operation of the mobile communication system according to the present embodiment will be described with reference to FIG.

As shown in FIG. 5, in step S1001, the mobile station UE establishes an RRC connection in the cell # 5 under the radio base station eNB, that is, transitions from the idle state to the connected state.

Here, the mobile station UE may notify the radio base station eNB that it can cope with the CoMP transmission / reception process by “UE Capability”.

In step S1002, the mobile station UE performs a serving cell quality measurement process using the CRS in the serving cell, and transmits a “Measurement Report” including the measurement result to the radio base station eNB.

In addition, when operating in “Transmission Mode 9”, the mobile station UE may measure CQI in the serving cell using CRS in the serving cell and report the measurement result to the radio base station eNB.

In step S1003, the radio base station eNB refers to the “UE Capability” described above, and transmits a “RRC Reconfiguration” including “Measurement Object” to the mobile station UE, thereby performing a normal quality measurement process. Identification information (for example, PCI) and CSI-RS setting information (for example, CSI) of a CoMP transmission / reception processing target candidate (that is, a cell) -RS multiple position etc.).

In step S1004, the mobile station UE performs a quality measurement process on the cell and CoMP transmission point specified by “Measurement Object”.

Here, the mobile station UE performs the quality measurement process of the CoMP transmission point using the CSI-RS at the CoMP transmission point, and reports the measurement result to the radio base station eNB.

In addition, after the CoMP transmission / reception process is started, the mobile station UE uses the CSI-RS at the CoMP transmission point to measure the CQI at the CoMP transmission point, and reports the measurement result to the radio base station eNB. To do.

Further, when the CSI-RS setting information of the serving cell is notified by the “Measurement Object”, the mobile station UE performs the serving cell quality measurement process using the CSI-RS of the serving cell, and the measurement result. Report to the radio base station eNB.

Also, when operating in “Transmission Mode 9”, the mobile station UE may measure CQI in the serving cell using CRS in the serving cell and notify the radio base station eNB of the measurement result.

According to the mobile communication system according to the present embodiment, the mobile station UE uses the identification information of the CoMP transmission point that is the candidate for the CoMP transmission / reception process notified by the “Measurement Object” and the setting information of the CSI-RS. Therefore, the wireless base station eNB cancels the CoMP transmission / reception processing based on the measurement result, because it is configured to perform the quality measurement process of the CoMP transmission point and report the measurement result to the radio base station eNB. It is possible to determine whether or not to perform or which type of CoMP transmission / reception processing is to be started using which CoMP transmission point.

(Modification 1)
Hereinafter, the mobile communication system according to the first modification of the present invention will be described with reference to FIG. 6 and FIG. 7 while focusing on differences from the mobile communication system according to the first embodiment described above.

In the mobile communication system according to the first modification, the transmission unit 11 of the radio base station eNB transmits / receives CoMP to / from the mobile station UE connected to the cell # 5 under the radio base station eNB by “Measurement Object”. It is configured to notify identification information of CoMP transmission points that are candidates for processing, and to notify CSI-RS setting information by “RRC Reconfiguration”.

FIG. 6 shows an example of the format of the information element “PhysicalConfigDedicated” included in the “RRC Reconfiguration”.

Specifically, the information element “csi-RS-Config-r10” in the information element “PhysicalConfigDedicated” included in the “RRC Reconfiguration” illustrated in FIG. 6 is the CSI-RS at the CoMP transmission point to be added as a measurement target. This is an information element for notifying the setting information of CSI-RS to be changed at the CoMP transmission point to be measured (see descriptions C and D).

In addition, the reception unit 21 of the mobile station UE is a candidate for CoMP transmission / reception processing from the radio base station eNB via “Measurement Object” when connected to the cell # 5 under the radio base station eNB. The identification information of the transmission point for CoMP is acquired, and the setting information of CSI-RS is acquired through “RRC Reconfiguration”.

Hereinafter, the operation of the mobile communication system according to the first modification will be described with reference to FIG.

As shown in FIG. 7, in step S2001, the mobile station UE establishes an RRC connection in the cell # 5 under the radio base station eNB, that is, transitions from the idle state to the connected state.

In step S2002, the mobile station UE performs a serving cell quality measurement process using the CRS in the serving cell, and transmits a “Measurement Report” including the measurement result to the radio base station eNB.

In step S2003, the radio base station eNB refers to the “UE Capability” described above, and identifies identification information of a target (frequency or cell) of a normal quality measurement process by using the “Measurement Object” for the mobile station UE. In addition, identification information (for example, PCI) of a CoMP transmission point (that is, a cell) that is a candidate for CoMP transmission / reception processing is notified.

At this stage, the mobile station UE still performs the quality measurement process of the serving cell using the CRS in the serving cell, and transmits “Measurement Report” including the measurement result to the radio base station eNB.

In step S2004, the radio base station eNB notifies the mobile station UE of CSI-RS setting information at the CoMP transmission point by “RRC Reconfiguration”.

In step S2005, using the CSI-RS setting information at the CoMP transmission point notified by “RRC Reconfiguration”, the mobile station UE starts the quality measurement process for the CoMP transmission point specified by “Measurement Object”. To do.

Here, the mobile station UE uses the CSI-RS at the CoMP transmission point notified by the “Measurement Object” and “RRC Reconfiguration” to perform the quality measurement process of the CoMP transmission point, and wirelessly process the measurement result. Report to the base station eNB.

In addition, when the CSI-RS setting information of the serving cell is notified by “Measurement Object” or “RRC Reconfiguration”, the mobile station UE performs the serving cell quality measurement process using the CSI-RS of the serving cell. The measurement result is reported to the radio base station eNB.

According to the mobile communication system according to the first modification, the mobile station UE is notified by the identification information of the CoMP transmission point that is the candidate for the CoMP transmission / reception process notified by the “Measurement Object” and the “RRC Reconfiguration”. Since it is configured to perform the quality measurement process of the CoMP transmission point using the CSI-RS setting information and report the measurement result to the radio base station eNB, the radio base station eNB Based on the above, it is possible to determine whether to start the CoMP transmission / reception process or which type of CoMP transmission / reception process to start using which CoMP transmission point.

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

The first feature of the present embodiment is a mobile communication method, in which the radio base station eNB uses a “Measurement Object (measurement target information)” to the mobile station UE connected to the subordinate cell # 5. A step of notifying setting information of identification information (PCI) and CSI-RS (reference signal for mobile station UE) of CoMP transmission points that are candidates for CoMP (multipoint coordination) transmission / reception processing; And using the notified CoMP transmission point identification information and CSI-RS setting information to start a CoMP transmission point quality measurement process.

A second feature of the present embodiment is a mobile communication method, in which a radio base station eNB performs CoMP transmission / reception processing on a mobile station UE connected to a subordinate cell # 5 using “Measurement Object”. The step of notifying the identification information of the CoMP transmission point that is the target candidate, and the radio base station eNB notifies the mobile station UE of CSI-RS setting information by “RRC Reconfiguration (connection resetting signal)” And a step in which the mobile station UE starts a quality measurement process for the CoMP transmission point using the notified CoMP transmission point identification information and CSI-RS setting information. .

The third feature of the present embodiment is a radio base station eNB that is subject to CoMP transmission / reception processing by a “Measurement Object” for the mobile station UE connected to the cell # 5 under the radio base station eNB. The gist is to include a transmission unit 13 configured to notify identification information of CoMP transmission points that are candidates and CSI-RS setting information.

A fourth feature of the present embodiment is a radio base station eNB, which is subject to CoMP transmission / reception processing by a “Measurement Object” for a mobile station UE connected to cell # 5 under the radio base station eNB. The gist of the present invention is to include a transmission unit 13 configured to notify identification information of a candidate CoMP transmission point and to notify CSI-RS setting information by “RRC Reconfiguration”.

The fifth feature of the present embodiment is that the mobile station UE is connected to the cell # 5 under the radio base station eNB, and transmits / receives CoMP from the radio base station eNB via “Measurement Object”. The receiving unit 21 configured to acquire the identification information of the CoMP transmission point and the CSI-RS setting information that are candidates for processing, and the acquired identification information of the CoMP transmission point and the setting of the CSI-RS The gist of the present invention is to include a CoMP transmission / reception processing unit 24 configured to start a quality measurement process of a CoMP transmission point using information.

A sixth feature of the present embodiment is that the mobile station UE is connected to the cell # 5 under the radio base station eNB, and receives CoMP transmission / reception from the radio base station eNB via “Measurement Object”. A receiving unit 21 configured to acquire identification information of a CoMP transmission point that is a candidate for processing and acquire CSI-RS setting information via “RRC Reconfiguration”, and the acquired CoMP The gist of the present invention is to include a CoMP transmission / reception processing unit 24 configured to start quality measurement processing of a CoMP transmission point using transmission point identification information and CSI-RS setting information.

Note that the operations of the radio base station eNB and the mobile station UE 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. .

Software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, and Hard Disk). Alternatively, it may be provided in an arbitrary format storage medium such as a CD-ROM.

The 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 radio base station eNB or the mobile station UE. Further, the storage medium and the processor may be provided as a discrete component in the radio base station eNB or the mobile station UE.

As described above, the present invention has been described in detail using the above-described embodiments. However, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described in the present 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.

Note that the entire content of Japanese Patent Application No. 2011-219617 (filed on October 3, 2011) is incorporated herein by reference.

As described above, according to the present invention, it is possible to provide a mobile communication method, a radio base station, and a mobile station that provide a mechanism for appropriately starting quality measurement processing of a CoMP transmission point.

eNB ... radio base station UE ...

mobile station

11, 23 ... transmitting

unit

12, 21 ... receiving

unit

13, 24 ... CoMP transmission / reception processing unit 22 ... measuring unit

Claims

Based on the measurement target information, the wireless base station connects to the mobile station connected to the subordinate cell, based on the measurement target information, identification information of a transmission point that is a candidate for multipoint coordinated transmission / reception processing, and reference signal setting information for the mobile station And a step of notifying
The mobile station has a step of using the notified identification information of the transmission point and the setting information of the reference signal for the mobile station to start a quality measurement process of the transmission point. Method.
The step of notifying the mobile station connected to the subordinate cell of the identification information of the transmission point that is the candidate for the multipoint coordinated transmission / reception process, by the measurement target information, to the radio base station,
The radio base station notifying the mobile station of setting information of a reference signal for the mobile station by a connection resetting signal;
The mobile station has a step of using the notified identification information of the transmission point and the setting information of the reference signal for the mobile station to start a quality measurement process of the transmission point. Method.
A wireless base station,
For mobile stations connected to cells under the radio base station, identification information of transmission points that are candidates for multipoint coordinated transmission / reception processing and setting information of reference signals for the mobile stations are determined according to measurement target information. A radio base station comprising a transmitter configured to notify.
A wireless base station,
The mobile station connected to the cell under the radio base station is notified of the identification information of the transmission point that is the candidate for multipoint coordinated transmission / reception processing by the measurement target information, and the mobile station is connected by the connection reset signal. A radio base station comprising a transmitter configured to notify setting information of a reference signal for a station.
A mobile station,
When connected to a cell subordinate to a radio base station, identification information of a transmission point that is a candidate for multipoint coordinated transmission / reception processing and a reference signal for the mobile station from the radio base station via measurement target information A receiver configured to obtain the setting information of
A processing unit configured to start the quality measurement process of the transmission point using the acquired identification information of the transmission point and the setting information of the reference signal for the mobile station. Mobile station to be.
A mobile station,
When connected to a cell under the control of a radio base station, identification information of a transmission point that is a candidate for multipoint coordinated transmission / reception processing is acquired from the radio base station via measurement target information, and a connection reset signal Via a receiver configured to obtain reference signal setting information for the mobile station;
A processing unit configured to start the quality measurement process of the transmission point using the acquired identification information of the transmission point and the setting information of the reference signal for the mobile station. Mobile station to be.