WO2013051506A1 - Station mobile - Google Patents

Station mobile Download PDF

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Publication number
WO2013051506A1
WO2013051506A1 PCT/JP2012/075386 JP2012075386W WO2013051506A1 WO 2013051506 A1 WO2013051506 A1 WO 2013051506A1 JP 2012075386 W JP2012075386 W JP 2012075386W WO 2013051506 A1 WO2013051506 A1 WO 2013051506A1
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WO
WIPO (PCT)
Prior art keywords
mobile station
measurement
comp transmission
quality
serving cell
Prior art date
Application number
PCT/JP2012/075386
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English (en)
Japanese (ja)
Inventor
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 (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社エヌ・ティ・ティ・ドコモ filed Critical 株式会社エヌ・ティ・ティ・ドコモ
Publication of WO2013051506A1 publication Critical patent/WO2013051506A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • the present invention relates to a mobile station.
  • 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.
  • 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.
  • RRE Remote Radio Equipment
  • the current LTE method has a problem that a method for determining whether to start such CoMP transmission / reception processing is not defined.
  • the present invention has been made in view of the above-described problems, and an object thereof is to provide a mobile station that provides a mechanism for appropriately determining whether to start CoMP transmission / reception processing. .
  • a first feature of the present invention is a mobile station, and based on an instruction from a radio base station that manages the serving cell of the mobile station, a reference code for each cell is used to specify the first in each serving cell and neighboring cells.
  • a measurement unit configured to measure one radio quality and measure a second radio quality at a CoMP transmission point that is a candidate for multipoint coordinated transmission / reception processing using the reference code for the mobile station;
  • a transmitter configured to transmit a measurement report including the measurement result of the second radio quality in addition to the measurement result of the first radio quality.
  • 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 illustrating an example of a format of an information element “Measurement Result” included in “Measurement Report” transmitted by the radio base station according to the first embodiment of the present invention.
  • FIG. 4 is a flowchart for explaining the operation of the mobile station according to the first embodiment 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.
  • 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 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)”.
  • 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.
  • 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.
  • CQI channel quality information
  • CS / CB is a process for coordinating scheduling and beamforming between the serving cell and the neighboring cells.
  • the mobile communication system 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.
  • 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).
  • CSI-RS Channel State Reference Signal
  • CRS Cell Specific Reference Signal
  • 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.
  • 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.
  • RRC Radio Resource Control
  • the CSI-RS may be used for quality measurement processing such as a CoMP transmission point (CoMP transmission / reception processing target candidate), a serving cell, a neighboring cell (handover destination candidate), and the CoMP transmission / reception processing is performed. It may be used to measure CQI at a CoMP transmission point or a serving cell.
  • 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.
  • 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 decision can be made as to whether the RSs are the same or different.
  • the CSI-RS arrangement density is configured to be lower than the CRS arrangement density.
  • 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
  • the mobile station UE includes a receiving unit 11, a measuring unit 12, and a transmitting unit 13.
  • the receiving unit 11 is configured to receive various signals from the radio base station eNB that manages the serving cell (cell # 5).
  • the reception unit 11 is configured to acquire identification information of a target (frequency or cell) of a normal quality measurement process (measurement) from the above-described radio base station eNB via a “Measurement Object”.
  • the reception unit 11 is configured to acquire, from the above-described radio base station eNB, the identification information of the CoMP transmission point and the CSI-RS setting information that are candidates for the CoMP transmission / reception process via an RRC message or the like. Has been.
  • the measurement unit 12 uses the CoMP transmission point identification information and the CSI-RS setting information acquired by the reception unit 11, 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.
  • the measurement unit 12 is configured to perform quality measurement processing of neighboring cells and serving cells specified by “Measurement Object” using CRS.
  • the measurement unit 12 is further configured to perform Pcell and Scell quality measurement processing.
  • the measurement unit 12 uses the CRS to perform a serving cell quality measurement process (for example, a quality measurement process for use in determining whether to perform handover). Or may be configured to perform serving cell quality measurement processing (quality measurement processing used in CoMP transmission / reception processing) using CSI-RS.
  • a serving cell quality measurement process for example, a quality measurement process for use in determining whether to perform handover.
  • serving cell quality measurement processing quality measurement processing used in CoMP transmission / reception processing
  • the measurement unit 12 uses the CRS to perform a serving cell quality measurement process (for example, a quality measurement process for use in determining whether to perform handover) even after the CoMP transmission / reception process is started.
  • a serving cell quality measurement process for example, a quality measurement process for use in determining whether to perform handover
  • the measurement unit 12 may be configured to perform serving cell quality measurement processing (quality measurement processing used in CoMP transmission / reception processing) using CSI-RS.
  • the transmission unit 13 is configured to transmit various signals to the radio base station eNB.
  • the transmission unit 13 adds, to the above-described radio base station eNB, the result of the quality measurement process (first radio quality measurement result) of the neighboring cell and serving cell specified by “Measurement Object”.
  • the “Measurement Report” including the result of the quality measurement process (second radio quality measurement result) of the CoMP transmission point that is the candidate for the CoMP transmission / reception process is transmitted.
  • FIG. 3 shows an example of the format of the information element “Measurement Result” included in the “Measurement Report”.
  • the information element “MeasResultCompTpList” in the “Measurement Result” shown in FIG. 3 is an information element for reporting the result of the quality measurement process of the CoMP transmission point that is the candidate for the CoMP transmission / reception process (description A reference).
  • the transmission unit 13 transmits the above-described first radio quality measurement result (Pcell quality measurement process) to the above-described radio base station eNB.
  • a “Measurement Report” including the result of the Scell quality measurement process (the measurement result of the third radio quality) may be transmitted.
  • the information element “measResultScell-r10” in “Measurement Result” shown in FIG. 3 is an information element for reporting the result of the quality measurement process of Scell (see description B).
  • step S101 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.
  • step S102 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.
  • the mobile station UE when the communication by the carrier aggregation is started, the mobile station UE performs the Scell quality measurement process in addition to the Pcell quality measurement process, and includes the “Measurement Report” including the measurement result for the radio base station eNB. ".
  • the mobile station UE when operating in “Transmission Mode 9”, the mobile station UE measures CQI in the serving cell using CSI-RS in the serving cell, and reports the measurement result to the radio base station eNB. Good.
  • the mobile station UE sets the CSI-RS at the CoMP transmission point at step S104. Then, the quality measurement processing of the transmission point for CoMP is performed, and “Measurement Report” including the measurement result is transmitted.
  • the “Measurement Report” includes the result of the quality measurement process of the serving cell (the result of the Pcell quality measurement process) and the result of the quality measurement process of the Scell in addition to the result of the quality measurement process of the transmission point for CoMP. Shall be.
  • 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.
  • the mobile station UE may perform the serving cell quality measurement process using the CSI-RS of the serving cell.
  • the mobile station UE uses the “Measurement Report” to the radio base station eNB, the result of the quality measurement process of the serving cell (the result of the Pcell quality measurement process), and the Scell
  • the radio base station eNB is configured to report the result of the quality measurement process of the CoMP transmission point that is the candidate for the CoMP transmission / reception process. Whether to start the CoMP transmission / reception process or which type of CoMP transmission / reception process to start using which CoMP transmission point can be determined.
  • the first feature of the present embodiment is a mobile station UE, which uses a CRS (reference code for each cell) based on an instruction from a radio base station eNB that manages the serving cell of the mobile station UE.
  • the first radio quality is measured in the serving cell and the neighboring cells, and the second at the CoMP transmission point that is the target candidate for the CoMP transmission / reception process (multipoint coordinated transmission / reception process) using CSI-RS (reference code for mobile station).
  • the measurement unit 12 configured to measure the radio quality is configured to transmit a “Measurement Report” including the measurement result of the second radio quality in addition to the measurement result of the first radio quality.
  • the gist of the present invention is that the transmitter 13 is provided.
  • the measurement unit 12 is configured to measure the third radio quality in the Scell in the carrier aggregation using the CRS based on the instruction from the radio base station eNB.
  • the transmission unit 13 may be configured to transmit “Measurement Report” including the measurement result of the third radio quality in addition to the measurement result of the first radio quality and the measurement result of the second radio quality.
  • 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.
  • eNB radio base station UE ... mobile station 11 ... reception unit 12 ... measurement unit 13 ... transmission unit

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un mécanisme qui permet de déterminer de manière appropriée s'il faut lancer ou non un processus d'émission/réception CoMP. Cette station mobile (UE) comporte : une unité de mesure (12) configurée pour mesurer, à l'aide du CRS, une première qualité sans fil dans la cellule de desserte de la station mobile (UE) et des cellules périphériques sur la base d'une instruction provenant d'une station de base sans fil (eNB) qui gère ladite cellule de desserte de la station mobile (UE), et pour mesurer, à l'aide du CSI-RS, une seconde qualité sans fil d'un point de transmission CoMP qui est un candidat pour effectuer un processus d'émission/réception CoMP ; une unité d'émission (13) configurée pour envoyer un « rapport de mesure » comprenant le résultat de mesure de la seconde qualité sans fil en plus du résultat de mesure de la première qualité sans fil.
PCT/JP2012/075386 2011-10-03 2012-10-01 Station mobile WO2013051506A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011219651A JP5864191B2 (ja) 2011-10-03 2011-10-03 移動局
JP2011-219651 2011-10-03

Publications (1)

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WO2013051506A1 true WO2013051506A1 (fr) 2013-04-11

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PCT/JP2012/075386 WO2013051506A1 (fr) 2011-10-03 2012-10-01 Station mobile

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011078019A (ja) * 2009-10-01 2011-04-14 Sharp Corp 移動局装置、基地局装置、無線通信システム、通信方法、および制御プログラム

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011078019A (ja) * 2009-10-01 2011-04-14 Sharp Corp 移動局装置、基地局装置、無線通信システム、通信方法、および制御プログラム

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NTT DOCOMO: "RRM measurement set management for Rel-11 CoMP", 3GPP TSG RAN WG1 MEETING #66BIS R1-113295, 14 October 2011 (2011-10-14), XP050538399 *

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Publication number Publication date
JP5864191B2 (ja) 2016-02-17
JP2013081049A (ja) 2013-05-02

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