WO2011099630A1 - 移動通信方法、無線基地局及び移動局 - Google Patents
移動通信方法、無線基地局及び移動局 Download PDFInfo
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- WO2011099630A1 WO2011099630A1 PCT/JP2011/053169 JP2011053169W WO2011099630A1 WO 2011099630 A1 WO2011099630 A1 WO 2011099630A1 JP 2011053169 W JP2011053169 W JP 2011053169W WO 2011099630 A1 WO2011099630 A1 WO 2011099630A1
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- Prior art keywords
- carrier
- uplink
- base station
- radio base
- mobile station
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
-
- 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
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
Definitions
- the present invention relates to a mobile communication method, a radio base station, and a mobile station.
- LTE Long Term Evolution
- one DL (Downlink) carrier and one UL (Uplink) carrier make a pair.
- An LTE mobile communication system can be operated using a plurality of DL carriers and UL carriers, but the correspondence between DL carriers and UL carriers is one-to-one.
- the mobile station UE is configured to use only one DL carrier and UL carrier pair at a temporary point of communication with the radio base station eNB via a radio link. ing.
- the mobile station UE in the IDLE (standby) state is configured to select a DL carrier to wait for in accordance with a cell selection operation defined in TS36.304 of 3GPP.
- the mobile station UE is configured to identify the UL carrier that is paired with the DL carrier from broadcast information (specifically, SIB2) in the DL carrier that is waiting.
- broadcast information specifically, SIB2
- the mobile station UE transits from the IDLE state to the CONNECTED (connected) state, the mobile station UE is configured to establish a radio link with the waiting DL carrier and the UL carrier paired with the DL carrier. Has been.
- the radio base station eNB transmits a layer 3 (RRC: Radio Resource Control) message for each mobile station UE to the connected mobile station UE at a predetermined timing, thereby establishing a DL carrier and UL for establishing a radio link.
- RRC Radio Resource Control
- the carrier pair can be changed.
- an uplink radio resource allocation procedure and a data transmission / reception procedure using PDCCH (Physical Downlink Control Channel) terminated in the layer 1 / MAC sublayer are defined.
- the radio resource scheduler of the radio base station eNB determines a PUSCH (Physical Uplink Shared Channel) resource in the UL carrier to be allocated to each mobile station UE, and uses the PDCCH using the DL carrier paired with the UL carrier. This determination content is notified to each mobile station UE to which the PUSCH resource is allocated by (UL grant).
- PUSCH Physical Uplink Shared Channel
- the minimum time unit for allocating the PUSCH resource is “subframe (TTI: Transmission Time Interval), and the radio base station eNB determines the mobile station UE to which the PUSCH resource is allocated for each subframe (TTI). Using PDCCH (UL grant), the determined content is notified to the corresponding mobile station UE.
- TTI Transmission Time Interval
- PDCCH UL grant
- the minimum frequency unit for allocating PUSCH resources in the UL carrier bandwidth is “RB (Resource Block)”.
- the PDCCH transmitted to each mobile station UE is transmitted with its CRC portion masked by a unique identifier (C-RNTI) assigned in advance to each mobile station UE.
- C-RNTI unique identifier
- PDCCH UL grant
- UL grant carries information on the RB allocated to the mobile station UE in the subframe (TTI), the size of the TB (Transport Block) to be generated by the mobile station UE, and the like.
- each mobile station UE tries to detect a PDCCH (UL grant) in a DL carrier used by each mobile station UE for each subframe (TTI), and succeeds in decoding PDCCH (“CRC: When “OK” is detected), the uplink data signal is transmitted using the PUSCH resource designated by the PDCCH using the UL carrier used by itself (the UL carrier paired with the DL carrier).
- PDCCH UL grant
- TTI subframe
- the mobile station UE since the mobile station UE tries to unmask the CRC portion of the PDCCH using the C-RNTI assigned to itself, in the case of a PDCCH assigned to another mobile station UE, the CRC masking is released. As a result, the mobile station UE can determine that the PDCCH that becomes “CRC: OK” is allocated to itself as a result of decoding the PDCCH. Yes.
- the LTE-A system is currently being studied and specified in 3GPP for the purpose of further improving frequency utilization efficiency from the LTE system, improving peak throughput, and shortening transmission delay.
- CA Carrier Aggregation
- the LTE-A scheme has been studied so that it can be operated as the same system while maintaining backward compatibility with the LTE scheme.
- the DL carrier is paired with the UL carrier specified from the broadcast information (SIB2) in the DL carrier.
- SIB2 broadcast information
- the number of DL carriers provided as a system or the number of DL carriers supported as an implementation of the mobile station UE is larger than the number of UL carriers. The scenario is emphasized.
- the correspondence between the DL carrier and UL carrier specified from the broadcast information (SIB2) in the DL carrier is also 1: 1.
- SIB2 broadcast information
- 3GPP TS36.304 3GPP TS36.300 3GPP TS 36.912
- PDCCH UL grant
- the radio base station eNB transmits a PDCCH (UL grant) (that is, the mobile station UE detects a PDCCH (UL grant)), and a UL carrier to which PUSCH resources are allocated by the PDCCH (UL grant).
- PRCCH (UL grant) is operated in the system if the cell-specific correspondence (Cell specific pair) specified by the broadcast information (SIB2) in the DL carrier is adopted as the corresponding relationship (paring) There is a problem that it cannot be distributed over a plurality of DL carriers.
- the PDCCH (UL grant) that allocates the PUSCH resource in the UL carrier # 2 is distributed to the DL carrier # 2 and the DL carrier # 3, but the PDCCH (UL that allocates the PUSCH resource in the UL carrier # 1) grant) all need to be transmitted on DL carrier # 1.
- the present invention has been made in view of the above-described problems, and when CA is performed, a mobile communication method, a radio base station, and a mobile base station that can disperse PDCCH (UL grant) to a plurality of DL carriers
- the purpose is to provide a station.
- a first feature of the present invention is a mobile communication method in which a mobile station performs communication using a plurality of carriers having different carrier frequencies with a radio base station, and the radio base station performs the communication.
- the process B transmits an uplink data signal using the uplink resource on the uplink carrier; It is summarized as having.
- a second feature of the present invention is a radio base station, wherein an uplink assignment signal is transmitted to a mobile station that performs communication using a plurality of carriers having different carrier frequencies with the radio base station.
- the gist of the invention is to include a transmission unit configured to individually notify a correspondence relationship between a downlink carrier to be transmitted and an uplink carrier to which an uplink resource is allocated by the uplink allocation signal.
- a third feature of the present invention is a mobile station configured to be able to perform communication using a plurality of carriers having different carrier frequencies with a radio base station, from the radio base station, A receiver configured to receive a correspondence relationship between a downlink carrier that transmits an uplink allocation signal and an uplink carrier to which an uplink resource is allocated by the uplink allocation signal; and A transmission unit configured to transmit an uplink data signal using the uplink resource in the uplink carrier based on the correspondence relationship when an uplink allocation signal is received.
- a mobile communication method 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 can distribute PDCCH (UL grant) to a plurality of DL carriers when CA is performed. it can.
- PDCCH UL grant
- FIG. 3 is a functional block diagram of a radio base station according to the first embodiment of the present invention.
- FIG. 3 is a functional block diagram of a mobile station according to the first embodiment of the present invention. It is a figure for demonstrating the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating a general mobile communication system. It is a figure for demonstrating a general mobile communication system. It is a figure for demonstrating a general mobile communication system. It is a figure for demonstrating a general mobile communication system. It is a figure for demonstrating a general mobile communication system. It is a figure for demonstrating a general mobile communication system. It is a figure for demonstrating a general mobile communication system.
- the radio base eNB includes a scheduling unit 11 and a transmission unit 12.
- the mobile station UE As shown in FIG. 2, the mobile station UE according to the present embodiment A unit 21 and a transmission unit 22 are provided.
- two UL carriers # 1 to # 2 and three DL carriers # 1 to # 3 are provided.
- the transmission unit 12 of the radio base station eNB uses a DL carrier that transmits “UL grant” and “UL grant” in advance to the mobile station UE that performs CA. It is configured to individually notify the correspondence relationship with the UL carrier to which the PUSCH resource is allocated.
- the transmission unit 12 of the radio base station eNB may be configured to notify the correspondence relationship by an RRC message or PDCCH.
- the transmission unit 12 of the radio base station eNB corresponds to the mobile station UE # 1 that performs CA, the correspondence relationship indicating that the UL carrier # 1 and the DL carrier # 1 form a pair ( UE # 1 dedicated pair, UE # 1 specific pair), and correspondence relationship indicating that UL carrier # 2 and DL carriers # 2 to # 3 form a pair (UE # 1 dedicated pair, UE # 1 specific pair) Is configured to notify.
- the transmission unit 12 of the radio base station eNB corresponds to the mobile station UE # 2 performing CA, a correspondence relationship indicating that the UL carrier # 1 and the DL carriers # 1 to # 2 form a pair (UE # 2 dedicated pair, UE # 2 specific pair), and correspondence relationship indicating that UL carrier # 2 and DL carrier # 3 form a pair (UE # 2 dedicated pair, UE # 2 specific pair) It is configured.
- the transmission unit 12 of the radio base station eNB corresponds to the mobile station UE # 3 performing CA, a correspondence relationship indicating that the UL carrier # 1 and the DL carrier # 1 / # 3 form a pair (UE # 3 dedicated pair, UE # 3 specific pair), and correspondence indicating that UL carrier # 2 and DL carrier # 2 form a pair (UE # 3 dedicated pair, UE # 3 specific pair) It is configured.
- the receiving unit 21 of the mobile station UE receives a PDCCH (UL grant) in a certain DL carrier
- the PUSCH resource specified by the PDCCH (UL grant) is assigned to the UL carrier that forms a pair with the DL carrier. And configured to transmit an uplink data signal.
- PDCCH UL grant
- a first feature of the present embodiment is a mobile communication method in which the mobile station UE performs communication (CA) using a plurality of carriers having different carrier frequencies with the radio base station eNB, and the radio base station eNB However, a DL carrier (downlink carrier) that transmits “UL grant (uplink assignment signal)” and a PUSCH resource (uplink resource) are assigned by “UL grant” to the mobile station UE that performs CA.
- a DL carrier downlink carrier
- UL grant uplink assignment signal
- PUSCH resource uplink resource
- the radio base station eNB may notify the above-described correspondence relationship by an RRC message.
- the second feature of the present embodiment is that the radio base station eNB is “UL” for the mobile station UE performing CA using a plurality of carriers having different carrier frequencies with the radio base station eNB.
- the gist is to include a transmission unit 11 configured to individually notify a correspondence relationship between a DL carrier that transmits “grant” and a UL carrier to which a PUSCH resource is allocated by “UL grant”.
- the transmission unit 11 may be configured to notify the correspondence relationship described above by an RRC message.
- a third feature of the present embodiment is a mobile station UE configured to perform CA using a plurality of carriers having different carrier frequencies with the radio base station eNB, and the radio base station From the eNB, a receiving unit 21 configured to receive a correspondence relationship between a DL carrier that transmits “UL grant” and a UL carrier to which a PUSCH resource is allocated by “UL grant”, and a transmission unit 22 configured to transmit an uplink data signal using the PUSCH resource in the UL carrier based on the above-described correspondence relationship when receiving “grant”. .
- 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. .
- 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 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 and the radio base station eNB. Further, the storage medium and the processor may be provided in the mobile station UE and the radio base station eNB as discrete components.
- a mobile communication method 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 can distribute PDCCH (UL grant) to a plurality of DL carriers when CA is performed. it can.
- PDCCH UL grant
- eNB ... radio base station 11 . scheduling unit 12 ... transmitting unit UE ... mobile station 21 ... receiving unit 22 ... transmitting unit
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Abstract
Description
図1乃至図3を参照して、本発明の第1の実施形態に係る移動通信システムの構成について説明する。
11…スケジューリング部
12…送信部
UE…移動局
21…受信部
22…送信部
Claims (5)
- 移動局が、無線基地局との間で搬送波周波数が異なる複数のキャリアを用いた通信を行う移動通信方法であって、
前記無線基地局が、前記通信を行っている前記移動局に対して、上りリンク割り当て信号を送信する下りリンクキャリアと、該上りリンク割り当て信号によって上りリンクリソースが割り当てられる上りリンクキャリアとの対応関係を個別に通知する工程Aと、
前記移動局が、前記下りリンクキャリアにおいて前記上りリンク割り当て信号を受信した場合に、前記対応関係に基づいて、前記上りリンクキャリアにおいて前記上りリンクリソースを用いて上りリンクデータ信号を送信する工程Bとを有することを特徴とする移動通信方法。 - 前記工程Aにおいて、前記無線基地局は、RRCメッセージによって、前記対応関係を通知することを特徴とする請求項1に記載の移動通信方法。
- 無線基地局であって、
前記無線基地局との間で搬送波周波数が異なる複数のキャリアを用いた通信を行っている移動局に対して、上りリンク割り当て信号を送信する下りリンクキャリアと、該上りリンク割り当て信号によって上りリンクリソースが割り当てられる上りリンクキャリアとの対応関係を個別に通知するように構成されている送信部を具備することを特徴とする無線基地局。 - 前記送信部は、RRCメッセージによって、前記対応関係を通知するように構成されていることを特徴とする請求項3に記載の無線基地局。
- 無線基地局との間で搬送波周波数が異なる複数のキャリアを用いた通信を行うことができるように構成されている移動局であって、
前記無線基地局から、上りリンク割り当て信号を送信する下りリンクキャリアと、該上りリンク割り当て信号によって上りリンクリソースが割り当てられる上りリンクキャリアとの対応関係を受信するように構成されている受信部と、
前記下りリンクキャリアにおいて前記上りリンク割り当て信号を受信した場合に、前記対応関係に基づいて、前記上りリンクキャリアにおいて前記上りリンクリソースを用いて上りリンクデータ信号を送信するように構成されている送信部とを具備することを特徴とする移動局。
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US13/579,167 US8867470B2 (en) | 2010-02-15 | 2011-02-15 | Mobile communication method, radio base station, and mobile station |
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JP2010030753A JP5243470B2 (ja) | 2010-02-15 | 2010-02-15 | 移動通信方法、無線基地局及び移動局 |
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US9306661B2 (en) * | 2011-09-29 | 2016-04-05 | Kyocera Corporation | Mobile communication system, base station, and user terminal |
WO2014016870A1 (ja) | 2012-07-24 | 2014-01-30 | 富士通株式会社 | 無線端末、無線基地局、無線通信システムおよび無線通信方法 |
JP6486001B2 (ja) * | 2013-12-25 | 2019-03-20 | キヤノン株式会社 | Ad変換器、ad変換装置、光電変換装置、撮像システム、およびad変換方法 |
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US9203595B2 (en) * | 2008-10-22 | 2015-12-01 | Lg Electronics Inc. | Efficient initial access system under a multi-carrier combination condition for supporting broadband |
US9247532B2 (en) * | 2009-01-02 | 2016-01-26 | Lg Electronics Inc. | Effective method for transmitting control information during the combination of multiple carriers for wideband support |
US20100215011A1 (en) * | 2009-02-26 | 2010-08-26 | Interdigital Patent Holdings, Inc. | Method and apparatus for switching a resource assignment mode for a plurality of component carriers |
US8724571B2 (en) * | 2009-04-20 | 2014-05-13 | Lg Electronics Inc. | Carrier construction for effective control channel decoding |
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Non-Patent Citations (2)
Title |
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LG ELECTRONICS: "Considerations on DL/UL Transmission in Asymmetric Carrier Aggregation", 3GPP TSG RAN WG1 MEETING #56, R1-090781, 13 February 2009 (2009-02-13), pages 1 - 4 * |
PANASONIC: "Further discussion on PDCCH with cross carrier operation", 3GPP TSG-RAN WG1 MEETING #59BIS, R1-100361, 22 January 2010 (2010-01-22), pages 1 - 6 * |
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JP2011166712A (ja) | 2011-08-25 |
US8867470B2 (en) | 2014-10-21 |
JP5243470B2 (ja) | 2013-07-24 |
US20130039306A1 (en) | 2013-02-14 |
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