JP5478094B2 - 無線基地局 - Google Patents
無線基地局 Download PDFInfo
- Publication number
- JP5478094B2 JP5478094B2 JP2009054906A JP2009054906A JP5478094B2 JP 5478094 B2 JP5478094 B2 JP 5478094B2 JP 2009054906 A JP2009054906 A JP 2009054906A JP 2009054906 A JP2009054906 A JP 2009054906A JP 5478094 B2 JP5478094 B2 JP 5478094B2
- Authority
- JP
- Japan
- Prior art keywords
- cqi
- downlink signal
- base station
- radio base
- reception quality
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 claims description 57
- 238000012545 processing Methods 0.000 claims description 40
- 230000003044 adaptive effect Effects 0.000 claims description 23
- 238000012935 Averaging Methods 0.000 claims description 2
- 238000012790 confirmation Methods 0.000 claims description 2
- 238000010295 mobile communication Methods 0.000 description 19
- 230000006978 adaptation Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 description 1
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0634—Antenna weights or vector/matrix coefficients
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Mobile Radio Communication Systems (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Radio Transmission System (AREA)
Description
図1乃至図6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。
以下、図7を参照して、本実施形態に係る移動通信システムの動作について、具体的には、本実施形態に係る無線基地局eNBの動作について説明する。
本発明の第1の実施形態に係る移動通信システムによれば、MIMO方式が適用されている場合に、第1下り信号に対して適用されるランクが「1」以外になった場合であっても、移動局UEから報告されたCQIを調整することによって、第2下り信号に対して、適切な適応変復調処理及び送信電力制御処理を施すことができる。
11…CQI受信部
12…スケジューリング処理部
13、15…適応変復調処理部
14…CQI調整部
16…送信電力制御処理部
17…ランク制御部
18…送信モード制御部
Claims (9)
- MIMO方式を用いて、移動局に対して、送信ストリーム数が適応的に可変となる第1下り信号及び送信ストリーム数が固定的に1である第2下り信号を同時に送信することができる無線基地局であって、
前記移動局によって送信された前記第1下り信号の各送信ストリームの受信品質を示す情報を受信するように構成されている受信品質受信部と、
前記第1下り信号のストリーム数に基づいて、前記受信品質を示す情報の調整値を算出するように構成されている受信品質調整部と、
算出された調整値に基づいて、前記第2下り信号についての適応変復調処理及び送信電力制御処理を行うように構成されている処理部とを具備し、
前記第1下り信号のストリーム数が1である場合、前記受信品質に基づいて前記第2下り信号についての適応変復調処理及び送信電力制御処理を行い、
前記第1下り信号のストリーム数が1以外である場合、前記算出された調整値に基づいて前記第2下り信号についての適応変復調処理及び送信電力制御処理を行うことを特徴とする無線基地局。 - 前記第1下り信号のストリーム数が複数である場合、前記受信品質調整部は、受信した前記受信品質を示す情報のうちの最も大きいもの又は最も小さいもののいずれかを前記調整値として選択するように構成されていることを特徴とする請求項1に記載の無線基地局。
- 前記第1下り信号のストリーム数が複数である場合、前記受信品質調整部は、受信した前記受信品質を示す情報を合計することによって、前記調整値を算出するように構成されていることを特徴とする請求項1に記載の無線基地局。
- 前記第1下り信号のストリーム数が複数である場合、前記受信品質調整部は、受信した前記受信品質を示す情報を平均することによって、前記調整値を算出するように構成されていることを特徴とする請求項1に記載の無線基地局。
- 前記第1下り信号のストリーム数が複数である場合、前記受信品質調整部は、受信した前記受信品質を示す情報のいずれか1つに対して所定オフセット値を加えることによって、前記調整値を算出するように構成されていることを特徴とする請求項1に記載の無線基地局。
- 前記第1下り信号のストリーム数が複数である場合、前記受信品質調整部は、受信した前記受信品質を示す情報の合計値に対して所定オフセット値を加えることによって、前記調整値を算出するように構成されていることを特徴とする請求項1に記載の無線基地局。
- 前記第1下り信号のストリーム数が複数である場合、前記受信品質調整部は、受信した前記受信品質を示す情報の平均値に対して所定オフセット値を加えることによって、前記調整値を算出するように構成されていることを特徴とする請求項1に記載の無線基地局。
- 前記第1下り信号は、物理下り共有チャネルを介してシステム帯域全体に渡って送信される下り参照信号であることを特徴とする請求項1乃至7のいずれか一項に記載の無線基地局。
- 前記第2下り信号は、物理下り制御チャネルを介して送信される下り制御信号、物理HARQインディケータチャネルを介して送信される送達確認信号、物理制御フォーマットインディケータチャネルを介して送信される制御フォーマット信号、又は、物理下り共有チャネルを介して送信されるセミパーシステントスケジューリング適用時の下りデータ信号の少なくとも1つであることを特徴とする請求項1乃至8のいずれか一項に記載の無線基地局。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009054906A JP5478094B2 (ja) | 2009-03-09 | 2009-03-09 | 無線基地局 |
CN2010800112276A CN102349326A (zh) | 2009-03-09 | 2010-03-03 | 无线基站 |
EP10750719A EP2408231A1 (en) | 2009-03-09 | 2010-03-03 | Wireless base station |
PCT/JP2010/053401 WO2010103965A1 (ja) | 2009-03-09 | 2010-03-03 | 無線基地局 |
US13/255,374 US20120026960A1 (en) | 2009-03-09 | 2010-03-03 | Radio base station |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009054906A JP5478094B2 (ja) | 2009-03-09 | 2009-03-09 | 無線基地局 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010212856A JP2010212856A (ja) | 2010-09-24 |
JP5478094B2 true JP5478094B2 (ja) | 2014-04-23 |
Family
ID=42728255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009054906A Active JP5478094B2 (ja) | 2009-03-09 | 2009-03-09 | 無線基地局 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120026960A1 (ja) |
EP (1) | EP2408231A1 (ja) |
JP (1) | JP5478094B2 (ja) |
CN (1) | CN102349326A (ja) |
WO (1) | WO2010103965A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8804671B2 (en) * | 2010-07-15 | 2014-08-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for determining UE mobility status |
JP5335748B2 (ja) * | 2010-09-28 | 2013-11-06 | Kddi株式会社 | 基地局装置およびプログラム |
US9107091B2 (en) * | 2011-05-23 | 2015-08-11 | Mediatek Inc. | Method and apparatus reporting channel quality indicator of communication system |
US20140045507A1 (en) * | 2012-08-07 | 2014-02-13 | Chandra Sekhar Bontu | Code rate adaptation in wireless communication systems |
US20140045508A1 (en) * | 2012-08-07 | 2014-02-13 | Chandra Sekhar Bontu | Code rate adaptation in wireless communication systems |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8599945B2 (en) * | 2005-06-16 | 2013-12-03 | Qualcomm Incorporated | Robust rank prediction for a MIMO system |
US8077654B2 (en) * | 2005-08-22 | 2011-12-13 | Qualcomm Incorporated | Auxiliary FL MIMO pilot transmission in 1XEV-DO |
US8483761B2 (en) * | 2006-01-18 | 2013-07-09 | Intel Corporation | Singular value decomposition beamforming for a multiple-input-multiple-output communication system |
EP1981198B1 (en) * | 2006-02-02 | 2017-06-28 | Fujitsu Limited | Radio transmitting method, radio transmitter and radio receiver |
JP5006001B2 (ja) * | 2006-08-22 | 2012-08-22 | 株式会社エヌ・ティ・ティ・ドコモ | 下りリンクmimo伝送制御方法および基地局装置 |
CN102739602B (zh) * | 2007-08-14 | 2016-03-16 | 株式会社Ntt都科摩 | 接收装置和数据取得方法 |
KR101392342B1 (ko) * | 2007-08-17 | 2014-05-08 | 삼성전자주식회사 | 다중 입/출력 통신 방법 및 이를 이용한 다중 입출/력 통신시스템 |
JP5222517B2 (ja) * | 2007-10-01 | 2013-06-26 | 株式会社エヌ・ティ・ティ・ドコモ | 補正テーブルを作成する方法及び装置 |
KR101505687B1 (ko) * | 2007-11-05 | 2015-03-31 | 엘지전자 주식회사 | 무선통신 시스템에서 전력제어 방법 |
US8245092B2 (en) * | 2008-11-03 | 2012-08-14 | Apple Inc. | Method for efficient control signaling of two codeword to one codeword transmission |
-
2009
- 2009-03-09 JP JP2009054906A patent/JP5478094B2/ja active Active
-
2010
- 2010-03-03 CN CN2010800112276A patent/CN102349326A/zh active Pending
- 2010-03-03 WO PCT/JP2010/053401 patent/WO2010103965A1/ja active Application Filing
- 2010-03-03 EP EP10750719A patent/EP2408231A1/en not_active Withdrawn
- 2010-03-03 US US13/255,374 patent/US20120026960A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP2408231A1 (en) | 2012-01-18 |
US20120026960A1 (en) | 2012-02-02 |
WO2010103965A1 (ja) | 2010-09-16 |
JP2010212856A (ja) | 2010-09-24 |
CN102349326A (zh) | 2012-02-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20200366448A1 (en) | System and method for link adaptation for low cost user equipments | |
US10873439B2 (en) | Method and apparatus for multiplexing channel state information | |
US10602456B2 (en) | Method and apparatus for pathloss derivation for beam operation in a wireless communication system | |
US20200235870A1 (en) | Uplink control information transmission method and apparatus for use in cellular mobile communication system | |
US9124320B2 (en) | Mobile terminal apparatus, radio base station apparatus and radio communication method | |
JP5210278B2 (ja) | 無線基地局装置、移動端末装置及び無線通信方法 | |
US8964868B2 (en) | Method and apparatus for uplink power control in multiple-input multiple-output | |
US8971203B2 (en) | Combining channel quality measurements based on sounding reference signals and demodulation reference signals | |
US11895718B2 (en) | Method of and apparatus for transmitting data based on channel state in device-to-device communication | |
US11228393B2 (en) | Method and apparatus for channel quality indicator (CQI) and channel state information (CSI) reporting | |
US9332528B2 (en) | Method and device for feeding back precoding matrix indicator using interpolation | |
WO2011129585A2 (ko) | 다중 안테나 지원 무선 통신 시스템에서 효율적인 피드백 방법 및 장치 | |
WO2010073936A1 (ja) | 無線基地局 | |
US10158467B2 (en) | Method and apparatus for transmitting uplink data based on hybrid beamforming in a wireless communication system | |
JPWO2010032810A1 (ja) | 基地局装置、ユーザ装置及びプリコーディング方法 | |
JP5478094B2 (ja) | 無線基地局 | |
WO2016121257A1 (ja) | 無線通信装置および信号処理の制御方法 | |
JP5367187B2 (ja) | 無線通信システム、無線基地局装置、移動端末装置及び無線通信方法 | |
Imran et al. | An energy saving strategy for LTE-A multiantenna systems | |
EP3317983B1 (en) | A network node, a wireless device and respective method performed thereby for communicating therebetween | |
KR20210109421A (ko) | 단말간 통신에서 채널 상태에 기초한 데이터 송신을 위한 방법 및 장치 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20110331 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20130305 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20130502 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20131029 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20131220 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20140121 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20140210 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 5478094 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |