WO2012133697A1 - 受信装置および受信方法、ならびにコンピュータプログラム - Google Patents
受信装置および受信方法、ならびにコンピュータプログラム Download PDFInfo
- Publication number
- WO2012133697A1 WO2012133697A1 PCT/JP2012/058457 JP2012058457W WO2012133697A1 WO 2012133697 A1 WO2012133697 A1 WO 2012133697A1 JP 2012058457 W JP2012058457 W JP 2012058457W WO 2012133697 A1 WO2012133697 A1 WO 2012133697A1
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- WIPO (PCT)
- Prior art keywords
- power
- antennas
- ratio
- reference signal
- signal transmitted
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
- H04B17/327—Received signal code power [RSCP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
Definitions
- the present invention relates to a receiving device, a receiving method, and a computer program.
- received quality information such as signal received power reported from receivers Whether to perform handover between base stations is determined based on the above.
- LTE Long Term Evolution
- 3GPP 3rd Generation Partnership Project
- the terminal device that is a receiver estimates the power (RSRP) using a reference signal (Reference Signal) transmitted from the base station.
- RSRP reference signal
- Reference Signal a reference signal transmitted from the base station.
- the broadcast information of the base station is acquired or the number of antennas is set from another base station. If not notified, the number of antennas of the base station is unknown.
- a reception information level for each unique symbol for each transmission antenna of transmission from the radio transmission apparatus is measured, and the number of transmission antennas is estimated from the reception information level.
- the number of transmission antennas is preferentially demodulated, and CRC inspection is performed using a CRC (Cyclic Redundancy Check) mask pattern to detect the number of transmission antennas (see, for example, Patent Document 1). .
- the terminal device when the reference signal R0 is not transmitted in a base station having two or four transmitting antennas due to an antenna failure or the like, the terminal device Will not be found.
- the present invention provides a receiving apparatus, a receiving method, and a computer program that can solve the above-described problems, that is, can more reliably know the number and power of transmitting antennas and more reliably find a base station. For the purpose.
- the first power of the first signal transmitted from the first transmitting antenna and the second power transmitted from the second transmitting antenna is provided.
- Measuring means for measuring the second power of the signal determination means for determining whether the ratio of the first power to the second power is greater than a predetermined threshold, the first power and the first power
- a receiving apparatus includes estimation means for estimating that the number of transmission antennas is two.
- the first power of the first signal transmitted from the first transmitting antenna and the second power of the second signal transmitted from the second transmitting antenna A measurement step for measuring the power, a determination step for determining whether a ratio between the first power and the second power is greater than a predetermined threshold, and a ratio between the first power and the second power is a threshold
- An estimation step of estimating that the number of transmission antennas is two when it is determined that the number of transmission antennas is greater than two, a reception method is provided.
- the first power of the first signal transmitted from the first transmitting antenna and the second power of the second signal transmitted from the second transmitting antenna are transmitted to the computer.
- a measurement step of measuring the power of the first power, a determination step of determining whether a ratio of the first power and the second power is greater than a predetermined threshold, and the first power and the second power When it is determined that the ratio is larger than the threshold value, a computer program is provided that performs processing including an estimation step of estimating that the number of transmission antennas is two.
- the present invention it is possible to provide a receiving apparatus, a receiving method, and a program capable of knowing the number and power of transmitting antennas more reliably and finding a base station more reliably.
- FIG. 3 It is a block diagram which shows the structure of the receiver of LTE.
- 3 is a block diagram showing a configuration of a power measuring unit 14.
- FIG. It is a flowchart explaining the process of electric power measurement.
- It is a block diagram which shows the structural example of the hardware of a computer.
- FIG. 1 is a block diagram showing a configuration of an LTE receiver.
- the receiver 10 is an example of a receiving device, and includes an RF (Radio Frequency) unit 11, an FFT (Fast Fourier Transform) unit 12, a channel estimation unit 13, and a power measurement unit 14.
- RF Radio Frequency
- FFT Fast Fourier Transform
- a signal received by a receiving antenna is converted from an analog signal to a digital signal by A / D (Analog / Digital) conversion in the RF unit 11.
- the FFT unit 12 divides the digital signal into frequency component data by Fourier transform.
- the channel estimation unit 13 estimates a channel estimation matrix representing a channel state from frequency component data using a known signal (Reference Signal) mapped in advance on a frequency resource.
- the power measurement unit 14 measures power from the channel estimation matrix.
- FIG. 2 is a block diagram showing the configuration of the power measurement unit 14.
- the power measurement unit 14 includes a determination unit 31, a measurement unit 32, an antenna estimation unit 33, and a power calculation unit 34.
- the determination unit 31 determines whether or not the ratio of the power of the reference signal R0 and the power of the reference signal R1 is greater than a predetermined threshold value.
- the measurement unit 32 measures the power of the reference signal R0 and the power of the reference signal R1. When it is determined that the ratio of the power of the reference signal R0 and the power of the reference signal R1 is greater than the threshold, the antenna estimation unit 33 estimates that the number of transmission antennas is two.
- the power calculation unit 34 uses the average value of the power of the reference signal R0 and the power of the reference signal R1 as received power, and the number of transmission antennas is two. Is not estimated, the received power is calculated so that the power of the reference signal R0 is the received power.
- FIG. 3 is a flowchart for explaining the power measurement process.
- step S11 the determination unit 31 determines whether the number of antennas of the base station is one or the number of antennas of the base station is other than one from the channel estimation matrix of the reference signal. If it is determined in step S11 that the number of antennas of the base station is other than 1, that is, if the number of antennas of the base station is 2, 4, or unknown, Proceeding to S12, the measurement unit 32 measures the power P0 of the reference signal R0 from the channel estimation matrix of the reference signal R0, and measures the power P1 of the reference signal R1 from the channel estimation matrix of the reference signal R1.
- step S13 the determination unit 31 determines whether the number of antennas of the base station is two or four from the channel estimation matrix of the reference signal. If it is determined in step S13 that the number of antennas of the base station is not two or four and the number of antennas of the base station is unknown, the procedure proceeds to step S14.
- step S14 the determination unit 31 determines whether or not power P1 / power P0> threshold Tr.
- the threshold value Tr is a predetermined threshold value. That is, the determination unit 31 determines whether or not the ratio between the power P1 and the power P0 is greater than a predetermined threshold value Tr.
- step S14 When it is determined in step S14 that power P1 / power P0> threshold Tr, the antenna estimation unit 33 determines that the number of antennas is two or more (the antenna estimation unit 33 has two transmission antennas). The procedure proceeds to step S15.
- the antenna estimation unit 33 estimates that the number of transmission antennas is two.
- step S11 If it is determined in step S11 that the number of antennas of the base station is one, the procedure proceeds to step S16.
- step S16 the measurement unit 32 measures the power P0 of the reference signal R0 from the channel estimation matrix of the reference signal R0 obtained by the channel estimation unit 13.
- the average power of the base station can be measured appropriately, You can find a station. Also, by receiving broadcast information using the measurement result, the number of broadcast information demodulation / decoding candidates can be reduced, and the amount of processing and power can be reduced.
- the power of the reference signal R0 and the reference signal R1 is measured, and the power of the reference signal R1 is sufficiently higher than the power of the reference signal R0.
- the number of antennas of the base station is determined (estimated) to be 2 or more, otherwise the number of antennas of the base station is determined to be 1 (estimated).
- the power of the base station of the transmitting antenna can be estimated (calculated).
- the series of processes described above can be executed by hardware or software.
- the computer program that constitutes the software can perform various functions by installing a computer embedded in dedicated hardware or various computer programs. For example, it is installed from a program recording medium in a general-purpose personal computer or the like that can be executed.
- FIG. 4 is a block diagram showing an example of the hardware configuration of a computer that executes the above-described series of processing using a computer program.
- a CPU Central Processing Unit
- ROM Read Only Memory
- RAM Random Access Memory
- An input / output interface 105 is further connected to the bus 104.
- the input / output interface 105 includes an input unit 106 including a keyboard, a mouse, and a microphone, an output unit 107 including a display and a speaker, a storage unit 108 including a hard disk and a non-volatile memory, and a communication unit 109 including a network interface.
- a drive 110 for driving a removable medium 111 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory is connected.
- the CPU 101 loads the computer program stored in the storage unit 108 to the RAM 103 via the input / output interface 105 and the bus 104 and executes the computer program. A series of processing is performed.
- the computer program executed by the computer (CPU 101) is, for example, a magnetic disk (including a flexible disk), an optical disk (CD-ROM (Compact Disc-Read Only Memory), DVD (Digital Versatile Disc), etc.), a magneto-optical disk, or It is recorded on a removable medium 111 that is a package medium made of a semiconductor memory or the like, or provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.
- the computer program can be installed in the computer by loading the removable medium 111 in the drive 110 and storing it in the storage unit 108 via the input / output interface 105. Further, the computer program can be installed in the computer by being received by the communication unit 109 via a wired or wireless transmission medium and stored in the storage unit 108. In addition, the computer program can be installed in the computer in advance by storing it in the ROM 102 or the storage unit 108 in advance.
- the computer program executed by the computer may be a program that is processed in time series in the order described in this specification, or in parallel or at a necessary timing such as when a call is made. It may be a program in which processing is performed.
Abstract
Description
Claims (5)
- 第1の送信アンテナから送信されてくる第1の信号の第1の電力と第2の送信アンテナから送信されてくる第2の信号の第2の電力とを測定する測定手段と、
上記第1の電力と上記第2の電力との比が予め定めた閾値より大きいか否かを判定する判定手段と、
上記第1の電力と上記第2の電力との比が上記閾値より大きいと判定された場合、送信アンテナの数が2本であると推定する推定手段と
を有することを特徴とする受信装置。 - 請求項1に記載の受信装置において、
前記測定手段は、前記第1の電力としてのリファレンスシグナルR0の電力と、前記第2の電力としてのリファレンスシグナルR1の電力とを測定する
ことを特徴とする受信装置。 - 請求項1または3のいずれかに記載の受信装置において、
送信アンテナの数が2本であると推定された場合、前記第1の電力と前記第2の電力との平均値を受電電力とし、送信アンテナの数が2本であると推定されなかった場合、前記第1の電力を受電電力とするように、受電電力を計算する計算手段をさらに有する
ことを特徴とする受信装置。 - 第1の送信アンテナから送信されてくる第1の信号の第1の電力と第2の送信アンテナから送信されてくる第2の信号の第2の電力とを測定する測定ステップと、
上記第1の電力と上記第2の電力との比が予め定めた閾値より大きいか否かを判定する判定ステップと、
上記第1の電力と上記第2の電力との比が上記閾値より大きいと判定された場合、送信アンテナの数が2本であると推定する推定ステップと
を含むことを特徴とする受信方法。 - 第1の送信アンテナから送信されてくる第1の信号の第1の電力と第2の送信アンテナから送信されてくる第2の信号の第2の電力とを測定する測定ステップと、
上記第1の電力と上記第2の電力との比が予め定めた閾値より大きいか否かを判定する判定ステップと、
上記第1の電力と上記第2の電力との比が上記閾値より大きいと判定された場合、送信アンテナの数が2本であると推定する推定ステップと
を含む処理をコンピュータに行わせるコンピュータプログラム。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2013507748A JPWO2012133697A1 (ja) | 2011-03-30 | 2012-03-29 | 受信装置および受信方法、ならびにコンピュータプログラム |
EP12763321.2A EP2693656A4 (en) | 2011-03-30 | 2012-03-29 | RECEIVING DEVICE, ITS METHOD, AND COMPUTER PROGRAM |
CN2012800165709A CN103444097A (zh) | 2011-03-30 | 2012-03-29 | 接收装置及接收方法、以及计算机程序 |
US14/007,788 US20140018009A1 (en) | 2011-03-30 | 2012-03-29 | Receiving device, receiving method, and computer program |
Applications Claiming Priority (2)
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JP2011-074508 | 2011-03-30 | ||
JP2011074508 | 2011-03-30 |
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WO2012133697A1 true WO2012133697A1 (ja) | 2012-10-04 |
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PCT/JP2012/058457 WO2012133697A1 (ja) | 2011-03-30 | 2012-03-29 | 受信装置および受信方法、ならびにコンピュータプログラム |
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US (1) | US20140018009A1 (ja) |
EP (1) | EP2693656A4 (ja) |
JP (1) | JPWO2012133697A1 (ja) |
CN (1) | CN103444097A (ja) |
TW (1) | TW201251372A (ja) |
WO (1) | WO2012133697A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006075732A1 (ja) * | 2005-01-17 | 2006-07-20 | Sharp Kabushiki Kaisha | 無線通信装置 |
JP2007174320A (ja) * | 2005-12-22 | 2007-07-05 | Nec Corp | Mimo受信装置 |
JP2010166348A (ja) * | 2009-01-16 | 2010-07-29 | Nec Corp | 無線受信装置、無線通信システム、無線送信装置、送信アンテナ数検出方法およびプログラム |
Family Cites Families (3)
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JP4091578B2 (ja) * | 2004-08-11 | 2008-05-28 | 株式会社東芝 | 無線通信装置及びアンテナ数の推定方法 |
US8532211B2 (en) * | 2009-02-20 | 2013-09-10 | Qualcomm Incorporated | Methods and apparatus for power control based antenna switching |
KR101498065B1 (ko) * | 2009-04-03 | 2015-03-03 | 엘지전자 주식회사 | CoMP동작을 수행하는 이웃 셀이 이용하는 안테나 개수 추정 방법 |
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- 2012-03-29 JP JP2013507748A patent/JPWO2012133697A1/ja active Pending
- 2012-03-29 US US14/007,788 patent/US20140018009A1/en not_active Abandoned
- 2012-03-29 WO PCT/JP2012/058457 patent/WO2012133697A1/ja active Application Filing
- 2012-03-29 EP EP12763321.2A patent/EP2693656A4/en not_active Withdrawn
- 2012-03-29 CN CN2012800165709A patent/CN103444097A/zh active Pending
- 2012-03-29 TW TW101110990A patent/TW201251372A/zh unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006075732A1 (ja) * | 2005-01-17 | 2006-07-20 | Sharp Kabushiki Kaisha | 無線通信装置 |
JP2007174320A (ja) * | 2005-12-22 | 2007-07-05 | Nec Corp | Mimo受信装置 |
JP2010166348A (ja) * | 2009-01-16 | 2010-07-29 | Nec Corp | 無線受信装置、無線通信システム、無線送信装置、送信アンテナ数検出方法およびプログラム |
Non-Patent Citations (2)
Title |
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3RD GENERATION PARTNERSHIP PROJECT;TECHNICAL SPECIFICATION GROUP RADIO ACCESS NETWORK; EVOLVED UNIVERSAL TERRESTRIAL RADIO ACCESS (E-UTRA);PHYSICAL LAYER - MEASUREMENTS(RELEASE 8), September 2008 (2008-09-01), pages 7, XP055131031 * |
See also references of EP2693656A4 * |
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US20140018009A1 (en) | 2014-01-16 |
CN103444097A (zh) | 2013-12-11 |
JPWO2012133697A1 (ja) | 2014-07-28 |
TW201251372A (en) | 2012-12-16 |
EP2693656A1 (en) | 2014-02-05 |
EP2693656A4 (en) | 2014-10-22 |
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