WO2010147110A1 - 無線基地局、移動通信システム及び移動通信方法 - Google Patents
無線基地局、移動通信システム及び移動通信方法 Download PDFInfo
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- WO2010147110A1 WO2010147110A1 PCT/JP2010/060103 JP2010060103W WO2010147110A1 WO 2010147110 A1 WO2010147110 A1 WO 2010147110A1 JP 2010060103 W JP2010060103 W JP 2010060103W WO 2010147110 A1 WO2010147110 A1 WO 2010147110A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/16—Deriving transmission power values from another channel
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/32—TPC of broadcast or control channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
Definitions
- the present invention relates to a radio base station, a mobile communication system, and a mobile communication method.
- the W-CDMA mobile communication system is configured such that the transmission power of each channel other than PCPICH (Primary Common Pilot Channel) is set as a relative value to the transmission power of PCPICH.
- PCPICH Primary Common Pilot Channel
- the upper limit value of transmission power (hereinafter referred to as the upper limit value of transmission power) and the lower limit value of transmission power (hereinafter referred to as the lower limit value of transmission power) are set as relative values from the transmission power of the PCPICH.
- the dedicated channel signal is transmitted with the transmission power within the range of the transmission power upper limit value and the transmission power lower limit value.
- the transmission power of PCPICH is “X (dBm)”, and the transmission power upper limit value and the offset value of the transmission power lower limit value of a certain individual channel are respectively “ -a (dB) "and" -b (dB) ", and when the offset value of the transmission power of a certain common channel is" -c (dB) ", the transmission power upper limit value of the dedicated channel is" X-a (dBm) ", the transmission power lower limit value of the dedicated channel is" X-b (dBm) ", and the transmission power of the common channel is" X-c (dBm) ".
- the transmission power upper limit value of the dedicated channel, the transmission power lower limit value of the dedicated channel, and the transmission power of the common channel are also From “Xa (dBm)”, “Xb (dBm)”, and “Xc (dBm)” to “Ya (dBm)”, “Yb (dBm)” And “Yc (dBm)”.
- a channel (“PCPICH” in the case of the W-CDMA system) serving as a reference for setting transmission power is referred to as “reference channel”, and is a relative value with respect to the transmission power of the reference channel.
- a channel for which a transmission power lower limit value is set (“individual channel” and “common channel” in the case of the W-CDMA system) is referred to as “accompanying channel”.
- the transmission power, the transmission power upper limit value, and the transmission power lower limit value of the associated channel set as relative values with respect to the transmission power of the reference channel are expressed as “relative power offset”.
- the transmission power of the reference channel PCPICH
- the transmission power upper limit value of the associated channel PCPICH
- the present invention has been made in view of the above-described problem, and even when the transmission power of the reference channel is changed, the transmission power, the transmission power upper limit value, and the transmission power lower limit value of the associated channel are set. It is an object of the present invention to provide a radio base station, a mobile communication system, and a mobile communication method capable of appropriately transmitting signals by maintaining.
- a first feature of the present invention is a radio base station, and a reference channel power setting unit configured to set transmission power of a reference channel in a predetermined cell, and an associated channel as a relative value with respect to the reference channel
- An associated channel power setting unit configured to set a relative power offset of the reference channel, a transmission power of the reference channel set by the reference channel power setting unit, and the set by the associated channel power setting unit
- a power parameter holding unit configured to hold the relative power offset of the associated channel as a power parameter, and configured to change the relative power offset of the associated channel when the transmission power of the reference channel is changed
- a power parameter correction unit wherein the power parameter correction unit Even if the transmission power of the channel is changed, it is a gist that is configured to maintain without changing the transmission power of the associated channel.
- a radio base station configured to set transmission power of a reference channel in a predetermined cell, and an associated channel as a relative value with respect to the reference channel.
- An associated channel power setting unit configured to set a relative power offset of the reference channel, a transmission power of the reference channel set by the reference channel power setting unit, and the set by the associated channel power setting unit
- a relative power offset of the associated channel is configured to change a relative power offset of the associated channel when the transmission power of the reference channel is changed, and a power parameter holding unit configured to hold a power parameter.
- a power parameter correction unit wherein the power parameter correction unit includes the reference channel. Even if the transmission power of has been changed, it is a gist that is configured to maintain without changing the transmit power on the lower limit value of the associated channel.
- a third feature of the present invention is a mobile communication system, and is characterized by comprising a radio base station according to the first feature or the second feature of the present invention.
- a fourth feature of the present invention is a mobile communication method, in which a radio base station changes a transmission power of a reference channel, and the radio base station is set with a relative value with respect to the transmission power of the reference channel. Setting the transmission power of the associated channel as a relative power offset and the transmission power of the associated channel, the transmission power upper limit value, and the transmission power lower limit value even when the transmission power of the reference channel is changed. And having a process of maintaining without changing.
- 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 upper and lower limit values of transmission power of dedicated channels transmitted by the radio base station according to the first embodiment of the present invention.
- FIG. 4 is a flowchart showing the operation of the mobile communication system according to the first embodiment of the present invention.
- FIG. 5 is a diagram illustrating an example of upper and lower limits of transmission power of a dedicated channel transmitted by a conventional radio base station.
- the mobile communication system according to the present embodiment includes a radio base station 10 and mobile stations UE # 1 and UE # 2.
- the mobile communication system according to the present embodiment may be a W-CDMA mobile communication system, an LTE (Long Term Evolution) mobile communication system, or another communication system. There may be.
- the radio base station 10 includes a reference channel power setting unit 11, an accompanying channel power setting unit 12, a power parameter holding unit 13, a power parameter correction unit 14, and a transmission unit 15. ing.
- the reference channel power setting unit 11 is configured to set the transmission power of the reference channel.
- the accompanying channel power setting unit 12 is configured to set the relative power offset of the accompanying channel according to the relative value with respect to the transmission power of the reference channel set by the reference channel power setting unit 11.
- the power parameter holding unit 13 is configured to hold the power parameters of each channel (the transmission power of the reference channel and the relative power offset of the associated channel) set by the reference channel power setting unit 11 and the associated channel power setting unit 12. Has been.
- the power parameter correction unit 14 is configured to change the relative power offset (accompanying channel transmission power, transmission power upper limit value and transmission power lower limit value) of the associated channel when the transmission power of the reference channel is changed. Yes.
- the transmission unit 15 is configured to transmit each channel signal based on the value of the power parameter holding unit 13.
- the power parameter correction unit 14 maintains the transmission power, the transmission power upper limit value, and the transmission power lower limit value of the associated channel without being changed. It may be configured as follows.
- the power parameter holding unit 13 transmits the transmission power “X (dBm) of the PCPICH.
- the relative power offset of the dedicated channel (the offset of the transmission power upper limit value and the offset of the transmission power lower limit value) “ ⁇ a (dB)” and “ ⁇ b (dB)”
- the value “Xa (dBm)” and the relative power lower limit “Xb (dBm)” of the dedicated channel may be determined.
- the power parameter correction unit 14 may be configured to change the relative power offset of the associated channel and maintain the transmission power of the associated channel.
- the power parameter correction unit 14 transmits the transmission power of the dedicated channel even when the transmission power of the PCPICH is changed to “Y (dBm)”.
- the upper limit value “Xa (dBm)” and the transmission power lower limit value “Xb (dBm)” of the dedicated channel may be maintained.
- the relative power offset of the transmission power upper limit value “Xa (dBm)” with respect to the transmission power “Y (dBm)” of the PCPICH is “X ⁇ Y ⁇ a (dB)”, and this transmission power lower limit.
- the relative power offset of the value “Xb (dBm)” with respect to the transmission power “Y (dBm)” of the PCPICH is “XYb (dB)”.
- the transmission power of the reference channel is changed while the reference channel and the associated channel are already set, the transmission power of the reference channel is changed from “X (dBm)” to “Y (dBm)” in step S101. To do.
- step S102 it is determined whether or not the power parameter correction is necessary for each associated channel. If it is determined that correction is necessary, the process proceeds to step S103. If it is determined that correction is not necessary, the process ends. In this case, since the relative power offset is not changed, the transmission power of the associated channel varies in conjunction with the transmission power of the reference channel.
- step S103 the power parameter is corrected so that the transmission power of the associated channel does not change before and after the change of the transmission power of the reference channel.
- the relative power offset of the associated channel before the change of the transmission power of the reference channel is “ ⁇ a (dB). ”.
- the transmission power of the associated channel before the transmission power of the reference channel is changed is “X-a (dBm)”.
- the transmission power of the reference channel is changed to “Y (dBm)”
- the transmission power of the associated channel becomes “Ya (dBm)”.
- the relative power offset is changed from “ ⁇ a (dB)” to “X ⁇ Y ⁇ a (dB)”.
- the mobile communication system according to the first embodiment of the present invention is configured so that the transmission power of the associated channel is not changed even when the transmission power of the reference channel is changed.
- the transmission power of the reference channel decreases, it is possible to solve the problem that the transmission power of the individual channel for the mobile station in communication decreases and the communication is disconnected.
- a first feature of the present embodiment is a radio base station 10, which is configured to set a transmission power of a reference channel (for example, PCPICH) in a predetermined cell, and a reference channel power setting unit 11.
- the associated channel power setting unit 12 configured to set the relative power offset of the associated channel (for example, dedicated channel) as a relative value to the channel, and the transmission power of the reference channel set by the reference channel power setting unit 11
- the power parameter holding unit 13 configured to hold the relative power offset of the associated channel set by the associated channel power setting unit 12 as a power parameter, and the transmission power of the reference channel is changed.
- Power parameter correction unit 1 configured to change the relative power offset of the channel
- the power parameter correction unit 14 is configured to maintain the transmission power of the associated channel without being changed even when the transmission power of the reference channel is changed. To do.
- a second feature of the present embodiment is a radio base station 10, and a reference channel power setting unit 11 configured to set transmission power of a reference channel in a predetermined cell, and a relative value with respect to the reference channel
- the associated channel power setting unit 12 configured to set the relative power offset of the associated channel, and the transmission power of the reference channel set by the reference channel power setting unit 11 and the associated channel power setting unit 12 are set.
- the relative power offset of the associated channel is configured to change the relative power offset of the associated channel when the transmission power of the reference channel is changed with the power parameter holding unit 13 configured to hold the power parameter.
- the power parameter correction unit 14 is provided with a reference channel. Even if the transmission power of has been changed, and summarized in that is configured to maintain without changing the transmit power on the lower limit of the associated channel.
- the change of the transmission power of the reference channel may be triggered by a request from the host device.
- the power parameter correction unit 14 determines whether or not to correct the power parameter according to the situation when the transmission power of the reference channel is changed or the type of the associated channel. You may be comprised so that it may select about.
- the third feature of the present embodiment is a mobile communication system, and has a gist of having a radio base station according to the first feature or the second feature of the present embodiment.
- the fourth feature of the present embodiment is a mobile communication method, in which the radio base station 10 changes the transmission power of the reference channel, and the radio base station 10 is set with a relative value with respect to the transmission power of the reference channel. Setting the transmission power of the associated channel as a relative power offset, and the radio base station 10 even if the transmission power of the reference channel is changed, the transmission power of the associated channel, the transmission power upper limit value, and And a step of maintaining the transmission power lower limit value without changing it.
- the change of the transmission power of the reference channel may be triggered by a request from the host device.
- radio base station 10 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 10 and the mobile station UE. Further, the storage medium and the processor may be provided in the radio base station 10 and the mobile station UE as discrete components.
- the signal is appropriately transmitted by maintaining the transmission power, the transmission power upper limit value, and the transmission power lower limit value of the associated channel. Therefore, it is useful in wireless communication.
Abstract
Description
図1乃至図4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4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、基準チャネルの送信電力が変更された場合であっても、付随チャネルの送信電力が変更されないように構成されているため、例えば、基準チャネルの送信電力が減少した場合に、通信中の移動局に対する個別チャネルの送信電力が減少し、かかる通信が切断されてしまうという問題点を解決することができる。
11…基準チャネル電力設定部
12…付随チャネル電力設定部
13…電力パラメータ保持部
14…電力パラメータ補正部
15…送信部
Claims (7)
- 所定セルにおいて、基準チャネルの送信電力を設定するように構成されている基準チャネル電力設定部と、
前記基準チャネルに対する相対値として付随チャネルの相対電力オフセットを設定するように構成されている付随チャネル電力設定部と、
前記基準チャネル電力設定部にて設定された前記基準チャネルの送信電力及び前記付随チャネル電力設定部にて設定された前記付随チャネルの相対電力オフセットを、電力パラメータとして保持するように構成されている電力パラメータ保持部と、
前記基準チャネルの送信電力が変更された場合、前記付随チャネルの相対電力オフセットを変更するように構成されている電力パラメータ補正部とを具備し、
前記電力パラメータ補正部は、前記基準チャネルの送信電力が変更になった場合であっても、前記付随チャネルの送信電力を変更することなく維持するように構成されていることを特徴とする無線基地局。 - 所定セルにおいて、基準チャネルの送信電力を設定するように構成されている基準チャネル電力設定部と、
前記基準チャネルに対する相対値として付随チャネルの相対電力オフセットを設定するように構成されている付随チャネル電力設定部と、
前記基準チャネル電力設定部にて設定された前記基準チャネルの送信電力及び前記付随チャネル電力設定部にて設定された前記付随チャネルの相対電力オフセットを、電力パラメータを保持するように構成されている電力パラメータ保持部と、
前記基準チャネルの送信電力が変更された場合、前記付随チャネルの相対電力オフセットを変更するように構成されている電力パラメータ補正部とを具備し、
前記電力パラメータ補正部は、前記基準チャネルの送信電力が変更になった場合であっても、前記付随チャネルの送信電力上下限値を変更することなく維持するように構成されていることを特徴とする無線基地局。 - 前記基準チャネルの送信電力の変更が上位装置からの要求をトリガとすることを特徴とする請求項1又は2に記載の無線基地局。
- 前記電力パラメータ補正部は、前記基準チャネルの送信電力の変更時の状況又は前記付随チャネルの種別に応じて、前記電力パラメータの補正を実施するか否かについ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乃至3のいずれか一項に記載の無線基地局。
- 請求項1乃至4のいずれか一項に記載の無線基地局を有することを特徴とする移動通信システム。
- 無線基地局が、基準チャネルの送信電力を変更する工程と、
前記無線基地局が、前記基準チャネルの送信電力に対する相対値で設定される相対電力オフセットとして付随チャネルの送信電力を設定する工程と、
前記無線基地局が、前記基準チャネルの送信電力が変更になった場合であっても、前記付随チャネルの送信電力、送信電力上限値及び送信電力下限値を変更することなく維持する工程とを有することを特徴とする移動通信方法。 - 前記基準チャネルの送信電力の変更は、上位装置からの要求をトリガとすることを特徴とする請求項6に記載の移動通信方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US13/378,508 US8755327B2 (en) | 2009-06-15 | 2010-06-15 | Radio base station, mobile communication system and mobile communication method for controlling a transmission power of a reference channel and an associated channel |
EP10789485.9A EP2445275A4 (en) | 2009-06-15 | 2010-06-15 | WIRELESS BASE STATION, MOBILE COMMUNICATION SYSTEM AND MOBILE COMMUNICATION PROCESS |
JP2011519791A JP5165111B2 (ja) | 2009-06-15 | 2010-06-15 | 無線基地局、移動通信システム及び移動通信方法 |
CN2010800266679A CN102804870A (zh) | 2009-06-15 | 2010-06-15 | 无线基站、移动通信系统以及移动通信方法 |
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JP2002503427A (ja) * | 1997-06-16 | 2002-01-29 | テレフォンアクチボラゲット エルエム エリクソン | 無線通信システムにおける多重符号チャネルのパワーコントロール |
JP2007329758A (ja) | 2006-06-08 | 2007-12-20 | Hitachi Kokusai Electric Inc | 無線基地局装置 |
JP2009142412A (ja) | 2007-12-13 | 2009-07-02 | Kazuya:Kk | 指輪再生方法と指輪の再生構造 |
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KR100339034B1 (ko) * | 1998-08-25 | 2002-10-11 | 삼성전자 주식회사 | 부호분할다중접속통신시스템의제어유지상태에서역방향폐루프전력제어장치및방법 |
EP1079542B1 (de) * | 1999-03-29 | 2005-10-05 | Alcatel | Sendeleistungsregelung in einem Mobilkommunikationssytem |
US6594499B1 (en) * | 2000-09-25 | 2003-07-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Downlink power control in a cellular telecommunications network |
US7181235B2 (en) * | 2003-03-10 | 2007-02-20 | Lucent Technologies Inc. | Hybrid method for adjusting downlink transmitted power |
EP1526652A1 (en) * | 2003-10-24 | 2005-04-27 | Evolium S.A.S. | A method for setting a power offset for power control of a downlink shared channel in a mobile radiocommunication system |
WO2005062489A1 (en) * | 2003-12-22 | 2005-07-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Power control for high-speed packet data transmission |
US8150412B2 (en) * | 2006-03-06 | 2012-04-03 | Alcatel Lucent | Interference mitigation in a wireless communication system |
CN101405963A (zh) * | 2006-03-17 | 2009-04-08 | 日本电气株式会社 | 发送功率控制方法、基站、基站控制站及其控制程序 |
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- 2010-06-15 CN CN2010800266679A patent/CN102804870A/zh active Pending
- 2010-06-15 WO PCT/JP2010/060103 patent/WO2010147110A1/ja active Application Filing
- 2010-06-15 EP EP10789485.9A patent/EP2445275A4/en not_active Withdrawn
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JP2002503427A (ja) * | 1997-06-16 | 2002-01-29 | テレフォンアクチボラゲット エルエム エリクソン | 無線通信システムにおける多重符号チャネルのパワーコントロール |
JP2007329758A (ja) | 2006-06-08 | 2007-12-20 | Hitachi Kokusai Electric Inc | 無線基地局装置 |
JP2009142412A (ja) | 2007-12-13 | 2009-07-02 | Kazuya:Kk | 指輪再生方法と指輪の再生構造 |
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US8755327B2 (en) | 2014-06-17 |
US20120155409A1 (en) | 2012-06-21 |
EP2445275A1 (en) | 2012-04-25 |
EP2445275A4 (en) | 2016-07-06 |
CN102804870A (zh) | 2012-11-28 |
JP5165111B2 (ja) | 2013-03-21 |
JPWO2010147110A1 (ja) | 2012-12-06 |
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