WO2010032774A1 - 送信電力制御方法、移動通信システム及び無線基地局 - Google Patents
送信電力制御方法、移動通信システム及び無線基地局 Download PDFInfo
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- WO2010032774A1 WO2010032774A1 PCT/JP2009/066224 JP2009066224W WO2010032774A1 WO 2010032774 A1 WO2010032774 A1 WO 2010032774A1 JP 2009066224 W JP2009066224 W JP 2009066224W WO 2010032774 A1 WO2010032774 A1 WO 2010032774A1
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- base station
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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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
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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
- H04W52/38—TPC being performed in particular situations
- H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
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- 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
- H04B7/022—Site diversity; Macro-diversity
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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
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
- H04W52/228—TPC being performed according to specific parameters taking into account previous information or commands using past power values or information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the present invention relates to a transmission power control method, a mobile communication system, and a radio base station.
- the present invention has been made in view of the above-described problems, and appropriately increases the transmission power of the uplink signal in the mobile station in the soft handover state in the environment where the autonomous distributed network and the centralized control network are mixed. It is an object to provide a transmission power control method, a mobile communication system, and a radio base station that can be controlled.
- the first feature of the present invention is that uplink signal transmission power in a mobile station that establishes a radio link between a first cell under the first radio base station and a second cell under the second radio base station.
- the second radio base station transfers the second uplink signal received from the mobile station to the first radio base station in the second cell;
- the first radio base station combines the first uplink signal received from the mobile station in the first cell and the second uplink signal transferred from the second radio base station, and Step B of generating and transmitting a transmission power control signal for controlling the transmission power of the uplink signal in the mobile station based on the reception quality of the uplink signal, and the transmission power control received by the mobile station Based on the signal before
- a step C of controlling the transmission power of the uplink signal is that uplink signal transmission power in a mobile station that establishes a radio link between a first cell under the first radio base station and a second cell under the second radio base station.
- the second radio base station transfers the second uplink signal as a layer 1 signal to the first radio base station, and in the step B The first radio base station may combine the first uplink signal and the second uplink signal by maximum ratio combining.
- the second radio base station transfers the second uplink signal as a layer 2 signal or a layer 3 signal to the first radio base station
- the first radio base station may combine the first uplink signal and the second uplink signal by selective combining.
- uplink signal transmission is performed in a mobile station that establishes a radio link between a first cell under the first radio base station and a second cell under the second radio base station.
- a mobile communication system configured to control power, wherein the second radio base station transmits a second uplink signal received from the mobile station in the second cell to the first radio base station.
- the first radio base station transmits the first uplink signal received from the mobile station and the second uplink transferred from the second radio base station in the first cell.
- Is configured to generate and transmit a transmission power control signal for controlling the transmission power of the uplink signal in the mobile station based on the reception quality of the uplink signal after combining the signal
- the mobile station Based on the transmission power control signal received, and summarized in that the is configured to control the transmission power of the uplink signal.
- the second radio base station is configured to transfer the second uplink signal as a layer 1 signal to the first radio base station.
- the radio base station may be configured to combine the first uplink signal and the second uplink signal by maximum ratio combining.
- the second radio base station is configured to transfer the second uplink signal to the first radio base station as a layer 2 signal or a layer 3 signal.
- the first radio base station may be configured to combine the first uplink signal and the second uplink signal by selective combining.
- the third feature of the present invention is that transmission power of an uplink signal in a mobile station that establishes a radio link between a first cell under the first radio base station and a second cell under the second radio base station.
- a radio base station functioning as the first radio base station in a mobile communication system configured to control a first uplink signal received from the mobile station in the first cell; and Based on the combining unit configured to combine the second uplink signal received from the mobile station in the second cell transferred from the radio base station, and the reception quality of the combined uplink signal, And a transmitter configured to generate and transmit a transmission power control signal for controlling transmission power of an uplink signal in the mobile station.
- the combining unit when the combining unit receives the second uplink signal as a layer 1 signal from the second radio base station, the combining unit and the first uplink signal are combined with the first uplink signal by maximum ratio combining. It may be configured to synthesize the second uplink signal.
- the combining unit when the combining unit receives the second uplink signal as a layer 2 signal or a layer 3 signal from the second radio base station, the combining unit performs selective combining to perform the first uplink.
- a signal and the second uplink signal may be combined.
- a first radio base station that manages the first cell
- a second radio base station that manages the second cell
- a third radio base station that manages the third cell
- a mobile communication system comprising a fourth radio base station that manages a cell and a fifth radio base station that manages a fifth cell, wherein the first radio base station and the second radio base station are autonomously distributed Connected to a first network to be controlled, the third radio base station and the fourth radio base station are connected to a second network intensively controlled by the fifth radio base station, When the mobile station has established a radio link between the first radio base station and the second radio base station, the first radio base station receives the first link received from the mobile station in the first cell.
- the second radio base station is configured to generate and transmit a transmission power control signal for controlling the transmission power of the link signal, and the second radio base station receives the second uplink received from the mobile station in the second cell.
- the mobile station is configured to generate and transmit a transmission power control signal for controlling the transmission power of the uplink signal in the mobile station based on the reception quality of the signal, and the mobile station transmits the third radio base When a radio link is established between a station and the fourth radio base station, the third radio base station and the fourth radio base station are connected to the mobile station in the third cell and the fourth cell, respectively.
- the third uplink signal and the fourth uplink signal received from the fifth radio base station are configured to forward the third uplink signal and the fourth uplink signal to the fifth radio base station.
- Combines with 4 uplink signals Generating a transmission power control signal for controlling the transmission power of the uplink signal in the mobile station based on the reception quality of the combined uplink signal, and the third radio base station or the fourth radio base station.
- the gist of the present invention is that it is configured to transmit via the Internet.
- the mobile station when the mobile station has established a radio link between the first radio base station and the third radio base station, the first radio base station Based on one uplink signal, the mobile station is configured to generate and transmit a transmission power control signal for controlling the transmission power of the uplink signal in the mobile station, and the third radio base station 3 uplink signals are configured to be transferred to the fifth radio base station, and the fifth radio base station performs uplink based on the reception quality of the third uplink signal in the mobile station.
- a transmission power control signal for controlling the transmission power of the signal may be generated and transmitted via the third radio base station.
- transmission capable of appropriately controlling uplink signal transmission power in a mobile station in a soft handover state in an environment where autonomous distributed networks and centralized control networks coexist.
- a power control method, a mobile communication system, and a radio base station can be provided.
- 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 eNB according to the first embodiment of the present invention.
- FIG. 3 is a functional block diagram of the mobile station UE according to the first embodiment of the present invention.
- FIG. 4 is a sequence diagram showing operations of the mobile communication system according to the first embodiment of the present invention.
- FIG. 5 is a functional block diagram of the radio base station RRE according to the first modification of the present invention.
- FIG. 6 is a functional block diagram of the radio base station eNB according to the first modification of the present invention.
- FIG. 7 is a sequence diagram showing operations of the mobile communication system according to the first modification of the present invention.
- FIG. 8 is a sequence diagram showing operations of the mobile communication system according to the first modification of the present invention.
- a self-sustained distributed control network and a centralized control network are mixed, and a radio access technology similar to the LTE (Long Term Evolution) system is applied. Yes.
- LTE Long Term Evolution
- Radio base stations eNB # 1 to eNB # 3 are connected to the autonomous distributed control network, and each radio base station eNB # 1 to eNB # 3 exchanges control signals with each other autonomously. It is configured to control wireless communication in subordinate cells.
- the radio base stations eNB # 1 to eNB # 3 may be directly connected via a high-speed wireless transmission line or a wired transmission line, or may be indirectly connected via a core network. .
- a radio base station eNB # 10, RRE (Remote Radio Equipment) # 1 to RRE # 3 are connected to the centralized control network, and the radio base station eNB # 10 is connected to each radio base station RRE # 1 to RRE # 1 to RRE # 1. It is configured to control wireless communication in cells under RRE # 3.
- RRE Remote Radio Equipment
- the radio base stations RRE # 1 to RRE # 3 are directly connected by a high-speed radio transmission line or a wired transmission line.
- the mobile station UE is configured to be able to set up a radio link with one or a plurality of cells in the autonomous distributed control network and the centralized control network.
- each radio base station eNB # 1 to eNB # 3 (hereinafter, radio base station eNB) in the autonomous distributed control type network includes a mobile station signal receiving unit 11, a transfer unit 12, a radio base station A station signal receiving unit 13, a combining unit 14, a reception quality measuring unit 15, a transmission power control unit 16, and a transmission power control signal transmission unit 17 are provided.
- the mobile station signal reception unit 11 receives an uplink signal (for example, a control signal, a data signal, etc.) transmitted from the mobile station UE that has established a radio link with a cell under the radio base station eNB. It is configured.
- an uplink signal for example, a control signal, a data signal, etc.
- the transfer unit 12 uses the uplink signal (second uplink signal) as another radio for managing the serving cell of the mobile station UE. It is configured to forward to the base station.
- the radio base station signal receiving unit 13 receives a signal transferred from another radio base station (for example, an uplink signal from the mobile station UE received in a cell under the other radio base station). It is configured.
- the combining unit 14 receives an uplink signal (first uplink) received from the mobile station UE in the cell under the radio base station eNB. Signal) and the second uplink signal transferred from the other radio base station described above.
- the combining unit 14 when the combining unit 14 receives the second uplink signal as a layer 1 signal from the other radio base station described above, the combining unit 14 performs the first uplink signal by maximum ratio combining (MRC: Maximum Ratio Combining). And the second uplink signal may be combined.
- MRC Maximum Ratio Combining
- the combining unit 14 when the combining unit 14 receives the second uplink signal as a layer 2 signal or a layer 3 signal from the other radio base station described above, the combining unit 14 performs selective combining to the first uplink signal and the second uplink signal. It may be configured to synthesize the link signal.
- the reception quality measurement unit 15 is configured to measure the reception quality of the uplink signal after being synthesized by the synthesis unit 14.
- reception quality for example, RSRQ (Reference Signal Received Quality), RSRP (Reference Signal Received Power), reception SIR (Signal to Interference Ratio), and the like are assumed.
- the transmission power control unit 16 is configured to generate a transmission power control signal for controlling the transmission power of the uplink signal in the mobile station UE based on the reception quality measured by the reception quality measurement unit 15. .
- the transmission power control unit 16 is configured to generate a TPC (Transmission Power Control) command as the transmission power control signal so that the reception quality measured by the reception quality measurement unit 15 approaches the target value. Yes.
- TPC Transmission Power Control
- the transmission power control signal transmission unit 17 is configured to transmit the transmission power control signal generated by the transmission power control unit 16 to the mobile station UE.
- the mobile station UE includes a transmission power control signal reception unit 21, a transmission power determination unit 22, and a transmission unit 23.
- the transmission power control signal receiving unit 21 manages the above-described radio base station eNB, that is, the radio base station eNB that manages the serving cell of the mobile station UE, or each cell in which the mobile station UE sets a radio link. Is configured to receive a transmission power control signal from each radio base station eNB.
- the transmission power determination unit 22 is configured to determine the transmission power of the uplink signal based on the transmission power control signal received by the transmission power control signal reception unit 21.
- the transmission unit 23 is configured to transmit an uplink signal based on the transmission power determined by the transmission power determination unit 22.
- step S1001 the mobile station UE that has set a radio link between the cell # 1 under the radio base station eNB # 1 and the cell # 2 under the radio base station eNB # 2 A data signal is transmitted as an uplink signal.
- cell # 1 is assumed to be a serving cell of the mobile station UE.
- step S1002 the radio base station eNB # 2 transfers the data signal from the mobile station UE received in the cell # 2 to the radio base station eNB # 1.
- the radio base station eNB # 1 receives the data signal (first uplink signal) received from the mobile station UE in the cell # 1 and the data signal (second uplink) transferred from the radio base station eNB # 2. Signal).
- step S1004 the radio base station eNB # 1 generates a transmission power control signal for controlling the transmission power of the uplink signal in the mobile station UE, based on the reception quality of the combined data signal (uplink signal) To do.
- step S1005 the radio base station eNB # 1 transmits the transmission power control signal to the mobile station UE.
- step S1006 the mobile station UE controls the transmission power of the uplink signal based on the received transmission power control signal.
- the radio base station eNB # 1 that manages the serving cell of the mobile station UE controls the transmission power of the uplink signal in the mobile station UE.
- higher-order nodes for example, the radio network controller RNC, the switching center MME, etc.
- the radio base station eNB # 1 realize higher-speed control than when the uplink signal transmission power in the mobile station UE is controlled. be able to.
- Modification 1 the mobile communication system according to the first modification of the present invention will be described with reference to FIG. 5 to FIG. 7 while focusing on differences from the mobile communication system according to the first embodiment.
- the radio base station RRE in the centralized control type network includes a mobile station signal receiving unit 31, a mobile station signal transmitting unit 32, a transmission power control signal receiving unit 33, and a transmission. And a power control signal transmission unit 34.
- the mobile station signal receiving unit 31 receives an uplink signal (for example, a control signal or a data signal) transmitted from the mobile station UE that has established a radio link with a cell under the radio base station RRE. It is configured.
- an uplink signal for example, a control signal or a data signal
- the mobile station signal transmission unit 32 is configured to transmit the uplink signal received by the mobile station signal reception unit 31 to the radio base station eNB that centrally controls the centralized control network.
- the transmission power control signal receiving unit 33 is configured to receive a transmission power control signal for the mobile station UE transmitted from the radio base station eNB that controls the centralized control network centrally.
- the transmission power control signal transmission unit 34 is configured to transmit the transmission power control signal received by the transmission power control signal reception unit 33 to the mobile station UE.
- the radio base station eNB that centrally controls the centralized control network includes a radio base station signal reception unit 41, a synthesis unit 42, a reception quality measurement unit 43, A transmission power control unit 44 and a transmission power control signal transmission unit 45 are provided.
- the radio base station signal receiving unit 41 receives a signal transferred from the radio base station RRE connected to the centralized control network (for example, an uplink signal from the mobile station UE received in a cell under each radio base station RRE) ).
- the combining unit 42 is configured to combine a plurality of signals received by the radio base station signal receiving unit 41.
- the reception quality measurement unit 43 is configured to measure the reception quality of the uplink signal after being synthesized by the synthesis unit 42.
- reception quality for example, RSRQ (Reference Signal Received Quality), RSRP (Reference Signal Received Power), reception SIR (Signal to Interference Ratio), and the like are assumed.
- the transmission power control unit 44 is configured to generate a transmission power control signal for controlling the transmission power of the uplink signal in the mobile station UE based on the reception quality measured by the reception quality measurement unit 43. .
- the transmission power control unit 44 is configured to generate a TPC command as the transmission power control signal so that the reception quality measured by the reception quality measurement unit 43 approaches the target value.
- the transmission power control signal transmission unit 45 is configured to transmit the transmission power control signal generated by the transmission power control unit 44 to the mobile station UE.
- the mobile station UE sets a radio link between the cell # 11 under the radio base station RRE # 1 and the cell # 12 under the radio base station RRE # 2 in the centralized control network. It shall be.
- step S2001 the mobile station UE transmits a data signal as an uplink signal.
- step S2002 the radio base station RRE # 1 transfers the data signal from the mobile station UE received in the cell # 11 to the radio base station eNB # 10.
- step S2003 the radio base station RRE # 2 The data signal from the mobile station UE received in # 12 is transferred to the radio base station eNB # 10.
- step S2004 the radio base station eNB # 10 receives the data signal (uplink signal) transferred from the radio base station RRE # 1 and the data signal (uplink signal) transferred from the radio base station RRE # 2. Synthesize.
- step S2005 the radio base station eNB # 10 generates a transmission power control signal for controlling the transmission power of the uplink signal in the mobile station UE based on the reception quality of the combined data signal (uplink signal). To do.
- step S2006 the radio base station eNB # 10 transmits the transmission power control signal to the radio base station RRE # 1.
- step S2007 the radio base station RRE # 1 transmits the transmission power control signal to the mobile station UE.
- step S2008 the mobile station UE determines the uplink signal based on the received transmission power control signal. To control the transmission power.
- the mobile station UE is located between the cell # 2 under the radio base station eNB # 2 in the autonomous distributed control network and the cell # 11 under the radio base station RRE # 1 in the centralized control network. It is assumed that a wireless link is set in
- step S3001 the mobile station UE transmits a data signal as an uplink signal.
- step S3002 the radio base station RRE # 1 transfers the data signal from the mobile station UE received in the cell # 11 to the radio base station eNB # 10.
- the radio base station eNB # 2 controls the transmission power of the uplink signal in the mobile station UE based on the reception quality of the data signal (uplink signal) from the mobile station UE received in the cell # 2.
- a transmission power control signal is generated for the mobile station UE in step S3004.
- step S3005 the radio base station eNB # 10 controls the transmission power of the uplink signal in the mobile station UE based on the reception quality of the data signal (uplink signal) transferred from the radio base station RRE # 1.
- a transmission power control signal for generating the transmission power is generated, and in step S3006, the transmission power control signal is transmitted to the mobile station UE via the radio base station RRE # 1.
- step S3007 the mobile station UE controls the transmission power of the uplink signal based on the transmission power control signal received from the radio base station eNB # 2 and the transmission power control signal received from the radio base station RRE # 1.
- the mobile station UE requests that both the transmission power control signal received from the radio base station eNB # 2 and the transmission power control signal received from the radio base station RRE # 1 increase the transmission power of the uplink signal.
- the uplink signal transmission power may be increased only when the uplink signal is transmitted, and in other cases, the uplink signal transmission power may be decreased.
- the mobile station UE performs the mobile according to the type of cell in which a radio link is set.
- the method for controlling the transmission power of the uplink signal in the station UE can be flexibly changed.
- the operations of the mobile station UE, the radio base station eNB, and the radio base station RRE described above may be implemented by hardware, may be implemented by a software module executed by a processor, or may be a combination of both. May be implemented.
- 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. Further, such a storage medium and a processor may be provided in the ASIC. Such an ASIC may be provided in the mobile station UE, the radio base station eNB, and the radio base station RRE. Further, the storage medium and the processor may be provided in the mobile station UE, the radio base station eNB, and the radio base station RRE as discrete components.
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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。
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動作について説明する。
本実施形態に係る移動通信システムによれば、自立分散制御型ネットワークにおいて、移動局UEのサービングセルを管理する無線基地局eNB#1が、当該移動局UEにおける上りリンク信号の送信電力を制御することによって、無線基地局eNB#1の上位ノード(例えば、無線制御装置RNCや交換局MME等)が、移動局UEにおける上りリンク信号の送信電力を制御する場合と比べて、高速な制御を実現することができる。
以下、図5乃至図7を参照して、本発明の変更例1に係る移動通信システムについて、上述の第1の実施形態に係る移動通信システムとの相違点に着目して説明する。
Claims (11)
- 第1無線基地局配下の第1セルと第2無線基地局配下の第2セルとの間で無線リンクを設定している移動局における上りリンク信号の送信電力を制御する送信電力制御方法であって、
前記第2無線基地局が、前記第2セルにおいて前記移動局から受信した第2上りリンク信号を前記第1無線基地局に対して転送する工程Aと、
前記第1無線基地局が、前記第1セルにおいて前記移動局から受信した第1上りリンク信号と前記第2無線基地局から転送された前記第2上りリンク信号とを合成し、合成後の上りリンク信号の受信品質に基づいて、該移動局における上りリンク信号の送信電力を制御するための送信電力制御信号を生成して送信する工程Bと、
前記移動局が、受信した前記送信電力制御信号に基づいて、前記上りリンク信号の送信電力を制御する工程Cとを有することを特徴とする送信電力制御方法。 - 前記工程Aにおいて、前記第2無線基地局が、レイヤ1信号として、前記第2上りリンク信号を前記第1無線基地局に対して転送し、
前記工程Bにおいて、前記第1無線基地局が、最大比合成によって前記第1上りリンク信号と前記第2上りリンク信号とを合成することを特徴とする請求項1に記載の送信電力制御方法。 - 前記工程Aにおいて、前記第2無線基地局が、レイヤ2信号又はレイヤ3信号として、前記第2上りリンク信号を前記第1無線基地局に対して転送し、
前記工程Bにおいて、前記第1無線基地局が、選択合成によって前記第1上りリンク信号と前記第2上りリンク信号とを合成することを特徴とする請求項1に記載の送信電力制御方法。 - 第1無線基地局配下の第1セルと第2無線基地局配下の第2セルとの間で無線リンクを設定している移動局における上りリンク信号の送信電力を制御するように構成されている移動通信システムであって、
前記第2無線基地局は、前記第2セルにおいて前記移動局から受信した第2上りリンク信号を前記第1無線基地局に対して転送するように構成されており、
前記第1無線基地局は、前記第1セルにおいて前記移動局から受信した第1上りリンク信号と前記第2無線基地局から転送された前記第2上りリンク信号とを合成し、合成後の上りリンク信号の受信品質に基づいて、該移動局における上りリンク信号の送信電力を制御するための送信電力制御信号を生成して送信するように構成されており、
前記移動局は、受信した前記送信電力制御信号に基づいて、前記上りリンク信号の送信電力を制御するように構成されていることを特徴とする移動通信システム。 - 前記第2無線基地局は、レイヤ1信号として、前記第2上りリンク信号を前記第1無線基地局に対して転送するように構成されており、
前記第1無線基地局は、最大比合成によって前記第1上りリンク信号と前記第2上りリンク信号とを合成するように構成されていることを特徴とする請求項4に記載の移動通信システム。 - 前記第2無線基地局は、レイヤ2信号又はレイヤ3信号として、前記第2上りリンク信号を前記第1無線基地局に対して転送するように構成されており、
前記第1無線基地局は、選択合成によって前記第1上りリンク信号と前記第2上りリンク信号とを合成するように構成されていることを特徴とする請求項4に記載の移動通信システム。 - 第1無線基地局配下の第1セルと第2無線基地局配下の第2セルとの間で無線リンクを設定している移動局における上りリンク信号の送信電力を制御するように構成されている移動通信システムにおいて該第1無線基地局として機能する無線基地局であって、
前記第1セルにおいて前記移動局から受信した第1上りリンク信号と、前記第2無線基地局から転送された前記第2セルにおいて該移動局から受信した第2上りリンク信号とを合成するように構成されている合成部と、
合成後の上りリンク信号の受信品質に基づいて、前記移動局における上りリンク信号の送信電力を制御するための送信電力制御信号を生成して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無線基地局。 - 前記合成部は、前記第2無線基地局からレイヤ1信号として前記第2上りリンク信号を受信した場合には、最大比合成によって前記第1上りリンク信号と該第2上りリンク信号とを合成するように構成されていることを特徴とする請求項7に記載の無線基地局。
- 前記合成部は、前記第2無線基地局からレイヤ2信号又はレイヤ3信号として前記第2上りリンク信号を受信した場合には、選択合成によって前記第1上りリンク信号と該第2上りリンク信号とを合成するように構成されていることを特徴とする請求項7に記載の無線基地局。
- 第1セルを管理する第1無線基地局と、第2セルを管理する第2無線基地局と、第3セルを管理する第3無線基地局と、第4セルを管理する第4無線基地局と、第5セルを管理する第5無線基地局とを具備する移動通信システムであって、
前記第1無線基地局及び前記第2無線基地局は、自立分散制御型ネットワークに接続されており、
前記第3無線基地局及び前記第4無線基地局は、前記第5無線基地局による集中制御型ネットワークに接続されており、
移動局が、前記第1無線基地局と前記第2無線基地局との間で無線リンクを設定している場合、該第1無線基地局は、前記第1セルにおいて該移動局から受信した第1上りリンク信号の受信品質に基づいて、該移動局における上りリンク信号の送信電力を制御するための送信電力制御信号を生成して送信するように構成されており、該第2無線基地局は、前記第2セルにおいて該移動局から受信した第2上りリンク信号の受信品質に基づいて、該移動局における上りリンク信号の送信電力を制御するための送信電力制御信号を生成して送信するように構成されており、
前記移動局が、前記第3無線基地局と前記第4無線基地局との間で無線リンクを設定している場合、該第3無線基地局及び該第4無線基地局は、それぞれ前記第3セル及び前記第4セルにおいて該移動局から受信した第3上りリンク信号及び第4上りリンク信号を前記第5無線基地局に対して転送するように構成されており、該第5無線基地局は、該第3上りリンク信号と該第4上りリンク信号とを合成し、合成後の上りリンク信号の受信品質に基づいて、該移動局における上りリンク信号の送信電力を制御するための送信電力制御信号を生成し、該第3無線基地局又は該第4無線基地局を介して送信するように構成されていることを特徴とする移動通信システム。 - 前記移動局が、前記第1無線基地局と前記第3無線基地局との間で無線リンクを設定している場合、該第1無線基地局は、前記第1上りリンク信号に基づいて、該移動局における上りリンク信号の送信電力を制御するための送信電力制御信号を生成して送信するように構成されており、該第3無線基地局は、前記第3上りリンク信号を前記第5無線基地局に対して転送するように構成されており、該第5無線基地局は、該第3上りリンク信号の受信品質に基づいて、該移動局における上りリンク信号の送信電力を制御するための送信電力制御信号を生成し、該第3無線基地局を介して送信するように構成されていることを特徴とする請求項10に記載の移動通信システム。
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EP09814618.6A EP2334125A4 (en) | 2008-09-22 | 2009-09-17 | METHOD FOR CONTROLLING TRANSMISSION PERFORMANCE, MOBILE COMMUNICATION SYSTEM AND WIRELESS BASE STATION |
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KR100753369B1 (ko) | 2006-08-30 | 2007-08-30 | 주식회사 팬택 | 이동통신 시스템의 셀간 간섭을 저감하는 방법 |
JP5080607B2 (ja) * | 2010-04-05 | 2012-11-21 | 株式会社エヌ・ティ・ティ・ドコモ | 無線基地局装置及び送信電力制御方法 |
US9204399B2 (en) | 2011-10-03 | 2015-12-01 | Qualcomm Incorporated | Method and apparatus for uplink transmission power control and timing in coordinated multipoint transmission schemes |
WO2013069966A1 (ko) * | 2011-11-07 | 2013-05-16 | 주식회사 팬택 | 협력형 다중 포인트 통신시스템에서 단말의 상향링크 전력 제어 방법 및 송수신 포인트의 상향링크 통신방법, 그 송수신 포인트, 그 단말 |
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US20110218015A1 (en) | 2011-09-08 |
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US8428641B2 (en) | 2013-04-23 |
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