WO2011020217A1 - Procédé d'attribution de puissance de transmission sur la liaison descendante et appareil correspondant - Google Patents

Procédé d'attribution de puissance de transmission sur la liaison descendante et appareil correspondant Download PDF

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Publication number
WO2011020217A1
WO2011020217A1 PCT/CN2009/000948 CN2009000948W WO2011020217A1 WO 2011020217 A1 WO2011020217 A1 WO 2011020217A1 CN 2009000948 W CN2009000948 W CN 2009000948W WO 2011020217 A1 WO2011020217 A1 WO 2011020217A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
transmission power
relay node
resource unit
user equipment
Prior art date
Application number
PCT/CN2009/000948
Other languages
English (en)
Chinese (zh)
Inventor
王栋耀
沈钢
王伟
刘建国
陈继明
Original Assignee
上海贝尔股份有限公司
阿尔卡特朗讯
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 上海贝尔股份有限公司, 阿尔卡特朗讯 filed Critical 上海贝尔股份有限公司
Priority to CN200980159102.5A priority Critical patent/CN102415167B/zh
Priority to PCT/CN2009/000948 priority patent/WO2011020217A1/fr
Publication of WO2011020217A1 publication Critical patent/WO2011020217A1/fr

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Classifications

    • 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
    • H04W52/143—Downlink power control
    • 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
    • H04W52/46—TPC being performed in particular situations in multi hop networks, e.g. wireless relay networks

Definitions

  • the invention relates to the field of communications. More particularly, the present invention relates to a method for allocating downlink transmission power in a wireless communication network having a relay node and a corresponding base station. Background technique
  • the relay technology has been accepted and adopted by the 3GPP (the 3rd Generation Partnership Project) long-term evolution project LTE-Advanced for forwarding service/signaling data between the base station eNodeB and the user equipment UE for better coverage or Better throughput.
  • the coverage of the cell can be extended by using the relay node RN.
  • it is still a problem to obtain benefits from the relay due to loss of spectral efficiency on the backhaul link.
  • an important feature of cellular networks introducing interference is interference suppression. On some spectrum resources, the system will arrange for the relay node RN to send wireless signals and turn off the base station eNodeB.
  • the present invention proposes a scheme for allocating downlink transmission power in a wireless communication network having a relay node.
  • a method for allocating downlink transmission power in a wireless communication network having a relay node comprising the steps of:
  • a base station comprising: A power allocation unit for allocating different transmission powers for different resource units for a subframe for transmitting signals from a base station to a relay node RN or user equipment UE to which it belongs.
  • a subframe from the base station for transmitting a signal from the base station to the relay node RN or user equipment UE to which it belongs is correctly received and demodulated based on the received transmission power information of the corresponding resource unit.
  • a relay node RN or user equipment is proposed
  • UE including:
  • a receiving and demodulating unit configured to correctly receive and demodulate a subframe from the base station for transmitting a signal from the base station to the relay node RN or the user equipment UE to which it belongs based on the received corresponding power information of the corresponding resource unit .
  • system interference levels can be reduced and system performance can be improved.
  • FIG. 1 schematically shows an example of an environment in which the present invention can be implemented
  • Fig. 2 shows an example of one subframe
  • FIG. 3 shows a schematic diagram of association of UEs based on received power
  • Fig. 4 schematically shows a block diagram of a base station eNodeB according to an embodiment of the present invention.
  • Fig. 1 schematically shows an example of a situation in which the present invention can be implemented.
  • the environment 100 includes a base station eNodeB 101 and a relay node RN 102 belonging to the base station eNodeB 101, a user equipment UE 103, and a user equipment UE 104 belonging to the relay node RN 102.
  • the base station eNodeB 101 transmits CRS (Cell Specific Reference Signal), control signals and data signals to the relay node RN 102, the user equipment UE 103, and the relay node RN 102 transmits CRS to the user equipment UE 104 (for type ⁇ Relay, can not transmit CRS), control signals and data signals.
  • CRS Cell Specific Reference Signal
  • the relay node RN 102 transmits CRS to the user equipment UE 104 (for type ⁇ Relay, can not transmit CRS), control signals and data signals.
  • the concern is how the base station eNodeB 101 transmits CRS, control signals and data signals to the relay node RN 102, the user equipment UE 103.
  • the CRS is used for channel estimation
  • the control signal is used for corresponding control of the relay node RN or the user equipment UE.
  • Fig. 1 only one base station eNodeB101 and the relay node RN 102 belonging to the base station eNodeB 101, the user equipment UE 103, and the user equipment UE 104 belonging to the relay node RN 102 are shown in Fig. 1.
  • the base station eNodeB101 may have more relay nodes RN and user equipment UEs, and the relay node RN 102 may also have more user equipment UEs, or the base station eNodeB101 only has the user equipment UE103. Or only the relay node RN 102.
  • the base station eNodeB 101 While the system is running, the base station eNodeB 101 will schedule and allocate resources to all relay nodes and user equipment (including RN 102, UE 103 and UE 104) within the cell according to the scheduling policy used (e.g., rate fair or polling schedule). Thus, some subframes will be allocated for transmitting signals from the base station eNodeB101 to the relay node RN 102 or user equipment UE 103 to which it belongs, while other subframes will be used for transmission from the relay node RN 102 to the user equipment UE 104 to which it belongs. signal.
  • the scheduling policy used e.g., rate fair or polling schedule
  • the relay node to which the base station eNodeB101 belongs The RN 102 or the user equipment UE 103 transmits subframes of signals, and different transmission powers are allocated for different resource units.
  • Fig. 2 shows an example of a subframe for transmitting a signal from the base station eNodeB101 to the relay node RN102 or user equipment UE103 to which it belongs.
  • the subframe 20Q includes three resource units:
  • a resource unit 202 for transmitting a control signal (which constitutes a physical downlink control channel PDCCH); here only the PDCCH is taken as an example, and in fact, the transmission control signal may also include a physical broadcast/multicast channel (PBCH, PMCH). , Physical Control Format Indicator Channel (PCFICH) and Physical HARQ Indicator Channel (PHICH).
  • PBCH physical broadcast/multicast channel
  • PCFICH Physical Control Format Indicator Channel
  • PHICH Physical HARQ Indicator Channel
  • a resource unit 203 for transmitting a data signal (which constitutes a physical downlink shared channel PDSCH);
  • a first transmission power is allocated for a resource unit pre-defined to transmit a cell-specific reference signal and a resource unit for transmitting a control signal, and for a resource unit for transmitting a data signal, A second transmission power is allocated, wherein the first transmission power is greater than the second transmission power.
  • the base station eNodeB determines the energy EPRE (transmission power) of each resource element in the downlink transmission.
  • the transmission EPRE of the downlink cell-specific reference signal is constant in all subframes and the entire system bandwidth, and the value is determined according to the downlink reference signal transmission power provided by the upper layer.
  • the transmission ERPE for the downlink cell-specific reference signal determined by the base station eNodeB 101 is defined as high TXERPE P H (first transmission power).
  • the transmission ERPE used to transmit the control signal is also high TXERPE P H .
  • the base station eNodeB 101 introduces another transmission ERPE P L (P L ⁇ P H ), ie low TXERPR (second transmission power), for transmitting data signals.
  • the first transmission power is allocated for the resource unit pre-defined to transmit the cell-specific reference signal and the resource unit for transmitting the control signal
  • the second transmission is allocated for the resource unit for transmitting the data signal
  • the power, where the first transmission power is greater than the second transmission power not only maintains the coverage performance and ensures the correctness of the channel estimation, but also reduces interference to neighboring cells.
  • the corresponding transmission power information of the corresponding resource unit will be transmitted on the PBCH (Physical Broadcast Channel) or transmitted on the PDCCH.
  • the user equipment UE 103 or the relay node RN 102 is notified.
  • ⁇ is known in advance to UE 103 or RN 102 and is always constant, and can always change, p can be broadcast only on the PBCH or on the PDCCH.
  • the transmission may not be required transmission power information corresponding to respective resource units.
  • the transmission ERPE is for all resource elements.
  • the UE when the UE performs a network entry procedure, it is determined whether the UE is associated with the base station eNodeB or the relay node RN based on a third transmission power. This will result in more UEs being served by the RN.
  • Fig. 3 shows a schematic diagram of the association of UEs based on received power.
  • different cells periodically broadcast their different synchronization signals (usually transmitted by the base station eNodeB).
  • the user equipment UE 303 will select the cell with the received power of the largest synchronization signal as its serving cell. Based on this information, the user equipment UE 303 will transmit a random access preamble on the physical random access channel PRACH.
  • the base station eNodeB 301 and relay node RN 302 in the serving cell will receive the preamble.
  • the base station eNodeB 301 will decide whether the user equipment UE 303 should be associated with the base station eNodeB 301 or the relay node RN 302 according to: If ( - ⁇ 2 ) ⁇ ( - S), the user equipment UE 303 should be associated with the base station eNodeB 301 ;
  • the user equipment UE 303 should be associated to the relay node RN 302.
  • the third transmission power is equal to P H - P L .
  • the user equipment UE 303 should be associated with the base station eNodeB
  • the user equipment UE 303 should be associated to the relay node RN 302.
  • the third transmission power may also be other values, such as P H or P L , and not necessarily P H -P L .
  • the base station eNodeB can be correctly received and demodulated for use from the base station eNodeB to the relay node RN to which it belongs or The user equipment UE transmits a subframe of the signal.
  • the solution of the present invention provides better system performance due to reduced interference.
  • the reduced interference comes from two aspects:
  • the data signal is transmitted with a low TX ERPE, interference to neighboring cells will be reduced.
  • the base station eNodeB will have more opportunities to mute, thereby further reducing interference to neighboring cells.
  • Fig. 4 schematically shows a block diagram of a base station eNodeB according to an embodiment of the present invention.
  • the base station eNodeB 400 includes a power allocation unit 410 for allocating different transmissions to different resource units for a subframe for the base station eNodeB 400 to transmit signals to the relay node RN or user equipment UE to which it belongs. power.
  • One of the subframes has 3 different resource units: Predefined as a resource unit used to transmit a cell-specific reference signal;
  • a first transmission power is allocated, and for a resource unit used to transmit the data signal, a second transmission power is allocated, where The first transmission power is greater than the second transmission power.
  • the base station eNodeB 400 further includes a notifying unit 420 for notifying the relay node RN or the user equipment UE of the respective transmission power of the corresponding resource unit.
  • the base station eNodeB 400 further includes a decision unit 430 for determining whether the user equipment UE should be associated with the base station eNodeB or should be associated with the relay node RN based on the third transmission power.
  • the relay node RN or the user equipment UE comprises a receiving and demodulating unit for correctly receiving and demodulating from the base station eNodeB for transmitting from the base station eNodeB based on the corresponding transmission power information of the received corresponding resource unit
  • the relay node RN to which it belongs or the subframe in which the user equipment UE transmits a signal comprises a receiving and demodulating unit for correctly receiving and demodulating from the base station eNodeB for transmitting from the base station eNodeB based on the corresponding transmission power information of the received corresponding resource unit.
  • Table 1 shows the parameters used in the simulation and their values.
  • Table 2 gives the advantages achieved over the prior art.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à un schéma d'attribution de puissance de transmission sur la liaison descendante dans un réseau de communication sans fil avec un nœud relais (RN). Un procédé d'attribution de puissance de transmission sur la liaison descendante dans un réseau de communication sans fil avec un nœud relais (RN) comprend l’étape suivante : en ce qui concerne les sous-trames utilisées pour transmettre un signal d'une station de base à des nœuds relais (RN) ou à des équipements d'utilisateurs (EU) qui appartiennent à la station de base, le procédé consiste à attribuer une puissance de transmission différente à une unité de ressources respective. Grâce à la solution technique de la présente invention, il est possible de réduire le niveau de brouillage du système et d'améliorer par là même les performances du système.
PCT/CN2009/000948 2009-08-18 2009-08-18 Procédé d'attribution de puissance de transmission sur la liaison descendante et appareil correspondant WO2011020217A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200980159102.5A CN102415167B (zh) 2009-08-18 2009-08-18 分配下行传输功率的方法及相应的装置
PCT/CN2009/000948 WO2011020217A1 (fr) 2009-08-18 2009-08-18 Procédé d'attribution de puissance de transmission sur la liaison descendante et appareil correspondant

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PCT/CN2009/000948 WO2011020217A1 (fr) 2009-08-18 2009-08-18 Procédé d'attribution de puissance de transmission sur la liaison descendante et appareil correspondant

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WO2011020217A1 true WO2011020217A1 (fr) 2011-02-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013123881A1 (fr) * 2012-02-24 2013-08-29 电信科学技术研究院 Procédé et dispositif de planification de ressources
CN108235417A (zh) * 2016-12-22 2018-06-29 华为技术有限公司 下行传输方法、基站和终端设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101132601A (zh) * 2007-09-18 2008-02-27 北京邮电大学 基于中继技术的多频点td-scdma组网及通信的实现方法
WO2008035900A1 (fr) * 2006-09-20 2008-03-27 Posdata Co., Ltd. Procédé et appareil attribuant de la puissance à une liaison descendante dans un système de communication sans fil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100684167B1 (ko) * 2005-12-08 2007-02-20 한국전자통신연구원 무선랜에서 주기적 전송 특성을 가진 ＱｏＳ 요구 데이터를위한 주기적 매체 예약 타이머 방법
JP4790544B2 (ja) * 2006-08-31 2011-10-12 富士通株式会社 リレー通信システムにおける再送制御方法及びリレー局装置
CN101170351B (zh) * 2006-10-23 2012-07-04 株式会社Ntt都科摩 一种数据传输方法
CN101394253B (zh) * 2008-10-21 2011-04-06 西安电子科技大学 编码协作通信中降低中断率的功率优化分配方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008035900A1 (fr) * 2006-09-20 2008-03-27 Posdata Co., Ltd. Procédé et appareil attribuant de la puissance à une liaison descendante dans un système de communication sans fil
CN101132601A (zh) * 2007-09-18 2008-02-27 北京邮电大学 基于中继技术的多频点td-scdma组网及通信的实现方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013123881A1 (fr) * 2012-02-24 2013-08-29 电信科学技术研究院 Procédé et dispositif de planification de ressources
CN108235417A (zh) * 2016-12-22 2018-06-29 华为技术有限公司 下行传输方法、基站和终端设备
US10912036B2 (en) 2016-12-22 2021-02-02 Huawei Technologies Co., Ltd. Downlink transmission method, base station, and terminal device

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CN102415167B (zh) 2015-10-07
CN102415167A (zh) 2012-04-11

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