WO2013149439A1 - Procédé d'attribution de puissance et nœud de communication - Google Patents

Procédé d'attribution de puissance et nœud de communication Download PDF

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Publication number
WO2013149439A1
WO2013149439A1 PCT/CN2012/077873 CN2012077873W WO2013149439A1 WO 2013149439 A1 WO2013149439 A1 WO 2013149439A1 CN 2012077873 W CN2012077873 W CN 2012077873W WO 2013149439 A1 WO2013149439 A1 WO 2013149439A1
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WO
WIPO (PCT)
Prior art keywords
power
data stream
antenna
communication node
antennas
Prior art date
Application number
PCT/CN2012/077873
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English (en)
Chinese (zh)
Inventor
朱登魁
宁迪浩
肖华华
李子荣
鲁照华
Original Assignee
中兴通讯股份有限公司
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.)
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2013149439A1 publication Critical patent/WO2013149439A1/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
    • H04W52/30—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
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • 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
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity

Definitions

  • the present invention relates to the field of wireless communications, and in particular to a power distribution method and a communication node in which a control node simultaneously transmits a plurality of data streams.
  • MIMO multiple input multiple output
  • the technology can multiply the capacity and spectrum utilization of the communication system without increasing the bandwidth; multipath can be used to mitigate multipath fading; and the common channel interference can be effectively eliminated, the channel reliability can be improved, and the error can be reduced.
  • Bit rate is a key technology that must be used in a new generation of mobile communication systems.
  • Multi-antenna technology has evolved from traditional point-to-point communication (Single User MIMO (SU-MIMO)) to point-to-multipoint communication (Multi-User MIMO (MU-MIMO)) Whether in point-to-point or point-to-multipoint communication, there is a control node that simultaneously transmits multiple data streams to one terminal or multiple terminals.
  • the control node first calculates a precoding matrix for each data stream by a precoding operation (where the control node calculates the channel coefficients corresponding to the data stream and corresponding optimization criteria), and corresponds each data stream.
  • the data is formed for the data transmitted on each antenna, so that the data transmitted on each antenna is a superposition of the data formed by the multiple data streams, which requires the control node to have a limited power on each antenna.
  • Several data streams are allocated. In the traditional power allocation analysis, it is assumed that the total power of the control node is limited, instead of each antenna power being separately limited, so its power allocation is often in accordance with each of the precoding vectors. The ratio of the square of the absolute value of the element is allocated. In fact, due to the cost, the control node is often one power amplifier per antenna, that is, the transmission power of each antenna is individually limited, which gives the power distribution band.
  • the technical problem to be solved by the embodiments of the present invention is to provide a power allocation method and a communication node, so that the power of each data stream is optimally allocated when the antenna power is limited, thereby improving systemicity.
  • an embodiment of the present invention provides a power allocation method, including: configuring a N antenna by a communication node, and transmitting f data streams simultaneously on each antenna;
  • the communication node allocates power Pnk to the A data stream on the /th antenna according to the following conditions :
  • the sum of the powers allocated by the data streams on the "antenna" does not exceed the maximum transmit power of the antenna a;
  • the sum of the powers allocated by the kth data stream on the N antennas does not exceed the power of the kth data stream;
  • the resource block includes one or more of the following: one subcarrier in an Orthogonal Frequency Division Multiplexing (OFDM) technology system;
  • OFDM Orthogonal Frequency Division Multiplexing
  • the above method also has the following features:
  • the communication node allocates power / ⁇ including:
  • the communication node adaptively allocates power Pnk according to channel state information of each data stream.
  • the above method also has the following features:
  • A is a coefficient matrix
  • an embodiment of the present invention further provides a communication node, including: a configuration module, configured to configure N antennas, and simultaneously transmit f data streams on each antenna;
  • An allocation module configured to allocate power to the A data stream on the "antennas", wherein the following constraints are met:
  • the sum of the powers allocated by the data streams on the "antenna" does not exceed the maximum transmit power of the antenna a;
  • the resource block includes one or more of the following: one subcarrier in an Orthogonal Frequency Division Multiplexing (OFDM) technology system;
  • OFDM Orthogonal Frequency Division Multiplexing
  • OFDM orthogonal frequency division multiplexing
  • the configuration module is configured to adaptively allocate power according to channel state information of each data stream.
  • the above communication node also has the following features:
  • the configuration module includes:
  • a first unit disposed in the stream of power G k and transmission power of each antenna configuration is obtained based on each data to all possible power allocation scheme:
  • A is a coefficient matrix
  • the fourth unit which is set to distribute power.
  • the power allocation method and the communication node provided by the embodiments of the present invention can optimally allocate the power of each data stream when the antenna power is limited, thereby improving system performance.
  • FIG. 1 is a flowchart of a power allocation method according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a communication node according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a configuration module according to an embodiment of the present invention. Preferred embodiment of the invention
  • FIG. 1 is a flowchart of a power allocation method according to an embodiment of the present invention. As shown in FIG. 1, the method in this embodiment includes the following steps:
  • the communication node is configured with N antennas, and f data streams are simultaneously transmitted on each antenna;
  • the communication node allocates power Pnk to the A data stream on the “first antenna.”
  • the control node allocates power on each antenna to a given resource according to the following conditions. Multiple data streams transmitted simultaneously:
  • the sum of the powers allocated by the data streams on the N antennas does not exceed the power of the A-th data stream, ie
  • the current resource block may be a subcarrier in an OFDM (Orthogonal Frequency Division Multiplexing) system or an OFDMA (Orthogonal Frequency Division Multiple Access) system, or It is a plurality of subcarriers on the same OFDM symbol, or a resource block composed of a plurality of subcarriers in the frequency domain of a plurality of OFDM symbols in the time domain.
  • OFDM Orthogonal Frequency Division Multiplexing
  • OFDMA Orthogonal Frequency Division Multiple Access
  • the communication node adaptively allocates power according to channel state information of each data stream.
  • the adaptively allocated power comprises: the communication node uses the power constraint of each data stream and the transmit power constraint of each antenna to obtain all possible power allocation schemes, all possible power allocation schemes form a subspace, and then A desired power allocation vector for each data stream on each antenna is projected into said subspace to find a final power allocation scheme;
  • the calculation method of the power allocation scheme is:
  • each row containing a service + 1 element, the element A ( ) at the _/ ⁇ column position of the first row of the above matrix belongs to the set ⁇ , ⁇ ,- ⁇ , , ⁇ , ⁇ ,- ⁇ ...- ⁇ , ⁇ ..., ; or write the coefficients of each equation except the unknowns into a column in the matrix, which is formed in total.
  • each column contains a service + 1 element, the element of the first row of the above matrix -( ⁇ , -(3 ⁇ 4 ;
  • the operation of projecting the expected power vector into the solution subspace of the equation is:
  • ⁇ ( ⁇ - ⁇ ⁇ ( ⁇ ⁇ ) _1 ⁇ )? , ⁇ is the power scale factor on each antenna;
  • r is the expected power allocation vector of all data streams on all antennas, the specific value of which is determined by the control node according to the corresponding channel coefficients of the data stream Obtaining, for example, the square of the magnitude of the coefficient of the precoding vector corresponding to the data stream, ie Rnk is the expected power allocation vector of the first data stream on the "one antenna".
  • ⁇ represents the power allocated by the first "data stream" on the first antenna
  • the communication node allocates power.
  • the power of the control node is maximized, and the almost optimal allocation under the condition of limited line power per day improves the power in the useful direction.
  • the utilization rate ultimately improves the spectral efficiency of the system, and the calculation is very simple and easy to implement.
  • the data stream, and the power allocated to each data stream by the pre-allocation method is equal, that is, the pre-coding vectors corresponding to the two data streams are:
  • A [A b]: 0 1 0 0 0 1 0 0 Q
  • the power allocation vector is then scaled such that the sum of all allocated powers equals the sum of all antenna powers of the control nodes:
  • Different data streams, and the power allocated to each data stream by the pre-allocation method is equal, that is, the pre-coding vectors corresponding to the two data streams are:
  • the arrays are:
  • ⁇ represents the power allocated by the "data stream" on the A-th antenna.
  • the vectors are:
  • the power allocation vector is then scaled such that the sum of all allocated powers is equal to the sum of all antenna powers of the control node:
  • FIG. 2 is a schematic diagram of a communication node according to an embodiment of the present invention. As shown in FIG. 2, the communication node of this embodiment includes:
  • a configuration module configured to configure N antennas, and transmit f data streams simultaneously on each antenna; an allocation module configured to allocate power to the A data stream on the “antennas”, wherein the following constraints are met : the sum of the powers allocated by the data streams on the "antennas” does not exceed the maximum transmit power of the antennas; the sum of the powers of the kth data streams allocated on the N antennas does not exceed the kth data stream Power
  • the communication node is pre-allocated to the power of the kth data stream on the current resource block;
  • the resource block includes one or more of the following:
  • OFDM Orthogonal Frequency Division Multiplexing
  • the configuration module is adaptively allocated according to channel state information of each data stream. Powerful.
  • the configuration module may include:
  • a first unit which is configured to construct a set of metrics according to the power year G k of each data stream and the transmit power of each antenna to obtain all possible power allocation schemes:
  • A is a coefficient matrix
  • ⁇ represents the power allocated by the "data stream" on the A-th antenna
  • the fourth unit which is set to distribute power.
  • the power allocation method and communication node of the embodiments of the present invention can optimally allocate the power of each data stream when the antenna power is limited, thereby improving system performance.

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

Abstract

L'invention concerne un procédé d'attribution de puissance et un nœud de communication. Le procédé comprend les étapes suivantes : un nœud de communication configure N antennes, et chaque antenne émet simultanément K flux de données ; le nœud de communication attribut une puissance Pnk au k-ième flux de données sur la n-ième antenne selon les conditions suivantes : la somme des puissances attribuées des K flux de données sur la n-ième antenne n'est pas supérieure à la puissance d'émission maximale Qn de l'antenne ; la somme de la puissance attribuée du k-ième flux de données sur les N antennes n'est pas supérieure à la puissance Gk du k-ième flux de données, Gk étant la puissance attribuée à l'avance par le nœud de communication au k-ième flux de données sur un bloc de ressource actuel. Le procédé peut être appliqué pour attribuer de manière optimale la puissance de chaque flux de données lorsque la puissance d'antenne est limitée, ce qui améliore les performances du système.
PCT/CN2012/077873 2012-04-06 2012-06-29 Procédé d'attribution de puissance et nœud de communication WO2013149439A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201210100928.8A CN103369657B (zh) 2012-04-06 2012-04-06 一种功率分配方法和通信节点
CN201210100928.8 2012-04-06

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CN104954051A (zh) * 2014-03-31 2015-09-30 富士通株式会社 脉冲成型滤波器的优化装置、发射机及方法
CN107710838B (zh) * 2015-06-28 2021-09-03 梁平 一种在无线通信系统中进行功率分配和预编码矩阵计算的方法
CN105744631B (zh) * 2016-04-25 2017-03-01 陕西师范大学 多址接入系统上下行链路功率的分配方法和装置
CN108235417B (zh) * 2016-12-22 2021-03-30 华为技术有限公司 下行传输方法、基站和终端设备
US10999803B2 (en) * 2017-08-16 2021-05-04 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Signal transmission method and terminal device

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CN1862985A (zh) * 2005-05-11 2006-11-15 中兴通讯股份有限公司 多信道多天线系统中已知信道信息的功率分配方法
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CN103369657A (zh) 2013-10-23

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