WO2012109784A1 - 移动终端、微基站、宏基站、通信系统及通信方法 - Google Patents

移动终端、微基站、宏基站、通信系统及通信方法 Download PDF

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Publication number
WO2012109784A1
WO2012109784A1 PCT/CN2011/070974 CN2011070974W WO2012109784A1 WO 2012109784 A1 WO2012109784 A1 WO 2012109784A1 CN 2011070974 W CN2011070974 W CN 2011070974W WO 2012109784 A1 WO2012109784 A1 WO 2012109784A1
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WO
WIPO (PCT)
Prior art keywords
base station
subframe
micro base
mobile terminal
information
Prior art date
Application number
PCT/CN2011/070974
Other languages
English (en)
French (fr)
Inventor
张翼
张元涛
兰元荣
周华
吴建明
Original Assignee
富士通株式会社
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 富士通株式会社 filed Critical 富士通株式会社
Priority to CN201180053285.XA priority Critical patent/CN103202042B/zh
Priority to PCT/CN2011/070974 priority patent/WO2012109784A1/zh
Publication of WO2012109784A1 publication Critical patent/WO2012109784A1/zh
Priority to US13/955,729 priority patent/US20130315087A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022Site diversity; Macro-diversity
    • H04B7/024Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/10Scheduling measurement reports ; Arrangements for measurement reports
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H04W52/244Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006Arrangements for removing intersymbol interference
    • H04L2025/03777Arrangements for removing intersymbol interference characterised by the signalling
    • H04L2025/03802Signalling on the reverse channel
    • H04L2025/03808Transmission of equaliser coefficients

Definitions

  • Mobile terminal micro base station, macro base station, communication system and communication method
  • the present invention relates to a transmission technology in a communication system, and more particularly to an LTE-A heterogeneous network system and a mobile terminal, a micro base station, a macro base station therein, and a method used in the mobile terminal, the micro base station, and the macro base station .
  • Background technique
  • the long term evolution of 3GPP follows the traditional homogeneous network, which consists of a hexagonal honeycomb system.
  • the Next Generation Wireless Communication System Advanced Long Term Evolution (LTE-Advanced) introduces a Heterogeneous Network.
  • the LTE-A system may be composed of a macro cell, a femto cell, a pico cell, a remote radio head (RRH), and a relay.
  • RRH remote radio head
  • RRH remote radio head
  • RRH remote radio head
  • a cell extension technique is employed in order to increase the cell capacity.
  • Fig. 1 is a diagram showing the expansion of a cell area in a mixed cell scenario.
  • some mobile stations sometimes referred to as mobile terminals
  • it is subject to strong interference from the macro cell, and an enhanced interference coordination scheme is needed to ensure reliable operation of these mobile stations.
  • ABS sub-frame
  • the PDCCH and the PDSCH of the macro cell are not transmitted, and the PDCCH and the PDSCH corresponding to the micro cell are not interfered by the macro cell, so that the user in the area expansion area of the micro cell can be reliably transmitted in the ABS subframe.
  • the region expansion technique when a large offset value is used, there is a problem in reliable reception of the control channel of the microcell; when a small offset value is used, the control channel of the microcell can be reliably received.
  • two measurement subsets are defined. One of the subsets is used to measure the interference information of the corresponding ABS subframe; the other subset is used to measure the interference information of the corresponding non-ABS subframe.
  • the user terminal feeds back corresponding channel state information on the configured measurement subset.
  • the inventors of the present invention have found in the process of studying the present invention that the conventional ABS subframe method can reduce the interference of the signal transmitted by the macro cell base station to the signal transmitted by the micro cell base station, but has such a disadvantage.
  • the macro cell resources are idle, the services provided by the micro cells cannot be given more help, that is, they can only do not interfere, and cannot contribute to improving the services of the micro cells. Summary of the invention
  • the present invention has been made in view of the above-described circumstances of the prior art to overcome or alleviate one or more of the disadvantages of the prior art.
  • a communication method for use in a mobile terminal comprising the steps of: receiving a step of receiving a designation of a specific subframe and designation of a feedback mode from a micro base station; Determining whether the current subframe is a specific subframe specified by the micro base station; and a feedback step, when the current subframe is a specific subframe specified by the micro base station, the current subframe according to the joint transmission feedback mode The channel condition is measured and fed back. When the current subframe is not the specific subframe specified by the micro base station, the channel condition of the current subframe is measured and fed back according to the feedback mode specified by the micro base station.
  • a mobile terminal includes: a receiving unit that receives a designation of a specific subframe and a designation of a feedback mode from a micro base station; and a determining unit that determines whether the current subframe is a specific subframe specified by the micro base station; a feedback unit, when the current subframe is a specific subframe specified by the micro base station, feedbacking a channel condition of a current subframe according to a joint transmission feedback mode, When the current subframe is not the specific subframe specified by the micro base station, feedback is performed on the channel condition of the current subframe according to the feedback mode specified by the micro base station.
  • a method for use in a micro base station comprising: a receiving step of receiving, from a macro base station, information about an almost null subframe configured by a macro base station, and receiving a channel from a mobile terminal a step of specifying a feedback mode and designating, according to the information about the almost empty subframe, a subframe corresponding to the almost empty subframe used by the micro base station as a specific subframe; sending step, moving Transmitting, by the terminal, information about the specific subframe and the feedback mode, and transmitting, to the macro base station, data that the macro base station should send to the mobile terminal in the almost empty subframe, and the data is in the a location in the null subframe, transmitting data to the mobile terminal in the specific subframe; a feedback processing step, when the received channel feedback information is for the specific subframe, according to the channel feedback information according to the channel feedback information Is processed by channel feedback information of the joint transmission mode, when the received channel feedback information is not for the special Sub
  • a micro base station is provided, and the micro base station includes
  • the receiving unit receives, from the macro base station, information about an almost null subframe configured by the macro base station, and receives the information from the mobile terminal.
  • Receiving channel feedback information ; specifying a unit, the specifying unit specifying a feedback mode, and designating, according to the information about the almost empty subframe, a subframe corresponding to the almost null subframe used by the micro base station as a specific subframe a sending unit, the sending unit transmitting, to the mobile terminal, information about the specific subframe and the feedback mode, and transmitting, to the macro base station, the macro base station to send to the mobile terminal in the almost empty subframe And the location of the data in the almost empty subframe, and transmitting data to the mobile terminal in the specific subframe; a feedback processing unit, when the channel feedback information received by the receiving unit is specific to the In the case of a subframe, the channel feedback information is processed according to channel feedback information that the channel feedback information is a joint transmission mode, and when the channel feedback information received by the receiving unit is not for the specific subframe, The
  • a macro base station includes a first transmitting unit that transmits information about an almost null subframe to a micro base station, and a receiving unit that receives data from the micro base station and is related to Information about a position of the data on the almost empty subframe; a second sending unit, transmitting, by the receiving unit, the location specified by the location information received by the receiving unit on the almost empty subframe The data.
  • a communication system comprising the mobile terminal, the micro base station and the macro base station described above.
  • FIG. 1 is a schematic diagram showing cell area expansion in a mixed cell scenario.
  • Figure 2 shows a schematic diagram of a macro-micro multipoint cooperative communication system in accordance with the present invention.
  • FIG. 3 is a flow chart showing the operation of a macro-micro multipoint cooperative transmission system in accordance with an embodiment of the present invention.
  • FIG. 4 is a schematic diagram showing a mobile phone used as an example of a mobile terminal (user equipment) according to an embodiment of the present invention.
  • Figure 5 shows a schematic functional block diagram of a mobile station in accordance with an embodiment of the present invention.
  • FIG. 6 shows a schematic functional block diagram of a micro base station in accordance with an embodiment of the present invention.
  • FIG. 7 shows a schematic functional block diagram of a macro base station in accordance with an embodiment of the present invention.
  • FIG. 8 shows a flow diagram of a process performed at a mobile terminal in accordance with an embodiment.
  • Figure 9 shows a flow diagram of a process performed at a micro base station in accordance with an embodiment.
  • Fig. 10 is a view showing a comparison of the conventional elCIC scheme and the ABS data transmission situation in the technical scheme according to the present invention. detailed description
  • the present invention is applicable to the case of a heterogeneous network, i.e., a case where one large cell contains one or more small cells.
  • This large cell is referred to as a macro cell, and this small cell is referred to as a micro cell.
  • the micro cell may be, for example, a femto cell, a pico cell, a relay station, an RRH, or the like.
  • the base station used in the micro cell is called a micro base station, and the base station used in the macro cell is called a macro base station.
  • a communication system to which an embodiment of the present invention can be applied is, for example, as shown in FIG.
  • the diagram of Figure 1 is also exemplary. For example, there may be more micro base stations and more macro base stations, and more users may be available.
  • Fig. 2 shows a schematic diagram of a macro-micro multipoint cooperative communication system (also referred to as a joint transmission communication system) in accordance with the present invention.
  • the base stations are connected through an interface (such as an X2 interface).
  • the macro base station or the micro base station coordinates to determine whether cooperation between the macro base station and the micro base station is required.
  • the following information can be transmitted between the macro base station and the micro base station: scheduling location information, cooperation information, cooperatively transmitted data, etc., and instructing the mobile terminal to enter the Comp mode.
  • the mobile station needs to measure the channel state information of each base station to the mobile station and feed it back to the serving base station (micro base station).
  • FIG. 3 is a flow chart showing the operation of a macro-micro multipoint cooperative transmission system in accordance with an embodiment of the present invention.
  • step S301 the macro base station transmits information about an almost null subframe to the micro base station, and then in step S302, the micro base station specifies a feedback mode and according to the information about the almost empty subframe, the micro base station The subframe corresponding to the almost empty subframe used by the base station is designated as a specific subframe.
  • step S303 the micro base station transmits information about the specific subframe and the feedback mode.
  • step S304 the mobile station micro base station transmits data to the macro base station and information about the location of the data on the ABS subframe, which data will be transmitted by the macro base station to the mobile station in the ABS subframe.
  • step S305 the macro base station transmits the data received from the micro base station to the mobile station on the ABS according to the received information about the location of the data on the ABS subframe, and in step S306, The base station transmits the same data and associated control information to the mobile station.
  • step S307 the mobile station is connected according to The received information about the feedback mode is subjected to channel quality measurement, and the related information is transmitted as channel feedback information to the micro base station in step S308.
  • the micro base station performs channel feedback information processing in step S309, for example, determines whether cooperation with the macro base station or the like is still required.
  • the feedback mode may be a joint transmission feedback mode for a coordinated joint transmission mode, and a CS/CB feedback mode for a coordinated cooperative cooperative/coordinated beamforming (CS/CB) mode.
  • CS/CB coordinated cooperative/coordinated beamforming
  • non-multipoint cooperative transmission feedback mode for non-multipoint coordinated transmission.
  • FIG. 4 is a schematic diagram showing a mobile phone used as an example of a mobile terminal according to an embodiment of the present invention.
  • An example of a mobile terminal is not limited to a mobile phone.
  • the mobile terminal can also be any device having communication capabilities, such as a gaming machine, a PDA, a portable computer, and the like.
  • the mobile telephone 10 can be a flip type telephone having a flip cover 15 movable between an open position and a closed position. In Figure 4, the flip cover 15 is shown in an open position. It should be understood that the mobile telephone 10 can be of other construction, such as a "longboard phone" or "slide phone".
  • Mobile phone 10 can include display 14.
  • the display 14 displays information such as an operation status, time, telephone number, phone book information, various menus, and the like to the user so that the user can utilize various features of the electronic device 10.
  • Display 14 can also be used to visually display content that is received by electronic device 10 and/or retrieved from a memory (not shown) of mobile phone 10.
  • Display 14 can be used to present images, videos, and other graphics to the user, such as photos, mobile television content, and video related to the game.
  • keyboard 18 provides a variety of user input operations.
  • keyboard 18 may include alphanumeric keys that allow alphanumeric information (e.g., phone number, phone list, phone book information, notepad, text, etc.) to be entered.
  • keyboard 18 may include specific function keys 17, such as a "Call Send” button for initiating or answering a call, and a "Call End” button for ending or “hanging up” the call.
  • the particular function keys can also include menu navigation keys and selection keys that are conveniently navigated through menus displayed on display 14.
  • a pointing device and/or navigation keys can be provided to receive directional inputs from the user.
  • the display 14 and the keyboard 18 can be used in combination with each other to realize the function of the soft keys.
  • the mobile phone 10 also includes components such as an antenna, a microcontroller, a speaker 50, and a microphone 52 to perform its functions.
  • Figure 5 shows a schematic functional block diagram of a mobile station in accordance with an embodiment of the present invention.
  • a mobile phone 10 includes a receiving unit 501, a determining unit 502, and a feedback unit 503.
  • the receiving unit 501 receives the designation of the specific subframe and the designation of the feedback mode from the micro base station.
  • a specific subframe refers to an ABS used by a micro base station and a macro base station. Corresponding subframes.
  • the feedback mode is a joint transmission feedback mode of a multi-point cooperative joint transmission mode, a CS/CB feedback mode, or a non-multipoint cooperative transmission feedback mode for non-multipoint coordinated transmission, in which a non-multipoint cooperative transmission feedback mode (in this paper) Also known as the normal feedback mode) includes multiple transmission modes supported by LTE-A, such as: single antenna port mode, transmit diversity mode, open loop cyclic delay grading mode, closed loop space division multiplexing mode, multi-user MIMO mode, single stream beam Forming mode, dual stream beamforming mode, etc.
  • the receiving unit receives data from the micro base station and the macro base station.
  • the determining unit 502 determines whether the current subframe is a specific subframe specified by the micro base station.
  • the feedback unit 503 measures and feeds back channel conditions of the current subframe according to the joint transmission feedback mode. At this time, measurement and feedback are performed regardless of the feedback mode specified by the micro base station. For example, even if the micro base station specifies a non-multicast cooperative transmission feedback mode, when the determining unit 502 determines that the current subframe is a specific subframe specified by the micro base station, the feedback unit 503 performs the current transmission feedback mode according to the joint transmission feedback mode. The channel conditions of the subframe are measured and fed back. On the other hand, when the current subframe is not a specific subframe specified by the micro base station, the channel condition of the current subframe is fed back according to the feedback mode specified by the micro base station.
  • the receiving unit receives data from both the macro base station and the micro base station based on control information received from the micro base station.
  • a micro base station 600 shows a schematic functional block diagram of a micro base station in accordance with an embodiment of the present invention.
  • a micro base station 600 according to an embodiment of the present invention includes a receiving unit 601, a specifying unit 602, a transmitting unit 603, and a feedback processing unit 604.
  • the receiving unit 601 receives information about an almost null subframe (ABS subframe) configured by the macro base station from the macro base station, and receives channel feedback information from the mobile terminal.
  • ABS subframe almost null subframe
  • the specifying unit 602 specifies, as the specific subframe, a subframe corresponding to the almost null subframe used by the micro base station according to the information about the almost empty subframe, and the specifying unit 602 further specifies a feedback mode.
  • the transmitting unit 603 transmits information about the specific subframe and the feedback mode to the mobile terminal, and transmits, to the macro base station, data to be transmitted by the macro base station to the mobile terminal in the ABS subframe, and the data is in the ABS sub- At a position on the frame, the transmitting unit further transmits the same data to the mobile terminal as the data transmitted to the macro base station in the specific subframe.
  • FIG. 7 shows a schematic functional block diagram of a macro base station in accordance with an embodiment of the present invention.
  • the macro base station 700 according to an embodiment of the present invention includes a first sending unit 701, a receiving unit 702, and a second sending unit 703.
  • the first transmitting unit 701 transmits information about an almost null subframe to the micro base station; the receiving unit 702 receives, from the micro base station, data to be transmitted to the mobile station and information about a location of the data on the almost empty subframe; The second transmitting unit 703 transmits the data received by the receiving unit at the position specified by the receiving unit and the information about the position of the data on the almost empty subframe on the almost empty subframe.
  • Figure 8 illustrates a flow diagram of processing performed at a mobile terminal in accordance with an embodiment.
  • the designation of the specific subframe and the designation of the feedback mode are received from the micro base station.
  • step S802 data from the micro base station and the macro base station is received.
  • step S803 it is determined whether the current subframe received from the micro base station is a specific subframe, that is, whether it is a subframe corresponding to the ABS transmitted by the macro base station.
  • the micro base station may transmit, in advance to the mobile terminal, information about a sequence number of a particular subframe in a frame structure (a form of designation of a particular subframe).
  • step S803 the channel condition is measured according to the macro-multi-point cooperative joint transmission feedback mode.
  • step S805 the channel condition is measured in accordance with the feedback mode specified by the micro base station. Then, in step S806, the channel feedback information is fed back to the micro base station.
  • Figure 9 shows a flow diagram of a process performed at a micro base station in accordance with an embodiment.
  • step S901 information about an almost null subframe from the macro base station is received.
  • the macro base station may send information to the micro base station about the sequence number of the ABS subframe in the frame structure. For example, in the case where one frame includes 10 subframes, for example, data 2, 8 may be transmitted, indicating that the third and ninth subframes in the frame structure are ABS subframes.
  • the micro base station specifies a specific subframe and a feedback mode.
  • the third and ninth subframes in the subframe structure used by the macro base station are ABS subframes
  • the third and ninth subframes in the subframe structure used by the micro base station are correspondingly designated as specific subframes.
  • the feedback mode may be a joint transmission feedback mode, a CS/CB feedback mode, or a non-multipoint coordinated transmission feedback mode.
  • step S903 information about the feedback mode and designation of the specific subframe are transmitted to the mobile terminal.
  • the data information and the scheduling information are transmitted to the mobile terminal.
  • channel feedback information from the mobile terminal is received.
  • step S906 If it is determined in step S906 that the channel feedback information from the mobile station is for a specific subframe, then in step S907, the channel feedback information is processed in the joint transmission feedback mode. On the other hand, if it is determined in step S906 that the channel feedback information from the mobile station is not for a specific subframe, then processing is performed in the feedback mode assigned to the mobile terminal in step S908.
  • Fig. 10 is a view showing a comparison of the conventional elCIC scheme and the ABS data transmission situation in the technical scheme according to the present invention.
  • the left figure in Figure 10 shows a schematic diagram of ABS resolution interference in the conventional elCIC scheme.
  • the right diagram of Fig. 10 shows a technical solution according to the present invention.
  • data is transmitted in an ABS subframe.
  • the macro cell base station also transmits the same information to the mobile station in the ABS subframe, which enhances the cell edge throughput.
  • the micro base station can send activation information to the mobile terminal, e.g., set a particular flag bit to 1 or 0 according to convention.
  • the mobile terminal performs the determination of step S803.
  • the specific flag is set to 0 according to the convention, that is, when the activation information indicates an invalid value, the mobile terminal performs measurement and feedback according to the feedback mode specified by the micro base station.
  • 0 and 1 are merely exemplary, and other values can be agreed upon.
  • the micro base station may determine the transmitted activation information according to whether the mobile terminal is in a cell expansion area.
  • the activation information indicating the valid value is transmitted when it is determined that the mobile terminal is in the cell expansion area, and the activation information indicating the invalid value is transmitted when the mobile terminal is not in the cell extension area.
  • the mobile station in a non-ABS subframe, operates in a conventional CoMP mode, and the mobile terminal can operate in a JP mode or a CS/CB mode.
  • the micro base station configures the CoMP working mode for the mobile station.
  • the mobile station In the ABS subframe, (in some embodiments, when the activation information indicates a valid value), regardless of how the micro base station configures the CoMP mode of operation for the mobile station, the mobile station feeds back in the measurement mode 2 in accordance with the JP mode, including PMI/CQI. information.
  • the mobile station performs feedback in the measurement set 1 according to the CoMP working mode configured by the system.
  • the description of the methods and the steps may be used to facilitate the understanding of the device and the unit, and the description of the device and the unit may be used to help the understanding of the method and the steps.
  • the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a logic component readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to implement the various components described above Method or step.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash, a magneto-optical disk, a memory card, a memory stick, and the like.

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

Description

移动终端、 微基站、 宏基站、 通信系统及通信方法 技术领域
本发明涉及通信系统中的传输技术, 更具体地说, 涉及 LTE-A异构网络系统以及其 中的移动终端、 微基站、 宏基站, 以及所述移动终端、 微基站、 宏基站中使用的方法。 背景技术
3GPP的长期演进方案 (long term evolution) 沿用了传统的同构网络, 它由六角形蜂 窝系统组成。 为了进一步提高系统的容量, 下一代无线通信系统高级长期演进方案 ( LTE- Advanced )引入异构网络( Heterogeneous Network )。 LTE-A系统可由宏小区( Macro Cell)、毫微微蜂窝(Femto Cell)、微微蜂窝(Pico Cell)、远端无线头(RRH)、中继器(Relay) 组成。 它通过部署新的无线节点不仅提高了系统的容量, 而且为特殊区域的用户提供更好 的服务, 优化了系统性能。 然而新部署的节点会对原来部署的小区的用户带来干扰, 甚至 造成某些覆盖的孔洞, 因此需要增强的小区间干扰协调 (enhanced Inter-Cell Interference Coordination, elCIC) 方法来进一步优化系统性能。
在宏小区和微小区 (包括毫微微小区、 微微小区、 中继器、 RRH等) 混合小区场景 下, 为了提高小区容量, 小区扩展技术被采用。 图 1是示出了混合小区场景下小区区域扩 张的示意图。 如图 1所示, 通过改变移动台的小区选择准则, 将部分属于宏小区服务的移 动台 (有时也称为移动终端) 改变到属于微小区服务。 对于小区扩展部分的移动台, 它受 到宏小区较强的干扰, 需要增强干扰协调方案来保证这些移动台的可靠工作。 几乎空子帧 (ABS) 方案被用来减少控制信道和数据信道的干扰。 在 ABS子帧中, 宏小区的 PDCCH 和 PDSCH不进行传输, 微小区对应的 PDCCH和 PDSCH不会受到宏小区的干扰, 于是微 小区中区域扩张区域的用户能够在 ABS子帧中可靠传输。对于区域扩张技术, 当大的偏移 值被使用时, 微小区的控制信道的可靠接收存在问题; 当小的偏移值被使用时, 微小区的 控制信道能够可靠接收。
为了支持 ABS的工作,两个测量子集被定义。其中一个子集用于测量对应 ABS子帧 的干扰信息; 另一个子集用于测量对应非 ABS子帧的干扰信息。用户终端在配置的测量子 集上反馈对应的信道状态信息。
本发明的发明人在研究本发明的过程中发现, 采用常规的 ABS子帧的方法虽然能够 减少宏小区基站传送的信号对微小区基站传送的信号的干扰, 但是却存在这样的缺点, 在 造成宏小区资源闲置的同时, 不能对微小区提供的服务给予更多的帮助, 即只能做到不干 扰, 而不能对提高微小区的服务有所贡献。 发明内容
本发明鉴于现有技术的上述情况提出, 用以克服或缓解现有技术存在的一种或更多 种缺点。
根据本发明的一个方面, 提供了一种在移动终端中使用的通信方法, 所述方法包括以 下步骤: 接收步骤, 从微基站接收对特定子帧的指定和对反馈模式的指定; 判断步骤, 判 断当前的子帧是否是所述微基站所指定的特定子帧; 反馈步骤, 当所述当前的子帧是所述 微基站所指定的特定子帧时, 按照联合传输反馈模式对当前子帧的信道情况进行测量和反 馈, 当所述当前的子帧不是所述微基站所指定的特定子帧时, 按照所述微基站所指定的反 馈模式, 对当前子帧的信道情况进行测量和反馈。
根据本发明的另一个方面, 提供了一种移动终端, 所述移动终端包括: 接收单元, 从 微基站接收对特定子帧的指定和对反馈模式的指定; 判断单元, 判断当前的子帧是否是所 述微基站所指定的特定子帧; 反馈单元, 当所述当前的子帧是所述微基站所指定的特定子 帧时, 按照联合传输反馈模式对当前子帧的信道情况进行反馈, 当所述当前的子帧不是所 述微基站所指定的特定子帧时, 按照所述微基站所指定的反馈模式, 对当前子帧的信道情 况进行反馈。
根据本发明的另一个方面, 提供了一种在微基站中使用的方法, 所述方法包括: 接 收步骤, 从宏基站接收有关于宏基站所配置的几乎空子帧的信息, 从移动终端接收信道反 馈信息; 指定步骤, 指定反馈模式并根据所述有关于几乎空子帧的信息, 将所述微基站所 使用的与所述几乎空子帧对应的子帧指定为特定子帧; 发送步骤, 向移动终端发送有关于 所述特定子帧和所述反馈模式的信息, 向所述宏基站发送所述宏基站应在所述几乎空子帧 发送给所述移动终端的数据以及所述数据在所述几乎空子帧中的位置, 在所述特定子帧向 所述移动终端发送数据; 反馈处理步骤, 当所接收的信道反馈信息针对所述特定子帧时, 将所述信道反馈信息按照所述信道反馈信息是联合传输模式的信道反馈信息进行处理, 当 所接收的信道反馈信息未针对所述特定子帧时, 将所述信道反馈信息按照所述信道反馈信 息是所述指定单元所指定的反馈模式的信道反馈信息进行处理。
根据本发明的另一个方面, 提供了一种微基站, 所述微基站包括
接收单元, 从宏基站接收有关于宏基站所配置的几乎空子帧的信息, 从移动终端接 收信道反馈信息; 指定单元, 所述指定单元指定反馈模式并根据所述有关于几乎空子帧的 信息, 将所述微基站所使用的与所述几乎空子帧对应的子帧指定为特定子帧; 发送单元, 所述发送单元向移动终端发送有关于所述特定子帧和所述反馈模式的信息, 向所述宏基站 发送所述宏基站应在所述几乎空子帧发送给所述移动终端的数据以及所述数据在所述几 乎空子帧中的位置, 以及在所述特定子帧向所述移动终端发送数据; 反馈处理单元, 当所 述接收单元所接收的信道反馈信息针对所述特定子帧时, 将所述信道反馈信息按照所述信 道反馈信息是联合传输模式的信道反馈信息进行处理, 当所述接收单元所接收的信道反馈 信息未针对所述特定子帧时, 将所述信道反馈信息按照所述信道反馈信息是所述指定单元 所指定的反馈模式的信道反馈信息进行处理。
根据本发明的另一个方面, 提供了一种宏基站, 所述宏基站包括第一发送单元, 向 微基站发送有关于几乎空子帧的信息; 接收单元, 从所述微基站接收数据以及有关于所述 数据在所述几乎空子帧上的位置的信息; 第二发送单元, 在所述几乎空子帧上按照所述接 收单元所接收的所述位置信息所指定的位置, 发送所述接收单元接收的数据。
根据本发明的另一个方面, 提供了一种通信系统, 所述通信系统包括以上所述的移 动终端、 微基站和宏基站。
以上的一般说明和以下结合附图的详细说明都是示意性的, 不是对本发明的保护范 围的限制。 附图说明
从以下参照附图对本发明的详细描述中, 将更清楚地理解本发明的以上和其它目的、 特征和优点。
图 1是示出了混合小区场景下小区区域扩张的示意图。
图 2示出了依据本发明的宏微多点合作通信系统的示意图。
图 3示出了依据本发明一种实施方式的宏微多点合作传输系统的操作流程图。
图 4 是示出了作为根据本发明的实施方式的移动终端 (用户设备) 的示例使用的移 动电话的示意图。
图 5示出了依据本发明一种实施方式的移动台的示意性功能方框图。
图 6示出了依据本发明一种实施方式的微基站的示意性功能方框图。
图 7示出了依据本发明一种实施方式的宏基站的示意性功能方框图。
图 8示出了依据一种实施方式在移动终端处执行的处理的流程图。 图 9示出了依据一种实施方式在微基站处执行的处理的流程图。
图 10示出了常规 elCIC方案和依据本发明的技术方案中的 ABS数据发送情况的对比 示意图。 具体实施方式
下面参照附图描述本发明的具体实施方式。 应该注意, 针对一种实施方式描述和 /或 示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用, 与其它实施方 式中的特征相组合, 或替代其它实施方式中的特征。
应该强调, 术语"包括 /包含"在本文使用时指特征、 要件、 步骤或组件的存在, 但并 不排除一个或更多个其它特征、 要件、 步骤或组件的存在或附加。
本发明适用于异构网络的情况, 即一个大的小区中包含一个或更多个小的小区的情 况。 将该大的小区称为宏小区, 将该小的小区称为微小区。 该微小区例如可以是毫微微蜂 窝小区、 微微蜂窝小区、 中继站、 RRH等。 微小区中使用的基站称为微基站, 宏小区中使 用的基站称为宏基站。 可以应用本发明实施方式的通信系统例如如图 1所示。 图 1的图也 只是示例性的, 例如可以有更多个的微基站和更多个的宏基站, 更可以有更多的用户。
图 2 示出了依据本发明的宏微多点合作通信系统 (也称联合传输通信系统) 的示意 图。 如图 2所示, 基站之间通过接口 (比如 X2接口) 相连。 首先宏基站或微基站协调确 定是否需要进行宏基站和微基站的合作。 当确定需要进行合作时, 宏基站和微基站之间可 以传输例如以下的信息: 调度位置信息, 协作信息, 合作传输的数据等, 并可指示移动终 端进入 Comp模式。为了实现合作传输,移动台需要测量各基站到移动台的信道状态信息, 并将它反馈给服务基站 (微基站)。
图 3示出了依据本发明一种实施方式的宏微多点合作传输系统的操作流程图。
如图 3所示, 首先, 在步骤 S301 , 宏基站向微基站发送有关于几乎空子帧的信息, 然后在步骤 S302, 微基站指定反馈模式并根据该有关几乎空子帧的信息, 将所述微基站所 使用的与所述几乎空子帧对应的子帧指定为特定子帧。 接着, 在步骤 S303 中, 微基站将 有关于特定子帧和反馈模式的信息发送给。此外, 在步骤 S304, 移动台微基站向宏基站发 送数据以及有关于所述数据在所述 ABS子帧上的位置的信息, 该数据将由宏基站在 ABS 子帧中发送给移动台。 然后在步骤 S305 中, 宏基站根据所接收的有关于所述数据在所述 ABS子帧上的位置的信息, 将从微基站接收的数据在 ABS上发送给移动台, 同时在步骤 S306, 微基站将相同的数据和有关的控制信息发送给移动台。在步骤 S307, 移动台根据接 收的有关于反馈模式的信息, 进行信道质量测量, 并在步骤 S308将相关信息作为信道反 馈信息发送给微基站。 微基站在步骤 S309进行信道反馈信息处理, 例如判断是否仍然需 要进行与宏基站的合作等。
在一种实施方式中, 反馈模式可以是针对多点合作联合传输 (Joint Transmission) 模 式的联合传输反馈模式、针对多点合作协作调度 /协作波束成形(CS/CB )模式的 CS/CB 反 馈模式或针对非多点合作传输的非多点合作传输反馈模式。
应该注意, 上面的描述只是示意性的, 本领域的技术人员应该意识到, 以上的步骤 的顺序可以调整, 并且有些步骤可以并行进行。
图 4 是示出了作为根据本发明的实施方式的移动终端的示例使用的移动电话的示意 图。 移动终端的示例不限于移动电话。 移动终端也可以是具有通信能力的任何设备, 例如 游戏机、 PDA、 便携式电脑等。 如图 4所示, 移动电话 10可以是具有可在打开位置与闭合 位置之间移动的翻盖 15的翻盖型电话。 图 4中, 翻盖 15被示出为处于打开位置。 应了解 的是, 移动电话 10可以为其它结构, 诸如 "长板型电话"或 "滑盖型电话" 的结构。
移动电话 10可包括显示器 14。显示器 14向用户显示诸如操作状态、时间、电话号码、 电话簿信息、 各种菜单等的信息, 使得用户能利用电子设备 10的各种特征。 显示器 14还 可以用于可视地显示电子设备 10接收到的和 /或从移动电话 10的存储器 (未示出)检索到 的内容。 显示器 14可用于向用户呈现图像、 视频和其他图形, 诸如相片、 移动电视内容 以及与游戏相关的视频。
键盘 18提供了多种用户输入操作。 例如, 键盘 18可包括允许输入字母数字信息 (诸 如, 电话号码、 电话列表、 电话簿信息、 记事本、 文本等) 的字母数字键。 此外, 键盘 18 可包括特定的功能键 17, 诸如用于启动或应答电话的 "呼叫发送"键、 以及用于结束或者 "挂断" 电话的 "呼叫结束"键。 特定的功能键还可以包括在显示在显示器 14 上的菜单 来方便地进行导航的菜单导航键和选择键。 例如, 可以提供指点设备和 /或导航键以接收 来自用户的方向性输入。 此外, 显示器 14和键盘 18可以彼此结合起来使用以实现软键的 功能。 移动电话 10中还包括天线、 微控制器、 扬声器 50和麦克风 52等实现其功能所必 须的部件。
图 5示出了依据本发明一种实施方式的移动台的示意性功能方框图。
如图 5所示, 依据本发明一种实施方式的移动电话 10包括接收单元 501、 判断单元 502、 反馈单元 503。 接收单元 501从微基站接收对特定子帧的指定和对反馈模式的指定。 如上所述, 在本发明的一种实施方式中, 特定子帧是指微基站所使用的与宏基站的 ABS 相对应的子帧。 反馈模式是指针对多点合作联合传输模式的联合传输反馈模式、 CS/CB反 馈模式或针对非多点合作传输的非多点合作传输反馈模式, 其中非多点合作传输反馈模式 (在本文中也称通常反馈模式)包括 LTE-A支持的多种传输模式,例如:单天线端口模式、 传送分集模式、 开环循环延迟分级模式、 闭环空分复用模式、 多用户 M I M O模式、 单流 波束赋型模式、双流波束赋型模式等等。然后, 接收单元接收来自微基站和宏基站的数据。 判断单元 502判断当前的子帧是否是所述微基站所指定的特定子帧。 当所述当前的子帧是 所述微基站所指定的特定子帧时, 所述反馈单元 503按照联合传输反馈模式对当前子帧的 信道情况进行测量并反馈。 此时, 与所述微基站指定的反馈模式无关地进行测量和反馈。 例如即便微基站指定的是非多点合作传输反馈模式, 当判断单元 502判断出当前的子帧是 所述微基站所指定的特定子帧时, 所述反馈单元 503也按照联合传输反馈模式对当前子帧 的信道情况进行测量并反馈。 另一方面, 当所述当前的子帧不是所述微基站所指定的特定 子帧时, 按照所述微基站所指定的反馈模式, 对当前子帧的信道情况进行反馈。
此外, 在所述微基站所指定的特定子帧, 所述接收单元根据从微基站接收的控制信 息接收来自宏基站和所述微基站两者的数据。
图 6示出了依据本发明一种实施方式的微基站的示意性功能方框图。 如图 6所示, 依据本发明一种实施方式的微基站 600包括接收单元 601、 指定单元 602、 发送单元 603 以及反馈处理单元 604。
接收单元 601从宏基站接收有关于宏基站所配置的几乎空子帧(ABS子帧)的信息, 从移动终端接收信道反馈信息。
指定单元 602根据所述有关于几乎空子帧的信息, 将所述微基站所使用的与所述几 乎空子帧对应的子帧指定为特定子帧, 所述指定单元 602还指定反馈模式。
发送单元 603 向移动终端发送有关于所述特定子帧和所述反馈模式的信息, 并向宏 基站发送要由所述宏基站在 ABS子帧发送给移动终端的数据以及所述数据在 ABS子帧上 的位置, 所述发送单元还在所述特定子帧向所述移动终端发送与发送给宏基站的数据相同 数据。
当接收单元 601 从移动终端所接收的信道反馈信息针对所述特定子帧时, 反馈处理 单元 604将所述信道反馈信息按照所述信道反馈信息是联合传输反馈模式的信道反馈信息 进行处理, 当所述接收单元 601所接收的信道反馈信息未针对所述特定子帧时, 将所述信 道反馈信息按照所述信道反馈信息是所述指定单元所指定的反馈模式的信道反馈信息进 行处理。 图 7示出了依据本发明一种实施方式的宏基站的示意性功能方框图。 如图 7示, 依 据本发明一种实施方式的宏基站 700包括第一发送单元 701、 接收单元 702以及第二发送 单元 703。
第一发送单元 701 向微基站发送有关于几乎空子帧的信息; 接收单元 702从微基站 接收将要发送给移动台的数据以及有关于所述数据在所述几乎空子帧上的位置的信息; 第 二发送单元 703, 在所述几乎空子帧上按照所述接收单元所接收的有关于所述数据在所述 几乎空子帧上的位置的信息所指定的位置, 发送所述接收单元接收的数据。
图 8示出了依据一种实施方式在移动终端处执行的处理的流程图。 如图 8所示, 首 先在 S801, 从微基站接收对特定子帧的指定和对反馈模式的指定。 然后, 在步骤 S802, 接收来自微基站和宏基站的数据。接着, 在步骤 S803 , 判断从微基站接收的当前子帧是否 是特定子帧, 即, 是否是与宏基站发送的 ABS对应的子帧。在一种实施方式中, 微基站可 以预先向移动终端发送有关于特定子帧在帧结构中的序号的信息 (一种形式的对特定子帧 的指定)。 例如在一帧包括 10个子帧的情况下, 可以传送例如数据 2、 8, 表示该帧中的第 3、 第 9个子帧是特定子帧。 当移动台确定当前子帧是第 3子帧或第 9子帧时, 可以确定 出当前子帧是特定子帧。 当在步骤 S803判断出当前子帧是特定子帧时, 在步骤 S804, 按 照宏微多点合作联合传输反馈模式对信道情况进行测量。 另一方面, 如果在步骤 S803 判 断出当前子帧不是特定子帧, 则在步骤 S805 , 按照微基站指定的反馈模式对信道情况进行 测量。 然后, 在步骤 S806, 将信道反馈信息反馈给微基站。
图 8的操作应与图 3的流程图相配合地理解。例如 S801与 S304相对应, S802与 S305 和 S306相对应。 其余的步骤与 S307和 S308相对应。
图 9示出了依据一种实施方式在微基站处执行的处理的流程图。 如图 9所示, 首先, 在步骤 S901 , 接收来自宏基站的有关于几乎空子帧的信息。在一种实施方式中, 宏基站可 以向微基站发送有关于 ABS子帧在帧结构中的序号的信息。 例如在一帧包括 10个子帧的 情况下,可以传送例如数据 2、 8,表示该帧结构中的第 3、第 9个子帧是 ABS子帧。然后, 在步骤 S902, 微基站指定特定子帧和反馈模式。 例如宏基站使用的子帧结构中第 3、 第 9 个子帧是 ABS子帧的情况下, 相应地将微基站使用的子帧结构中的第 3、第 9个子帧指定 为特定子帧。反馈模式可以是联合传输反馈模式、 CS/CB 反馈模式或非多点合作传输反馈 模式。然后,在步骤 S903 ,将有关于反馈模式的信息和对特定子帧的指定发送给移动终端。 接着, 在步骤 S904, 将数据信息和调度信息发送给移动终端。 在步骤 S905 , 接收来自移 动终端的信道反馈信息。在步骤 S906, 判断来自移动台的信道反馈信息是否是针对特定子 帧的。 如果在步骤 S906判断出来自移动台的信道反馈信息是针对特定子帧的, 则在步骤 S907, 对该信道反馈信息按联合传输反馈模式进行处理。 另一方面, 如果在步骤 S906判 断出来自移动台的信道反馈信息不是针对特定子帧的, 则在步骤 S908 按指定给移动终端 的反馈模式进行处理。
图 10示出了常规 elCIC方案和依据本发明的技术方案中的 ABS数据发送情况的对比 示意图。 图 10中左图给出了常规 elCIC方案中的 ABS解决干扰的示意图。 从图中可以看 出, 在常规情况下, 对于宏基站, 在 ABS子帧中不传送数据。 图 10的右图给出了依据本 发明的技术方案, 从图中可以看出, 依据本发明的实施方式, 对于宏基站, 在 ABS子帧中 传送数据。 从图 10中可以看出, 宏小区基站在 ABS子帧中也向移动台传输相同信息, 增 强了小区边缘吞吐量。
在另外的实施方式中, 微基站可以向移动终端发送激活信息, 例如将特定的标志位按 照约定设置为 1或 0。 例如根据约定, 当将特定的标志位按照约定设置为 1时, 即激活信 息指示有效值时, 移动终端才进行步骤 S803 的判断。 而在将特定的标志位按照约定设置 为 0时, 即激活信息指示无效值时,移动终端按照微基站指定的反馈模式进行测量和反馈。 这里 0和 1仅仅是示例性的, 可以约定其他的值。
在一种实施方式中, 微基站可以根据移动终端是否处于小区扩张区域来确定发送的激 活信息。 在判断出移动终端处于小区扩张区域时发送指示有效值的激活信息, 而在移动终 端未处于小区扩展区域时, 发送指示无效值的激活信息。
在本发明的实施方式中, 在非 ABS子帧中, 移动台工作在传统的 CoMP模式下, 移 动终端可以工作在 JP模式或 CS/CB模式。 微基站为移动台配置 CoMP工作模式。 在 ABS 子帧, (在一些实施方式中, 在激活信息指示有效值时) 不管微基站为移动台配置 CoMP 工作模式如何, 移动台都在测量集 2中按照 JP模式进行反馈, 包括 PMI/CQI信息。 在非 ABS子帧, 移动台在测量集 1中按照系统配置的 CoMP工作模式进行反馈。
在对本发明的实施方式的描述中, 对方法、 步骤的描述可以用来帮助对装置、 单元的 理解, 对装置、 单元的描述可以用来帮助对方法、 步骤的理解。
本发明以上的装置和方法可以由硬件实现, 也可以由硬件结合软件实现。 本发明涉 及这样的逻辑部件可读程序, 当该程序被逻辑部件所执行时, 能够使该逻辑部件实现上文 所述的装置或构成部件, 或使该逻辑部件实现上文所述的各种方法或步骤。 逻辑部件例如 现场可编程逻辑部件、 微处理器、 计算机中使用的处理器等。 本发明还涉及用于存储以上 程序的存储介质, 如硬盘、 磁盘、 光盘、 DVD、 flash, 磁光盘、 存储卡、 存储棒等等。 以上结合具体的实施方式对本发明进行了描述, 但本领域技术人员应该清楚, 这些描 述都是示例性的, 并不是对本发明保护范围的限制。 本领域技术人员可以根据本发明的精 神和原理对本发明做出各种变型和修改, 这些变型和修改也在本发明的范围内。

Claims

权利要求书
1、 一种在移动终端中使用的通信方法, 所述方法包括以下步骤:
接收步骤, 从微基站接收对特定子帧的指定和对反馈模式的指定;
判断步骤, 判断当前的子帧是否是所述微基站所指定的特定子帧;
反馈步骤, 当所述当前的子帧是所述微基站所指定的特定子帧时, 按照联合传输反 馈模式对当前子帧的信道情况进行测量和反馈, 当所述当前的子帧不是所述微基站所指定 的特定子帧时, 按照所述微基站所指定的反馈模式, 对当前子帧的信道情况进行测量和反 馈。
2、 根据权利要求 1所述的通信方法, 其中, 所述方法还包括如下步骤:
在所述微基站所指定的特定子帧时, 接收来自所述微基站的数据和来自宏基站的数据 两者。
3、 根据权利要求 2所述的通信方法, 其中, 来自所述微基站的数据和来自所述宏基 站的数据是相同的数据。
4、 根据权利要求 1 所述的通信方法, 其中, 所述方法还包括接收来自所述微基站的 激活信息的步骤, 所述判断步骤仅在所述激活信息指示有效值时才判断当前的子帧是否是 所述微基站所指定的特定子帧; 所述反馈步骤在所述激活信息指示无效值时, 根据所述微 基站所指定的反馈模式, 对当前子帧的信道情况进行反馈。
5、 根据权利要求 1 所述的通信方法, 其中, 所述微基站所指定的反馈模式包括所述 联合传输反馈模式、 协作调度 /协作波束成形反馈模式以及通常反馈模式。
6、 一种移动终端, 所述移动终端包括:
接收单元, 从微基站接收对特定子帧的指定和对反馈模式的指定;
判断单元, 判断当前的子帧是否是所述微基站所指定的特定子帧;
反馈单元, 当所述当前的子帧是所述微基站所指定的特定子帧时, 按照联合传输反 馈模式对当前子帧的信道情况进行测量和反馈, 当所述当前的子帧不是所述微基站所指定 的特定子帧时, 按照所述微基站所指定的反馈模式, 对当前子帧的信道情况进行测量和反 馈。
7、 根据权利要求 6所述的移动终端, 其中, 在所述微基站所指定的特定子帧, 所述 接收单元接收来自所述微基站的数据和来自宏基站的数据两者。
8、 根据权利要求 7所述的移动终端, 其中, 来自所述微基站的数据和来自所述宏基 站的数据是相同的数据。
9、 根据权利要求 6所述的移动终端, 其中, 所述接收单元还接收来自所述微基站的 激活信息, 所述判断单元仅在所述激活信息指示有效值时才判断当前的子帧是否是所述微 基站所指定的特定子帧; 所述反馈单元在所述激活信息指示无效值时, 根据所述微基站所 指定的反馈模式, 对当前子帧的信道情况进行反馈。
10、 根据权利要求 6所述的移动终端, 其中, 所述微基站所指定的反馈模式包括所述 联合传输反馈模式、 协作调度 /协作波束成形反馈模式以及通常反馈模式。
11、 一种在微基站中使用的方法, 所述方法包括:
第一接收步骤, 从宏基站接收有关于宏基站所配置的几乎空子帧的信息; 指定步骤, 指定反馈模式并根据有关于所述几乎空子帧的信息, 将所述微基站所使 用的与所述几乎空子帧对应的子帧指定为特定子帧;
发送步骤, 向移动终端发送有关于所述特定子帧和所述反馈模式的信息, 向所述宏 基站发送所述宏基站应在所述几乎空子帧发送给所述移动终端的数据以及所述数据在所 述几乎空子帧中的位置, 在所述特定子帧向所述移动终端发送数据;
第二接收步骤, 从移动终端接收信道反馈信息;
反馈处理步骤, 当所接收的信道反馈信息针对所述特定子帧时, 将所述信道反馈信 息按照所述信道反馈信息是联合传输反馈模式的信道反馈信息进行处理, 当所接收的信道 反馈信息未针对所述特定子帧时, 将所述信道反馈信息按照所述信道反馈信息是所指定的 反馈模式的信道反馈信息进行处理。
12、 根据权利要求 11所述的方法, 其中所述方法还包括以下步骤:
判断所述移动终端是否处于所述微基站服务的微小区的扩展区域;
当所述移动终端处于所述微基站服务的微小区的扩展区域时, 向所述移动终端发送指 示有效值的激活信息, 而当所述移动终端未处于所述微基站服务的微小区的扩展区域时, 向所述移动终端发送指示无效值的激活信息。
13、 一种微基站, 所述微基站包括:
接收单元, 从宏基站接收有关于宏基站所配置的几乎空子帧的信息, 从移动终端接 收信道反馈信息;
指定单元, 所述指定单元指定反馈模式并根据有关于所述几乎空子帧的信息, 将所 述微基站所使用的与所述几乎空子帧对应的子帧指定为特定子帧;
发送单元, 所述发送单元向移动终端发送有关于所述特定子帧和所述反馈模式的信 息并在所述特定子帧向所述移动终端发送数据, 向所述宏基站发送所述宏基站应在所述几 乎空子帧发送给所述移动终端的数据以及有关于所述数据在所述几乎空子帧中的位置的 信息;
反馈处理单元, 当所述接收单元所接收的信道反馈信息针对所述特定子帧时, 将所 述信道反馈信息按照所述信道反馈信息是联合传输反馈模式的信道反馈信息进行处理, 当 所述接收单元所接收的信道反馈信息未针对所述特定子帧时, 将所述信道反馈信息按照所 述信道反馈信息是所述指定单元所指定的反馈模式的信道反馈信息进行处理。
14、 根据权利要求 13所述的微基站, 其中所述微基站还包括:
判断单元, 判断所述移动终端是否处于所述微基站服务的微小区的扩展区域; 当所述移动终端处于所述微基站服务的微小区的扩展区域时, 所述发送单元向所述移 动终端发送指示有效值的激活信息, 而当所述移动终端未处于所述微基站服务的微小区的 扩展区域时, 所述发送单元向所述移动终端发送指示无效值的激活信息。
15、 一种宏基站, 所述宏基站包括
第一发送单元, 向微基站发送有关于几乎空子帧的信息;
接收单元, 从所述微基站接收数据以及有关于所述数据在所述几乎空子帧上的位置 的信息;
第二发送单元, 在所述几乎空子帧上按照所述接收单元所接收的所述位置信息所指 定的位置, 发送所述接收单元接收的数据。
16、 一种通信系统, 所述通信系统包括根据权利要求 6所述的移动终端、 权利要求 13所述的微基站和权利要求 15所述的宏基站。
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CN104168602A (zh) * 2013-05-17 2014-11-26 华为技术有限公司 一种反馈确认信息的方法和终端及基站
CN104168602B (zh) * 2013-05-17 2018-06-15 华为技术有限公司 一种反馈确认信息的方法和终端及基站
CN103368628A (zh) * 2013-07-18 2013-10-23 西安科技大学 一种td-lte系统中基于码本的双流波束赋形方法
CN103368628B (zh) * 2013-07-18 2017-05-03 西安科技大学 一种td‑lte系统中基于码本的双流波束赋形方法

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