WO2011150783A1 - 无线网络中的数据传输方法和装置 - Google Patents

无线网络中的数据传输方法和装置 Download PDF

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Publication number
WO2011150783A1
WO2011150783A1 PCT/CN2011/074837 CN2011074837W WO2011150783A1 WO 2011150783 A1 WO2011150783 A1 WO 2011150783A1 CN 2011074837 W CN2011074837 W CN 2011074837W WO 2011150783 A1 WO2011150783 A1 WO 2011150783A1
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WIPO (PCT)
Prior art keywords
access point
user terminal
data
data channel
information
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PCT/CN2011/074837
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English (en)
French (fr)
Inventor
白伟
郑娟
闫志宇
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华为技术有限公司
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Publication of WO2011150783A1 publication Critical patent/WO2011150783A1/zh
Priority to US13/689,156 priority Critical patent/US20130089051A1/en

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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
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • 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
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H04W52/244—Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission method and apparatus in a wireless network. Background technique
  • Heterogeneous network technology can support high data rate transmission coverage and provide good user coverage. Further evolution and enhancement system LTE-A (Long Term Evolution - Advanced, Advanced Long Term Evolution) in LTE (Long Term Evolution) system
  • LTE-A Long Term Evolution - Advanced, Advanced Long Term Evolution
  • the heterogeneous network defined in the 3GPP LTE-A standard refers to a network composed of different power nodes, including: a macro base station, a micro base station, a home base station, and a repeater.
  • the user terminal needs to correctly demodulate the control channel of the serving node first, and receive scheduling information of the data transmission from the serving node through the control channel.
  • the traffic information from the service node is then received using the scheduling information transmitted by the data.
  • the interference scenario in a heterogeneous network is different from that of a homogeneous network due to the introduction of a low-power service node.
  • the transmission power of a macro base station is generally 46 dBm
  • the transmission power of a micro base station is only 30 dBm.
  • the user terminal served by the micro base station may be interfered by the macro base station. Therefore, in order to ensure that the user terminals in the heterogeneous network can work normally, it is necessary to consider how to avoid interference between different power nodes.
  • Embodiments of the present invention provide a data transmission method and apparatus in a wireless network, so as to conveniently and effectively avoid interference between different access points in a wireless network system.
  • an embodiment of the present invention provides a data transmission method in a wireless network, including: sending, by a first access point, information transmitted by a data channel allocated by a user terminal to a second access Point,
  • an embodiment of the present invention provides a data transmission method in a wireless network, including: a second access point receives information transmitted by a first access point to a data channel allocated by a user terminal, where
  • an embodiment of the present invention provides a first access point in a wireless network, including: a resource allocation module, configured to allocate information of a data channel transmission to a user terminal; and a resource information sending module, configured to be used by the user
  • the information transmitted by the data channel allocated by the terminal is sent to the second access point, where the first access point does not transmit data on the data channel, or transmits power at a power less than or equal to the first power Other user terminals outside the user terminal transmit data.
  • an embodiment of the present invention provides a second access point in a wireless network, including: a resource information receiving module, configured to receive information transmitted by a first access point to a data channel allocated by a user terminal; a module, configured to use the data channel according to information transmitted by the data channel Transmitting data to the user terminal; wherein, the first access point does not transmit data on the data channel, or transmits to other user terminals except the user terminal with a transmit power less than or equal to the first power send data.
  • a data transmission method in a wireless network including: receiving, by a user terminal, information transmitted by a first access node to a data channel allocated by the user terminal;
  • the user terminal receives, according to the information transmitted by the data channel, the data that is sent by the second access point to the user terminal according to the information transmitted by the data channel, where the first access point is No data is transmitted on the data channel, or data is transmitted to other user terminals than the user terminal with a transmission power less than or equal to the first power.
  • a user terminal including:
  • a resource information receiving module configured to receive information that is transmitted by the first access point to the data channel allocated by the user terminal;
  • a data receiving module configured to receive, according to information transmitted by the data channel, data sent by the second access point to the user terminal according to the information transmitted by the data channel, where the first The access point does not transmit data on the data channel, or transmits data to other user terminals than the user terminal with a transmission power less than or equal to the first power.
  • the embodiment of the present invention sends the information transmitted by the second access point to the user terminal according to the information transmitted by the data channel allocated by the first access point to the user terminal.
  • FIG. 1 is a schematic diagram of a processing flow of a data transmission method in a wireless network according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a first access point in a wireless network according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a second access point in a wireless network according to an embodiment of the present invention
  • the first access point in the wireless network sends the information transmitted by the data channel allocated by the user terminal to the second access point, where the first access point does not transmit on the data channel. data.
  • the second access point sends data to the user terminal by using the data channel according to the information transmitted by the data channel allocated to the user terminal.
  • the foregoing wireless network may be a heterogeneous network or a homogeneous network.
  • the first access point may be a macro base station, a micro base station, a home base station, a relay station, and the like
  • the second access point may be a macro base station, a micro base station, a home base station, a relay station, and the like.
  • the foregoing user terminal may be an LTE user equipment or an LTE-A user equipment or a relay node or a device having receiving capability in a future wireless system.
  • a schematic flowchart of a data transmission method in a wireless network includes the following processing steps: Step 102: A service macro base station sends information about a data channel transmission allocated by a user terminal.
  • the serving macro base station sends the information transmitted by the serving macro base station to the data channel allocated by the user terminal to the serving micro base station by using an interface between the serving macro base station and the serving micro base station, and the interface may The interface includes a delay that is less than the first threshold, and the first threshold is no more than one second.
  • the serving macro base station may send information such as a PCID (Physical Channel Identifier) of the serving macro base station and a subframe number of the data transmission to the serving micro base station by using an interface between the serving macro base station and the serving micro base station.
  • PCID Physical Channel Identifier
  • the interface between the service macro base station and the serving micro base station may be an X2 interface, or may be a MAC layer interface for transmitting MAC (Mdium Access Control, Medium Access Control Layer) information, or may be an S1 interface, or may be Other types of interfaces that propagate delays less than 1 second.
  • the interface between the service macro base station and the serving micro base station may be a MAC layer interface.
  • the serving micro base station ensures the serving micro base station to the LTE user of the serving cell in order to receive the radio interface signal from the serving macro base station.
  • the subframe in which the user terminal of the cell is required to receive the radio interface signal of the serving macro base station is an MBSFN (MBMS over a Single Frequency Network) subframe.
  • the serving macro base station transmits, to the user terminal, the information transmitted by the data channel allocated to the user terminal by using a control channel between the user base station and the user terminal, where the control channel may be a physical layer downlink control channel PDCCH in the LTE system;
  • the information transmitted by the allocated data channel may include: a radio resource occupied by the data channel and one or a combination of the following parameters: a transmission mode, a modulation and coding mode, power allocation information, and hybrid automatic repeat request HARQ information.
  • the serving macro base station may also transmit other common channel information for data transmission control to the user terminal, including but not limited to information such as a primary synchronization channel, a secondary synchronization channel, a physical layer broadcast channel, and the like.
  • the service macro base station does not send service data, control data, and the like to the user terminal on the data channel allocated to the user terminal, but may send a first reference signal, which may be used for channel measurement estimation, in LTE or For example, in the LTE-A system, the first reference signal may be a CRS.
  • the user terminal may detect, according to the first reference signal received from the serving macro base station, information about the data channel transmission allocated by the serving macro base station to the user terminal by using the control channel between the serving macro base station and the user terminal, and Other common channel information for data transmission control.
  • Step 103 The serving micro base station sends data to the user terminal by using the data channel according to the information transmitted by the data channel, where the serving macro base station does not transmit data on the data channel; or the service macro base
  • the station transmits data to other user terminals than the user terminal with a transmission power less than or equal to the first power.
  • the first power may be set as follows.
  • the user terminal uses the data channel to the serving micro base station to the
  • the BLER Block Error Rate of data demodulation
  • the BLER Block Error Rate of data demodulation
  • the serving micro base station that forms an "access point set" with the serving macro base station may use the information transmitted by the data channel allocated to the user terminal received from the serving macro base station to serve the identity of the macro base station (ie, utilize Serving the macro base station's PCID), this can be done in the LTE-A system Guarantee backward compatibility with the LTE user terminal, or send the service data, control data, etc. to the user terminal on the data channel allocated by the serving macro base station to the user terminal in its own identity (ie, using the PCID of the serving micro base station) data.
  • the serving micro base station that forms an "access point set" with the serving macro base station may use the information transmitted by the data channel allocated to the user terminal received from the serving macro base station to serve the identity of the macro base station (ie, utilize Serving the macro base station's PCID), this can be done in the LTE-A system Guarantee backward compatibility with the LTE user terminal, or send the service data, control data, etc. to the user terminal on the data channel allocated by the serving macro base station to
  • the serving micro base station may further send a second reference signal to the user terminal, where the second reference signal may be used for data demodulation, where the LTE or LTE-A system is used as an example, and the second reference signal may be a DRS. (Dedicated Reference Signal (UE-specific Reference Signal) and/or DMRS (De-modulation Reference Signal).
  • the user terminal can receive the second reference signal from the serving micro base station, from the service.
  • the data channel between the micro base station and the user terminal detects data such as service data and control data sent by the serving micro base station to the user.
  • the serving macro base station may not consider the serving micro base station when allocating the radio resources of the data channel to the user terminal.
  • the radio resource of the data channel allocated by the serving macro base station to the user terminal may overlap with the CRS of the serving micro base station.
  • a service micro base station is required. At the CRS resource location of the serving macro base station and the CRS resource location of the serving micro base station Data cannot be transmitted.
  • the service micro-base station performs physical resource mapping, the data on the CRS resource location permitted by the PDSCH mapping rule should be punctured, that is, the data is masked.
  • the service micro-base station can be formulated.
  • a new physical resource mapping rule is used to avoid the overlap between the resource of the data channel allocated by the service macro base station to the user terminal and the CRS of the serving micro base station.
  • the user terminal receives the service data, control data, etc. sent by the service micro base station to itself. After the data, it is necessary to detect whether the received data is correct. If it is correct, it needs to send an ACK (ACKnowledge) signal to the serving macro base station; otherwise, send a NACK (Not Acknowledge) signal to the serving macro base station, When the serving macro base station receives the NACK signal, the serving micro base station may be notified to retransmit the data to the user terminal.
  • ACK acknowledge
  • NACK Not Acknowledge
  • the user terminal may send the foregoing ACK/NACK signal to the serving micro base station, and the serving micro base station forwards the ACK/NACK signal to the serving macro base station, and when the serving macro base station receives the NACK signal, may notify the service micro The base station retransmits the data to the user terminal.
  • step 101 may be further included:
  • Step 100 The user terminal determines a serving macro base station of the user terminal. Specifically, the user terminal may select a macro base station with the strongest signal strength as the serving macro base station according to the received strength of the downlink signal of each macro base station, and start the wireless connection. The incoming process communicates with the selected serving macro base station.
  • Step 101 The serving macro base station allocates information of the data channel transmission to the user terminal.
  • the information transmitted by the data channel allocated to the user terminal may be: a radio resource occupied by the data channel and one or a combination of the following parameters: a transmission mode, a modulation and coding mode, power allocation information, and hybrid automatic repeat request HARQ information.
  • the radio resources occupied by the above data channels mainly include information such as frequency resources and/or time resources and/or other radio resources.
  • the data channel may be a physical layer downlink shared channel PDSCH in the LTE system.
  • the serving macro base station may be configured according to a channel quality parameter between the serving macro base station and the user terminal reported by the user terminal, and/or a channel quality parameter between the serving micro base station and the user terminal, The information about the data channel transmission is allocated to the user terminal.
  • the allocation process may refer to the following steps:
  • the user terminal according to the first reference signal sent by the serving macro base station for example, CRS (Cell) a specific reference signal (cell reference signal), performing detection, and reporting a channel quality parameter between the serving macro base station and the user terminal to the serving macro base station, where the channel quality parameter may be: CQI (Channel Quality Indicator) , Rl ( Rank Indicator, Rank Indicator), PMI (Pre-coding Matrix Indicator), and RSRP One or a combination of parameters such as (Reference Signal Received Power).
  • CQI Channel Quality Indicator
  • Rl Rank Indicator, Rank Indicator
  • PMI Pre-coding Matrix Indicator
  • RSRP Reference Signal Received Power
  • the user terminal may further report, to the serving macro base station, a channel quality parameter between the user terminal and the serving micro base station, such as RSRP; for some user terminals having neighboring cell CRS detection capabilities, such as an LTE-A user equipment, It is also possible to detect the CRS of the serving micro base station, and report other channel quality parameters, such as CQI, R1, PMI, etc., other than the RSRP, and feed back one or a combination of the channel quality parameters to the serving macro base station. Taking the information transmitted by the data channel allocated to the user terminal as a transmission mode, the serving macro base station may according to the information fed back by the user terminal, that is, the channel quality parameter between the user terminal and the serving macro base station, and/or the user terminal and the service micro.
  • the channel quality parameter between the base stations is used to set a transmission mode to be used for data transmission by the user terminal, and the transmission mode includes but is not limited to a data transmission mode supported by the user terminal.
  • the information transmitted by the data channel allocated to the user terminal is a modulation and coding mode.
  • the serving macro base station may according to the RSRP of the serving micro base station fed back by the user terminal. Set the modulation and coding mode for the user terminal.
  • the serving macro base station can be based on the user terminal.
  • the channel state information between the serving micro base station and the user terminal is fed back, and the modulation and coding mode is set to the user terminal. Because the user terminal can obtain the information transmitted by the data channel allocated to the user terminal from the serving macro base station, the serving micro base station may not receive the information transmitted by the service macro terminal to the data channel allocated by the user terminal after receiving the information transmitted by the serving macro base station. The information is sent to the user terminal to avoid mutual interference between the serving macro base station and the control channel of the serving micro base station, and the user terminal can reliably receive the information transmitted by the data channel allocated by the user terminal.
  • the serving macro base station may further select a serving micro base station for the user terminal; After receiving the downlink signal of the micro base station, the user terminal reports the micro base station to the serving macro base station.
  • the user terminal may receive downlink signals of multiple micro base stations, and report RSRP of multiple micro base stations to the service macro base station.
  • the serving macro base station selects a serving micro base station for the user according to the RSRP of the plurality of micro base stations reported by the user terminal, and the criterion for selecting the serving micro base station may be based on criteria such as the strength of the received power.
  • the serving macro base station of the user terminal and the serving macro base station selected by the serving macro base station for the user terminal constitute a set of access points served by the user terminal.
  • the serving macro base station sends the control channel information to the user terminal without transmitting data
  • the serving micro base station sends the data to the user terminal without transmitting the control channel information, which can effectively avoid the service macro base station and the serving micro base station in the heterogeneous network scenario. Channel interference between them improves data transmission performance.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
  • the first access point in a wireless network is also provided in the embodiment of the present invention.
  • the structure of the first access point is as shown in FIG. 2, and includes the following modules: a resource allocation module 21, configured to allocate data to the user terminal.
  • the information transmitted by the data channel allocated to the user terminal may be: a radio resource occupied by the data channel and one or a combination of the following parameters: transmission mode, modulation and coding mode, power allocation information, and hybrid automatic repeat request HARQ information.
  • the radio resources occupied by the above data channels mainly include information such as frequency resources and/or time resources and/or other radio resources.
  • the data channel may be a physical layer downlink shared channel in an LTE system. PDSCH.
  • the resource allocation module 21 may be configured according to a channel quality parameter between the first access point and the user terminal reported by the user terminal, and/or the second access point and the user terminal.
  • the channel quality parameter between the user terminals is assigned information for data channel transmission.
  • the channel quality parameter may be: CQI (Channel Quality Indicator), R1 (Lead Indicator, Rank Indicator), PMI (Pre-coding Matrix Indicator), and RSRP (Reference Signal Received Power, One or a combination of parameters such as reference signal reception power).
  • the resource information sending module 22 is configured to send the information about the data channel allocated to the user terminal to the second access point.
  • the resource information sending module 22 passes the first access point and the second An interface between the access points, where the information about the data channel allocated by the user terminal is sent to the second access point; the interface between the first access point and the second access point
  • the method includes: an interface whose delay is less than the first threshold, and the first threshold is not more than 1 second.
  • the first access point does not transmit data on the data channel, or transmits data to other user terminals except the user terminal with a transmission power less than or equal to the first power.
  • the first power may be set as follows.
  • the user terminal uses the data channel to the serving micro base station to the
  • the BLER Block Error Rate of data demodulation
  • the BLER Block Error Rate of data demodulation
  • the first access point may further include:
  • a second access point selection module configured to select the second access point for the user terminal.
  • a reference information sending module configured to send, by using the data channel, a first reference signal to the user terminal
  • the information sending module of the data channel transmission is further configured to pass the first access point and the user
  • the control channel between the terminals transmits information transmitted by the data channel allocated by the user terminal to the user terminal, so that the user terminal receives the second access point to use the data channel according to the information transmitted by the data channel.
  • the first access point may be a serving macro base station of the user terminal.
  • the second access point sends data to the user terminal according to the information transmitted by the data channel allocated by the first access point to the user terminal, and the first access point does not on the allocated data channel. Sending data to the user terminal can effectively avoid interference between the second access point and the first access point in the heterogeneous network scenario, and improve transmission performance.
  • the second access point in the wireless network is also provided in the embodiment of the present invention.
  • the structure of the second access point is as shown in FIG. 3, and includes the following module: a resource information receiving module 31, configured to receive the first interface. Information transmitted by the data channel allocated to the user terminal;
  • the data sending module 32 is configured to send data to the user terminal by using the data channel according to the information transmitted by the data channel, where the first access point does not transmit data on the data channel, or The transmission power less than or equal to the first power transmits data to other user terminals than the user terminal.
  • the first power may be set as follows.
  • the serving macro base station transmits data with a transmit power less than or equal to the first power
  • the user terminal uses the data channel to the serving micro base station to the The BLER (Block Error Rate of data demodulation) of the data transmitted by the user terminal may be no more than 10%.
  • the data sending module 32 is specifically configured to use, by the first access point, the information about the data channel allocated to the user terminal, to the first access point or the second access point. The identity is used to transmit data to the user terminal using the data channel.
  • the second access point may be a serving micro base station of the user terminal.
  • a user terminal is also provided in the embodiment of the present invention.
  • the structure of the user terminal is as shown in FIG. 4, and includes the following modules:
  • the resource information receiving module 41 is configured to receive information about a data channel transmission allocated by the first access point to the user terminal;
  • the data receiving module 42 is configured to receive, according to the information transmitted by the data channel, data sent by the second access point to the user terminal by using the data channel according to information transmitted by the data channel;
  • the first access point does not transmit data on the data channel, or transmits data to other user terminals except the user terminal with a transmit power less than or equal to the first power.
  • the embodiment of the present invention provides a new wireless network data transmission scheme, in which the information transmitted by the service macro channel is transmitted to the user terminal by the serving macro base station, and the data is not transmitted on the corresponding data channel.
  • the micro base station sends data to the user terminal on the data channel corresponding to the information transmitted by the serving macro terminal to the data channel allocated by the user terminal; the solution can effectively avoid interference between control channels of different access points in the wireless network system, thereby ensuring The user terminal can reliably receive the control channel of the serving node, thereby ensuring effective data communication between the user terminal and the serving node.
  • the user terminal can fully utilize the control signal quality of the macro base station, improve the reliability of the control channel reception, and fully utilize the resources of the micro cell for data transmission.
  • the data transmission mode provided by the embodiment of the present invention is also transparent to the user terminal (ie, the LTE terminal user) that does not have the cooperative receiving capability, that is, the backward compatibility with the LTE user equipment can be guaranteed.

Description

无线网络中的数据传输方法和装置
技术领域
本发明涉及通信技术领域， 尤其涉及一种无线网络中的数据传输方法和 装置。 背景技术
异构网络技术由于能够支持高数据速率传输的覆盖、 提供良好的用户覆 盖， 在 LTE ( Long Term Evolution , 长期演进） 系统的进一步演进和增强系 统 LTE-A ( Long Term Evolution - Advanced, 高级长期演进） 系统中得到 广泛的应用。在 3GPP LTE-A标准中定义的异构网络是指由不同的功率节点构 成的网络， 这些功率节点包括： 宏基站， 微基站， 家庭基站和中继器等。
在异构网络中， 用户终端需要先正确地解调服务节点的控制信道， 通过 控制信道接收来自于服务节点的数据传输的调度信息。 然后， 利用该数据传 输的调度信息接收来自于服务节点的业务数据。
在异构网络中， 由于低功率服务节点的引入， 导致异构网络中的干扰场 景与同构网络不同， 例如一般来讲， 宏基站的发送功率为 46dBm， 而微基站 的发送功率只有 30dBm， 显然， 由于宏基站与微基站的发送功率相差较大， 微基站服务的用户终端会受到宏基站的干扰。 因此， 为了保证异构网络下的 用户终端可以正常工作， 需要考虑如何规避不同功率节点之间的干扰。 发明内容 本发明的实施例提供了一种无线网络中的数据传输方法和装置， 以实现 方便、 有效地规避无线网络系统下不同接入点之间的干扰。
一方面， 本发明实施例提供了一种无线网络中的数据传输方法， 包括： 第一接入点将给用户终端分配的数据信道传输的信息发送给第二接入 点，
以使得所述第二接入点根据所述数据信道传输的信息， 利用所述数据信 道向所述用户终端发送数据； 其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于 第一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。 一方面， 本发明实施例提供了一种无线网络中的数据传输方法， 包括： 第二接入点接收第一接入点给用户终端分配的数据信道传输的信息， 其 中；
所述第二接入点根据所述数据信道传输的信息， 利用所述数据信道向所 述用户终端发送数据； 其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于 第一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。 另一方面， 本发明实施例提供了一种无线网络中的第一接入点， 包括： 资源分配模块， 用于给用户终端分配数据信道传输的信息； 资源信息发送模块， 用于将给用户终端分配的数据信道传输的信息发送 给第二接入点； 其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于 第一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。 另一方面， 本发明实施例提供了一种无线网络中的第二接入点， 包括： 资源信息接收模块， 用于接收第一接入点给用户终端分配的数据信道传 输的信息； 数据发送模块， 用于根据所述数据信道传输的信息， 利用所述数据信道 向所述用户终端发送数据； 其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于 第一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。 另一方面， 本发明实施例提供了一种无线网络中的数据传输方法， 包括： 用户终端接收第一接入节点给所述用户终端分配的数据信道传输的信 息；
用户终端根据所述数据信道传输的信息， 接收第二接入点根据所述数据 信道传输的信息， 利用所述数据信道向所述用户终端发送的数据； 其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于 第一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。 另一方面， 本发明实施例提供了一种用户终端， 包括：
资源信息接收模块， 用于接收第一接入点给用户终端分配的数据信道传 输的信息；
数据接收模块， 用于根据所述数据信道传输的信息， 接收第二接入点根 据所述数据信道传输的信息， 利用所述数据信道向所述用户终端发送的数据； 其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于 第一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。 由上述本发明的实施例提供的技术方案可以看出， 本发明实施例通过第 二接入点根据第一接入点发送的给用户终端分配的数据信道传输的信息， 向 所述用户终端发送数据， 同时第一接入点在分配的数据信道上不向所述用户 终端发送数据， 或以小于或等于第一功率的发射功率， 向除所述用户终端外 的其它用户终端发送数据， 能够有效规避异构网络场景下第二接入点和第一 接入点之间的干扰， 提高传输性能。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例描述中所 需要使用的附图作简单地介绍， 显而易见地， 下面描述中的附图仅仅是本发 明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳动性的 前提下， 还可以根据这些附图获得其他的附图。
图 1为本发明实施例提供的一种无线网络中的数据传输方法的处理流程 示意图；
图 2为本发明实施例提供的一种无线网络中的第一接入点的结构示意图； 图 3为本发明实施例提供的一种无线网络中的第二接入点的结构示意图； 图 4为本发明实施例提供的一种用户终端的结构示意图。 具体实施方式
在本发明实施例中， 无线网络中的第一接入点将给用户终端分配的数据 信道传输的信息发送给第二接入点， 所述第一接入点在所述数据信道上不传 输数据。
所述第二接入点根据所述给用户终端分配的数据信道传输的信息， 利用 所述数据信道向所述用户终端发送数据。
在实际应用中， 上述无线网络可以为异构网络或同构网络等。 在实际应用中， 上述第一接入点可以为宏基站、 微基站、 家庭基站、 中 继站等设备， 上述第二接入点可以为宏基站、 微基站、 家庭基站、 中继站等 设备。 在实际应用中， 上述用户终端可以为 LTE用户设备或 LTE-A用户设备或 中继节点或在未来无线系统中具有接收能力的设备。
以下描述中将以无线网络中的一种网络技术即异构网络技术来说明本发 明实施例， 但同样适用于其他的无线网络系统。 下面以上述第一接入点为服务宏基站， 上述第二接入点为服务微基站为 例来说明本发明实施例。 为便于对本发明实施例的理解， 下面将结合附图以及具体实施例做进一 步的解释说明， 且各个实施例并不构成对本发明实施例的限定。 如图 1 所示， 为本发明实施例提供的一种无线网络中的数据传输方法的 处理流程示意图， 包括如下处理步骤： 步骤 102、 服务宏基站将给用户终端分配的数据信道传输的信息发送给 服务微基站； 具体的， 服务宏基站通过服务宏基站与服务微基站之间的某种接口， 将 服务宏基站给用户终端分配的数据信道传输的信息发送给上述服务微基站， 该接口可以包括时延小于第一阔值的接口， 所述第一阔值不大于 1秒。 服务宏基站通过服务宏基站与服务微基站之间的某种接口， 还可以将服 务宏基站的 PCID ( Physical Channel Identifier, 物理信道标识）、 数据传输 的子帧号等信息发送给上述服务微基站。 上述服务宏基站与服务微基站之间的接口可以是 X2接口，也可以是用于 传递 MAC ( Mdium Access Control , 媒质接入控制层）信息的 MAC层接口， 也可以是 S1接口，也可以是传播时延小于 1秒的其他类型的接口。 当服务宏 基站与服务微基站均以有线方式接入核心网时， 上述服务宏基站与服务微基 站之间的接口可以为 MAC层接口。 特别地， 对于 LTE 系统， 当服务宏基站 与服务微基站之间的接口采用无线接口时， 服务微基站为了接收来自服务宏 基站的无线接口信号， 同时保证服务微基站对本服务小区的 LTE用户的后向 兼容性， 需要通知本小区的用户终端当前用于接收服务宏基站无线接口信号 的子帧是一个 MBSFN ( MBMS over a Single Frequency Network,单频网方 式承载 MBMS业务）子帧。 服务宏基站通过和用户终端之间的控制信道将给用户终端分配的数据信 道传输的信息发送给用户终端， 该控制信道在 LTE系统中， 可以为物理层下 行控制信道 PDCCH; 所述给用户终端分配的数据信道传输的信息可以包括： 数据信道占用的无线资源以及下列参数之一或组合： 发射模式、 调制编码方 式、 功率分配信息及混合自动重传请求 HARQ信息。 服务宏基站还可以向用户终端发送用于数据传输控制的其他公共信道信 息， 该公共信道信息包括但不限于主同步信道， 辅同步信道， 物理层广播信 道等信息。 服务宏基站在给用户终端分配的上述数据信道上， 不向用户终端发送业 务数据、 控制数据等数据， 但可以发送第一参考信号， 该第一参考信号可以 用于信道测量估计，以 LTE或 LTE-A系统为例，该第一参考信号可以为 CRS。 用户终端可以根据从服务宏基站接收到的第一参考信号， 检测出服务宏基站 通过和用户终端之间的控制信道发送给所述用户终端的上述给用户终端分配 的数据信道传输的信息及用于数据传输控制的其他公共信道信息。 步骤 103、 服务微基站根据所述数据信道传输的信息， 利用所述数据信 道向所述用户终端发送数据， 其中， 所述服务宏基站在所述数据信道上不传 输数据； 或所述服务宏基站以小于或等于第一功率的发射功率， 向除所述用 户终端外的其它用户终端发送数据。 其中， 所述第一功率的可以如下设置， 当所述服务宏基站以小于或等于 第一功率的发射功率发射数据时， 所述用户终端对所述服务微基站利用所述 数据信道向所述用户终端发送的数据的 BLER ( Block Error Rate, 数据解调 的误块率） 可以不高于 10%。
具体的， 与服务宏基站构成 "接入点集合" 的上述服务微基站， 可以利 用从服务宏基站接收到的上述给用户终端分配的数据信道传输的信息， 以服 务宏基站的身份（即利用服务宏基站的 PCID )， 这样做可以在 LTE-A系统中 保证对 LTE用户终端的后向兼容性， 或者以自己的的身份（即利用服务微基 站自己的 PCID )， 在服务宏基站给用户终端分配的数据信道上向用户终端发 送业务数据、 控制数据等数据。 其中 可选的， 上述服务微基站还可以向用户终端发送第二参考信号， 该第二 参考信号可以用于数据解调， 以 LTE或 LTE-A系统为例， 该第二参考信号可 以为 DRS ( Dedicated Reference Signal (UE-specific Reference Signal , 专用参考信号）和 /或 DMRS (解调参考信号， De-modulation Reference Signal )。 用户终端可以根据从服务微基站接收到的第二参考信号， 从服务微基站 和用户终端之间的数据信道中检测出服务微基站发给自己的业务数据、 控制 数据等数据。 服务宏基站在给用户终端分配数据信道的无线资源时， 可能不会考虑服 务微基站本身 CRS的位置， 因此， 服务宏基站给用户终端分配的数据信道的 无线资源有可能与服务微基站的 CRS相重叠， 为了解决这个沖突， 对于普通 用户终端，例如 LTE用户设备，需要服务微基站在服务宏基站的 CRS资源位 置上和服务微基站的 CRS资源位置上均不能发送数据，服务微基站进行物理 资源映射时， 应该把 PDSCH映射规则许可的 CRS资源位置上的数据打孔， 即将数据屏蔽掉； 对于高级用户终端， 例如 LTE-A用户， 服务微基站可以制 定新的物理资源映射规则， 来规避服务宏基站给用户终端分配的数据信道的 资源与服务微基站的 CRS之间的重叠问题。 用户终端接收到服务微基站发给自己的业务数据、 控制数据等数据后， 需要检测所接收到的数据是否正确，如果正确，则需要向服务宏基站发送 ACK ( ACKnowledge, 确认应答）信号； 否则， 向服务宏基站发送 NACK ( Not Acknowledge, 非确认应答）信号， 当服务宏基站接收到 NACK信号时， 可 以通知服务微基站向用户终端重传数据。 可选的， 用户终端可以将上述 ACK/NACK信号发送给服务微基站， 服务 微基站将上述 ACK/NACK信号转发给所述服务宏基站， 当服务宏基站接收到 NACK信号时， 可以通知服务微基站向用户终端重传数据。 可选的， 在步骤 102之前， 还可以包括步骤 100、 步骤 101 :
步骤 100、 用户终端确定所述用户终端的服务宏基站； 具体的， 用户终端可以根据接收到的各个宏基站的下行信号的强度， 选 择信号强度最强的宏基站作为服务宏基站， 启动无线接入过程， 与所述选择 的服务宏基站进行通信。
步骤 101、 服务宏基站给用户终端分配数据信道传输的信息。 上述给用户终端分配的数据信道传输的信息可以为： 数据信道占用的无 线资源以及下列参数之一或组合： 发射模式、 调制编码方式、 功率分配信息 及混合自动重传请求 HARQ信息。 上述数据信道占用的无线资源主要包括频率资源和 /或时间资源和 /或其 他无线资源等信息。 该数据信道在 LTE系统中， 可以为物理层下行共享信道 PDSCH。 具体的， 所述服务宏基站可以根据用户终端报告的所述服务宏基站与所 述用户终端之间的信道质量参数和 /或所述服务微基站与所述用户终端之间的 信道质量参数， 给所述用户终端分配数据信道传输的信息， 以 LTE或 LTE-A 系统为例， 分配过程可以参照如下步骤： 用户终端根据对服务宏基站的发送的所述第一参考信号， 例如 CRS ( Cell-specific Reference Signal , 小区公共参考信号）， 进行检测， 并向服务 宏基站报告服务宏基站与用户终端之间的信道质量参数， 该信道质量参数可 以为： CQI ( Channel Quality Indicator,信道质量指示）、 Rl ( Rank Indicator, 秩指示）、 PMI ( Pre-coding Matrix Indicator, 预编码矩阵指示）及 RSRP ( Reference Signal Received Power, 参考信号接收功率）等参数之一或组 合。 用户终端还可以向所述服务宏基站报告所述用户终端与服务微基站之间 的信道质量参数， 如 RSRP; 对于某些具有相邻小区 CRS检测能力的用户终 端， 例如 LTE-A用户设备， 还可以根据对服务微基站的 CRS进行检测， 并上 报除 RSRP以外的其它信道质量参数， 如 CQI、 Rl、 PMI等， 并向服务宏基 站反馈上述信道质量参数之一或组合。 以给用户终端分配的数据信道传输的信息为发射模式为例， 服务宏基站 可以根据用户终端反馈的信息， 即用户终端与服务宏基站之间的信道质量参 数， 和 /或用户终端与服务微基站之间的信道质量参数， 为用户终端设置数据 传输所要采用的发射模式， 该发射模式包括但不限于用户终端支持的数据发 送模式。
以给用户终端分配的数据信道传输的信息为调制编码方式为例， 对于没 有相邻小区 CRS检测功能的用户终端，如 LTE用户设备，服务宏基站可以根 据用户终端反馈的服务微基站的 RSRP， 为用户终端设置调制编码方式。 对 于有相邻小区 CRS检测功能的用户终端，例如 LTE-A用户设备， 由于可以反 馈用户终端与服务微基站之间的信道状态信息， 如 CQI、 Rl、 PMI等， 服务 宏基站可以根据用户终端反馈的服务微基站与用户终端之间的上述信道状态 信息， 给用户终端设置调制编码方式。 由于上述步骤中， 用户终端可以从服务宏基站获取给用户终端分配的数 据信道传输的信息， 因此服务微基站在接收到服务宏基站发送的给用户终端 分配的数据信道传输的信息后， 可以不将该信息发送给所述用户终端， 以避 免服务宏基站与服务微基站的控制信道之间的相互干扰， 保证用户终端能够 可靠的接收给用户终端分配的数据信道传输的信息。 可选的， 在步骤 102之前， 步骤 100之后， 服务宏基站还可以为所述用 户终端选择服务微基站； 用户终端接收到微基站的下行信号后， 即向服务宏基站报告微基站的
RSRP。 在实际应用中， 用户终端可能接收到多个微基站的下行信号， 并向服 务宏基站报告多个微基站的 RSRP。 服务宏基站根据用户终端报告的多个微基站的 RSRP， 为该用户选择一 个服务微基站， 选择服务微基站的准则可以基于接收功率的强度等准则。 上述用户终端的服务宏基站和服务宏基站为用户终端选择的服务微基站 构成为该用户终端服务的接入点集合。 该实施例通过由服务宏基站给用户终端发送控制信道信息同时不发送数 据， 服务微基站给用户终端发送数据同时不发送控制信道信息， 能够有效规 避异构网络场景下服务宏基站和服务微基站之间的信道干扰， 提高数据传输 性能。 本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流 程， 是可以通过计算机程序来指令相关的硬件来完成， 所述的程序可存储于 一计算机可读取存储介质中， 该程序在执行时， 可包括如上述各方法的实施 例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体（ Read-〇nly Memory, ROM )或随机存储记忆体（ Random Access Memory, RAM )等。
对应上述方法实施例， 本发明实施例还提供的一种无线网络中的第一接 入点， 其结构示意图如图 2所示， 包括如下模块： 资源分配模块 21， 用于给用户终端分配数据信道传输的信息； 上述给用户终端分配的数据信道传输的信息可以为： 数据信道占用的无 线资源以及下列参数之一或组合： 发射模式、 调制编码方式、 功率分配信息 及混合自动重传请求 HARQ信息。 上述数据信道占用的无线资源主要包括频率资源和 /或时间资源和 /或其 他无线资源等信息。 该数据信道在 LTE系统中， 可以为物理层下行共享信道 PDSCH。 具体的，所述资源分配模块 21可以根据所述用户终端报告的所述第一接 入点与所述用户终端之间的信道质量参数和 /或所述第二接入点与所述用户终 端之间的信道质量参数， 给所述用户终端分配数据信道传输的信息。 该信道质量参数可以为： CQI ( Channel Quality Indicator, 信道质量指 示）、 Rl ( Rank Indicator, 秩指示 ), PMI ( Pre-coding Matrix Indicator, 预 编码头巨阵指示 )及 RSRP ( Reference Signal Received Power, 参考信号接 收功率）等参数之一或组合。 资源信息发送模块 22， 用于将给用户终端分配的数据信道传输的信息发 送给第二接入点； 具体的，所述资源信息发送模块 22通过所述第一接入点与所述第二接入 点之间的接口， 将所述给用户终端分配的数据信道传输的信息发送给所述第 二接入点； 所述第一接入点与所述第二接入点之间的接口包括： 时延小于第 一阔值的接口， 所述第一阔值不大于 1秒。 其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于 第一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。 其中， 所述第一功率的可以如下设置， 当所述服务宏基站以小于或等于 第一功率的发射功率发射数据时， 所述用户终端对所述服务微基站利用所述 数据信道向所述用户终端发送的数据的 BLER ( Block Error Rate, 数据解调 的误块率） 可以不高于 10%。
所述第一接入点还可以包括：
第二接入点选择模块， 用于为所述用户终端选择所述第二接入点。
参考信息发送模块， 用于利用所述数据信道向用户终端发送第一参考信 号；
所述数据信道传输的信息发送模块， 还用于通过所述第一接入点和用户 终端之间的控制信道将给用户终端分配的数据信道传输的信息发送给用户终 端， 以使所述用户终端根据所述数据信道传输的信息， 接收所述第二接入点 利用所述数据信道向所述用户终端发送的数据。 上述第一接入点可以是用户终端的服务宏基站。 本发明实施例通过第二接入点根据第一接入点发送的给用户终端分配的 数据信道传输的信息， 向所述用户终端发送数据， 同时第一接入点在分配的 数据信道上不向所述用户终端发送数据， 能够有效规避异构网络场景下第二 接入点和第一接入点之间的干扰， 提高传输性能。
对应上述方法实施例， 本发明实施例还提供的一种无线网络中的第二接 入点， 其结构示意图如图 3所示， 包括如下模块： 资源信息接收模块 31， 用于接收第一接入点给用户终端分配的数据信道 传输的信息；
数据发送模块 32， 用于根据所述数据信道传输的信息， 利用所述数据信 道向所述用户终端发送数据； 其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于 第一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。
其中， 所述第一功率的可以如下设置， 当所述服务宏基站以小于或等于 第一功率的发射功率发射数据时， 所述用户终端对所述服务微基站利用所述 数据信道向所述用户终端发送的数据的 BLER ( Block Error Rate, 数据解调 的误块率） 可以不高于 10%。 所述数据发送模块 32， 具体用于从所述第一接入点接收到的所述给用户 终端分配的数据信道传输的信息， 以所述第一接入点或所述第二接入点的身 份， 利用所述数据信道向所述用户终端发送数据。
上述第二接入点可以为用户终端的服务微基站。 对应上述方法实施例， 本发明实施例还提供的一种用户终端， 其结构示 意图如图 4所示， 包括如下模块：
资源信息接收模块 41， 用于接收第一接入点给用户终端分配的数据信道 传输的信息；
数据接收模块 42， 用于根据所述数据信道传输的信息， 接收第二接入点 根据所述数据信道传输的信息， 利用所述数据信道向所述用户终端发送的数 据；
其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于 第一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。
综上所述， 本发明实施例提出了一种新的无线网络数据传输方案， 通过 由服务宏基站给用户终端发送分配的数据信道传输的信息， 同时在对应的数 据信道上不发送数据， 服务微基站在服务宏基站给用户终端分配的数据信道 传输的信息对应的数据信道上向用户终端发送数据； 该方案能够有效地规避 无线网络系统下不同接入点控制信道之间的干扰， 从而保证用户终端能够可 靠地接收服务节点的控制信道， 进而保证用户终端和服务节点之间有效的数 据通信。 在本发明实施例中， 用户终端可以充分地利用宏基站的控制信号质量， 提高控制信道接收的可靠性， 并且可以充分地利用微小区的资源进行数据传 输。 对于 LTE及 LTE-A系统， 本发明实施例提供的数据传输模式对不具有协 作接收能力的用户终端 （即 LTE终端用户）也是透明的， 即能够保证对 LTE 用户设备的后向兼容性。
以上所述， 仅为本发明较佳的具体实施方式， 但本发明的保护范围并不 局限于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可 轻易想到的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明 的保护范围应该以权利要求的保护范围为准 <

Claims

权利要求 书
1、 一种无线网络中的数据传输方法， 其特征在于， 包括：
第一接入点将给用户终端分配的数据信道传输的信息发送给第二接入点， 以使得所述第二接入点根据所述数据信道传输的信息， 利用所述数据信道 向所述用户终端发送数据；
其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于第 一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。
2、 根据权利要求 1所述的方法， 其特征在于， 所述的第一接入点将所述给 用户终端分配的数据信道传输的信息发送给第二接入点之前还包括： 所述第一接入点为所述用户终端选择所述第二接入点。
3、 根据权利要求 1或 2所述的方法， 其特征在于， 在所述第一接入点将所述 给用户终端分配的数据信道传输的信息发送给所述第二接入点之前， 所述方法 还包括： 所述第一接入点根据所述用户终端报告的所述第一接入点与所述用户终端 之间的信道质量参数和 /或所述第二接入点与所述用户终端之间的信道质量参 数， 给所述用户终端分配数据信道传输的信息。
4、 根据权利要求 1至 3任一项所述的方法， 其特征在于， 所述的第一接入点将所述给用户终端分配的数据信道传输的信息发送给所 述第二接入点， 具体包括： 所述第一接入点通过所述第一接入点与所述第二接 入点之间的接口， 将所述给用户终端分配的数据信道传输的信息发送给所述第 二接入点； 所述第一接入点与所述第二接入点之间的接口包括： 时延小于第一阔值的 接口， 所述第一阔值不大于 1秒。
5、 根据权利要求 1至 4任一项所述的方法， 其特征在于， 所述给用户终端 分配的数据信道传输的信息包括： 数据信道占用的无线资源以及下列参数之一 或组合： 发射模式、 调制编码方式、 功率分配信息及混合自动重传请求 HARQ 信息。
6、根据权利要求 1至 5任一项所述的方法，其特征在于，所述的方法还包括： 所述第一接入点利用所述数据信道向用户终端发送第一参考信号； 所述第一接入点通过和用户终端之间的控制信道将给用户终端分配的数据 信道传输的信息发送给用户终端， 以使所述用户终端根据所述数据信道传输的 信息， 接收所述第二接入点利用所述数据信道向所述用户终端发送的数据。
7、 根据权利要求 1至 6任一项所述的无线网络中的数据传输方法， 其特征在 于， 在所述第二接入点根据所述数据信道传输的信息， 利用所述数据信道向所 述用户终端发送数据后， 所述方法还包括：
所述第一接入点接收所述用户终端发送的所述数据的确认应答 ACK信号或 所述数据的非确认应答 NACK信号； 当所述第一接入点接收到所述 NACK信号 时， 所述第一接入点通知所述第二接入点向所述用户终端重新发送所述数据； 或
所述第一接入点接收所述第二接入点转发的来自所述用户终端的所述数据 的确认应答 ACK信号或所述数据的非确认应答 NACK信号；当所述第一接入点 接收到所述 NACK信号时， 所述第一接入点通知所述第二接入点向所述用户终 端重新发送所述数据。
8、 根据权利要求 1至 7任一项所述的无线网络中的数据传输方法， 其特征 在于， 还包括： 所述第一接入点向用户终端发送用于数据传输控制的其他公共信道信息， 所述公共信道信息包括主同步信道， 辅同步信道和物理层广播信道中至少一种。
9、 一种无线网络中的数据传输方法， 其特征在于， 包括： 第二接入点接收第一接入点给用户终端分配的数据信道传输的信息， 其中； 所述第二接入点根据所述数据信道传输的信息， 利用所述数据信道向所述 用户终端发送数据； 其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于第 一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。
10、 根据权利要求 9所述的方法， 其特征在于， 所述第二接入点根据所述数 据信道传输的信息， 利用所述数据信道向所述用户终端发送数据， 包括：
所述第二接入点根据从所述第一接入点接收到的所述给用户终端分配的数 据信道传输的信息， 以所述第一接入点或所述第二接入点的身份， 利用所述数 据信道向所述用户终端发送数据。
11、 根据权利要求 9或 10所述的方法， 其特征在于， 还包括：
所述第二接入点利用所述数据信道向所述用户终端发送第二参考信号。
12、 一种无线网络中的第一接入点， 其特征在于， 包括： 资源分配模块， 用于给用户终端分配数据信道传输的信息； 资源信息发送模块， 用于将给用户终端分配的数据信道传输的信息发送给 第二接入点； 其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于第 一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。
13、 根据权利要求 12所述第一接入点， 其特征在于， 所述第一接入点还包 括：
第二接入点选择模块， 用于为所述用户终端选择所述第二接入点。
14、 根据权利要求 12或 13所述的无线网络中的第一接入点， 其特征在于， 所述第一接入点还包括：
参考信息发送模块， 用于利用所述数据信道向用户终端发送第一参考信号； 所述资源信息发送模块， 还用于通过所述第一接入点和用户终端之间的控 制信道给用户终端分配的数据信道传输的信息发送给用户终端， 以使所述用户 终端根据所述数据信道传输的信息， 接收所述第二接入点利用所述数据信道向 所述用户终端发送的数据。
15、 一种无线网络中的第二接入点， 其特征在于， 包括： 资源信息接收模块， 用于接收第一接入点给用户终端分配的数据信道传输 的信息； 数据发送模块， 用于根据所述数据信道传输的信息， 利用所述数据信道向 所述用户终端发送数据； 其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于第 一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。
16、 根据权利要求 15所述的第二接入点， 其特征在于： 所述数据发送模块， 具体用于从所述第一接入点接收到的所述给用户终端 分配的数据信道传输的信息， 以所述第一接入点或所述第二接入点的身份， 利 用所述数据信道向所述用户终端发送数据。
17、 一种无线网络中的数据传输方法， 其特征在于， 包括：
用户终端接收第一接入节点给所述用户终端分配的数据信道传输的信息； 用户终端根据所述数据信道传输的信息， 接收第二接入点根据所述数据信 道传输的信息， 利用所述数据信道向所述用户终端发送的数据；
其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于第 一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。
18、 根据权利要求 17所述的方法， 其特征在于， 所述给用户终端分配的数 据信道传输的信息包括： 数据信道占用的无线资源以及下列参数之一或组合： 发射模式、 调制编码方式、 功率分配信息及混合自动重传请求 HARQ信息。
19、 一种用户终端， 其特征在于， 包括： 资源信息接收模块， 用于接收第一接入点给用户终端分配的数据信道传输 的信息；
数据接收模块， 用于根据所述数据信道传输的信息， 接收第二接入点根据 所述数据信道传输的信息， 利用所述数据信道向所述用户终端发送的数据； 其中， 所述第一接入点在所述数据信道上不传输数据， 或以小于或等于第 一功率的发射功率， 向除所述用户终端外的其它用户终端发送数据。
20、 根据权利要求 19所述的用户终端， 其特征在于， 所述给用户终端分配 的数据信道传输的信息包括： 数据信道占用的无线资源以及下列参数之一或组 合： 发射模式、调制编码方式、 功率分配信息及混合自动重传请求 HARQ信息。
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