WO2013060253A1 - 一种控制信令传输方法、基站、终端和系统 - Google Patents

一种控制信令传输方法、基站、终端和系统 Download PDF

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Publication number
WO2013060253A1
WO2013060253A1 PCT/CN2012/083321 CN2012083321W WO2013060253A1 WO 2013060253 A1 WO2013060253 A1 WO 2013060253A1 CN 2012083321 W CN2012083321 W CN 2012083321W WO 2013060253 A1 WO2013060253 A1 WO 2013060253A1
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WIPO (PCT)
Prior art keywords
terminal
base station
control channel
downlink control
signaling
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PCT/CN2012/083321
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English (en)
French (fr)
Inventor
史志华
沈晓冬
刘建军
潘成康
王启星
刘光毅
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中国移动通信集团公司
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Application filed by 中国移动通信集团公司 filed Critical 中国移动通信集团公司
Priority to US14/354,194 priority Critical patent/US20140301335A1/en
Priority to EP12843628.4A priority patent/EP2773060B1/en
Publication of WO2013060253A1 publication Critical patent/WO2013060253A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • a control signaling transmission method, a base station, a terminal and a system The application is filed on October 27, 2011, the Chinese Patent Office, the application number is 201110332505.4, and the invention name is "a control signaling transmission method, a base station, a terminal, and a system.” The priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference.
  • the present invention relates to the field of wireless communications, and in particular, to a control signaling transmission method, a base station, a terminal, and a system.
  • a Transmission Time Interval ( ⁇ ) pair (2 slots)
  • the first Orthogonal Frequency Division Multiplexing (OFDM) symbols are used for the transmission of the Physical Downlink Control Channel (PDCCH), and the subsequent symbols are used for data transmission.
  • a PDCCH may occupy 1-3 OFDM symbols (a downlink system is greater than 10 Physical Resource Blocks (PRBs)), or 2-4 OFDM symbols (a downlink system is less than or equal to 10 RPBs), how many OFDM symbols are specifically occupied by the Physical Control Format Indicator Channel (PCFICH) information indication.
  • PRBs Physical Resource Blocks
  • PCFICH Physical Control Format Indicator Channel
  • FIG. 1 is a schematic diagram of transmitting a PDCCH at a certain moment, where the PDCCH occupies the first three OFDM symbols.
  • LTE R8 Multiple-Input Multiple-Output ( ⁇ ) technology has become more and more widely used.
  • LTE R9 and LTE R10 multi-user multiple-input multiple-output (Multiple-User Multiple-Input Multiple) -Output, MU-MIMO)
  • MU-MIMO multiple-User Multiple-Input Multiple
  • the working mechanism has been enhanced and optimized. It is expected that the number of terminals operating under the MU-MIMO mechanism will be greatly increased in LTE R9 and LTE R10. In order to support simultaneous transmission of a large number of users, this poses a challenge to the capacity of the system PDCCH.
  • a macro cell (marco cell) and multiple radio remote units (RRHs) share the same cell ID (cell ID), that is, in a cell scenario, where PDCCH capacity is limited. , unable to support a large number of users, so there is a higher demand for PDCCH capacity.
  • cell ID cell ID
  • LTE R11 is currently discussing the Enhanced Physical Downlink Control Channel (E-PDCCH).
  • E-PDCCH Enhanced Physical Downlink Control Channel
  • the basic idea of the enhanced PDCCH is to place the information of the control channel on the physical downlink shared channel in R8/9/10 (Physical Downlink).
  • Shared Channel, PDSCH is transmitted on the resource, currently
  • the cell with content 1 indicates the resource occupied by the PDCCH
  • the cell with content 13 indicates the resource occupied by the PDCCH and the E-PDCCH.
  • the cells of content 2 and 3 represent the resources occupied by the E-PDCCH.
  • the cell with content 1 indicates the resource occupied by the PDCCH
  • the cell with content 13 indicates the resource shared by the PDCCH and the E-PDCCH.
  • the cells with contents 2, 3, 4, and 5 all represent the resources occupied by the E-PDCCH.
  • Embodiments of the present invention provide a control signaling transmission method, a base station, a terminal, and a system, which are used to implement a pair of operations.
  • a control signaling transmission method comprising:
  • the base station notifies the terminal to switch to the enhanced downlink control channel mode, where the signaling is used to notify the terminal that the resource corresponding to the enhanced downlink control channel and the PDCCH of the downlink control channel are common when the terminal operates in the enhanced downlink control channel mode.
  • the base station After receiving the feedback message of the terminal, the base station transmits control signaling to the terminal by using resources corresponding to the enhanced downlink control channel and resources corresponding to the Common search space;
  • the feedback message is used to notify the base station that the terminal has switched to the enhanced downlink control channel mode.
  • a base station, the base station includes:
  • a first sending module configured to notify the terminal to switch to an enhanced downlink control channel mode, where the signaling is used to notify the terminal that the resource corresponding to the enhanced downlink control channel is in the enhanced downlink control channel mode Resource detection control signaling corresponding to a common search space of the downlink control channel PDCCH;
  • a receiving module configured to receive a feedback message of the terminal, where the feedback message is used to notify a base station, where the terminal has switched to an enhanced downlink control channel mode;
  • the signaling transmission module is configured to: after receiving the feedback message, the receiving module transmits control signaling to the terminal by using a resource corresponding to the enhanced downlink control channel and a resource corresponding to the Common search space.
  • a terminal, the terminal includes:
  • a first receiving module configured to receive, by the base station, signaling that the terminal switches to the enhanced downlink control channel mode, where the signaling is used to notify the terminal that the enhanced downlink control channel mode is in the enhanced downlink control channel mode. And the resource detection control signaling corresponding to the common search space of the downlink control channel PDCCH; the first sending module, configured to send a feedback message to the base station, where the feedback message is used to notify the base station that the terminal has switched To the enhanced downlink control channel mode; a second receiving module, configured to receive, by the base station, a resource corresponding to the enhanced downlink control channel, and a downlink control channel
  • Common search space of PDCCH Common control space corresponds to control signaling of resource transmission.
  • a control signaling transmission system comprising a base station and a terminal, wherein:
  • the base station is configured to notify the terminal to switch to the enhanced downlink control channel mode by using signaling, where the signaling is used to notify the terminal that the resource corresponding to the enhanced downlink control channel and the downlink control channel when the terminal operates in the enhanced downlink control channel mode
  • the resource detection control signaling corresponding to the common search space of the PDCCH after receiving the feedback message of the terminal, transmitting a control message to the terminal by using the resource corresponding to the enhanced downlink control channel and the resource corresponding to the Common search space
  • the feedback message is used to notify the base station that the terminal has switched to the enhanced downlink control channel mode;
  • the terminal is configured to receive, by the base station, a signaling, a control signal that the terminal intercepts to the enhanced downlink control channel mode, and returns a feedback message to the base station.
  • the base station may transmit control signaling to the terminal by using the resource corresponding to the E-PDCCH and the resource corresponding to the Common search space, that is, in the E-PDCCH mode.
  • the method for sending control signaling on the resource corresponding to the Common search space is reserved, thereby providing an effective mechanism for implementing control signaling transmission for the terminal operating in the E-PDCCH mode.
  • FIG. 2 is a schematic diagram of transmitting an E-PDCCH at a certain moment in the prior art
  • FIG. 3 is a schematic diagram of transmitting an E-PDCCH at a certain moment in the prior art
  • FIG. 5 is a schematic structural diagram of a base station according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic structural diagram of a terminal according to Embodiment 3 of the present invention.
  • FIG. 7 is a schematic structural diagram of a control signaling transmission system according to Embodiment 4 of the present invention.
  • the solution provided by the embodiment of the present invention provides an effective signaling transmission mechanism.
  • the method for sending control signaling on the resource corresponding to the Common search space can enable the terminal to perform E.
  • the fuzzy period problem existing between the PDCCH mode and the E-PDCCH mode switching is resolved, the smooth handover between the PDCCH mode and the E-PDCCH mode is implemented, and the E-PDCCH is avoided.
  • a first embodiment of the present invention provides a control signaling transmission method.
  • the process of the method is as shown in FIG. 4, and specifically includes: Step 101: Determine a working mode of the terminal.
  • step 102 it can be determined whether the terminal operates in the enhanced downlink control channel mode. If it is determined that the terminal operates in the enhanced downlink control channel mode, step 102 can be continued.
  • the base station may notify the terminal (UE) to transmit control signaling to the terminal on the set physical resource. Specifically, the base station may pass The first Radio Resource Control (RRC) signaling notification terminal (UE) will transmit control signaling to the terminal on the set physical resource, and notify the UE to enter the working mode of the enhanced downlink control channel (may)
  • RRC Radio Resource Control
  • the UE After receiving the RRC signaling, the UE returns a corresponding feedback message to the base station (eg, a first RRC feedback message, that is, an RRC feedback message for the first RRC signaling), and notifies the base station.
  • the UE has switched to the enhanced downlink control channel mode, and the UE performs control signaling detection on the set physical resource according to the first RRC signaling indication, that is, works in the E-PDCCH mode.
  • control signaling can be in two different search spaces.
  • a UE-specific search space which can be used for transmission of control signaling of a specific terminal (UE);
  • Common search space which can be used for transmission of common control signaling of all terminals, and can also be used for transmission of control signaling of any one UE.
  • the set physical resource includes not only the resource corresponding to the enhanced downlink control channel, but also the resource corresponding to the common search space of the downlink control channel, that is, when the terminal works in the E-PDCCH mode.
  • the detection of the control signaling of the resource corresponding to the enhanced downlink control channel is performed, and the detection of the control signaling on the resource corresponding to the Common search space of the downlink control channel is also maintained.
  • the base station may determine that the terminal works in the enhanced downlink control channel mode when receiving the feedback (first RRC feedback message) corresponding to the terminal.
  • Step 102 Transmit control signaling to the terminal.
  • the base station when determining that the terminal operates in the enhanced downlink control channel mode, may transmit control signaling to the terminal by using resources corresponding to the enhanced downlink control channel and resources corresponding to the Common search space of the downlink control channel.
  • the base station after the base station notifies the terminal to switch to the enhanced downlink control channel mode by using the first RRC signaling, before receiving the first RRC feedback message of the terminal, the base station is in a fuzzy period, and is not sure of each of the UEs. Whether the specific time works in the E-PDCCH mode or works in the PDCCH mode, and the base station can The resource corresponding to the Common search space transmits control signaling to the terminal.
  • Step 103 Notify the terminal to switch to the downlink control channel mode.
  • the base station can notify the terminal to switch from the enhanced downlink control channel mode to the traditional downlink control channel mode (which can be recorded as the PDCCH mode). Specifically, the base station can notify the terminal to switch from the enhanced downlink control channel mode by using the second RRC signaling.
  • the downlink control channel mode after the base station notifies the terminal to switch from the enhanced downlink control channel mode to the downlink control channel mode, receiving a feedback message of the terminal (eg, a second RRC feedback message, that is, for the second RRC signaling Before the RRC feedback message), this period is in a fuzzy period, that is, it is not determined whether the UE works in the E-PDCCH mode or in the PDCCH mode at each specific moment, and the base station can pass the Common search.
  • the resource corresponding to space transmits control signaling to the terminal.
  • the second RRC feedback message is used to notify the base station that the terminal has switched to the downlink control channel mode.
  • the base station may use the resource corresponding to the common search space.
  • the terminal transmits control signaling.
  • the base station may transmit control signaling to the terminal by using a resource corresponding to the Common search space or a resource corresponding to the UE-specific search space.
  • the processing of the UE control information transmission may have different solutions.
  • the base station before the base station sends a handover command to the UE, the base station notifies the UE to switch to the traditional PDCCH mode, determines that the UE completes the handover, and then determines whether to instruct the UE to switch to the UE according to the UE feedback and the system situation.
  • the terminal switches to the traditional PDCCH mode process according to the notification of the base station (eg, through related RRC signaling) E-PDCCH mode, and the transmission of the control signaling is the same as step 103, that is, before the handover is completed,
  • the resource corresponding to the Common search space transmits control signaling to the terminal, and after the handover is completed, the control signaling is transmitted to the terminal by using a resource corresponding to the Common search space or a resource corresponding to the UE-specific search space.
  • the terminal switches from PDCCH mode to traditional according to the notification of the base station (such as through related RRC signaling)
  • the transmission of the control signaling is the same as step 102, that is, before the handover is completed, by the
  • the resource corresponding to the common search space transmits control signaling to the terminal, and after the handover is completed, the control signaling is transmitted to the terminal by using the resource corresponding to the enhanced downlink control channel and the resource corresponding to the Common search space.
  • the base station does not transmit an instruction for PDCCH or E-PDCCH handover.
  • the base station determines that the terminal transmits the control signaling to the terminal through the resource corresponding to the Common search space before the terminal switches to the neighboring cell.
  • the base station determines whether the parameter configuration of the enhanced downlink control channel corresponding to the terminal before the handover is available, and if it can be used, that is, there is no conflict with other terminals in the current cell, and the base station passes the enhanced downlink control.
  • the source and the resource corresponding to the common search space transmit control signaling to the terminal; otherwise, when determining that there is a conflict between the parameter configuration and other terminals in the current cell, the base station may notify the terminal to update the enhanced downlink control channel by using a higher layer command. Parameter configuration.
  • the base station After the terminal is switched from the current cell to the neighboring cell, the base station notifies the terminal to update the parameter configuration in the enhanced downlink control channel by using a higher layer command, or the base station updates the corresponding parameter configuration of the E-PDCCH by using a higher layer command. For example, changing the E-PDCCH search space of the UE, etc.:
  • the base station may transmit the control signal to the terminal through the resource corresponding to the Common search space before receiving the high layer instruction feedback message of the terminal.
  • the high-level instruction feedback message is used to notify the base station that the terminal has completed updating the parameter configuration in the enhanced downlink control channel.
  • the base station After receiving the high-level instruction feedback message of the terminal, the base station transmits control signaling to the terminal according to the updated parameter configuration.
  • the control signaling method can be transmitted to the terminal in various states, but also the fuzzy period problem caused by the working mode of the indeterminate terminal can be solved, and the PDCCH and the E- The search space of the PDCCH is blindly detected, which reduces the detection complexity of the UE, thereby reducing the equipment cost.
  • the second embodiment of the present invention provides a base station, and the structure of the base station is as shown in FIG. 5, which specifically includes: the first sending module 11 is configured to notify the terminal to switch to an enhanced downlink control channel mode by using signaling, where the signaling is used for When the terminal is notified to work in the enhanced downlink control channel mode, the resource corresponding to the enhanced downlink control channel and the resource search control signaling corresponding to the common search space of the downlink control channel PDCCH;
  • the receiving module 12 is configured to receive a feedback message of the terminal, where the feedback message is used to notify the base station that the terminal has switched to the enhanced downlink control channel mode;
  • the signaling transmission module 13 is configured to: after receiving the feedback message, the receiving module transmits control signaling to the terminal by using a resource corresponding to the enhanced downlink control channel and a resource corresponding to the Common search space.
  • the first sending module 11 is specifically configured to notify the terminal to switch to the enhanced downlink control channel mode by using the first RRC signaling.
  • the receiving module 12 is specifically configured to receive a first RRC feedback message of the terminal.
  • the signaling transmission module 13 is further configured to: after the first sending module notifies the terminal to switch to the enhanced downlink control channel mode, before the receiving module receives the first RRC feedback message of the terminal, by using the common search space The resource transmits control signaling to the terminal.
  • the first sending module 11 is further configured to notify the terminal to switch from the enhanced downlink control channel mode to the downlink control channel mode by using the second RRC signaling.
  • the receiving module 12 is further configured to receive a second RRC feedback message of the terminal, where the second RRC feedback message is used to notify the base station that the terminal has switched to the downlink control channel mode.
  • the signaling transmission module 13 is further configured to: after the first sending module notifies the terminal to switch from the enhanced downlink control channel mode to the downlink control channel mode, before the receiving module receives the second RRC feedback message of the terminal, The resource corresponding to the Common search space transmits control signaling to the terminal.
  • the base station further includes a second sending module 14, a determining module 15 and a third sending module 16, wherein: the second sending module 14 is configured to notify the terminal to switch from the current cell to the neighboring cell by using a handover instruction;
  • the determining module 15 is for determining whether the terminal has switched to the neighboring cell.
  • the signaling transmission module 13 is specifically configured to: after the second sending module notifies the terminal to switch from the current cell to the neighboring cell, the determining module determines that the terminal has switched to the neighboring cell, and transmits the resource corresponding to the common search space to the terminal. Controlling signaling, and after determining that the terminal has switched to the neighboring cell, determining whether the parameter configuration of the enhanced downlink control channel corresponding to the terminal before the handover is available, and if applicable, the resource corresponding to the enhanced downlink control channel The resource corresponding to the Common search space transmits control signaling to the terminal, and if not available, triggers the third sending module.
  • the third sending module 16 is configured to notify the terminal to update the parameter configuration in the enhanced downlink control channel by using a higher layer command.
  • the receiving module 12 is further configured to receive a high-level instruction feedback message of the terminal, where the high-level instruction feedback message is used to notify the base station that the terminal has completed updating the parameter configuration.
  • the signaling transmission module 13 is further configured to: after the third sending module included in the base station notifies the terminal to update the parameter configuration in the enhanced downlink control channel by using a high layer command, before the receiving module receives the high layer instruction feedback message of the terminal, Controlling signaling is transmitted to the terminal by using the resource corresponding to the common search space, and after the receiving module receives the high-level instruction feedback message of the terminal, transmitting control signaling to the terminal according to the updated parameter configuration.
  • a third embodiment of the present invention provides a terminal.
  • the structure of the terminal is as shown in FIG. 6.
  • the first receiving module 21 is configured to receive signaling that the base station notifies the terminal to switch to the enhanced downlink control channel mode.
  • the resource detection control signaling corresponding to the common search space Common search space of the resource of the enhanced downlink control channel and the common search space of the downlink control channel PDCCH when the terminal is configured to operate in the enhanced downlink control channel mode;
  • the first sending module 22 The method is used to send a feedback message to the base station, where the feedback message is used to notify the base station that the terminal has switched to the enhanced downlink control channel mode;
  • the second receiving module 23 is configured to receive the base station corresponding to the enhanced downlink control channel.
  • the first receiving module 21 is specifically configured to receive, by the base station, the first radio resource control protocol (RRC) signaling that the terminal notifies to switch to the enhanced downlink control channel mode.
  • RRC radio resource control protocol
  • the first sending module 22 is specifically configured to send a first RRC feedback message to the base station.
  • the second receiving module 23 is further configured to receive, by the base station, the control signaling to the terminal by using the resource corresponding to the Common search space.
  • the first receiving module 21 is further configured to receive, by the base station, a second RRC signaling that the terminal notifies the terminal to switch from the enhanced downlink control channel mode to the downlink control channel mode;
  • the first sending module 22 is configured to send a second RRC feedback message to the base station, where the second RRC feedback message is used to notify the base station that the terminal has switched to the downlink control channel mode.
  • the terminal further includes:
  • the third receiving module 24 is configured to receive a handover instruction that the base station notifies the terminal to switch from the current cell to the neighboring cell.
  • the fourth receiving module 25 is configured to receive a high-level instruction that the base station notifies the terminal to update the parameter configuration in the enhanced downlink control channel.
  • the terminal further includes:
  • the second sending module 26 is configured to send a high-level instruction feedback message to the terminal, where the high-level instruction feedback message is used to notify the base station that the terminal has completed updating the parameter configuration;
  • the second receiving module 23 is specifically configured to receive control signaling that the base station transmits according to the updated parameter configuration.
  • a fourth embodiment of the present invention provides a control signaling transmission system.
  • the schematic structural diagram of the system is shown in FIG. 7, which specifically includes a base station 31 and a terminal 32, where:
  • the base station 31 is configured to notify the terminal to switch to the enhanced downlink control channel mode, where the signaling is used to notify the terminal that the resource corresponding to the enhanced downlink control channel and the downlink control channel when the terminal operates in the enhanced downlink control channel mode.
  • the resource detection control signaling corresponding to the common search space of the PDCCH after receiving the feedback message of the terminal, transmitting a control message to the terminal by using the resource corresponding to the enhanced downlink control channel and the resource corresponding to the Common search space
  • the feedback message is used to notify the base station that the terminal has switched to the enhanced downlink control channel mode;
  • the terminal 32 is configured to receive, by the base station, a signaling, a control signal that the notification terminal switches to the enhanced downlink control channel mode, and returns a feedback message to the base station.
  • the base station in this embodiment may have the same structure as the base station in the second embodiment, and each functional unit may perform a corresponding function.
  • the terminal in this embodiment may have the same structure as the terminal in the third embodiment, and each has the same structure.
  • the functional unit can perform the corresponding function.
  • control signaling transmission system provided by the embodiment of the present invention can not only solve the fuzzy period problem caused by the working mode of the indeterminate terminal by defining the control signaling method to the terminal in various states. Blind detection of the search space of the PDCCH and the E-PDCCH can be avoided, and the detection complexity of the UE is reduced, thereby reducing the equipment cost.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention is in the form of a computer program product embodied on one or more computer usable storage modules (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
  • computer usable storage modules including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the present invention is directed to a flowchart, and a method, apparatus (system), and computer program product according to embodiments of the present invention.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

本发明实施例提供一种控制信令传输方法、基站、终端和系统，包括：在终端工作在E-PDCCH模式下时，基站可以通过E-PDCCH对应的资源和Common search space对应的资源向该终端传输控制信令，即在E-PDCCH模式下，保留了在Common search space对应的资源上发送控制信令的方法，从而提出一种有效的机制，实现对工作于E-PDCCH模式下的终端的控制信令传输。

Description

一种控制信令传输方法、 基站、 终端和系统 本申请要求在 2011年 10月 27日提交中国专利局、 申请号为 201110332505.4、 发明名称为 "一种控 制信令传输方法、 基站、 终端和系统"的中国专利申请的优先权， 其全部内容通过引用结合在本申请 中。 技术领域 本发明涉及无线通信领域， 尤其涉及一种控制信令传输方法、 基站、 终端和系统。 背景技术 在第 8、 9、 10版本（R8/9/10 ) 的长期演进（ Long Term Evolution , LTE ) 系统中， 一 个传输时间间隔（ Transmission Time Interval , ΤΤΙ )对（2个时隙 （slot ) )里前面几个正交 频分复用 （Orthogonal Frequency Division Multiplexing , OFDM )符号用于下行控制信道 ( Physical Downlink Control Channel , PDCCH )的传输， 后续符号用于数据的传输。 根据 系统配置的不同， 传统 LTE系统中， PDCCH可能占用 1-3个 OFDM符号 （下行系统大于 10个物理资源块（Physical Resource Block , PRB ) ), 或者 2-4个 OFDM符号（下行系统小 于等于 10个 RPB ),具体占用多少个 OFDM符号由物理控制格式指示信道（Physical Control Format Indicator Channel , PCFICH )信息指示。 终端 （ UE )通过检测 PCFICH信息， 可 以确定当前时刻的传输中， PDCCH占用了几个 OFDM符号，以及数据传输从第几个 OFDM 符号开始。如图 1所示为某个时刻传输 PDCCH的示意图，其中， PDCCH占用前 3个 OFDM 符号。
从 LTE R8开始， 多输入多输出 （ Multiple-Input Multiple-Output , ΜΙΜΟ )技术获得越 来越广泛的应用， 在 LTE R9 和 LTE R10 中， 多用户多输入多输出 （Multiple-User Multiple-Input Multiple-Output , MU-MIMO ) 工作机制得到了增强和优化。 预计在 LTE R9 和 LTE R10中， 工作于 MU-MIMO机制下的终端数量将会大大增加。 为了支持大量用户的 同时传输， 这对系统 PDCCH的容量提出了挑战。
而对一些新型的部署场景， 例如一个宏小区（ marco cell ) 和多个射频拉远单元（ RRH ) 共享相同的小区标识（cell ID ), 即在一个小区的场景下， 此时 PDCCH容量受限， 无法支 持大量用户， 因此对 PDCCH容量提出了更高的需求。
因此， LTE R11 目前开始讨论增强型 PDCCH ( Enhanced Physical Downlink Control Channel, E-PDCCH ), 增强型 PDCCH的基本思想是把控制信道的信息放在 R8/9/10 中的物 理下行共享信道（ Physical Downlink Shared Channel， PDSCH )的资源上进行传输， 目前已 有一些方案， 具体的可以如图 2和图 3所示， 在图 2中， 内容为 1的单元格表示 PDCCH占 用的资源， 内容为 13的单元格表示 PDCCH和 E-PDCCH共同占用的资源， 内容为 2和 3 的单元格均表示 E-PDCCH占用的资源， 在图 3中， 内容为 1的单元格表示 PDCCH占用的 资源， 内容为 13的单元格表示 PDCCH和 E-PDCCH共同占用的资源， 内容为 2、 3、 4和 5 的单元格均表示 E-PDCCH占用的资源。
但是目前对于 E-PDCCH还没有细化的设计方案， 对于 E-PDCCH和传统的 PDCCH相 互关系如何， 如何有效配合工作还都没有设计方案。 发明内容 本发明实施例提供一种控制信令传输方法、 基站、 终端和系统， 用于实现对工作于
E-PDCCH模式下的终端的控制信令传输。
一种控制信令传输方法， 所述方法包括：
基站通过信令通知终端切换到增强型下行控制信道模式， 该信令用于通知该终端工作 在增强型下行控制信道模式下时， 在增强型下行控制信道对应的资源和下行控制信道 PDCCH的公共搜索空间 Common search space对应的资源检测控制信令；
基站在接收到该终端的反馈消息之后， 通过增强型下行控制信道对应的资源和所述 Common search space对应的资源向该终端传输控制信令；
所述反馈消息用于通知基站， 所述终端已切换至增强型下行控制信道模式下。
一种基站， 所述基站包括：
第一发送模块， 用于通过信令通知终端切换到增强型下行控制信道模式， 该信令用于 通知该终端工作在增强型下行控制信道模式下时，在增强型下行控制信道对应的资源和下行 控制信道 PDCCH的公共搜索空间 Common search space对应的资源检测控制信令；
接收模块， 用于接收该终端的反馈消息， 所述反馈消息用于通知基站， 所述终端已切 换至增强型下行控制信道模式下；
信令传输模块，用于接收模块接收到所述反馈消息之后，通过增强型下行控制信道对应 的资源和所述 Common search space对应的资源向该终端传输控制信令。
一种终端， 所述终端包括：
第一接收模块， 用于接收基站通知终端切换到增强型下行控制信道模式的信令， 该信 令用于通知该终端工作在增强型下行控制信道模式下时，在增强型下行控制信道对应的资源 和下行控制信道 PDCCH的公共搜索空间 Common search space对应的资源检测控制信令； 第一发送模块， 用于向所述基站发送反馈消息， 所述反馈消息用于通知基站， 所述终 端已切换至增强型下行控制信道模式下； 第二接收模块， 用于接收基站通过增强型下行控制信道对应的资源和下行控制信道
PDCCH的公共搜索空间 Common search space对应的资源传输的控制信令。
一种控制信令传输系统， 所述系统包括基站和终端， 其中：
基站， 用于通过信令通知终端切换到增强型下行控制信道模式， 该信令用于通知该终 端工作在增强型下行控制信道模式下时，在增强型下行控制信道对应的资源和下行控制信道 PDCCH的公共搜索空间 Common search space对应的资源检测控制信令， 在接收到该终端 的反馈消息之后， 通过增强型下行控制信道对应的资源和所述 Common search space对应的 资源向该终端传输控制信令，所述反馈消息用于通知基站，所述终端已切换至增强型下行控 制信道模式下；
终端， 用于接收基站传输的通知终端切换到增强型下行控制信道模式的信令、 控制信 令并向所述基站返回反馈消息。
根据本发明实施例提供的方案， 在终端工作在 E-PDCCH模式下时， 基站可以通过 E-PDCCH对应的资源和 Common search space对应的资源向该终端传输控制信令， 即在 E-PDCCH模式下，保留了在 Common search space对应的资源上发送控制信令的方法，从而 提出一种有效的机制， 实现对工作于 E-PDCCH模式下的终端的控制信令传输。 附图说明 图 1为现有技术中某个时刻传输 PDCCH的示意图；
图 2为现有技术中某个时刻传输 E-PDCCH的示意图；
图 3为现有技术中某个时刻传输 E-PDCCH的示意图；
图 4为本发明实施例一提供的一种控制信令传输方法的步骤流程图；
图 5为本发明实施例二提供的一种基站的结构示意图；
图 6为本发明实施例三提供的一种终端的结构示意图；
图 7为本发明实施例四提供的一种控制信令传输系统的结构示意图。 具体实施方式 本发明实施例提供的方案中提出一种有效的信令传输机制， 在 E-PDCCH模式下， 结合 在 Common search space对应的资源上发送控制信令的方法，可以使得终端在进行 E-PDCCH 模式和 PDCCH模式之间的切换时， 解决 PDCCH模式和 E-PDCCH模式切换之间存在的模 糊期问题， 实现 PDCCH模式和 E-PDCCH模式之间的平滑切换， 以及避免在 E-PDCCH的 参数配置更新过程和终端的小区切换过程中， 由于不确定终端的工作状态导致的模糊期和 E-PDCCH资源冲突问题。 下面结合说明书附图和各实施例对本发明方案进行详细说明。
实施例一、
本发明实施例一提供一种控制信令传输方法，该方法的步骤流程如图 4所示，具体包括： 步骤 101、 确定终端的工作模式。
在本步骤中，可以确定终端是否工作在增强型下行控制信道模式下，若确定终端工作在 增强型下行控制信道模式下， 可以继续执行步骤 102。
基站（网络）和终端按照 LTE R8/9/10的工作机制进行工作时，基站可以通知终端（ UE ) 将在设定的物理资源上向所述终端传输控制信令，具体的，基站可以通过第一无线资源控制 协议（ Radio Resource Control, RRC )信令通知终端 （ UE )将在设定的物理资源上向所述 终端传输控制信令， 通知 UE 进入增强型下行控制信道的工作模式 （可以记为 E-PDCCH mode ), UE接到该 RRC信令后， 给基站返回对应的反馈消息 （如， 第一 RRC反馈消息， 即针对所述第一 RRC信令的 RRC反馈消息）， 通知基站自身已切换至增强型下行控制信道 模式下， 且 UE按照所述第一 RRC信令指示到设定的物理资源上进行控制信令的检测， 即 工作到 E-PDCCH mode。
LTE R8/9/10 中的现有的 PDCCH传输模式下， 控制信令可以在两个不同的搜索空间
( search space )上传输, 包括：
特定终端搜索空间 （UE-specific search space ), 该搜索空间可以用于特定的终端 （UE ) 的控制信令的传输；
公共搜索空间 （ Common search space ), 该搜索空间可以用于所有终端公共控制信令的 传输， 也可以用于任意一个 UE的控制信令的传输。
在本实施例中，所述设定的物理资源不仅包括增强型下行控制信道对应的资源，还包括 下行控制信道的公共搜索空间 Common search space对应的资源， 即终端工作在 E-PDCCH mode下时， 不仅对增强型下行控制信道对应的资源进行控制信令的检测， 同时还保持对下 行控制信道的 Common search space对应的资源上控制信令的检测。
在本步骤中， 基站可以在接收到终端对应的反馈 (第一 RRC反馈消息） 时， 确定该终 端工作在增强型下行控制信道模式下。
步骤 102、 向该终端传输控制信令。
本实施例中，在确定终端工作在增强型下行控制信道模式下时，基站可以通过增强型下 行控制信道对应的资源和下行控制信道的 Common search space对应的资源向该终端传输控 制信令。
进一步的， 基站通过第一 RRC信令通知该终端切换到增强型下行控制信道模式之后 , 接收该终端的第一 RRC反馈消息之前， 这一段时间内处于模糊期， 不确定 UE在其中的每 个具体时刻工作在 E-PDCCH 模式下还是工作在 PDCCH模式下， 基站可以通过所述 Common search space对应的资源向该终端传输控制信令。
本实施例还可以进一步包括以下步骤：
步骤 103、 通知终端切换到下行控制信道模式。
基站可以通知该终端从增强型下行控制信道模式切换到传统的下行控制信道模式（可以 记为 PDCCH mode ),具体的，基站可以通过第二 RRC信令通知该终端从增强型下行控制信 道模式切换到下行控制信道模式，在基站通知该终端从增强型下行控制信道模式切换到下行 控制信道模式之后 ,接收该终端的反馈消息（如，第二 RRC反馈消息，即针对所述第二 RRC 信令的 RRC反馈消息）之前， 这一段时间内处于模糊期， 即不确定 UE在其中的每个具体 时刻工作在 E-PDCCH 模式下还是工作在 PDCCH模式下， 此时， 基站可以通过所述 Common search space对应的资源向该终端传输控制信令。 其中， 所述第二 RRC反馈消息用 于通知基站， 所述终端已切换至下行控制信道模式下。
因此， 本实施例中， 在基站通知该终端从增强型下行控制信道模式切换到下行控制信 道模式之后 ,接收该终端的第二 RRC反馈消息之前，基站可以通过所述 Common search space 对应的资源向该终端传输控制信令。
当然， 基站在接收该终端的第二 RRC反馈消息之后， 可以通过 Common search space 对应的资源或 UE-specific search space对应的资源向该终端传输控制信令。
在终端工作在增强型下行控制信道模式下时， UE从当前小区向邻小区切换时， UE控 制信息传输的处理可以有不同的方案。
一种方案是， 基站在给 UE发出切换指令之前（或者同时）， 通知 UE 切换到传统的 PDCCH模式， 确定 UE完成切换后， 再根据 UE反馈和系统情况决定是否指示 UE切换到
E-PDCCH mode。在这种方案下，终端根据基站的通知（如通过相关的 RRC信令） E-PDCCH mode切换到传统的 PDCCH mode过程中， 控制信令的传输与步骤 103相同， 即在切换完成 之前，通过所述 Common search space对应的资源向该终端传输控制信令，在切换完成之后 , 通过 Common search space对应的资源或 UE-specific search space对应的资源向该终端传输控 制信令。 而终端根据基站的通知（如通过相关的 RRC信令）从 PDCCH mode切换到传统的
E-PDCCH mode过程中， 控制信令的传输与步骤 102相同， 即在切换完成之前， 通过所述
Common search space对应的资源向该终端传输控制信令， 在切换完成之后， 通过增强型下 行控制信道对应的资源和所述 Common search space对应的资源向该终端传输控制信令。
另一种方案是， 基站不发送关于 PDCCH或者 E-PDCCH切换的指令。 在这种方案中， 基站通过切换指令通知终端从当前小区切换到邻小区之后，确定终端切换到邻小区之前，基 站通过所述 Common search space对应的资源向该终端传输控制信令。 在确定终端切换到邻 小区之后 , 基站判断该终端切换之前对应的增强型下行控制信道的参数配置是否可以使用， 若可以使用， 即和当前小区其他终端之间没有冲突，基站通过增强型下行控制信道对应的资 源和所述 Common search space对应的资源向该终端传输控制信令； 否则， 在确定参数配置 和当前小区其他终端之间存在冲突时，基站可以通过高层指令通知终端更新增强型下行控制 信道中的参数配置。
在终端从当前小区切换到邻小区之后， 由于参数配置的冲突， 基站通过高层指令通知 终端更新增强型下行控制信道中的参数配置时， 或者， 基站通过高层指令更新 E-PDCCH相 应的参数配置时， 例如改变 UE的 E-PDCCH搜索空间等：
基站可以在通过高层指令通知终端更新增强型下行控制信道中的参数配置之后 ,接收该 终端的高层指令反馈消息之前， 通过 Common search space对应的资源向该终端传输控制信 令。 其中， 高层指令反馈消息用于通知基站， 终端已经完成增强型下行控制信道中的参数配 置的更新。
接收该终端的高层指令反馈消息之后 , 基站按照更新后的参数配置向该终端传输控制 信令。
根据本发明实施例一提供的方案， 不仅可以通过定义在各种状态下， 向终端传输控制信 令方法， 解决由于不确定终端的工作模式导致的模糊期问题， 还可以避免对 PDCCH 和 E-PDCCH的搜索空间进行盲检测， 降低 UE的检测复杂度， 从而降低设备成本。
与本发明实施例一基于同一发明构思， 提供以下的装置和系统。
实施例二、
本发明实施例二提供一种基站， 该基站的结构示意图如图 5所示， 具体包括： 第一发送模块 11用于通过信令通知终端切换到增强型下行控制信道模式， 该信令用于 通知该终端工作在增强型下行控制信道模式下时，在增强型下行控制信道对应的资源和下行 控制信道 PDCCH的公共搜索空间 Common search space对应的资源检测控制信令；
接收模块 12用于接收该终端的反馈消息， 所述反馈消息用于通知基站， 所述终端已切 换至增强型下行控制信道模式下；
信令传输模块 13用于接收模块接收到所述反馈消息之后，通过增强型下行控制信道对 应的资源和所述 Common search space对应的资源向该终端传输控制信令。
第一发送模块 11具体用于通过第一无线资源控制协议 RRC信令通知终端切换到增强 型下行控制信道模式。
接收模块 12具体用于接收该终端的第一 RRC反馈消息。
所述信令传输模块 13还用于在第一发送模块通知该终端切换到增强型下行控制信道模 式之后， 接收模块接收到该终端的第一 RRC反馈消息之前， 通过所述 Common search space 对应的资源向该终端传输控制信令。
所述第一发送模块 11还用于通过第二 RRC信令通知该终端从增强型下行控制信道模 式切换到下行控制信道模式。 所述接收模块 12还用于接收该终端的第二 RRC反馈消息，所述第二 RRC反馈消息用 于通知基站， 所述终端已切换至下行控制信道模式下。
所述信令传输模块 13还用于在第一发送模块通知该终端从增强型下行控制信道模式切 换到下行控制信道模式之后 , 接收模块接收到该终端的第二 RRC反馈消息之前， 通过所述 Common search space对应的资源向该终端传输控制信令。
所述基站还包括第二发送模块 14、 确定模块 15和第三发送模块 16, 其中： 第二发送模块 14用于通过切换指令通知终端从当前小区切换到邻小区；
确定模块 15用于确定终端是否已切换到邻小区。
所述信令传输模块 13 具体用于在第二发送模块通知终端从当前小区切换到邻小区之 后， 确定模块确定终端已切换到邻小区之前， 通过所述 Common search space对应的资源向 该终端传输控制信令， 以及在确定模块确定终端已切换到邻小区之后，判断该终端切换之前 对应的增强型下行控制信道的参数配置是否可以使用，若可以使用，通过增强型下行控制信 道对应的资源和所述 Common search space对应的资源向该终端传输控制信令， 若不可以使 用， 触发第三发送模块。
第三发送模块 16用于通过高层指令通知终端更新增强型下行控制信道中的参数配置。 所述接收模块 12还用于接收该终端的高层指令反馈消息， 所述高层指令反馈消息用于 通知基站， 终端已经完成所述参数配置的更新。
所述信令传输模块 13还用于在所述基站包括的第三发送模块通过高层指令通知终端更 新增强型下行控制信道中的参数配置之后 , 接收模块接收到该终端的高层指令反馈消息之 前， 通过所述 Common search space对应的资源向该终端传输控制信令， 以及在接收模块接 收到该终端的高层指令反馈消息之后 , 按照更新后的参数配置向该终端传输控制信令。
实施例三、
本发明实施例三提供一种终端， 该终端的结构示意图如图 6所示， 具体包括： 第一接收模块 21用于接收基站通知终端切换到增强型下行控制信道模式的信令， 该信 令用于通知该终端工作在增强型下行控制信道模式下时，在增强型下行控制信道对应的资源 和下行控制信道 PDCCH的公共搜索空间 Common search space对应的资源检测控制信令； 第一发送模块 22用于向所述基站发送反馈消息， 所述反馈消息用于通知基站， 所述终 端已切换至增强型下行控制信道模式下； 第二接收模块 23用于接收基站通过增强型下行控 制信道对应的资源和下行控制信道 PDCCH的公共搜索空间 Common search space对应的资 源传输的控制信令。
第一接收模块 21 具体用于接收基站通知终端切换到增强型下行控制信道模式的第一 无线资源控制协议 RRC信令。
第一发送模块 22具体用于向所述基站发送第一 RRC反馈消息。 第二接收模块 23还用于接收基站通过所述 Common search space对应的资源向该终端 传输控制信令。
所述第一接收模块 21 还用于接收基站通知该终端从增强型下行控制信道模式切换到 下行控制信道模式的第二 RRC信令；
所述第一发送模块 22用于向所述基站发送第二 RRC反馈消息，所述第二 RRC反馈消 息用于通知基站， 所述终端已切换至下行控制信道模式下。
所述终端还包括：
第三接收模块 24用于接收基站通知终端从当前小区切换到邻小区的切换指令； 第四接收模块 25 用于接收基站通知终端更新增强型下行控制信道中的参数配置的高 层指令。
所述终端还包括：
第二发送模块 26用于向所述终端发送高层指令反馈消息，所述高层指令反馈消息用于 通知基站， 终端已经完成所述参数配置的更新；
第二接收模块 23具体用于接收基站按照更新后的参数配置传输的控制信令。
实施例四、
本发明实施例四提供一种控制信令传输系统， 该系统的结构示意图如图 7所示， 具体 包括基站 31和终端 32, 其中：
基站 31用于通过信令通知终端切换到增强型下行控制信道模式，该信令用于通知该终 端工作在增强型下行控制信道模式下时，在增强型下行控制信道对应的资源和下行控制信道 PDCCH的公共搜索空间 Common search space对应的资源检测控制信令， 在接收到该终端 的反馈消息之后， 通过增强型下行控制信道对应的资源和所述 Common search space对应的 资源向该终端传输控制信令，所述反馈消息用于通知基站，所述终端已切换至增强型下行控 制信道模式下；
终端 32用于接收基站传输的通知终端切换到增强型下行控制信道模式的信令、 控制信 令并向所述基站返回反馈消息。
本实施例中的基站与实施例二中的基站可以具有相同的结构，且各功能单元可以执行相 应的功能，本实施例中的终端与实施例三中的终端可以具有相同的结构，且各功能单元可以 执行相应的功能。
综上所述，本发明实施例提供的一种控制信令传输系统不仅可以通过定义在各种状态下 向终端传输控制信令方法，解决由于不确定终端的工作模式导致的模糊期问题，还可以避免 对 PDCCH和 E-PDCCH的搜索空间进行盲检测， 降低 UE的检测复杂度， 从而降低设备成 本。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。 因此， 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实施例的 形式。 而且，本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机可用存储 介盾 (包括但不限于磁盘存储器、 CD-ROM、 光学存储器等）上实施的计算机程序产品的形 式。
本发明是参照根据本发明实施例的方法、 设备（系统）、 和计算机程序产品的流程图和
/或方框图来描述的。应理解可由计算机程序指令实现流程图和 /或方框图中的每一流程和 /或方框、以及流程图和 /或方框图中的流程和 /或方框的结合。可提供这些计算机程序指 令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一 个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流 程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式 工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的 制造品，该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中 指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或 其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编 程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个方框或 多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例， 但本领域内的技术人员一旦得知了基本创造性概 念， 则可对这些实施例作出另外的变更和修改。 所以， 所附权利要求意欲解释为包括优选实 施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范 围。 这样， 倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内， 则 本发明也意图包含这些改动和变型在内。

Claims

1、 一种控制信令传输方法， 其特征在于， 所述方法包括：
基站通过信令通知终端切换到增强型下行控制信道模式， 该信令用于通知 该终端工作在增强型下行控制信道模式下时， 在增强型下行控制信道对应的资 源和下行控制信道 PDCCH的公共搜索空间 Common search space对应的资源检 测控制信令；
基站在接收到该终端的反馈消息之后， 通过增强型下行控制信道对应的资 源和所述 Common search space对应的资源向该终端传输控制信令；
其中， 所述反馈消息用于通知基站， 所述终端已切换至增强型下行控制信 道模式下。
2、 如权利要求 1所述的方法， 其特征在于，
基站通过信令通知终端切换到增强型下行控制信道模式， 具体包括： 基站通过第一无线资源控制协议 RRC信令通知终端切换到增强型下行控 制信道模式；
基站接收该终端的反馈消息， 具体包括： 基站接收该终端的第一 RRC反 馈消息。
3、 如权利要求 2所述的方法， 其特征在于， 所述方法还包括：
基站通过第一 RRC信令通知该终端切换到增强型下行控制信道模式之后， 接收该终端的第一 RRC反馈消息之前， 基站通过所述 Common search space对 应的资源向该终端传输控制信令。
4、 如权利要求 1~3任一所述的方法， 其特征在于， 所述方法还包括： 基站通过第二 RRC信令通知该终端从增强型下行控制信道模式切换到下 行控制信道模式之后， 接收该终端的第二 RRC反馈消息之前， 基站通过所述 Common search space对应的资源向该终端传输控制信令；
所述第二 RRC反馈消息用于通知基站， 所述终端已切换至下行控制信道 模式下。
5、 如权利要求 1所述的方法， 其特征在于， 所述方法还包括： 基站通过切换指令通知终端从当前小区切换到邻小区之后， 确定终端切换 到邻小区之前， 基站通过所述 Common search space对应的资源向该终端传输 控制信令；
在确定终端切换到邻小区之后， 基站判断该终端切换之前对应的增强型下 行控制信道的参数配置是否可以使用， 若可以使用， 基站通过增强型下行控制 信道对应的资源和所述 Common search space对应的资源向该终端传输控制信 令；否则，基站通过高层指令通知终端更新增强型下行控制信道中的参数配置。
6、 如权利要求 5所述的方法， 其特征在于， 所述方法还包括：
基站通过高层指令通知终端更新增强型下行控制信道中的参数配置之后， 接收该终端的高层指令反馈消息之前， 基站通过所述 Common search space对 应的资源向该终端传输控制信令；
接收该终端的高层指令反馈消息之后， 基站按照更新后的参数配置向该终 端传输控制信令；
所述高层指令反馈消息用于通知基站， 终端已经完成所述参数配置的更 新。
7、 一种基站， 其特征在于， 所述基站包括：
第一发送模块， 用于通过信令通知终端切换到增强型下行控制信道模式， 该信令用于通知该终端工作在增强型下行控制信道模式下时， 在增强型下行控 制信道对应的资源和下行控制信道 PDCCH 的公共搜索空间 Common search space对应的资源检测控制信令；
接收模块， 用于接收该终端的反馈消息， 所述反馈消息用于通知基站， 所 述终端已切换至增强型下行控制信道模式下；
信令传输模块， 用于接收模块接收到所述反馈消息之后， 通过增强型下行 控制信道对应的资源和所述 Common search space对应的资源向该终端传输控 制信令。
8、 如权利要求 7所述的基站， 其特征在于， 第一发送模块， 具体用于通过第一无线资源控制协议 RRC信令通知终端 切换到增强型下行控制信道模式；
接收模块， 具体用于接收该终端的第一 RRC反馈消息。
9、 如权利要求 8所述的基站， 其特征在于，
所述信令传输模块， 还用于在第一发送模块通知该终端切换到增强型下行 控制信道模式之后， 接收模块接收到该终端的第一 RRC反馈消息之前， 通过 所述 Common search space对应的资源向该终端传输控制信令。
10、 如权利要求 7~9任一所述的基站， 其特征在于，
所述第一发送模块， 还用于通过第二 RRC信令通知该终端从增强型下行 控制信道模式切换到下行控制信道模式；
所述接收模块， 还用于接收该终端的第二 RRC反馈消息， 所述第二 RRC 反馈消息用于通知基站， 所述终端已切换至下行控制信道模式下；
所述信令传输模块， 还用于在第一发送模块通知该终端从增强型下行控制 信道模式切换到下行控制信道模式之后， 接收模块接收到该终端的第二 RRC 反馈消息之前， 通过所述 Common search space对应的资源向该终端传输控制 信令。
11、 如权利要求 7所述的基站， 其特征在于， 所述基站还包括第二发送模 块、 确定模块和第三发送模块， 其中：
第二发送模块， 用于通过切换指令通知终端从当前小区切换到邻小区； 确定模块， 用于确定终端是否已切换到邻小区；
所述信令传输模块， 具体用于在第二发送模块通知终端从当前小区切换到 邻小区之后，确定模块确定终端已切换到邻小区之前，通过所述 Common search space对应的资源向该终端传输控制信令， 以及在确定模块确定终端已切换到 邻小区之后， 判断该终端切换之前对应的增强型下行控制信道的参数配置是否 可以使用， 若可以使用， 通过增强型下行控制信道对应的资源和所述 Common search space对应的资源向该终端传输控制信令， 若不可以使用， 触发第三发送 模块； 第三发送模块， 用于通过高层指令通知终端更新增强型下行控制信道中的 参数配置。
12、 如权利要求 7或 11所述的基站， 其特征在于，
所述接收模块， 还用于接收该终端的高层指令反馈消息， 所述高层指令反 馈消息用于通知基站， 终端已经完成所述参数配置的更新；
所述信令传输模块， 还用于在所述基站包括的第三发送模块通过高层指令 通知终端更新增强型下行控制信道中的参数配置之后， 接收模块接收到该终端 的高层指令反馈消息之前， 通过所述 Common search space对应的资源向该终 端传输控制信令， 以及在接收模块接收到该终端的高层指令反馈消息之后， 按 照更新后的参数配置向该终端传输控制信令。
13、 一种终端， 其特征在于， 所述终端包括：
第一接收模块， 用于接收基站通知终端切换到增强型下行控制信道模式的 信令， 该信令用于通知该终端工作在增强型下行控制信道模式下时， 在增强型 下行控制信道对应的资源和下行控制信道 PDCCH 的公共搜索空间 Common search space对应的资源检测控制信令；
第一发送模块， 用于向所述基站发送反馈消息， 所述反馈消息用于通知基 站， 所述终端已切换至增强型下行控制信道模式下；
第二接收模块， 用于接收基站通过增强型下行控制信道对应的资源和下行 控制信道 PDCCH的公共搜索空间 Common search space对应的资源传输的控制 信令。
14、 如权利要求 13所述的终端， 其特征在于，
第一接收模块， 具体用于接收基站通知终端切换到增强型下行控制信道模 式的第一无线资源控制协议 RRC信令；
第一发送模块， 具体用于向所述基站发送第一 RRC反馈消息。
15、 如权利要求 13所述的终端， 其特征在于，
第二接收模块， 还用于接收基站通过所述 Common search space对应的资 源向该终端传输控制信令。
16、 如权利要求 13~15任一所述的终端， 其特征在于，
所述第一接收模块， 还用于接收基站通知该终端从增强型下行控制信道模 式切换到下行控制信道模式的第二 RRC信令；
所述第一发送模块， 用于向所述基站发送第二 RRC反馈消息， 所述第二 RRC反馈消息用于通知基站， 所述终端已切换至下行控制信道模式下。
17、 如权利要求 13所述的终端， 其特征在于， 所述终端还包括： 第三接收模块， 用于接收基站通知终端从当前小区切换到邻小区的切换指 令；
第四接收模块， 用于接收基站通知终端更新增强型下行控制信道中的参数 配置的高层指令。
18、 如权利要求 17所述的终端， 其特征在于， 所述终端还包括： 第二发送模块， 用于向所述终端发送高层指令反馈消息， 所述高层指令反 馈消息用于通知基站， 终端已经完成所述参数配置的更新；
第二接收模块， 具体用于接收基站按照更新后的参数配置传输的控制信 令。
19、 一种控制信令传输系统， 其特征在于， 所述系统包括基站和终端， 其 中：
基站， 用于通过信令通知终端切换到增强型下行控制信道模式， 该信令用 于通知该终端工作在增强型下行控制信道模式下时， 在增强型下行控制信道对 应的资源和下行控制信道 PDCCH的公共搜索空间 Common search space对应的 资源检测控制信令， 在接收到该终端的反馈消息之后， 通过增强型下行控制信 道对应的资源和所述 Common search space对应的资源向该终端传输控制信令， 所述反馈消息用于通知基站， 所述终端已切换至增强型下行控制信道模式下； 终端， 用于接收基站传输的通知终端切换到增强型下行控制信道模式的信 令、 控制信令并向所述基站返回反馈消息。
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