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WO2010083714A1 - Method and system for sending down control information from base station to relay station and transmitting the cpntrol information - Google Patents

Method and system for sending down control information from base station to relay station and transmitting the cpntrol information Download PDF

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Publication number
WO2010083714A1
WO2010083714A1 PCT/CN2009/076088 CN2009076088W WO2010083714A1 WO 2010083714 A1 WO2010083714 A1 WO 2010083714A1 CN 2009076088 W CN2009076088 W CN 2009076088W WO 2010083714 A1 WO2010083714 A1 WO 2010083714A1
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WO
WIPO (PCT)
Prior art keywords
control information
base station
relay station
information
station
Prior art date
Application number
PCT/CN2009/076088
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French (fr)
Chinese (zh)
Inventor
毕峰
袁明
梁枫
杨瑾
吴栓栓
Original Assignee
中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2010083714A1 publication Critical patent/WO2010083714A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603Arrangements for wireless physical layer control
    • H04B7/2606Arrangements for base station coverage control, e.g. by using relays in tunnels
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems
    • H04W84/047Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the present invention relates to mobile communication technologies, and in particular, to a method and system for a base station to send control information and transmit control information to a relay station.
  • control channel and the traffic channel can be multiplexed in the time direction or in the frequency direction, that is, Use TDM (Time Division Multiplex) and FDM (Frequency Division Multiplex).
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced, Advanced Long Term Evolution
  • IMT-Advanced International Mobile Telecommunications-Advanced, Advanced International Mobile Telecommunications
  • the control channel in order to save power to the UE (User Equipment) end, the control channel usually adopts the TDM mode, that is, the control channel and the traffic channel are separated in time, for example, 14 in one subframe. OFDM symbols, the first 3 OFDM symbols are used as control channels, and the last 11 OFDM symbols are used as traffic channels.
  • the control channel of the current LTE system is taken as an example for description.
  • the downlink control information mainly includes the following contents:
  • CCFI Control Channel Format Indication
  • UpLink grant Upstream scheduling 4 is authorized
  • HARQ Hybrid Auto Repeat reQuest
  • CCFI is used to indicate that several OFDM symbols are used to carry control information, which is related to CCE (Control) Channel Elements, control channel elements) independent; HI is also independent of CCE;
  • CCEs One or more consecutive subcarriers in the frequency domain are called CCEs, and the CCEs may include DL grants and UL grants;
  • Each control channel is composed of one or more CCE combinations
  • Each UE can monitor a series of candidate control channels
  • the number of candidate control channels is equal to the maximum number of blind detections
  • the number of candidate control channels is greater than the number of CCEs
  • the transmitting and receiving ends specify several combinations, for example, only 1, 2, 4, and 8 CCEs are combined together as a candidate control channel;
  • channel control is performed on each UE's control information, QPSK modulation is performed, then CCE is mapped to RE (Resource Element), and IFFT (Inverse Fast Fourier Transform) is completed. , Fast Fourier Transform) is transformed and transmitted. It is assumed that the control channel is composed of 32 CCEs at this time, and the receiving UE performs blind detection from a single CCE after performing FFT (Fast Fourier Transform) transformation.
  • FFT Fast Fourier Transform
  • the blind detection is performed on CCE0 and CCE1 CCE31 respectively. If the UE-ID matching the self is not monitored, the combination of two CCEs is blindly detected (ie, [CCE0 CCE1], [CCE2 CCE3] respectively. [CCE30 CCE31] for blind detection), and so on. If the UE-ID that matches itself is not monitored during the entire blind detection process, it means that there is no control information of its own, and the UE will switch to the sleep mode; if it listens to the UE that matches itself - The ID, according to the control information, demodulates the corresponding service information.
  • the technical problem to be solved by the present invention is to provide a method for a base station to send control information to a relay station and a method and system for transmitting control information to implement transmission of control information between a base station and a relay station link.
  • the present invention provides a method for a base station to send control information to a relay station, including:
  • the base station and the relay station pre-approve the number, location, and allocation manner of the occupied PDSCH resource blocks, or the base station notifies the number, location, and allocation manner of the PDSCH resource blocks occupied by the relay station.
  • the above method may also have the following features:
  • a part of the control information is sent to the relay station in the coverage area, and another part of the control information is sent through the physical downlink control channel PDCCH.
  • the above method may also have the following features:
  • the control information includes: any one or any combination of uplink scheduling grant control information under the relay station, base station notification relay station available resource control information, and base station notification relay station belonging terminal control information.
  • the above method may also have the following features:
  • the method for the base station to notify the number of the PDSCH resource blocks occupied by the relay station, the location, and the allocation mode information is: the base station carries the foregoing information through the PDCCH or one or more PDSCHs that are agreed with the relay station through the PDCCH.
  • the resource block carries the above information.
  • the present invention further provides a method for transmitting control information, including: the base station uses a physical downlink shared channel PDSCH resource block in a frequency division multiplexing manner.
  • the relay station in its coverage issues control information;
  • the base station and the relay station pre-agreed the attribute information of the occupied PDSCH resource block, or the base station sends the attribute information of the occupied PDSCH resource block to the relay station, where the occupied PDSCH resource block is
  • the attribute information includes the number, location, and allocation of the resource blocks;
  • the relay station listens to the control information on the occupied PDSCH resource block according to the pre-agreed or received attribute information, and performs an operation according to the monitored control information.
  • the above method may also have the following features:
  • a part of the control information is sent to the relay station in the coverage area, and another part of the control information is sent through the physical downlink control channel PDCCH.
  • the above method may also have the following features:
  • the sending, by the base station, the attribute information to the relay station is: the base station carries the attribute information by using the PDCCH to carry the attribute information or by using one or more PDSCH resource blocks that are agreed with the relay station.
  • the above method may also have the following features:
  • the control information includes: an uplink scheduling grant control information under the relay station, a base station notifying the relay station of the available resource control information, and the base station notifying the relay station of the terminal control information, or any combination thereof;
  • the operation of the relay station according to the monitored control information refers to: if the relay station monitors the uplink scheduling grant control information of the relay station, demodulating the service information corresponding to the uplink scheduling grant control information of the relay station; if the relay station Monitoring the base station to notify the relay station that the resource control information is available, and performing resource allocation according to the control information; if the base station is notified to notify the relay station of the terminal control information, the base station is notified to the relay station that the resource control information is forwarded to the The terminal to which the relay station belongs.
  • the present invention also provides a system for transmitting control information, including a base station. And the relay stations within its coverage,
  • the base station includes a resource allocation module and an information sending module, where the relay station includes an information receiving module and an execution module;
  • the resource allocation module is configured to allocate, according to a manner agreed by the base station and the relay station, a physical downlink shared channel (PDSCH) resource block, or a control to be sent to the relay station, to be sent to the relay station.
  • the information is allocated to the physical downlink shared channel PDSCH resource block, and the attribute information of the occupied PDSCH resource block is sent to the information sending module, where the attribute information of the occupied PDSCH resource block includes the number and location of the PDSCH resource block.
  • PDSCH physical downlink shared channel
  • the information sending module is configured to adopt the frequency division multiplexing manner by using the allocated
  • the information receiving module is configured to receive control information sent by the base station to the relay station in the PDSCH resource block according to the attribute information that is pre-agreed or received, and send the control information to the execution module;
  • the execution module is configured to perform an operation in accordance with the control information.
  • the control information includes: an uplink scheduling grant control information under the relay station, a base station notifying the relay station of the available resource control information, and the base station notifying the relay station of the terminal control information, or any combination thereof;
  • the execution module is further configured to: when listening to the uplink scheduling grant control information of the relay station, demodulate the service information corresponding to the uplink scheduling grant control information of the relay station; and when the base station is notified to notify the relay station that the resource control information is available And, according to the base station, the relay station is configured to use the resource control information to perform resource allocation; and when the base station is notified of the terminal control information to which the relay station belongs, the base station notifies the terminal control information to which the relay station belongs to the terminal to which the relay station belongs.
  • the method of the present invention has a simple control channel structure and can be suitably applied to a base station to relay station link, which ensures backward compatibility (compatible with LTE systems) and also obtains frequency. Rate diversity gain.
  • FIG. 1 is a schematic structural diagram of a control channel according to an embodiment of the present invention.
  • FIG. 2 is a structural diagram of a system for transmitting control information according to an embodiment of the present invention.
  • the method for the base station to send the control information to the relay station includes: the base station uses the PDSCH (Physical Downlink Shared Channel) resource block to carry the control information sent to the relay station in the coverage area by using the frequency division multiplexing mode.
  • the attribute information of the occupied PDSCH resource block may be pre-approved by the base station and each of the foregoing relay stations or notified by the base station to the relay station.
  • the attribute information of the occupied PDSCH resource block includes the quantity, location, and allocation mode information of the PDSCH resource block, and the allocation manner includes centralized (the occupied resource blocks are continuous) and distributed (occupied resource blocks). Discontinuous) .
  • the method for transmitting control information between the base station and the relay station includes: in addition to the foregoing steps, the relay station monitors the control information on the corresponding PDSCH resource block according to the pre-agreed or received attribute information, and performs corresponding according to the monitored control information. Operation.
  • the control information sent by the base station to the relay station in the coverage area may be carried by the PDSCH resource block, or partially carried by the PDSCH resource block, and the other part is carried by the PDCCH (Physical Downlink Control CHannel).
  • the PDSCH resource block can simultaneously carry control information of multiple relay stations; when the base station notifies the number, location and allocation mode of the resource blocks occupied by the relay station, the above parameters can be changed according to the overhead of the specific control information.
  • the control information may include: any one or any combination of the uplink scheduling grant control information under the relay station, the base station notifying the relay station of the resource control information, and the base station notifying the relay station of the terminal control information. If the relay station monitors the uplink scheduling grant control information under the relay station, demodulating the corresponding service information according to the control information; if the base station is notified, the relay station can use the resource control signal The information is allocated according to the control information. If the base station is notified of the terminal control information of the relay station, the control information is forwarded to the corresponding terminal.
  • the foregoing method for the base station notifying the number, location, and allocation mode of the resource blocks occupied by the relay station may be: the base station carries the foregoing attribute information through the PDCCH or one or more PDSCHs that are agreed with the relay station through the PDCCH.
  • the resource block carries the above attribute information.
  • the base station when the PDSCH resource block is used to carry control information, the base station no longer allocates traffic to the resource block to prevent mutual interference between the control channel and the traffic channel.
  • the system for transmitting control information includes a base station and a relay station in its coverage area, the base station includes a resource allocation module and an information sending module, and the relay station includes an information receiving module and an execution module;
  • the resource allocation module is configured to allocate a PDSCH resource block to the control information to be sent to the relay station according to a manner agreed by the base station and the foregoing relay station, or allocate a PDSCH resource block to the control information to be sent to the relay station, and allocate the PDSCH resource block
  • the attribute information of the occupied PDSCH resource block is sent to the information sending module, where the attribute information of the occupied PDSCH resource block includes the quantity, location, and allocation manner of the resource block;
  • the information sending module is configured to send the control information to the relay station in the coverage area by using the allocated PDSCH resource block by using the allocated PDSCH resource block, and is also used for the attribute of the received occupied PDSCH resource block.
  • Information is sent to the relay station;
  • the information receiving module is configured to receive control information sent by the base station to the corresponding module in the corresponding PDSCH resource block according to the attribute information that is pre-agreed or received, and send the control information to the execution module;
  • the execution module is configured to perform a corresponding operation according to the control information.
  • the RBs are not scheduled, and are invisible to the ordinary UEs. That is, the UEs consider that they are not scheduled on the RBs according to the control information, thus ensuring backward compatibility (compatible with the LTE system), and the FDM application also obtains the frequency diversity gain.
  • backward compatibility compatible with the LTE system
  • the base station sends control information to multiple UEs in its coverage area through the first 3 OFDM symbols of the subframe, and transmits control information to the relay station in its coverage through the PDSCH resource block, and the one agreed by the base station and the relay station Or multiple PDSCH resource blocks carry the number, location, and allocation mode information of the occupied PDSCH resource blocks.
  • the relay station After the relay station monitors the quantity, location, and allocation mode information of the occupied PDSCH resource block on the one or more PDSCH resource blocks that the base station and the base station have agreed upon, the relay station monitors the control information carried on the corresponding PDSCH resource block according to the information. If the uplink scheduling grant control information is monitored on the corresponding PDSCH resource block, the relay station demodulates the corresponding service information according to the control information; if the base station is notified to notify the relay station that the resource control information is available, the relay station according to the The control information is used for resource allocation; if the base station is notified of the terminal control information to which the relay station belongs, the relay station forwards the control information to the corresponding terminal.
  • the base station sends control information to the relay station in its coverage area through the PDSCH resource block, and transmits the control information and the number of the occupied PDSCH resource blocks to the plurality of UEs in the coverage area by using the PDCCH of the first three OFDM symbols of the subframe, Location and distribution method information.
  • the relay station After monitoring the number, location, and allocation mode information of the occupied PDSCH resource blocks on the PDCCH, the relay station monitors the control information carried on the corresponding PDSCH resource block according to the information. If the uplink scheduling grant control information is monitored by the relay station, the relay station demodulates the corresponding service information according to the control information; if the base station is notified to notify the relay station that the resource control information is available, the resource allocation is performed according to the control information; if the base station is monitored When the terminal control information of the relay station is notified, the control information is forwarded to the corresponding terminal.
  • the base station sends the control information and the uplink scheduling grant control information of the relay station to the multiple UEs in the coverage area through the first three OFDM symbols of the subframe, that is, the PDCCH, and the other control information that needs to be sent to the relay station is carried by the PDSCH resource block.
  • the allocation and allocation mode information is carried by one or more PDSCH resource blocks agreed by the base station and the relay station.
  • the relay station After receiving the uplink scheduling grant control information of the relay station on the PDCCH, the relay station demodulates the corresponding service information according to the control information; and monitors the number of occupied PDSCH resource blocks on one or more PDSCH resource blocks that are agreed with the base station. After the location information and the allocation mode information, the control information carried on the corresponding PDSCH resource block is monitored according to the information. If the base station is notified that the relay station can utilize the resource control information, the relay station performs resource allocation according to the control information; if the base station is notified of the terminal control information to which the relay station belongs, the relay station forwards the control information to the corresponding terminal.
  • the base station sends control information, the uplink scheduling grant control information of the relay station, and the number, location, and allocation mode information of the occupied PDSCH resource blocks to the multiple UEs in the coverage area through the first three OFDM symbols of the subframe, that is, the PDCCH.
  • Other control information sent to the relay station is carried by the above occupied PDSCH resource block.
  • the relay station After receiving the uplink scheduling grant control information of the relay station, the relay station demodulates the corresponding service information according to the control information; after listening to the number, location, and allocation mode information of the occupied PDSCH resource block, the relay station monitors the corresponding PDSCH resource block. Control information carried on. If the base station is notified that the relay station can utilize the resource control information, the relay station performs resource allocation according to the control information; if the base station is notified to notify the relay station of the terminal control information, the relay station forwards the control information to the corresponding terminal.
  • the technical solution for the base station to send control information and transmission control information to the relay station does not change the original physical downlink control channel PDCCH structure, and the resource block RB is adopted.
  • the RBs are not scheduled again, and are invisible to ordinary UEs, that is, the UEs consider that they are not scheduled on the RBs according to the control information, thus ensuring backward compatibility (compatible with the LTE system).
  • the application of FDM also obtained the frequency diversity gain.

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

Abstract

A method and system for sending down control information from base station to relay station and transmitting the control information are provided in the present invention. The method for sending down control information includes: the control information is sent down from base station to relay station in the covered range of the base station through Physical Downlink Shared Channel PDSCH resources blocks by Frequency Division Multiplexing, and the base station negotiates with the relay station about the attribute information of the occupied PDSCH resources blocks in advance, or the base station informs the relay station about the attribute information of the occupied PDSCH resources blocks. The method for transmitting control information includes: the said step of sending down the control information, and the relay station monitors the control information on the occupied PDSCH resources blocks based on the attribute information of the occupied PDSCH resources blocks negotiated before or received, and performs the operation based on the monitored control information. The system of transmitting the control information includes a resources allocation module, an information transmitting module, an information receiving module and a performing module. The modules accomplish the corresponding functions of the said method.

Description

基站向中继站下发控制信息及传输控制信息的方法及系统 技术领域  Method and system for transmitting control information and transmission control information to a relay station by a base station
本发明涉及移动通信技术, 尤其涉及一种基站向中继站下发控制信息及 传输控制信息的方法及系统。  The present invention relates to mobile communication technologies, and in particular, to a method and system for a base station to send control information and transmit control information to a relay station.
背景技术 Background technique
在 OFDM ( Orthogonal Frequency Division Multiplexing, 正交频分复用 ) 系统中, 由于具有时频两维的数据形式, 所以可以在时间方向上或在频率方 向上对控制信道及业务信道进行复用 ,即釆用 TDM ( Time Division Multiplex, 时分复用)方式和 FDM ( Frequency Division Multiplex, 频分复用)方式。  In an OFDM (Orthogonal Frequency Division Multiplexing) system, since there are two-dimensional data formats of time-frequency, the control channel and the traffic channel can be multiplexed in the time direction or in the frequency direction, that is, Use TDM (Time Division Multiplex) and FDM (Frequency Division Multiplex).
LTE ( Long Term Evolution,长期演进 )系统、 LTE-A ( Long Term Evolution -Advanced , 高级长期演进) 系统、 IMT-Advanced ( International Mobile Telecommunications-Advanced , 高级国际移动通信) 系统都是以 OFDM技术 为基础的。 在 OFDM系统中, 为了使 UE ( User Equipment, 用户设备)端省 电, 控制信道通常釆用 TDM方式, 也就是说控制信道和业务信道在时间上 是分开的, 例如在一个子帧内有 14个 OFDM符号, 前 3个 OFDM符号作为 控制信道, 而后 11个 OFDM符号作为业务信道。  LTE (Long Term Evolution) system, LTE-A (Long Term Evolution-Advanced, Advanced Long Term Evolution) system, IMT-Advanced (International Mobile Telecommunications-Advanced, Advanced International Mobile Telecommunications) system are based on OFDM technology. of. In the OFDM system, in order to save power to the UE (User Equipment) end, the control channel usually adopts the TDM mode, that is, the control channel and the traffic channel are separated in time, for example, 14 in one subframe. OFDM symbols, the first 3 OFDM symbols are used as control channels, and the last 11 OFDM symbols are used as traffic channels.
首先以目前 LTE系统的控制信道为例进行说明。在 LTE系统中, 下行控 制信息主要包括以下内容:  First, the control channel of the current LTE system is taken as an example for description. In the LTE system, the downlink control information mainly includes the following contents:
1 ) CCFI ( Control Channel Format Indication ) : 控制信道格式指示; 1) CCFI (Control Channel Format Indication): control channel format indication;
2 ) DL grant ( Downlink grant ) : 下行调度 4受权; 2) DL grant (Downlink grant): Downstream scheduling 4 is authorized;
3 ) UL grant ( UpLink grant ) : 上行调度 4受权;  3) UL grant (UpLink grant): Upstream scheduling 4 is authorized;
4 ) HI: HARQ ( Hybrid Auto Repeat reQuest, 混合自动重传请求)指示; 可以看出控制信道是由不同的组成部分构成的, 每个部分都有其特定的 功能。 为了描述方便, 下面定义几个术语及约定。  4) HI: HARQ (Hybrid Auto Repeat reQuest) indication; it can be seen that the control channel is composed of different components, each of which has its specific function. For convenience of description, several terms and conventions are defined below.
1 ) CCFI用于指示几个 OFDM符号用于携带控制信息,其与 CCE( Control Channel Elements, 控制信道元素)独立; HI也与 CCE独立; 1) CCFI is used to indicate that several OFDM symbols are used to carry control information, which is related to CCE (Control) Channel Elements, control channel elements) independent; HI is also independent of CCE;
2 )在频域上连续的一个或多个子载波被称为 CCE, CCE中可以包括 DL grant和 UL grant;  2) One or more consecutive subcarriers in the frequency domain are called CCEs, and the CCEs may include DL grants and UL grants;
3 )所有的 CCE都釆用 QPSK ( Quaternary Phase Shift Keying, 正交相移 键控)调制方式;  3) All CCEs use QPSK (Quaternary Phase Shift Keying) modulation;
4 )每个控制信道是由一个或者多个 CCE组合构成的;  4) Each control channel is composed of one or more CCE combinations;
5 )每个 UE能够监测一系列侯选控制信道;  5) Each UE can monitor a series of candidate control channels;
6 )侯选控制信道的数目等于盲检测的最大次数;  6) the number of candidate control channels is equal to the maximum number of blind detections;
7 )侯选控制信道的数目大于 CCE的数目;  7) the number of candidate control channels is greater than the number of CCEs;
8 )收发两端规定好几种组合, 例如只有 1、 2、 4、 8个 CCE组合在一起 作为侯选控制信道;  8) The transmitting and receiving ends specify several combinations, for example, only 1, 2, 4, and 8 CCEs are combined together as a candidate control channel;
9 ) 1、 2、 4、 8组合分别对应不同的编码速率。  9) The 1, 2, 4, and 8 combinations correspond to different coding rates.
在 Node-B (节点 B )端, 分别对每个 UE的控制信息进行信道编码后进 行 QPSK调制, 然后再将 CCE映射到 RE ( Resource Element, 资源单元), 且在完成 IFFT ( Inverse Fast Fourier Transform, 快速傅立叶逆变换)变换后发 射出去。 假设此时控制信道由 32个 CCE构成, 接收端 UE在进行 FFT ( Fast Fourier Transform, 快速傅立叶变换) 变换后, 从单个 CCE开始进行盲检测 At the Node-B (Node B) end, channel control is performed on each UE's control information, QPSK modulation is performed, then CCE is mapped to RE (Resource Element), and IFFT (Inverse Fast Fourier Transform) is completed. , Fast Fourier Transform) is transformed and transmitted. It is assumed that the control channel is composed of 32 CCEs at this time, and the receiving UE performs blind detection from a single CCE after performing FFT (Fast Fourier Transform) transformation.
(即分别对 CCE0、 CCE1 CCE31 进行盲检测), 如果没有监听到和自 己相匹配的 UE— ID, 则对包含 2个 CCE的组合进行盲检测(即分别对 [CCE0 CCE1]、 [CCE2 CCE3] [CCE30 CCE31]进行盲检测), 依次类推。 如果 在整个盲检测过程中都没有监听到和自己相匹配的 UE— ID, 则说明此时没有 属于自己的控制信息下达, 该 UE会切换到睡眠模式; 如果监听到和自己相 匹配的 UE— ID, 则按照控制信息解调相对应的业务信息。 (The blind detection is performed on CCE0 and CCE1 CCE31 respectively). If the UE-ID matching the self is not monitored, the combination of two CCEs is blindly detected (ie, [CCE0 CCE1], [CCE2 CCE3] respectively. [CCE30 CCE31] for blind detection), and so on. If the UE-ID that matches itself is not monitored during the entire blind detection process, it means that there is no control information of its own, and the UE will switch to the sleep mode; if it listens to the UE that matches itself - The ID, according to the control information, demodulates the corresponding service information.
目前,对于控制信道的研究是一个热点。但是, 当 OFDM系统(如 LTE-A 系统) 中存在 RS ( Relay Station, 中继站) 时, 对下行控制信道的结构研究 较少, 目前的系统都是釆用 TDM方式, 但釆用 TDM方式时需对目前系统的 控制信道进行^^改, 如增加新的控制信道格式等。 发明内容 At present, research on control channels is a hot topic. However, when there is an RS (Relay Station) in an OFDM system (such as an LTE-A system), there are few studies on the structure of the downlink control channel. The current system uses the TDM method, but the TDM method is required. The current control channel of the system is modified, such as adding a new control channel format. Summary of the invention
本发明所要解决的技术问题是提供一种基站向中继站下发控制信息的方 法及传输控制信息的方法及系统, 以实现基站到中继站链路间控制信息的传 输。  The technical problem to be solved by the present invention is to provide a method for a base station to send control information to a relay station and a method and system for transmitting control information to implement transmission of control information between a base station and a relay station link.
为解决上述问题,本发明提供了一种基站向中继站下发控制信息的方法, 其包括:  To solve the above problem, the present invention provides a method for a base station to send control information to a relay station, including:
所述基站釆用频分复用的方式通过物理下行共享信道 PDSCH 资源块向 其覆盖范围内的中继站下发控制信息; 以及  Transmitting, by the base station, the control information to the relay station in the coverage area by using the physical downlink shared channel PDSCH resource block in a frequency division multiplexing manner;
所述基站与所述中继站预先约定好被占用的 PDSCH 资源块的数量、 位 置和分配方式, 或所述基站通知所述中继站被占用的 PDSCH资源块的数量、 位置和分配方式。  And the base station and the relay station pre-approve the number, location, and allocation manner of the occupied PDSCH resource blocks, or the base station notifies the number, location, and allocation manner of the PDSCH resource blocks occupied by the relay station.
进一步地, 上述方法还可具有以下特征:  Further, the above method may also have the following features:
所述基站通过 PDSCH 资源块向其覆盖范围内的中继站下发控制信息是 指:所述基站通过所述 PDSCH资源块向其覆盖范围内的中继站下发全部控制 信息, 或通过所述 PDSCH 资源块向其覆盖范围内的中继站下发部分控制信 息, 而另一部分控制信息通过物理下行控制信道 PDCCH下发。  The transmitting, by the base station, the control information to the relay station in the coverage area by using the PDSCH resource block, the base station transmitting, by using the PDSCH resource block, all the control information to the relay station in its coverage, or by using the PDSCH resource block. A part of the control information is sent to the relay station in the coverage area, and another part of the control information is sent through the physical downlink control channel PDCCH.
进一步地, 上述方法还可具有以下特征:  Further, the above method may also have the following features:
所述控制信息包括: 中继站下上行调度授权控制信息、 基站通知中继站 可利用资源控制信息及基站通知中继站所属终端控制信息中的任意一个或其 任意组合。  The control information includes: any one or any combination of uplink scheduling grant control information under the relay station, base station notification relay station available resource control information, and base station notification relay station belonging terminal control information.
进一步地, 上述方法还可具有以下特征:  Further, the above method may also have the following features:
所述基站通知所述中继站被占用的 PDSCH 资源块的数量、 位置和分配 方式信息釆用的方法为: 所述基站通过所述 PDCCH承载上述各信息或通过 其与中继站约定的一个或多个 PDSCH资源块承载上述各信息。  The method for the base station to notify the number of the PDSCH resource blocks occupied by the relay station, the location, and the allocation mode information is: the base station carries the foregoing information through the PDCCH or one or more PDSCHs that are agreed with the relay station through the PDCCH. The resource block carries the above information.
为解决上述问题, 本发明还提供了一种传输控制信息的方法, 其包括: 所述基站釆用频分复用的方式通过物理下行共享信道 PDSCH 资源块向 其覆盖范围内的中继站下发控制信息; In order to solve the above problem, the present invention further provides a method for transmitting control information, including: the base station uses a physical downlink shared channel PDSCH resource block in a frequency division multiplexing manner. The relay station in its coverage issues control information;
所述基站与所述中继站预先约定好被占用的 PDSCH资源块的属性信息, 或所述基站向所述中继站发送被占用的 PDSCH资源块的属性信息,其中,所 述被占用的 PDSCH 资源块的属性信息包括该资源块的数量、 位置和分配方 式; 以及  And the base station and the relay station pre-agreed the attribute information of the occupied PDSCH resource block, or the base station sends the attribute information of the occupied PDSCH resource block to the relay station, where the occupied PDSCH resource block is The attribute information includes the number, location, and allocation of the resource blocks;
所述中继站根据预先约定或接收到的属性信息在所述被占用的 PDSCH 资源块上监听控制信息, 并根据监听到的控制信息执行操作。  The relay station listens to the control information on the occupied PDSCH resource block according to the pre-agreed or received attribute information, and performs an operation according to the monitored control information.
进一步地, 上述方法还可具有以下特征:  Further, the above method may also have the following features:
所述基站通过 PDSCH 资源块向其覆盖范围内的中继站下发控制信息是 指:所述基站通过所述 PDSCH资源块向其覆盖范围内的中继站下发全部控制 信息, 或通过所述 PDSCH 资源块向其覆盖范围内的中继站下发部分控制信 息, 而另一部分控制信息通过物理下行控制信道 PDCCH下发。  The transmitting, by the base station, the control information to the relay station in the coverage area by using the PDSCH resource block, the base station transmitting, by using the PDSCH resource block, all the control information to the relay station in its coverage, or by using the PDSCH resource block. A part of the control information is sent to the relay station in the coverage area, and another part of the control information is sent through the physical downlink control channel PDCCH.
进一步地, 上述方法还可具有以下特征:  Further, the above method may also have the following features:
所述基站向所述中继站发送所述属性信息是指: 所述基站通过所述 PDCCH承载所述属性信息或通过其与中继站约定的一个或多个 PDSCH资源 块承载所述属性信息。  The sending, by the base station, the attribute information to the relay station, is: the base station carries the attribute information by using the PDCCH to carry the attribute information or by using one or more PDSCH resource blocks that are agreed with the relay station.
进一步地, 上述方法还可具有以下特征:  Further, the above method may also have the following features:
所述控制信息包括: 中继站下上行调度授权控制信息、 基站通知中继站 可利用资源控制信息及基站通知中继站所属终端控制信息中的任意一个或其 任意组合;  The control information includes: an uplink scheduling grant control information under the relay station, a base station notifying the relay station of the available resource control information, and the base station notifying the relay station of the terminal control information, or any combination thereof;
所述中继站根据监听到的控制信息执行操作是指: 如果所述中继站监听 到所述中继站下上行调度授权控制信息, 则解调该中继站下上行调度授权控 制信息对应的业务信息; 如果所述中继站监听到所述基站通知中继站可利用 资源控制信息, 则根据该控制信息进行资源分配; 如果监听到所述基站通知 中继站所属终端控制信息, 则将该基站通知中继站可利用资源控制信息转发 给所述中继站所属的终端。  The operation of the relay station according to the monitored control information refers to: if the relay station monitors the uplink scheduling grant control information of the relay station, demodulating the service information corresponding to the uplink scheduling grant control information of the relay station; if the relay station Monitoring the base station to notify the relay station that the resource control information is available, and performing resource allocation according to the control information; if the base station is notified to notify the relay station of the terminal control information, the base station is notified to the relay station that the resource control information is forwarded to the The terminal to which the relay station belongs.
为解决上述问题, 本发明还提供了一种传输控制信息的系统, 包括基站 及其覆盖范围内的中继站, In order to solve the above problems, the present invention also provides a system for transmitting control information, including a base station. And the relay stations within its coverage,
所述基站中包括资源分配模块及信息发送模块, 所述中继站中包括信息 接收模块及执行模块;  The base station includes a resource allocation module and an information sending module, where the relay station includes an information receiving module and an execution module;
所述资源分配模块设置为根据所述基站与所述中继站约定好的方式为要 向所述中继站下发的控制信息分配物理下行共享信道 PDSCH资源块,或为要 向所述中继站下发的控制信息分配物理下行共享信道 PDSCH 资源块并将被 占用的 PDSCH资源块的属性信息发送给所述信息发送模块,其中,所述被占 用的 PDSCH资源块的属性信息包括该 PDSCH资源块的数量、位置和分配方 式;  The resource allocation module is configured to allocate, according to a manner agreed by the base station and the relay station, a physical downlink shared channel (PDSCH) resource block, or a control to be sent to the relay station, to be sent to the relay station. The information is allocated to the physical downlink shared channel PDSCH resource block, and the attribute information of the occupied PDSCH resource block is sent to the information sending module, where the attribute information of the occupied PDSCH resource block includes the number and location of the PDSCH resource block. And distribution method;
所述信息发送模块设置为釆用频分复用的方式通过所述分配好的 The information sending module is configured to adopt the frequency division multiplexing manner by using the allocated
PDSCH资源块向所述中继站下发所述控制信息,并将接收到的所述被占用的 PDSCH资源块的属性信息发送给所述中继站; Transmitting, by the PDSCH resource block, the control information to the relay station, and transmitting the received attribute information of the occupied PDSCH resource block to the relay station;
所述信息接收模块设置为根据预先约定或接收到的所述属性信息在所述 PDSCH 资源块接收所述基站向所述中继站下发的控制信息并发送给所述执 行模块;  The information receiving module is configured to receive control information sent by the base station to the relay station in the PDSCH resource block according to the attribute information that is pre-agreed or received, and send the control information to the execution module;
所述执行模块设置为根据所述控制信息执行操作。  The execution module is configured to perform an operation in accordance with the control information.
进一步地, 上述系统还可具有以下特征:  Further, the above system may also have the following features:
所述控制信息包括: 中继站下上行调度授权控制信息、 基站通知中继站 可利用资源控制信息及基站通知中继站所属终端控制信息中的任意一个或其 任意组合;  The control information includes: an uplink scheduling grant control information under the relay station, a base station notifying the relay station of the available resource control information, and the base station notifying the relay station of the terminal control information, or any combination thereof;
所述执行模块还设置为在监听到所述中继站下上行调度授权控制信息 时, 解调该中继站下上行调度授权控制信息对应的业务信息; 在监听到所述 基站通知中继站可利用资源控制信息时, 根据该基站通知中继站可利用资源 控制信息进行资源分配; 以及在监听到所述基站通知中继站所属终端控制信 息时, 将该基站通知中继站所属终端控制信息转发给所述中继站所属终端。  The execution module is further configured to: when listening to the uplink scheduling grant control information of the relay station, demodulate the service information corresponding to the uplink scheduling grant control information of the relay station; and when the base station is notified to notify the relay station that the resource control information is available And, according to the base station, the relay station is configured to use the resource control information to perform resource allocation; and when the base station is notified of the terminal control information to which the relay station belongs, the base station notifies the terminal control information to which the relay station belongs to the terminal to which the relay station belongs.
综上所述, 釆用本发明所述方法, 控制信道结构简单, 可以艮好地适用 于基站到中继站链路, 既保证了后向兼容性(兼容 LTE系统) , 也获得了频 率分集增益。 In summary, the method of the present invention has a simple control channel structure and can be suitably applied to a base station to relay station link, which ensures backward compatibility (compatible with LTE systems) and also obtains frequency. Rate diversity gain.
附图概述 BRIEF abstract
图 1为本发明实施例中控制信道结构示意图;  1 is a schematic structural diagram of a control channel according to an embodiment of the present invention;
图 2为本发明实施例中传输控制信息的系统结构图。  FIG. 2 is a structural diagram of a system for transmitting control information according to an embodiment of the present invention.
本发明的较佳实施方式 Preferred embodiment of the invention
下面将结合附图及实施例对本发明的技术方案进行更详细的说明。  The technical solution of the present invention will be described in more detail below with reference to the accompanying drawings and embodiments.
基站向中继站下发控制信息的方法, 包括: 基站釆用频分复用的方式以 PDSCH ( Physical Downlink Shared Channel , 物理下行共享信道) 资源块承载 向其覆盖范围内的中继站下发的控制信息,而被占用的 PDSCH资源块的属性 信息可由基站及上述各中继站预先约定好或由基站通知中继站。 其中, 被占 用的 PDSCH资源块的属性信息包括该 PDSCH资源块的数量、位置和分配方 式信息, 而分配方式包括集中式(被占用的资源块是连续的)和分布式(被 占用的资源块不连续) 。  The method for the base station to send the control information to the relay station includes: the base station uses the PDSCH (Physical Downlink Shared Channel) resource block to carry the control information sent to the relay station in the coverage area by using the frequency division multiplexing mode. The attribute information of the occupied PDSCH resource block may be pre-approved by the base station and each of the foregoing relay stations or notified by the base station to the relay station. The attribute information of the occupied PDSCH resource block includes the quantity, location, and allocation mode information of the PDSCH resource block, and the allocation manner includes centralized (the occupied resource blocks are continuous) and distributed (occupied resource blocks). Discontinuous) .
而基站与中继站间传输控制信息的方法, 除包括上述步骤外, 还包括: 中继站根据预先约定或接收到的属性信息在对应的 PDSCH 资源块上监听控 制信息, 并根据监听到的控制信息执行对应的操作。  The method for transmitting control information between the base station and the relay station includes: in addition to the foregoing steps, the relay station monitors the control information on the corresponding PDSCH resource block according to the pre-agreed or received attribute information, and performs corresponding according to the monitored control information. Operation.
如图 1 所示, 上述基站下发到其覆盖范围内中继站的控制信息可由 PDSCH资源块承载, 或者部分由 PDSCH资源块承载, 另一部分由 PDCCH ( Physical Downlink Control CHannel, 物理下行控制信道 )承载。 PDSCH资 源块中可同时承载多个中继站的控制信息; 当由基站通知中继站被占用的资 源块的数量、 位置和分配方式时, 上述各参数可根据具体的控制信息的开销 而改变。  As shown in FIG. 1 , the control information sent by the base station to the relay station in the coverage area may be carried by the PDSCH resource block, or partially carried by the PDSCH resource block, and the other part is carried by the PDCCH (Physical Downlink Control CHannel). The PDSCH resource block can simultaneously carry control information of multiple relay stations; when the base station notifies the number, location and allocation mode of the resource blocks occupied by the relay station, the above parameters can be changed according to the overhead of the specific control information.
控制信息中可包括: 中继站下上行调度授权控制信息、 基站通知中继站 可利用资源控制信息及基站通知中继站所属终端控制信息中的任意一个或其 任意组合。 如果中继站监听到中继站下上行调度授权控制信息, 则根据该控 制信息解调对应的业务信息; 如果监听到基站通知中继站可利用资源控制信 息, 则根据该控制信息进行资源分配; 如果监听到基站通知中继站所属终端 控制信息, 则将该控制信息转发给对应终端。 The control information may include: any one or any combination of the uplink scheduling grant control information under the relay station, the base station notifying the relay station of the resource control information, and the base station notifying the relay station of the terminal control information. If the relay station monitors the uplink scheduling grant control information under the relay station, demodulating the corresponding service information according to the control information; if the base station is notified, the relay station can use the resource control signal The information is allocated according to the control information. If the base station is notified of the terminal control information of the relay station, the control information is forwarded to the corresponding terminal.
如图 1所示, 上述由基站通知中继站被占用的资源块的数量、 位置和分 配方式釆用的方法可以是: 基站通过 PDCCH承载上述各属性信息或通过其 与中继站约定的一个或多个 PDSCH资源块承载上述各属性信息。  As shown in FIG. 1, the foregoing method for the base station notifying the number, location, and allocation mode of the resource blocks occupied by the relay station may be: the base station carries the foregoing attribute information through the PDCCH or one or more PDSCHs that are agreed with the relay station through the PDCCH. The resource block carries the above attribute information.
此外, 当 PDSCH 资源块用于承载控制信息时, 基站不再对该资源块进 行业务分配, 以防止控制信道和业务信道的相互干扰。  In addition, when the PDSCH resource block is used to carry control information, the base station no longer allocates traffic to the resource block to prevent mutual interference between the control channel and the traffic channel.
而传输控制信息的系统, 如图 2所示, 包括基站及其覆盖范围内的中继 站, 基站中包括资源分配模块及信息发送模块, 中继站中包括信息接收模块 及执行模块;  The system for transmitting control information, as shown in FIG. 2, includes a base station and a relay station in its coverage area, the base station includes a resource allocation module and an information sending module, and the relay station includes an information receiving module and an execution module;
资源分配模块用于根据基站与上述中继站约定好的方式为要向该中继站 下发的控制信息分配 PDSCH资源块,或为要向所述中继站下发的控制信息分 配 PDSCH资源块并将所述被占用的 PDSCH资源块的属性信息发送给信息发 送模块, 其中,被占用的 PDSCH资源块的属性信息包括该资源块的数量、位 置和分配方式;  The resource allocation module is configured to allocate a PDSCH resource block to the control information to be sent to the relay station according to a manner agreed by the base station and the foregoing relay station, or allocate a PDSCH resource block to the control information to be sent to the relay station, and allocate the PDSCH resource block The attribute information of the occupied PDSCH resource block is sent to the information sending module, where the attribute information of the occupied PDSCH resource block includes the quantity, location, and allocation manner of the resource block;
信息发送模块用于釆用频分复用的方式通过上述分配好的 PDSCH 资源 块向其覆盖范围内的中继站下发所述控制信息; 还用于将接收到的被占用的 PDSCH资源块的属性信息发送给中继站;  The information sending module is configured to send the control information to the relay station in the coverage area by using the allocated PDSCH resource block by using the allocated PDSCH resource block, and is also used for the attribute of the received occupied PDSCH resource block. Information is sent to the relay station;
信息接收模块用于根据预先约定或接收到的所述属性信息在对应的 PDSCH资源块接收基站向其下发的控制信息并发送给执行模块;  The information receiving module is configured to receive control information sent by the base station to the corresponding module in the corresponding PDSCH resource block according to the attribute information that is pre-agreed or received, and send the control information to the execution module;
执行模块用于根据控制信息执行对应的操作。  The execution module is configured to perform a corresponding operation according to the control information.
该系统中各模块的功能同上述方法中对应的功能, 在此不再进行赞述。  The functions of the modules in the system are the same as those in the above methods, and will not be described here.
综上所述, 釆用本发明后, 由于没有对原有 PDCCH结构进行更改, 且 以资源块 RB的方式承载控制信息时,该 RBs不会再被调度,对于普通的 UEs 是不可见的, 即 UEs根据控制信息认为自己并没有被调度在该 RBs上, 因此 保证了后向兼容性(兼容 LTE系统) , 并且 FDM的应用也获得了频率分集 增益。 下面用本发明的几个应用实例进一步加以说明。 In summary, after the present invention is used, since the original PDCCH structure is not changed, and the control information is carried in the manner of the resource block RB, the RBs are not scheduled, and are invisible to the ordinary UEs. That is, the UEs consider that they are not scheduled on the RBs according to the control information, thus ensuring backward compatibility (compatible with the LTE system), and the FDM application also obtains the frequency diversity gain. The following is further illustrated by several application examples of the present invention.
实例一:  Example 1:
基站通过子帧的前 3个 OFDM符号即 PDCCH向其覆盖范围内的多个 UE 发送控制信息, 通过 PDSCH资源块向其覆盖范围内的中继站发送控制信息, 并通过该基站和该中继站约定的一个或多个 PDSCH 资源块承载该被占用的 PDSCH资源块的数量、 位置和分配方式信息。  The base station sends control information to multiple UEs in its coverage area through the first 3 OFDM symbols of the subframe, and transmits control information to the relay station in its coverage through the PDSCH resource block, and the one agreed by the base station and the relay station Or multiple PDSCH resource blocks carry the number, location, and allocation mode information of the occupied PDSCH resource blocks.
中继站在其和基站约定的一个或多个 PDSCH 资源块上监听到上述被占 用的 PDSCH资源块的数量、位置和分配方式信息后,根据该信息监听对应的 PDSCH资源块上承载的控制信息。 如果在该对应的 PDSCH资源块上监听到 中继站下上行调度授权控制信息, 则该中继站根据该控制信息解调对应的业 务信息; 如果监听到基站通知中继站可利用资源控制信息, 则该中继站根据 该控制信息进行资源分配; 如果监听到基站通知中继站所属终端控制信息, 则该中继站向该对应终端转发该控制信息。  After the relay station monitors the quantity, location, and allocation mode information of the occupied PDSCH resource block on the one or more PDSCH resource blocks that the base station and the base station have agreed upon, the relay station monitors the control information carried on the corresponding PDSCH resource block according to the information. If the uplink scheduling grant control information is monitored on the corresponding PDSCH resource block, the relay station demodulates the corresponding service information according to the control information; if the base station is notified to notify the relay station that the resource control information is available, the relay station according to the The control information is used for resource allocation; if the base station is notified of the terminal control information to which the relay station belongs, the relay station forwards the control information to the corresponding terminal.
实例二:  Example 2:
基站通过 PDSCH 资源块向其覆盖范围内的中继站发送控制信息, 通过 子帧的前 3个 OFDM符号即 PDCCH向其覆盖范围内的多个 UE发送控制信 息及上述被占用的 PDSCH资源块的数量、 位置和分配方式信息。  The base station sends control information to the relay station in its coverage area through the PDSCH resource block, and transmits the control information and the number of the occupied PDSCH resource blocks to the plurality of UEs in the coverage area by using the PDCCH of the first three OFDM symbols of the subframe, Location and distribution method information.
中继站在 PDCCH上监听到被占用的 PDSCH资源块的数量、位置和分配 方式信息后,根据该信息监听对应的 PDSCH资源块上承载的控制信息。如果 监听到中继站下上行调度授权控制信息, 则该中继站根据该控制信息解调对 应的业务信息; 如果监听到基站通知中继站可利用资源控制信息, 则根据该 控制信息进行资源分配; 如果监听到基站通知中继站所属终端控制信息, 则 将该控制信息转发给对应终端。  After monitoring the number, location, and allocation mode information of the occupied PDSCH resource blocks on the PDCCH, the relay station monitors the control information carried on the corresponding PDSCH resource block according to the information. If the uplink scheduling grant control information is monitored by the relay station, the relay station demodulates the corresponding service information according to the control information; if the base station is notified to notify the relay station that the resource control information is available, the resource allocation is performed according to the control information; if the base station is monitored When the terminal control information of the relay station is notified, the control information is forwarded to the corresponding terminal.
实例三:  Example three:
基站通过子帧的前 3个 OFDM符号即 PDCCH向其覆盖范围内的多个 UE 发送控制信息及中继站下上行调度授权控制信息, 而需要发送给中继站的其 它控制信息通过 PDSCH资源块承载, 该被占用的 PDSCH资源块的数量、 位 置和分配方式信息通过该基站和该中继站约定的一个或多个 PDSCH 资源块 承载。 The base station sends the control information and the uplink scheduling grant control information of the relay station to the multiple UEs in the coverage area through the first three OFDM symbols of the subframe, that is, the PDCCH, and the other control information that needs to be sent to the relay station is carried by the PDSCH resource block. Number of occupied PDSCH resource blocks, bits The allocation and allocation mode information is carried by one or more PDSCH resource blocks agreed by the base station and the relay station.
中继站在 PDCCH上监听到中继站下上行调度授权控制信息后, 根据该 控制信息解调对应的业务信息;在其与基站约定的一个或多个 PDSCH资源块 上监听到被占用的 PDSCH资源块的数量、位置和分配方式信息后,则根据该 信息监听对应的 PDSCH资源块上承载的控制信息。如果监听到基站通知中继 站可利用资源控制信息, 则该中继站根据该控制信息进行资源分配; 如果监 听到基站通知中继站所属终端控制信息, 则该中继站将该控制信息转发给对 应终端。  After receiving the uplink scheduling grant control information of the relay station on the PDCCH, the relay station demodulates the corresponding service information according to the control information; and monitors the number of occupied PDSCH resource blocks on one or more PDSCH resource blocks that are agreed with the base station. After the location information and the allocation mode information, the control information carried on the corresponding PDSCH resource block is monitored according to the information. If the base station is notified that the relay station can utilize the resource control information, the relay station performs resource allocation according to the control information; if the base station is notified of the terminal control information to which the relay station belongs, the relay station forwards the control information to the corresponding terminal.
实例四:  Example four:
基站通过子帧的前 3个 OFDM符号即 PDCCH上向其覆盖范围内的多个 UE发送控制信息、 中继站下上行调度授权控制信息及被占用的 PDSCH资源 块的数量、 位置和分配方式信息, 而发送给中继站的其它控制信息由上述被 占用的 PDSCH资源块承载。  The base station sends control information, the uplink scheduling grant control information of the relay station, and the number, location, and allocation mode information of the occupied PDSCH resource blocks to the multiple UEs in the coverage area through the first three OFDM symbols of the subframe, that is, the PDCCH. Other control information sent to the relay station is carried by the above occupied PDSCH resource block.
中继站在 PDCCH中监听到中继站下上行调度授权控制信息后, 根据该 控制信息解调对应的业务信息;监听到被占用的 PDSCH资源块的数量、位置 和分配方式信息后,监听对应的 PDSCH资源块上承载的控制信息。如果监听 到基站通知中继站可利用资源控制信息, 则该中继站根据该控制信息进行资 源分配; 如果监听到基站通知中继站所属终端控制信息, 则该中继站将该控 制信息转发给对应终端。  After receiving the uplink scheduling grant control information of the relay station, the relay station demodulates the corresponding service information according to the control information; after listening to the number, location, and allocation mode information of the occupied PDSCH resource block, the relay station monitors the corresponding PDSCH resource block. Control information carried on. If the base station is notified that the relay station can utilize the resource control information, the relay station performs resource allocation according to the control information; if the base station is notified to notify the relay station of the terminal control information, the relay station forwards the control information to the corresponding terminal.
当然, 本发明还可有其他多种实施例, 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。 It is a matter of course that the invention may be embodied in various other forms and modifications without departing from the spirit and scope of the invention.
工业实用性 本发明提供的基站向中继站下发控制信息及传输控制信息的技术方案没 有对原有物理下行控制信道 PDCCH结构进行更改,且以资源块 RB的方式承 载控制信息时, 该 RBs不会再被调度, 对于普通的 UEs是不可见的, 即 UEs 根据控制信息认为自己并没有被调度在该 RBs上,因此保证了后向兼容性(兼 容 LTE系统) , 并且 FDM的应用也获得了频率分集增益。 Industrial Applicability The technical solution for the base station to send control information and transmission control information to the relay station does not change the original physical downlink control channel PDCCH structure, and the resource block RB is adopted. When the control information is carried, the RBs are not scheduled again, and are invisible to ordinary UEs, that is, the UEs consider that they are not scheduled on the RBs according to the control information, thus ensuring backward compatibility (compatible with the LTE system). And the application of FDM also obtained the frequency diversity gain.

Claims

权 利 要 求 书 Claim
1、 一种基站向中继站下发控制信息的方法, 其包括: A method for a base station to send control information to a relay station, comprising:
所述基站釆用频分复用的方式通过物理下行共享信道 PDSCH 资源块向 所述基站覆盖范围内的中继站下发控制信息; 以及  Transmitting, by the base station, the control information to the relay station in the coverage of the base station by using a physical downlink shared channel PDSCH resource block in a frequency division multiplexing manner;
所述基站与所述中继站预先约定好被占用的 PDSCH 资源块的数量、 位 置和分配方式, 或所述基站通知所述中继站被占用的 PDSCH资源块的数量、 位置和分配方式。  And the base station and the relay station pre-approve the number, location, and allocation manner of the occupied PDSCH resource blocks, or the base station notifies the number, location, and allocation manner of the PDSCH resource blocks occupied by the relay station.
2、 如权利要求 1所述的方法, 其中, 2. The method of claim 1 wherein
所述基站通过所述 PDSCH 资源块向所述基站覆盖范围内的中继站下发 控制信息的步骤为:所述基站通过所述 PDSCH资源块向所述基站覆盖范围内 的中继站下发全部控制信息,或通过所述 PDSCH资源块向所述基站覆盖范围 内的中继站下发部分控制信息, 而另一部分控制信息通过物理下行控制信道 PDCCH下发。  And the step of the base station transmitting the control information to the relay station in the coverage of the base station by using the PDSCH resource block: the base station sends all the control information to the relay station in the coverage of the base station by using the PDSCH resource block, Or, the part of the control information is sent to the relay station in the coverage of the base station by using the PDSCH resource block, and the other part of the control information is sent by using the physical downlink control channel PDCCH.
3、 如权利要求 1或 2所述的方法, 其中, 3. The method according to claim 1 or 2, wherein
所述控制信息包括: 中继站下上行调度授权控制信息、 基站通知中继站 可利用资源控制信息及基站通知中继站所属终端控制信息中的任意一个或其 任意组合。  The control information includes: any one or any combination of uplink scheduling grant control information under the relay station, base station notification relay station available resource control information, and base station notification relay station belonging terminal control information.
4、 如权利要求 1所述的方法, 其中, 4. The method of claim 1, wherein
所述基站通知所述中继站被占用的 PDSCH 资源块的数量、 位置和分配 方式的步骤为: 所述基站通过物理下行控制信道 PDCCH承载被占用的 PDSCH资源块的数量、位置和分配方式, 或所述基站通过其与所述中继站约 定的一个或多个 PDSCH资源块承载被占用的 PDSCH资源块的数量、位置和 分配方式。  The step of the base station notifying the number, location, and allocation mode of the PDSCH resource blocks that are occupied by the relay station is: the number, location, and allocation manner of the occupied PDSCH resource blocks by the base station through the physical downlink control channel PDCCH, or The base station carries the number, location, and allocation manner of the occupied PDSCH resource blocks by one or more PDSCH resource blocks that the base station has agreed with.
5、 一种传输控制信息的方法, 其包括: 5. A method of transmitting control information, comprising:
所述基站釆用频分复用的方式通过物理下行共享信道 PDSCH 资源块向 所述基站覆盖范围内的中继站下发控制信息; 所述基站与所述中继站预先约定好被占用的 PDSCH资源块的属性信息, 或所述基站向所述中继站发送被占用的 PDSCH资源块的属性信息,其中,所 述被占用的 PDSCH资源块的属性信息包括所述被占用的 PDSCH资源块的数 量、 位置和分配方式; 以及 And transmitting, by the base station, the control information to the relay station in the coverage of the base station by using a physical downlink shared channel PDSCH resource block in a frequency division multiplexing manner; And the base station and the relay station pre-agreed the attribute information of the occupied PDSCH resource block, or the base station sends the attribute information of the occupied PDSCH resource block to the relay station, where the occupied PDSCH resource block is The attribute information includes the number, location, and allocation manner of the occupied PDSCH resource blocks;
所述中继站根据预先约定或接收到的所述被占用的 PDSCH 资源块的属 性信息在所述被占用的 PDSCH资源块上监听控制信息,并根据监听到的控制 信息执行操作。  And the relay station monitors the control information on the occupied PDSCH resource block according to the attribute information of the occupied PDSCH resource block that is pre-agreed or received, and performs an operation according to the monitored control information.
6、 如权利要求 5所述的方法, 其中, 6. The method of claim 5, wherein
所述基站通过所述 PDSCH 资源块向所述基站覆盖范围内的中继站下发 控制信息的步骤包括:所述基站通过所述 PDSCH资源块向所述基站覆盖范围 内的中继站下发全部控制信息,或通过所述 PDSCH资源块向所述基站覆盖范 围内的中继站下发部分控制信息, 而另一部分控制信息通过物理下行控制信 道 PDCCH下发。  And the step of the base station transmitting the control information to the relay station in the coverage of the base station by using the PDSCH resource block, the base station sending, by using the PDSCH resource block, all the control information to the relay station in the coverage of the base station, Or, the part of the control information is sent to the relay station in the coverage of the base station by using the PDSCH resource block, and the other part of the control information is sent by using the physical downlink control channel PDCCH.
7、 如权利要求 5或 6所述的方法, 其中, 7. The method according to claim 5 or 6, wherein
所述基站向所述中继站发送所述属性信息的步骤包括: 所述基站通过物 理下行控制信道 PDCCH承载所述属性信息或通过所述基站与所述中继站约 定的一个或多个 PDSCH资源块承载所述属性信息。  The step of the base station transmitting the attribute information to the relay station includes: the base station carrying the attribute information through a physical downlink control channel PDCCH or one or more PDSCH resource block bearers agreed by the base station and the relay station Attribute information.
8、 如权利要求 5或 6所述的方法, 其中, 8. The method according to claim 5 or 6, wherein
所述控制信息包括: 中继站下上行调度授权控制信息、 基站通知中继站 可利用资源控制信息及基站通知中继站所属终端控制信息中的任意一个或其 任意组合;  The control information includes: an uplink scheduling grant control information under the relay station, a base station notifying the relay station of the available resource control information, and the base station notifying the relay station of the terminal control information, or any combination thereof;
所述中继站根据监听到的控制信息执行操作的步骤包括: 如果所述中继 站监听到所述中继站下上行调度授权控制信息, 则解调所述中继站下上行调 度授权控制信息对应的业务信息; 如果所述中继站监听到所述基站通知中继 站可利用资源控制信息, 则才艮据所述基站通知中继站可利用资源控制信息进 行资源分配; 如果所述基站监听到所述基站通知中继站所属终端控制信息, 则将所述基站通知中继站所属终端控制信息转发给所述中继站所属终端。 The step of the relay station performing an operation according to the monitored control information includes: if the relay station monitors the uplink scheduling grant control information of the relay station, demodulating the service information corresponding to the uplink scheduling grant control information of the relay station; If the relay station monitors that the base station notifies the relay station that the resource control information is available, then the base station notifies the relay station that the resource control information can be used for resource allocation; if the base station monitors the base station to notify the relay station of the terminal control information, And notifying the base station to notify the terminal control information to which the relay station belongs to the terminal to which the relay station belongs.
9、一种传输控制信息的系统, 其包括基站及所述基站覆盖范围内的中继 站, 其中, A system for transmitting control information, comprising: a base station and a relay station within the coverage of the base station, wherein
所述基站包括资源分配模块及信息发送模块, 所述中继站包括信息接收 模块及执行模块;  The base station includes a resource allocation module and an information sending module, and the relay station includes an information receiving module and an execution module;
所述资源分配模块设置为根据所述基站与所述中继站约定好的方式为要 向所述中继站下发的控制信息分配物理下行共享信道 PDSCH资源块,或为要 向所述中继站下发的控制信息分配物理下行共享信道 PDSCH 资源块并将被 占用的 PDSCH资源块的属性信息发送给所述信息发送模块,其中,所述被占 用的 PDSCH资源块的属性信息包括所述 PDSCH资源块的数量、位置和分配 方式;  The resource allocation module is configured to allocate, according to a manner agreed by the base station and the relay station, a physical downlink shared channel (PDSCH) resource block, or a control to be sent to the relay station, to be sent to the relay station. The information is allocated to the physical downlink shared channel PDSCH resource block, and the attribute information of the occupied PDSCH resource block is sent to the information sending module, where the attribute information of the occupied PDSCH resource block includes the number of the PDSCH resource blocks, Location and distribution method;
所述信息发送模块设置为釆用频分复用的方式通过所述分配好的 The information sending module is configured to adopt the frequency division multiplexing manner by using the allocated
PDSCH资源块向所述中继站下发所述控制信息,并将接收到的所述被占用的 PDSCH资源块的属性信息发送给所述中继站; Transmitting, by the PDSCH resource block, the control information to the relay station, and transmitting the received attribute information of the occupied PDSCH resource block to the relay station;
所述信息接收模块设置为根据预先约定或接收到的所述属性信息在所述 PDSCH 资源块接收所述基站向所述中继站下发的控制信息并发送给所述执 行模块;  The information receiving module is configured to receive control information sent by the base station to the relay station in the PDSCH resource block according to the attribute information that is pre-agreed or received, and send the control information to the execution module;
所述执行模块设置为根据所述控制信息执行操作。  The execution module is configured to perform an operation in accordance with the control information.
10、 如权利要求 9所述的系统, 其中, 10. The system of claim 9, wherein
所述控制信息包括: 中继站下上行调度授权控制信息、 基站通知中继站 可利用资源控制信息及基站通知中继站所属终端控制信息中的任意一个或其 任意组合;  The control information includes: an uplink scheduling grant control information under the relay station, a base station notifying the relay station of the available resource control information, and the base station notifying the relay station of the terminal control information, or any combination thereof;
所述执行模块还设置为在监听到所述中继站下上行调度授权控制信息 时, 解调所述中继站下上行调度授权控制信息对应的业务信息; 在监听到所 述基站通知中继站可利用资源控制信息时, 才艮据所述基站通知中继站可利用 资源控制信息进行资源分配; 以及在监听到所述基站通知中继站所属终端控 制信息时, 将所述基站通知中继站所属终端控制信息转发给所述中继站所属 终端。  The execution module is further configured to: when listening to the uplink scheduling grant control information of the relay station, demodulate the service information corresponding to the uplink scheduling grant control information of the relay station; and notify the base station to notify the relay station that the resource control information is available When the base station informs the relay station that the resource control information can be used for resource allocation, and when the base station is notified of the terminal control information of the relay station, the base station notifies the terminal control information of the relay station to be forwarded to the relay station. terminal.
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