WO2010105536A1 - 一种中继链路控制信道传输方法及系统 - Google Patents

一种中继链路控制信道传输方法及系统 Download PDF

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Publication number
WO2010105536A1
WO2010105536A1 PCT/CN2010/071027 CN2010071027W WO2010105536A1 WO 2010105536 A1 WO2010105536 A1 WO 2010105536A1 CN 2010071027 W CN2010071027 W CN 2010071027W WO 2010105536 A1 WO2010105536 A1 WO 2010105536A1
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Prior art keywords
base station
control information
relay node
link
relay
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PCT/CN2010/071027
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English (en)
French (fr)
Inventor
毕峰
袁明
梁枫
杨瑾
吴栓栓
姜静
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中兴通讯股份有限公司
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42739190&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2010105536(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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
Priority to KR1020117020291A priority Critical patent/KR101247394B1/ko
Priority to JP2011553271A priority patent/JP5342659B2/ja
Priority to US13/203,462 priority patent/US8599783B2/en
Priority to EP10753103.0A priority patent/EP2393252B1/en
Priority to RU2011136256/07A priority patent/RU2471303C1/ru
Priority to MX2011009713A priority patent/MX2011009713A/es
Priority to BRPI1013880-3A priority patent/BRPI1013880B1/pt
Publication of WO2010105536A1 publication Critical patent/WO2010105536A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15542—Selecting at relay station its transmit and receive resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15557—Selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a relay transmission technology, and more particularly to a downlink relay link control channel transmission method in a 3GPP Medium Term Evolution System (LTE) and an Advanced Long Term Evolution Advanced (LTE-A) system. And system. Background technique
  • LTE Medium Term Evolution System
  • LTE-A Advanced Long Term Evolution Advanced
  • Orthogonal Frequency Division Multiplexing In an Orthogonal Frequency Division Multiplexing (OFDM) system, since it is a time-frequency two-dimensional data format, the multiplexing form between the control channel and the traffic channel can be in the time direction and in the frequency direction. That is, the Time Division Multiplex (TDM) method and the Frequency Division Multiplex (FDM) method are adopted.
  • TDM Time Division Multiplex
  • FDM Frequency Division Multiplex
  • LTE and LTE-A RB (Resource Block, resource block mapping; physical resource block is called Physical Resource Block, physical resource block) is defined as OFDM in one slot (slot) in time domain.
  • the symbol is 12 or 24 subcarriers in the frequency domain, so 1 RB consists of N symb x N B RE (Resource Element), where N symb represents the number of OFDM symbols in one slot, indicating resources. The number of consecutive subcarriers in the frequency domain of the block.
  • the LTE system, the LTE-A system, and the advanced International Mobile Telecommunication Advanced (IMT-Advanced) are based on the OFDM technology.
  • the OFDM system the time-frequency two-dimensional data format is used.
  • the control channel usually adopts the TDM mode, that is, the control channel and the traffic channel are separated in time, for example, there are 14 OFDM symbols in one subframe, the first or the first two or the first three or the first four OFDM.
  • the symbol acts as a control channel, and accordingly, the last 13 or the last 12 or the last 11 or the last 10 OFDM symbols are used as traffic channels.
  • the control channel of the current LTE system is taken as an example.
  • the downlink control signaling mainly includes the following contents:
  • PCnCH Physical Control Format Indicator Channel
  • Downlink grant 4 Downlink grant, DL grant
  • PHICH Physical Hybrid Automatic Repeat Request Indicator Channel
  • control channel is composed of different components, each of which has its specific function.
  • terms and conventions are defined below.
  • CCEs consecutive L subcarriers in the frequency domain are called CCEs, and CCEs may include DL grants and UL grants;
  • Each control channel is composed of one CCE or multiple CCE combinations
  • Each UE can monitor a series of candidate control channels
  • the number of candidate control channels is 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 one or two or four or eight CCEs are combined together as a candidate control channel;
  • 1, 2, 4, 8 combinations correspond to different coding rates
  • the control information of each UE is separately channel coded, and QPSK modulation, CCE to RE (Resource Element) mapping, and finally Fast Fourier Inversion are performed.
  • IFFT Inverse Fast Fourier Transform
  • the control channel is composed of 32 CCEs, and the receiving end performs Fast Fourier Transform (FFT) transformation, and the UE is combined into one.
  • CCE starts blind detection (ie, for CCE0,
  • CCE1 CCE31 performs blind detection. If the UE_ID is not successfully monitored, it is blindly detected by combining 2 CCEs (ie, for [CCEO CCE1], [CCE2 CCE3] [CCE30 respectively).
  • the UE_ID that matches itself is not detected during the entire blind detection process, the UE does not have its own control signaling release, then the UE switches to the sleep mode; if it listens to the UE_ID that matches itself, it follows the control. Signaling demodulates the corresponding service information.
  • B3G/4G The research goal of B3G/4G is to integrate access systems such as cellular, fixed wireless access, nomadic, wireless regional networks, and all-IP networks to provide users with peak transmission rates of up to 100 Mbps and IGbps in high-speed and low-speed mobile environments. Capabilities, and the seamless integration of cellular systems, regional wireless networks, broadcast, and television satellite communications, enables humans to "anybody can communicate with anyone else in any way, anytime, anywhere.” Relay technology can be applied as an effective measure. Relay technology can increase cell coverage and increase cell capacity.
  • the link between the eNode-B to the relay node and the link between the relay node and the user equipment (User Equipment) operate on the same frequency resource. . Since the transmitter of the in-band relay node will cause interference (self-interference) to its own receiver, the link between the eNode-B to the relay node and the link between the relay node and the UE cannot be simultaneously The same frequency resources work unless there is sufficient signal separation and antenna isolation. Similarly, it is also impossible for the relay node to transmit to the eNode-B while receiving the data transmitted by the UE.
  • a 10 ms radio frame is composed of 10 1 ms subframes, which may include a unicast Unicast subframe and a multicast broadcast Multicast. Broadcast subframe, where the #0, #5 subframe is used as the transmit synchronization signal, and the #4, #9 subframe is used as the paging paging in the frequency division duplex (FDD) mode.
  • FDD frequency division duplex
  • #0, #5 subframes are used as the transmission synchronization signal
  • #1, #6 subframes are used as paging paging, that is, for FDD ⁇ #0, # 4, #5, #9 ⁇ subframe, TDD ⁇ #0, #1, #5, #6 ⁇ subframes have the above special purposes, so they cannot be used in multicast broadcast single frequency network (MBSFN).
  • MSSFN multicast broadcast single frequency network
  • the allocation of subframes that is, the maximum number of MBSF subframes that can be allocated in one radio frame is 6 subframes.
  • a possible solution to the problem of transceiving interference is to prevent the relay node from transmitting to the UE when receiving data from the eNode-B, that is, to increase the guard interval slot after relaying to the UE link (gap) ), no operation is performed in the guard interval slot, only for transmitting or receiving state transitions.
  • the MBSFN subframe is used in the LTE for the transmission of the relay subframe.
  • the specific manner is as follows: The MBMS Control Entity (MCE) first configures the available MBSF subframes for the eNode-B, and the eNode-B further The available relay subframes are configured in the available MBSFN subframes.
  • MCE MBMS Control Entity
  • the relay node when downlinking, the relay node first transmits control information (including ACK/NACK (Acknowlegment/Negative Acknowlegment) and uplink grant information (UL grant) to the UEs of its subordinates in the first 1 or 2 OFDM symbols. Then, the transmission-to-receive handover is completed within the "gap" time range, and the data from the eNode-B is received in the following OFDM symbols after the handover is completed.
  • control information including ACK/NACK (Acknowlegment/Negative Acknowlegment) and uplink grant information (UL grant)
  • the research on the MBSFN subframe as a relay subframe is a hot spot, but the specific control channel structure and mapping manner of the eNode-B (base station) to the relay node (RN) link Still blank.
  • the RN since the RN first transmits control information to the UEs of its subordinates in the first 1 or 2 OFDM symbols in the downlink, and the eNode-B transmits the control information to the direct transmission UE in the first 1 or 2 or 3 or 4 OFDM symbols, The RN cannot receive control information of the eNode-B to the RN link in the first 1 or 2 OFDM symbols, and these The problem is the problem that the invention has to solve. Summary of the invention
  • one of the main purposes of the present invention is to provide a relay link control channel transmission method for solving the problem of mapping and transmission of a control channel on a base station to a relay node link.
  • the technical solution of the present invention is achieved as follows:
  • the frequency division multiplexing mode carries one or more resource blocks in a frequency direction, and a control set information of a base station to a relay node link is carried in a complete set of OFDM symbols available in a relay link in a subframe in a time direction;
  • the time division is combined with the frequency division multiplexing mode to carry one or more resource blocks in the frequency direction, and the subset of OFDM symbols available in the relay link in the time direction sub-frame carries control information of the base station to the relay node link;
  • the time division multiplexing mode carries control information of a base station to a relay node link in a subset of OFDM symbols available in a relay link in a subframe in a time direction in all resource blocks in a frequency direction;
  • the control channel map includes a mapping of time directions and/or frequency directions.
  • the frequency division multiplexing mode carries the control information of the base station to the relay node link in a continuous or discrete resource block, and the complete set of OFDM symbols available in the intra-subframe relay link.
  • mapping manner of the control channel in the frequency direction in the frequency division multiplexing mode is:
  • the control information carrying manner corresponding to the multiplex symbol of the OFDM symbol available in the intra-subframe relay link is used to carry the control information of the base station to the relay node link.
  • the base station and the relay node are in accordance with the system.
  • the number of cells and the total number of resource blocks or the number and location of resource blocks that can be used to carry control information of the base station to the relay node link according to the cell ID and the subframe number in the system, and are determined to be used to carry the base station to the relay node.
  • Resource block for control information of the link The number and location information of the resource blocks for carrying control information and other resource blocks for carrying the base station to the relay node link control message on one or more of the resource blocks;
  • the control information carrying manner corresponding to the multiplex symbol of the OFDM symbol available in the intra-subframe relay link is used to carry the control information of the base station to the relay node link; in the bearer mode, the base station and the relay node are configured according to The number of cells and the total number of resource blocks in the system or the number and location of resource blocks that can be used to carry control information of the base station to the relay node link according to the cell ID and the subframe number in the system, and are determined to be used to carry the base station to The number of resource blocks on the resource block corresponding to the PCFICH physical control format indication channel mapping subcarrier group and the number of resource blocks used to carry the base station to the relay node link control information in the resource block of the relay node link control information location information.
  • the time division combined with the frequency division multiplexing mode is a continuous or discrete resource block, and a subset of the OFDM symbols available in the intra-subframe relay link carries control information of the base station to the relay node link.
  • mapping of the control channel in the frequency direction is:
  • the control information carrying manner corresponding to the subset of the OFDM symbols available in the intra-subframe relay link is used to carry the base station-to-relay node link control information; in the bearer mode, the base station and the relay node are in the system according to the system
  • One or more resource blocks in the resource block of the control information of the road carry control information and other number and location information of resource blocks for carrying base station to relay node link control information;
  • the base station and the relay node are configured according to The number of resource blocks in the system and the total number of resource blocks or the number of resource blocks that can be used to carry base station to relay node link control information according to the cell ID and subframe number in the system And location, in the determined resource block that can be used to carry the base station to relay node link control information
  • the PCnCH physical control format indicates the number of bearer control information on the resource block corresponding to the channel mapping subcarrier group and other resource blocks for carrying the base station to the relay node link control information.
  • the time division multiplexing mode carries all the resource blocks in the frequency direction, and the subset of the OFDM symbols available in the subframes in the time direction carries the control information of the base station to the relay node link, specifically, The control information is carried by all frequency resources in the OFDM symbol.
  • the number of OFDM symbols carrying the control information of the base station to the relay node link in time division combining frequency division multiplexing or time division multiplexing is at least one to four.
  • the location of the OFDM symbol that the base station transmits the control information for carrying the base station to the relay node link starts from the 4th or 5th OFDM symbol, where the number of downlink resource blocks is less than or equal to 10
  • the location of the OFDM symbol transmitted by the base station for transmitting the control information of the base station to the relay node link starts from the 5th OFDM symbol; otherwise, the base station transmits the OFDM symbol for carrying the control information of the base station to the relay node link.
  • the position starts from the 4th OFDM symbol;
  • the position of the OFDM symbol that the relay node receives the control information for carrying the base station to the relay node link starts from the 4th or 5th OFDM symbol, wherein when the number of downlink resource blocks is less than or equal to 10, the relay node receives The location of the OFDM symbol used to carry the control information of the base station to the relay node link starts at the 5th OFDM symbol; otherwise the relay node receives the location of the OFDM symbol used to carry the control information of the base station to the relay node link Starts at the 4th OFDM symbol.
  • the location of the OFDM symbol transmitted by the base station for transmitting the control information of the base station to the relay node link starts from the 4th or 5th OFDM symbol; the relay node receives the base station to the base station.
  • the position of the OFDM symbol following the control information of the node link starts from the 4th or 5th OFDM symbol.
  • the base station transmits a control signal for carrying the base station to the relay node link
  • the starting position of the OFDM symbol of the interest is configured in a signaling manner; the starting position of the OFDM symbol that the relay node receives the control information for carrying the base station to the relay node link is acquired according to the signaling configuration.
  • control information of the base station to the relay node link includes control information of one relay node or multiple relay nodes; the control information further includes: an uplink scheduling 4 authorized control information under the relay node, and/ Or the base station notifies the relay node that the control information of the resource can be utilized, and/or the base station notifies the control information of the terminal to which the relay node belongs.
  • Another object of the present invention is to provide a relay link control channel transmission system, including: a control channel mapping module, which is configured to adopt a frequency division multiplexing method, or a time division combining frequency division multiplexing method, or a time division multiplexing manner. Controlling the bearer of the information and mapping the control channel, and transmitting control information of the base station to the relay node link to the control channel demapping module;
  • control channel demapping module configured to receive and demapping the control channel, to obtain the control information
  • the frequency division multiplexing mode carries one or more resource blocks in a frequency direction, and a control set information of a base station to a relay node link is carried in a complete set of OFDM symbols available in a relay link in a subframe in a time direction;
  • the time division is combined with the frequency division multiplexing mode to carry one or more resource blocks in the frequency direction, and the subset of OFDM symbols available in the relay link in the time direction sub-frame carries control information of the base station to the relay node link;
  • the time division multiplexing mode carries control information of a base station to a relay node link in a subset of OFDM symbols available in a relay link in a subframe in a time direction in all resource blocks in a frequency direction;
  • the control channel map includes a mapping of time directions and/or frequency directions.
  • the mapping manner of the control channel in the time direction and/or the frequency direction is the same as that adopted in the method technical solution.
  • time division is combined with frequency division multiplexing or time division multiplexing.
  • the number of OFDM symbols of the control information of the base station to the relay node link is at least one and at most four.
  • the location of the OFDM symbol that the base station transmits the control information for carrying the base station to the relay node link starts from the 4th or 5th OFDM symbol, where the downlink resource block
  • the position of the OFDM symbol transmitted by the base station for transmitting the control information of the base station to the relay node link starts from the 5th OFDM symbol; otherwise, the base station transmits the link for carrying the base station to the relay node.
  • the position of the OFDM symbol of the control information starts from the 4th OFDM symbol; the position of the OFDM symbol that the relay node receives the control information for carrying the base station to the relay node link starts from the 4th or 5th OFDM symbol, Wherein when the number of downlink resource blocks is less than or equal to 10, the position of the OFDM symbol that the relay node receives the control information for carrying the base station to the relay node link starts from the 5th OFDM symbol; otherwise, the relay node receives the The position of the OFDM symbol carrying the control information of the base station to the relay node link starts from the 4th OFDM symbol.
  • the location of the OFDM symbol transmitted by the base station for transmitting the control information of the base station to the relay node link starts from the 4th or 5th OFDM symbol; the relay node receives the base station to the base station.
  • the position of the OFDM symbol following the control information of the node link starts from the 4th or 5th OFDM symbol.
  • the starting position of the OFDM symbol that the base station transmits the control information for carrying the base station to the relay node link is configured in a signaling manner; the relay node receives the base station to the relay node.
  • the starting position of the OFDM symbol of the control information of the link is obtained according to the signaling configuration.
  • the relay link control channel structure and mapping mode can be well applied to the base station to relay node link, which not only ensures backward compatibility (compatible with LTE system), but also solves the problem that the relay node can receive correctly.
  • the problem of control information from the base station, the effect of obtaining the frequency diversity gain, and the time division multiplexing method can also achieve the purpose of power saving, the frequency division multiplexing method and the time division combined frequency division
  • the multiplexing mode also has the advantage of flexible service scheduling.
  • FIG. 1 is a schematic diagram of a complete set of bearer control information of an OFDM symbol available in a continuous resource block and a relay link in a subframe according to an embodiment of the present invention
  • Embodiment 2 is a contiguous resource block according to Embodiment 2 of the present invention, and a relay link in a subframe is available.
  • FIG. 3 is a schematic diagram of a complete set of bearer control information of an OFDM symbol available in a discrete resource block and a relay link in a subframe according to Embodiment 3 of the present invention
  • FIG. 4 is a schematic diagram of a complete set of bearer control information of an OFDM symbol available in a discrete resource block and a relay link in a subframe according to Embodiment 4 of the present invention
  • FIG. 5 is a schematic diagram of bearer control information of all frequency resources according to Embodiment 5 of the present invention
  • FIG. 6 is a schematic diagram of bearer control information of OFDM symbols available in a continuous resource block and available in a sub-frame relay link according to Embodiment 6 of the present invention; ;
  • FIG. 7 is a schematic diagram of a subset of bearer control information of an OFDM symbol that is not dependent on a PCFICH-based discrete resource block and that is available in a subframe relay link according to Embodiment 7 of the present invention
  • FIG. 8 is a schematic diagram of a subset of bearer control information of an OFDM symbol that is dependent on a PCFICH-dependent discrete resource block and available in a relay link in a subframe according to Embodiment 8 of the present invention
  • FIG. 9 is a schematic structural diagram of a system for implementing a method for transmitting a control link of a relay link according to the present invention. detailed description
  • a sub-frame can be The first one or the first two or the first three OFDM symbols are used to carry control information of the base station to the terminal link.
  • the first three OFDM symbols are used to carry control information of the base station to the terminal link, and the figure is indicated by a shaded area.
  • the sixth, seventh, eighth, ninth, and tenth resource blocks, and the complete set of OFDM symbols available in the intra-subframe relay link is used to carry control information of the base station to the relay node link.
  • the corpus of OFDM symbols available in the relay link of this embodiment is the fourth OFDM symbol to the last OFDM symbol of the current subframe); the base station and the relay node are based on the cell ID (identity) and the total resource block in the system.
  • And location information which is identified by a national shaded area; the other resource blocks for carrying control information of the base station to the relay node link are the seventh, eighth, ninth, and tenth resource blocks, The figure is marked with a shaded area; the base station to terminal link and the base station to relay node link service information are carried on other resource blocks.
  • the frequency division multiplexing mode is adopted, and the control information of the base station to the relay node link is carried by the multiplex symbol of the contiguous resource block and the OFDM symbol available in the intra-subframe relay link, because the structure of the centralized resource block is adopted.
  • This method does not affect the link from the base station to the terminal, so the mode is flexible.
  • the first 1 or a subframe may be 2 or 3 or 4 OFDM symbols are used for carrying control information of the base station to the terminal link.
  • the first 4 OFDM symbols are used to carry control information of the base station to the terminal link, and the figure is marked by the national shadow area;
  • the control information of the base station to the relay node link is carried by the complete set of OFDM symbols available in the 16th, 17th, 18th, 19th, and 20th resource blocks and the intra-subframe relay link (this implementation)
  • the complete set of OFDM symbols available for the relay link is the fifth OFDM symbol to the last OFDM symbol of the current subframe); base station and relay node according to the system
  • the system ID (identity) and the total number of resource blocks are calculated according to the cell ID and the subframe number in the system, and are used in the 16th, 17th, 18th, 19th, and 20th resource blocks.
  • the control information carrying the link from the base station to the relay node is indicated by a shaded area in the figure; the base station to terminal link and the base station to relay node link service information are carried on other resource blocks.
  • the frequency division multiplexing mode is adopted, and the control information of the base station to the relay node link is carried by the multiplex symbol of the OFDM symbols available in the intra-subframe relay link, and the structure of the centralized resource block is adopted. There is no link affecting the base station to the terminal, so the mode is flexible.
  • FIG. 3 is a schematic diagram of the complete set bearer control information of an OFDM symbol available in a distributed (discrete) resource block and a sub-frame relay link, which is not dependent on the PCFICH.
  • the first one or the first two or the first three OFDM symbols of a certain subframe may be used to carry control information of the base station to the terminal link.
  • the previous three OFDM symbols carry the base station.
  • Control information to the terminal link, the shaded area is identified in the figure, with the sixth, tenth, 14th, 18th and 22nd resource blocks, and the OFDM symbols available in the sub-frame relay link
  • the ensemble of the base station to the relay node link control information (the OFDM symbol of the OFDM symbol available in the relay link in this embodiment is the fourth OFDM symbol to the last OFDM symbol of the current subframe); the base station and the relay node Calculating the sixth resource block for carrying control information of the base station to the relay node link and other for carrying the base station according to the cell ID (identity) and the total number of resource blocks in the system or according to the cell ID and the subframe number in the system.
  • the number of resource blocks and the location information of the control information of the relay node link which are identified by the national shaded area in the figure; the other resource block fingers used to carry the control information of the base station to the relay node link 10, 14th, 18th and 22 resource blocks, figure by the shaded area identified ⁇ ; carrier base station to a terminal and a base station link to the relay node link traffic information on other resource blocks.
  • the frequency division multiplexing mode is adopted, the discrete resource blocks are used, and the complete set of OFDM symbols available in the intra-subframe relay link carries the control information of the base station to the relay node link,
  • the structure of the tile resource block because there is no link affecting the base station to the terminal, the mode is flexible and more frequency diversity gain can be obtained.
  • FIG. 4 is a schematic diagram of the ensemble bearer control information of a OFDM symbol that is dependent on a PCFICH-dependent distributed (discrete) resource block and available in a sub-frame relay link.
  • the first one or the first two or the first three OFDM symbols of a certain subframe may be used to carry control information of the base station to the terminal link.
  • the first three OFDM symbols are used.
  • Control information for carrying the base station to the terminal link which is indicated by a shaded area in the figure; with the 4th, 7th, 10th, 13th, 16th, 19th and 22nd resource blocks, and A complete set of OFDM symbols available for the intra-subframe relay link is used to carry control information of the base station to the relay node link.
  • the OFDM symbol available in the relay link of this embodiment is the fourth OFDM symbol to the current sub-module.
  • the last OFDM symbol of the frame) the base station and the relay node agree to use the resource block corresponding to the PCFICH physical control format indication channel mapping subcarrier group for carrying control information of the base station to the relay node link and other for carrying the base station to The number of resource blocks and the location information of the control information of the relay node link, the national shaded area identifier is used in the figure; the PCFICH physical control format indicates that the resource blocks corresponding to the channel mapping subcarrier group are respectively 4th.
  • 10th, 16th and 22nd resource blocks which are identified by shaded areas in the figure; the other resource blocks for carrying control information of the base station to the relay node link refer to the 7th, 13th and 19th
  • the resource blocks are identified by the shaded area in the figure; the base station to terminal link and the base station to relay node link service information are carried on other blank resource blocks.
  • a frequency division multiplexing manner is adopted, and discrete resource blocks are used, and the complete set of OFDM symbols available in the intra-subframe relay link carries control information of the base station to the relay node link, because the structure of the distributed resource block is adopted. Because there is no link affecting the base station to the terminal, the mode is flexible and more frequency diversity gain can be obtained.
  • the control information of the point link that is, the schematic diagram of all the frequency resources used to carry the control information (the subset of the OFDM symbols available in the relay link in this embodiment is the 4th and/or 5th OFDM symbols), Based on the illustrated frame structure, the first or the first two or the first three OFDM symbols of a certain subframe may be used to carry control information of the base station to the terminal link, and the fourth and/or fifth OFDM may be used. All frequency resources of the symbol are used to carry control information of the base station to the relay node link.
  • the first three OFDM symbols are used to carry control information of the base station to the terminal link, and the national shaded area identifier is used in the figure; all frequency resources of the fourth and/or fifth OFDM symbols are used to carry the base station to The control information of the relay node link is indicated by the shaded area in the figure.
  • the base station to terminal link and the base station to relay node link service information are carried on other blank resource blocks.
  • the time division multiplexing mode is adopted, and the control information of the base station to the relay node link is carried on all consecutive frequencies on the continuous OFDM symbol. Because the structure of all frequency resources of the TDM is adopted, the relay node is used for the relay node. If the content of the control channel is monitored, if there is no control information of its own at this time, the relay node does not need to receive the following OFDM symbols, so that power saving can be achieved.
  • FIG. 6 is a schematic diagram of a subset of OFDM symbols that are available in a centralized (continuous) resource block and available in a sub-frame relay link according to the present invention, and may be based on a frame structure, and may be preceded by a certain subframe.
  • 1 or the first 2 or the first 3 OFDM symbols are used to carry the base station to the terminal link control information
  • the 4th and/or 5th OFDM symbol centralized resource blocks are used to carry the base station to the relay node chain Road control information.
  • the first three OFDM symbols are used to carry control information of the base station to the terminal link, and the national shaded area identifier is used in the figure
  • the centralized resource block of the fourth and/or fifth OFDM symbols is used to carry the base station.
  • Control information to the relay node link ie, the 6th to 20th resource blocks, and a subset of the OFDM symbols available for the intra-subframe relay link are used to carry control information of the base station to the relay node link
  • the subset of OFDM symbols available for the relay link in this embodiment is the 4th and/or 5th OFDM symbol, and is indicated by a shaded area in the figure.
  • the white resource block carries the base station to terminal link and the base station to relay node link service information.
  • the time division is combined with the frequency division multiplexing mode to carry control information on consecutive resource blocks in the OFDM symbol. Because the structure of the TDM centralized resource block is adopted, for the relay node, the relay node monitors the control channel. The content, if there is no control information of its own at this time, the relay node does not need to receive the following OFDM symbols, which can achieve the purpose of power saving.
  • FIG. 7 is a schematic diagram of a subset of bearer control information of an OFDM symbol that is not dependent on a PCFICH-based distributed (discrete) resource block and available in a sub-frame relay link, and may be based on a frame structure illustrated
  • the first or the first 2 or the first 3 OFDM symbols of the subframe are used for the control information of the base station to the terminal link, which is identified by a solid shadow area; the 4th and/or 5th
  • the distributed resource block of the OFDM symbol is used to carry control information of the base station to the relay node link, that is, the sixth, tenth, fourteenth, eighteenth and twenty-thth resource blocks, and the intra-subframe relay
  • a subset of OFDM symbols available for the link is used to carry control information of the base station to the relay node link (the subset of OFDM symbols available for the relay link in this embodiment is the 4th and/or 5th OFDM symbol) .
  • the base station and the relay node calculate the control information of the sixth resource block for carrying the base station to the relay node link according to the cell ID (identity) and the total number of resource blocks in the system or according to the cell ID and the subframe number in the system, and other The number and location information of the resource blocks used to carry the control information of the base station to the relay node link, which are identified by the national shaded area; the other resource block fingers used to carry the control information of the base station to the relay node link
  • the 10th, 14th, 18th, and 22nd resource blocks are identified by shaded areas in the figure.
  • the base station to terminal link and the base station to relay node link service information are carried on other blank resource blocks.
  • the time division is combined with the frequency division multiplexing mode, and the control information is carried on the discrete resource blocks in the OFDM symbol. Because the structure of the TDM distributed resource block is adopted, for the relay node, the relay node monitors the control channel. The content, if there is no control information of its own at this time, the relay node does not need to receive the following OFDM symbols, which can achieve the purpose of power saving, and More frequency diversity gains can be obtained.
  • the subset of OFDM symbols available for the intra relay link carries control information of the base station to the relay node link (the subset of OFDM symbols available for the relay link in this embodiment is the fourth and/or fifth) OFDM symbol).
  • the base station and the relay node agree to use the resource block corresponding to the PCFICH physical control format indication channel mapping subcarrier group for carrying control information of the base station to the relay node link and other control information for carrying the base station to the relay node link.
  • the number and location information of the resource blocks, which are identified by the national shaded area; the other resource blocks used to carry the control information of the base station to the relay node link refer to the 7th, 13th, and 19th resource blocks. , the figure is marked with a shaded area.
  • the time division is combined with the frequency division multiplexing mode, and the control information is carried on the discrete resource blocks in the OFDM symbol. Because the structure of the TDM distributed resource block is adopted, for the relay node, the relay node monitors the control channel. The content, if there is no control information of its own at this time, the relay node does not need to receive the following OFDM symbols, which can achieve the purpose of power saving, and can obtain more frequency diversity gain.
  • the base station and the relay node determine the number and location of the resource blocks that can be used to carry the control information of the base station to the relay node link according to the cell ID and the total number of resource blocks in the system.
  • the specific implementation method is as follows:
  • the cell ID is 9 bits binary "000111000", and the total number of downlink resource blocks is 50 RBs.
  • the base station and the relay node use the decimal ID of the cell ID to "50", and the specific decimal such as "000111000” is "56", then it is determined to be available
  • the location of the resource block carrying the control information of the base station to the relay node link is mod (56, 50), that is, the sixth resource block is determined to be a resource block that can be used to carry control information of the base station to the relay node link. Location; The sixth resource block is used to carry control information of the base station to the relay node link and other resource blocks of the control information for carrying the base station to the relay node link.
  • the base station and the relay node determine the number and location of the resource blocks that can be used to carry the control information of the base station to the relay node link according to the cell ID and the subframe number in the system, and the specific implementation method is as follows: for example, a certain cell ID For the 9bits binary "000111000”, the subframe number is "10", the base station and the relay node use the decimal ID of the above cell ID to "10”, and the specific decimal such as "000111000” is "56", then it is determined to be available.
  • the location of the resource block carrying the control information of the base station to the relay node link is mod (56, 10), that is, the sixth resource block is determined to be a resource block that can be used to carry control information of the base station to the relay node link. Location; The sixth resource block is used to carry control information of the base station to the relay node link and other resource blocks of the control information for carrying the base station to the relay node link.
  • control information of the base station to the relay node link may include control information of one relay node or multiple relay nodes; in addition, the control information may further include: uplink scheduling authorization control information under the relay node, and / Or the base station notifies the relay node that the control information of the resource can be utilized, and/or the base station notifies the control information of the terminal to which the relay node belongs.
  • the relay node After monitoring the uplink scheduling grant control information of the relay node, the relay node demodulates the corresponding service information according to the control information; if the base station is notified to notify the relay node that the resource control information is available, the relay node according to the control The information is allocated by the resource; if the base station is notified to notify the relay node of the terminal control information, the relay node forwards the control information to the corresponding terminal.
  • FIG. 9 is a schematic structural diagram of a system for implementing a method for transmitting a control link of a relay link according to the present invention, including a control channel mapping module on the base station side and a control channel demapping module on the relay node side.
  • the control channel mapping module is configured to perform control information bearer and control channel mapping by using frequency division multiplexing or time division combining frequency division multiplexing or time division multiplexing, and the base station to the relay node
  • the control information of the link is transmitted to the control channel demapping module;
  • the control channel demapping module is configured to receive and demap the control channel, thereby acquiring the control information.
  • the embodiment of the mapping manner of the control channel in the time direction and/or the frequency direction is the same as the above embodiment.
  • the base station transmits control information for carrying the base station to the relay node link.
  • the base station transmits the location start of the OFDM symbol for carrying the control information of the base station to the relay node link.
  • the position of the OFDM symbol that the relay node receives the control information for carrying the base station to the relay node link starts from the 5th OFDM symbol; for example, the number of downlink resource blocks is 50 resource blocks.
  • the location of the OFDM symbol transmitted by the base station for transmitting the control information of the base station to the relay node link starts from the 4th OFDM symbol, and the relay node receives the OFDM symbol for carrying the control information of the base station to the relay node link. The position starts at the 4th OFDM symbol.
  • the base station transmits the start position of the OFDM symbol for carrying the control information of the base station to the relay node link, and does not depend on the number of downlink resource blocks, for example, the base station transmits the base station to the relay node.
  • the position of the OFDM symbol of the link control information starts from the 4th OFDM symbol, and the position of the OFDM symbol that the relay node receives the control information for carrying the base station to the relay node link starts from the 4th OFDM. symbol.
  • the base station transmits a start position of the OFDM symbol for transmitting control information of the base station to the relay node link, and the relay node receives the base station to the relay node.
  • the starting position of the OFDM symbol of the control information of the link is obtained according to the signaling configuration.
  • the signaling may be broadcast signaling or dedicated signaling, and the broadcast signaling is preferably carried in a physical broadcast channel or system message of the relay link; the dedicated signaling is preferably carried in RRC (Radio) Resource control ).
  • RRC Radio

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Description

一种中继链^空制信道传输方法及系统 技术领域
本发明涉及中继传输技术，尤其涉及 3GPP中长期演进系统（ Long Term Evolution , LTE )、 高级的长期演进系统（ Long Term Evolution Advanced , LTE-A ) 中一种下行中继链路控制信道传输方法及系统。 背景技术
在正交频分复用 ( Orthogonal Frequency Division Multiplexing , OFDM ) 系统中， 由于是时频两维的数据形式， 所以控制信道与业务信道之间的复 用形式可以是时间方向上和频率方向上， 即采用时分复用 （Time Division Multiplex, TDM ) 方式和频分复用 （ Frequency Division Multiplex, FDM ) 方式。 在 LTE、 LTE-A中 RB ( Resource Block, 资源块； 资源块映射在物 理资源上则称为 Physical Resource Block, 物理资源块） 定义为在时间域上 连续 1个 slot (时隙 ) 内的 OFDM符号， 在频率域上连续 12或 24个子载 波， 所以 1个 RB由 Nsymb x N B个 RE ( Resource Element, 资源单元）， 其中 Nsymb表示 1个 slot内的 OFDM符号的个数， 表示资源块在频率域上连 续子载波的个数。
LTE系统、 LTE-A系统、高级的国际移动通信系统（ International Mobile Telecommunication Advanced, IMT- Advanced ) 是以 OFDM技术为基础， 在 OFDM系统中是时频两维的数据形式， 为了 UE端省电， 控制信道通常 采用 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 1个或前 2个或前 3个或前 4个 OFDM 符号作为控制信道，相应地，后 13个或后 12个或后 11个或后 10个 OFDM 符号作为业务信道。 首先以目前 LTE系统的控制信道为例进行说明， 例如在 LTE系统中， 下行控制信令主要包括以下内容：
1 )物理控制格式指示信道 ( Physical Control Format Indicator Channel, PCnCH );
2 ) 下行调度 4受权（ Downlink grant, DL grant );
3 )上行调度授权 ( UpLink grant, UL grant );
4 )物理 HARQ指示信道 ( Physical Hybrid Automatic Repeat Request Indicator Channel, PHICH ):；
可以看出控制信道的设计是由不同的组成部分构成的， 每个部分都有 其特定的功能。 为了方便描述， 下面定义几个术语及约定，
1 )指示几个 OFDM符号用于控制信道即 PCFICH, 与控制信道信元 ( Control Channels Elements , CCE )独立； PHICH也与 CCE独立；
2 )在频域上连续 L个子载波叫做 CCE, CCE可以包括 DL grant和 UL grant;
3 )所有的 CCE都采用正交相移键控 ( Quadrature Phase Shift Keying ,
QPSK )调制方式调制；
4 )每个控制信道是由一个 CCE或是多个 CCE组合构成；
5 )每个 UE能够监测一系列侯选控制信道；
6 )侯选控制信道的数目是盲检测的最大次数；
7 )侯选控制信道的数目大于 CCE的数目；
8 )收发两端规定好几种组合， 例如只有 1个或 2个或 4个或 8个 CCE 组合在一起作为侯选控制信道；
9 ) 1、 2、 4、 8组合分别对应不同编码速率；
在 eNode-B端， 将每个 UE的控制信息分别进行信道编码， 依次进行 QPSK调制， CCE到 RE ( Resource Element )的映射， 最后经快速傅里叶逆 变换（ Inverse Fast Fourier Transform, IFFT )后发射出去， 殳设此时控制信 道由 32个 CCE构成，接收端进行快速傅里叶逆变换（ Fast Fourier Transform, FFT ) 变换后， UE从组合为 1个 CCE开始进行盲检测 （即分别对 CCE0、
CCE1 CCE31进行盲检测）， 如果 UE_ID没有监听成功， 则从组合为 2个 CCE进行盲检测（即分别对 [CCEO CCE1]、 [CCE2 CCE3] [CCE30
CCE31] ),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, 说明此时没有属于自己的控制信令下达， 则 UE切换到睡眠模 式； 如果监听到和自己相匹配的 UE_ID, 则按照控制信令解调相对应的业 务信息。
B3G/4G的研究目标是汇集蜂窝、 固定无线接入、 游牧、 无线区域网络 等接入系统， 结合全 IP网络， 在高速和低速移动环境下分别为用户提供峰 值速率达 100Mbps以及 IGbps的无线传输能力， 并且实现蜂窝系统、 区域 性无线网络、 广播、 电视卫星通信的无缝衔接， 使得人类实现 "任何人在任 何时间、 任何地点与其他任何人实现任何方式的通信"。 中继（ Relay )技术 可以作为一项有效的措施应用起来， Relay技术既可以增加小区的覆盖也可 以增加小区容量。
在采用带内中继 （ inband-relay ) 时， 即 eNode-B到中继节点之间的链 路和中继节点到用户设备 UE ( User Equipment )之间的链路运作在相同的 频率资源上。 因为带内中继节点的发射机会对自己的接收机产生干扰（自 干扰 ), 所以 eNode-B到中继节点之间的链路和中继节点到 UE之间的链路 是不可能同时在相同的频率资源工作的， 除非有足够的信号分离和天线隔 离度。 相似的， 中继节点也不可能在接收 UE 所发射的数据的同时再给 eNode-B发射。
依照目前 LTE系统中的规定， 1个 10ms无线帧 （ frame ) 由 10个 1ms 的子帧 （subframe )构成， 可包括单播 Unicast子帧和多播广播 Multicast Broadcast子帧， 其中在采用频分双工 （ Frequency Division Duplex, FDD ) 方式时， #0、 #5子帧用作发射同步信号， 而 #4、 #9子帧用作寻呼 paging, 在采用时分双工 （Time Division Duplex, TDD )方式时， #0、 #5子帧用作 发射同步信号， 而 #1、 #6子帧用作寻呼 paging, 也就是说对于 FDD {#0、 #4、 #5、 #9}子帧， TDD{#0、 #1、 #5、 #6}子帧有上述特殊用途， 所以不能 用于多播广播单频网络 ( Multicast Broadcast Single Frequency Network, MBSFN )子帧的分配， 即在 1个无线帧里可分配的 MBSF 子帧最多为 6 个子帧。
一个可能的收发干扰问题的解决方法是使得中继节点在接收来自 eNode-B的数据时， 不向 UE进行发射操作， 也就是说在中继到 UE链路后 需要增加保护间隔时隙 （gap ), 在保护间隔时隙不进行任何操作， 仅用于 发收或收发状态转换。 目前在 LTE中采用 MBSFN 子帧用于中继子帧的传 输， 其具体的方式是： 多媒体控制实体（MBMS Control Entity, MCE )首 先给 eNode-B配置可用的 MBSF 子帧， eNode-B再在这些可用的 MBSFN 子帧中配置可用的中继子帧。 因此， 在下行时中继节点首先在前 1或 2个 OFDM符号给其下属的 UE发射控制信息 （包括上行发射数据的反馈信息 ACK/NACK( Acknowlegment/Negative Acknowlegment )和上行授权信息（ UL grant ),之后在 "gap"时间范围内完成发射到接收的切换，切换完成后在后面 的 OFDM符号接收来自 eNode-B的数据。
目前， 对于 MBSFN子帧 （subframe )作为中继子帧 （ relay subframe ) 的研究是一个热点， 但 eNode-B (基站）到中继节点 （Relay Node, RN ) 链路具体的控制信道结构及映射方式仍然是空白。 另外由于在下行时 RN 首先在前 1或 2个 OFDM符号给其下属的 UE发射控制信息， 而 eNode-B 是在前 1或 2或 3或 4个 OFDM符号给其直传 UE发射控制信息， RN无法 在前 1或 2个 OFDM符号内接收 eNode-B到 RN链路的控制信息， 而这些 问题正是该发明要解决的问题。 发明内容
有鉴于此， 本发明的主要目的之一在于提供一种中继链路控制信道传 输方法， 用于解决基站到中继节点链路上控制信道的映射及传输问题。 为 达到上述目的， 本发明的技术方案是这样实现的：
一种中继链路控制信道传输方法， 在基站到中继节点链路的子帧中采 用频分复用方式、 或时分结合频分复用方式、 或时分复用方式进行控制信 息的承载及控制信道的映射：
所述频分复用方式以频率方向上一个或多个资源块， 时间方向上子帧 内中继链路可用的 OFDM符号的全集承载基站到中继节点链路的控制信 息；
所述时分结合频分复用方式以频率方向上一个或多个资源块， 时间方 向上子帧内中继链路可用的 OFDM符号的子集承载基站到中继节点链路的 控制信息；
所述时分复用方式以频率方向上全部资源块， 时间方向上子帧内中继 链路可用的 OFDM符号的子集承载基站到中继节点链路的控制信息；
控制信道映射包括时间方向和 /或频率方向的映射。
进一步地， 所述频分复用方式以连续或离散的资源块， 且子帧内中继 链路可用的 OFDM符号的全集承载基站到中继节点链路的控制信息。
频分复用方式下控制信道在频率方向的映射方式为：
采用连续资源块， 且子帧内中继链路可用的 OFDM符号的全集对应的 控制信息承载方式承载基站到中继节点链路的控制信息； 该承载方式中， 基站和中继节点根据系统中小区 ID 和总的资源块数量或根据系统中小区 ID和子帧号确定可用于承载基站到中继节点链路的控制信息的资源块的数 量和位置， 在确定的可用于承载基站到中继节点链路的控制信息的资源块 中的一个或多个资源块上承载控制信息以及其它用于承载基站到中继节点 链路控制信, 的资源块的数量和位置信息；
或， 采用离散资源块， 且子帧内中继链路可用的 OFDM符号的全集对 应的控制信息承载方式承载基站到中继节点链路的控制信息； 该承载方式 中，基站和中继节点根据系统中小区 ID和总的资源块数量或根据系统中小 区 ID和子帧号确定可用于承载基站到中继节点链路的控制信息的资源块的 数量和位置， 且在确定的可用于承载基站到中继节点链路控制信息的资源 块中与 PCFICH物理控制格式指示信道映射子载波组对应的资源块上承载 控制信息以及其它用于承载基站到中继节点链路控制信息的资源块的数量 和位置信息。
进一步地， 所述时分结合频分复用方式以连续或离散的资源块， 且子 帧内中继链路可用的 OFDM符号的子集承载基站到中继节点链路的控制信 息。
在时分结合频分复用方式下控制信道在频率方向的映射为：
采用连续资源块， 且子帧内中继链路可用的 OFDM符号的子集对应的 控制信息承载方式承载基站到中继节点链路控制信息； 该承载方式中， 基 站和中继节点根据系统中小区 ID和总的资源块数量或根据系统中小区 ID 和子帧号确定可用于承载基站到中继节点链路控制信息的资源块的数量和 位置， 在确定的可用于承载基站到中继节点链路的控制信息的资源块中的 一个或多个资源块上承载控制信息以及其它用于承载基站到中继节点链路 控制信息的资源块的数量和位置信息；
或， 采用离散资源块， 且子帧内中继链路可用的 OFDM符号的子集对 应的控制信息承载方式承载基站到中继节点链路控制信息； 该承载方式中， 基站和中继节点根据系统中小区 ID 和总的资源块数量或根据系统中小区 ID和子帧号确定可用于承载基站到中继节点链路控制信息的资源块的数量 和位置， 在确定的可用于承载基站到中继节点链路控制信息的资源块中与
PCnCH物理控制格式指示信道映射子载波组对应的资源块上承载控制信 息以及其它用于承载基站到中继节点链路控制信息的资源块的数量和位置 信息。
进一步地， 所述时分复用方式以频率方向上全部资源块， 时间方向上 子帧内中继链路可用的 OFDM符号的子集承载基站到中继节点链路的控制 信息， 具体地， 是以 OFDM符号内全部频率资源承载控制信息。
进一步地， 时分结合频分复用方式或时分复用方式承载基站到中继节 点链路的控制信息的 OFDM符号的个数至少为 1个至多为 4个。
进一步地， 在时间方向上， 基站发射用于承载基站到中继节点链路的 控制信息的 OFDM符号的位置起始于第 4或第 5个 OFDM符号，其中当下 行资源块的数目小于等于 10时， 基站发射用于承载基站到中继节点链路的 控制信息的 OFDM符号的位置起始于第 5个 OFDM符号；否则基站发射用 于承载基站到中继节点链路的控制信息的 OFDM符号的位置起始于第 4个 OFDM符号；
中继节点接收用于承载基站到中继节点链路的控制信息的 OFDM符号 的位置起始于第 4或第 5个 OFDM符号， 其中当下行资源块的数目小于等 于 10时， 中继节点接收用于承载基站到中继节点链路的控制信息的 OFDM 符号的位置起始于第 5个 OFDM符号； 否则中继节点接收用于承载基站到 中继节点链路的控制信息的 OFDM符号的位置起始于第 4个 OFDM符号。
或， 在时间方向上， 基站发射用于承载基站到中继节点链路的控制信 息的 OFDM符号的位置均起始于第 4或第 5个 OFDM符号；中继节点接收 用于承载基站到中继节点链路的控制信息的 OFDM符号的位置均起始于第 4或第 5个 OFDM符号。
或， 在时间方向上， 基站发射用于承载基站到中继节点链路的控制信 息的 OFDM符号的起始位置以信令通知的方式进行配置； 中继节点接收用 于承载基站到中继节点链路的控制信息的 OFDM符号的起始位置根据信令 配置获取。
进一步地， 所述基站到中继节点链路的控制信息包括一个中继节点或 多个中继节点的控制信息； 所述控制信息还包括： 中继节点下上行调度 4受 权控制信息、 和 /或基站通知中继节点可利用资源的控制信息、 和 /或基站通 知中继节点所属终端的控制信息。
本发明的另一目的在于提供一种中继链路控制信道传输系统， 包括： 控制信道映射模块， 用于采用频分复用方式、 或时分结合频分复用方 式、 或时分复用方式进行控制信息的承载及控制信道的映射， 将基站到中 继节点链路的控制信息传送给控制信道解映射模块；
控制信道解映射模块， 用于接收并解映射所述控制信道， 从而获取所 述控制信息；
所述频分复用方式以频率方向上一个或多个资源块， 时间方向上子帧 内中继链路可用的 OFDM符号的全集承载基站到中继节点链路的控制信 息；
所述时分结合频分复用方式以频率方向上一个或多个资源块， 时间方 向上子帧内中继链路可用的 OFDM符号的子集承载基站到中继节点链路的 控制信息；
所述时分复用方式以频率方向上全部资源块， 时间方向上子帧内中继 链路可用的 OFDM符号的子集承载基站到中继节点链路的控制信息；
控制信道映射包括时间方向和 /或频率方向的映射。
所述系统中， 频分复用方式、 时分结合频分复用方式下， 控制信道在 时间方向和 /或频率方向的映射方式同方法技术方案中所采用的方式。
进一步地， 所述系统中， 时分结合频分复用方式或时分复用方式承载 基站到中继节点链路的控制信息的 OFDM符号的个数至少为 1个至多为 4 个。
进一步地， 所述系统中， 在时间方向上， 基站发射用于承载基站到中 继节点链路的控制信息的 OFDM符号的位置起始于第 4或第 5个 OFDM符 号， 其中当下行资源块的数目小于等于 10时， 基站发射用于承载基站到中 继节点链路的控制信息的 OFDM符号的位置起始于第 5个 OFDM符号；否 则基站发射用于承载基站到中继节点链路的控制信息的 OFDM符号的位置 起始于第 4个 OFDM符号； 中继节点接收用于承载基站到中继节点链路的 控制信息的 OFDM符号的位置起始于第 4或第 5个 OFDM符号，其中当下 行资源块的数目小于等于 10时， 中继节点接收用于承载基站到中继节点链 路的控制信息的 OFDM符号的位置起始于第 5个 OFDM符号；否则中继节 点接收用于承载基站到中继节点链路的控制信息的 OFDM符号的位置起始 于第 4个 OFDM符号。
或， 在时间方向上， 基站发射用于承载基站到中继节点链路的控制信 息的 OFDM符号的位置均起始于第 4或第 5个 OFDM符号；中继节点接收 用于承载基站到中继节点链路的控制信息的 OFDM符号的位置均起始于第 4或第 5个 OFDM符号。
或， 在时间方向上， 基站发射用于承载基站到中继节点链路的控制信 息的 OFDM符号的起始位置以信令通知的方式进行配置； 中继节点接收用 于承载基站到中继节点链路的控制信息的 OFDM符号的起始位置根据信令 配置获取。
本发明中， 中继链路控制信道结构及映射方式可以很好地适用于基站 到中继节点链路， 既保证了后项兼容性（兼容 LTE系统）， 也解决了中继节 点能够正确接收来自基站的控制信息的问题， 获得频率分集增益的效果， 此外时分复用方式还可以达到省电的目的， 频分复用方式和时分结合频分 复用方式还具有业务调度灵活的优点。 附图说明
图 1 为本发明实施例一以连续资源块， 且子帧内中继链路可用的 OFDM符号的全集承载控制信息的示意图；
图 2 为本发明实施例二以连续资源块， 且子帧内中继链路可用的
OFDM符号的全集承载控制信息的示意图；
图 3 为本发明实施例三以离散资源块， 且子帧内中继链路可用的 OFDM符号的全集承载控制信息的示意图；
图 4 为本发明实施例四以离散资源块， 且子帧内中继链路可用的 OFDM符号的全集承载控制信息的示意图；
图 5 为本发明实施例五以全部频率资源承载控制信息的示意图； 图 6 为本发明实施例六以连续资源块， 且子帧内中继链路可用的 OFDM符号的全集承载控制信息的示意图；
图 7 为本发明实施例七以不依赖于 PCFICH的离散资源块， 且子帧内 中继链路可用的 OFDM符号的子集承载控制信息示意图；
图 8 为本发明实施例八以依赖于 PCFICH的离散资源块， 且子帧内中 继链路可用的 OFDM符号的子集承载控制信息的示意图；
图 9为本发明实现中继链路控制信道传输方法的系统结构示意图。 具体实施方式
为使本发明的目的、 技术方案和优点更加清楚明白， 以下举实施例并 参照附图， 对本发明进一步详细说明。
实例一：
图 1为本发明以集中式（连续）资源块，且子帧内中继链路可用的 OFDM 符号的全集承载控制信息示意图。 以图示帧结构为基础， 可将某个子帧的 前 1个或前 2个或前 3个 OFDM符号用于承载基站到终端链路的控制信息。 本实施例中将前 3个 OFDM符号用于承载基站到终端链路的控制信息， 图 中用 阴影区域标识。 以第 6个、 第 7个、 第 8个、 第 9个和第 10个资源 块， 且子帧内中继链路可用的 OFDM符号的全集用于承载基站到中继节点 链路的控制信息 （本实施例中继链路可用的 OFDM符号的全集即为第 4个 OFDM符号到当前子帧的最后一个 OFDM符号）； 基站和中继节点根据系 统中小区 ID ( identity )和总的资源块数量或根据系统中小区 ID和子帧号 计算将第 6个资源块用于承载基站到中继节点链路的控制信息以及其它用 于承载基站到中继节点链路的控制信息的资源块的数量和位置信息， 图中 用國阴影区域标识； 所述其它用于承载基站到中继节点链路的控制信息的 资源块为第 7个、 第 8个、 第 9个和第 10个资源块， 图中用 ^阴影区域标 识； 在其它的资源块上承载基站到终端链路以及基站到中继节点链路业务 信息。
本实施例采用频分复用方式， 以连续的资源块且子帧内中继链路可用 的 OFDM符号的全集承载基站到中继节点链路的控制信息， 由于采用集中 式资源块的结构， 不影响基站到终端的链路， 所以该方式调度灵活。
实例二：
图 2为本发明以集中式（连续）资源块且子帧内中继链路可用的 OFDM 符号的全集承载控制信息的示意图， 以图示帧结构为基础， 可将某个子帧 的前 1或 2或 3或 4个 OFDM符号用于承载基站到终端链路的控制信息， 本实施例中将前 4个 OFDM符号用于承载基站到终端链路的控制信息， 图 中用國阴影区域标识； 以第 16个、 第 17个、 第 18个、 第 19个和第 20个 资源块且子帧内中继链路可用的 OFDM符号的全集承载基站到中继节点链 路的控制信息 （本实施例中继链路可用的 OFDM符号的全集即为第 5 个 OFDM符号到当前子帧的最后一个 OFDM符号）； 基站和中继节点根据系 统中小区 ID ( identity )和总的资源块数量或根据系统中小区 ID和子帧号 经过计算后， 以第 16个、 第 17个、 第 18个、 第 19个和第 20个资源块用 于承载基站到中继节点链路的控制信息， 图中用 阴影区域标识； 在其它 的资源块上承载基站到终端链路以及基站到中继节点链路业务信息。
本实施例采用频分复用方式， 以连续的资源块， 且子帧内中继链路可 用的 OFDM符号的全集承载基站到中继节点链路的控制信息， 由于采用集 中式资源块的结构， 没有影响基站到终端的链路， 所以该方式调度灵活。
实例三：
图 3为本发明不依赖于 PCFICH的以分布式（离散） 资源块且子帧内 中继链路可用的 OFDM符号的全集承载控制信息示意图。 以图示帧结构为 基础， 可将某个子帧的前 1个或前 2个或前 3个 OFDM符号用于承载基站 到终端链路的控制信息， 本实施例中以前 3个 OFDM符号承载基站到终端 链路的控制信息， 图中用 阴影区域标识， 以第 6个、 第 10个、 第 14个、 第 18个和第 22个资源块， 且子帧内中继链路可用的 OFDM符号的全集承 载基站到中继节点链路的控制信息 （本实施例中继链路可用的 OFDM符号 的全集即为第 4个 OFDM符号到当前子帧的最后一个 OFDM符号）； 基站 和中继节点根据系统中小区 ID ( identity )和总的资源块数量或根据系统中 小区 ID和子帧号计算将第 6个资源块用于承载基站到中继节点链路的控制 信息以及其它用于承载基站到中继节点链路的控制信息的资源块的数量和 位置信息， 图中用國阴影区域标识； 所述其它用于承载基站到中继节点链 路的控制信息的资源块指第 10个、 第 14个、 第 18个和 22个资源块， 图 中用^阴影区域标识； 在其它的资源块上承载基站到终端链路以及基站到 中继节点链路业务信息。
本实施例采用频分复用方式， 以离散的资源块， 且子帧内中继链路可 用的 OFDM符号的全集承载基站到中继节点链路的控制信息， 由于采用分 布式资源块的结构， 因为没有影响基站到终端的链路， 所以该方式调度灵 活， 且可以获得更多的频率分集增益。
实例四：
图 4为本发明以依赖于 PCFICH的分布式（离散） 资源块， 且子帧内 中继链路可用的 OFDM符号的全集承载控制信息示意图。 以图示帧结构为 基础， 可将某个子帧的前 1个或前 2个或前 3个 OFDM符号用于承载基站 到终端链路的控制信息， 本实施例中将前 3个 OFDM符号用于承载基站到 终端链路的控制信息， 图中用 阴影区域标识； 以第 4个、 第 7个、 第 10 个、 第 13个、 第 16个、 第 19个和第 22个资源块， 且子帧内中继链路可 用的 OFDM符号的全集用于承载基站到中继节点链路的控制信息 （本实施 例中继链路可用的 OFDM符号的全集即为第 4个 OFDM符号到当前子帧的 最后一个 OFDM符号）;基站和中继节点约定将与 PCFICH物理控制格式指 示信道映射子载波组对应的资源块用于承载基站到中继节点链路的控制信 息以及其它用于承载基站到中继节点链路的控制信息的资源块的数量和位 置信息， 图中用國阴影区域标识； PCFICH物理控制格式指示信道映射子载 波组对应的资源块分别为第 4、 第 10、 第 16和第 22个资源块， 图中用圖阴 影区域标识； 所述其它用于承载基站到中继节点链路的控制信息的资源块 指第 7个、 第 13个和第 19个资源块， 图中用 ^阴影区域标识； 在其它空 白的资源块上承载基站到终端链路以及基站到中继节点链路业务信息。
本实施例采用频分复用方式， 以离散的资源块， 且子帧内中继链路可 用的 OFDM符号的全集承载基站到中继节点链路的控制信息， 由于采用分 布式资源块的结构， 因为没有影响基站到终端的链路， 所以该方式调度灵 活， 且可以获得更多的频率分集增益。
实例五：
图 5为本发明以中继链路可用的 OFDM符号的子集承载基站到中继节 点链路的控制信息， 即以全部频率资源都用于承载控制信息的示意图 （本 实施例中继链路可用的 OFDM符号的子集即为第 4个和 /或第 5个 OFDM 符号）， 以图示帧结构为基础， 可将某个子帧的前 1个或前 2个或前 3个 OFDM符号用于承载基站到终端链路的控制信息， 将第 4个和 /或第 5个 OFDM符号的全部频率资源用于承载基站到中继节点链路的控制信息。 本 实施例将前 3个 OFDM符号用于承载基站到终端链路的控制信息， 图中用 國阴影区域标识；将第 4个和 /或第 5个 OFDM符号的全部频率资源用于承 载基站到中继节点链路的控制信息， 图中用 Ξ阴影区域标识。 在其它空白 的资源块上承载基站到终端链路以及基站到中继节点链路业务信息。
本实施例采用时分复用方式， 在连续的 OFDM符号上以全部频率承载 基站到中继节点链路的控制信息， 由于采用 TDM全部频率资源的结构， 所 以对于中继节点来说， 中继节点监听控制信道中的内容， 如果此时没有属 于自己的控制信息， 则中继节点不用再接收后面的 OFDM符号， 可以达到 省电的目的。
实例六：
图 6为本发明以集中式（连续）资源块，且子帧内中继链路可用的 OFDM 符号的子集承载控制信息的示意图， 以图示帧结构为基础， 可将某个子帧 的前 1个或前 2个或前 3个 OFDM符号用于承载基站到终端链路的控制信 息，将第 4个和 /或第 5个 OFDM符号的集中式资源块用于承载基站到中继 节点链路的控制信息。 本实施例将前 3个 OFDM符号用于承载基站到终端 链路的控制信息， 图中用國阴影区域标识； 将第 4个和 /或第 5个 OFDM 符号的集中式资源块用于承载基站到中继节点链路的控制信息， 即第 6个 到第 20个资源块，且子帧内中继链路可用的 OFDM符号的子集用于承载基 站到中继节点链路的控制信息 （本实施例中继链路可用的 OFDM符号的子 集即为第 4个和 /或第 5个 OFDM符号）， 图中用 阴影区域标识。 在其它 ：白的资源块上承载基站到终端链路以及基站到中继节点链路业务信息。 本实施例采用时分结合频分复用方式， 在 OFDM符号内连续的资源块 上承载控制信息， 由于采用 TDM集中式资源块的结构， 所以对于中继节点 来说， 中继节点监听控制信道中的内容， 如果此时没有属于自己的控制信 息， 则中继节点不用再接收后面的 OFDM符号， 可以达到省电的目的。
实例七：
图 7为本发明以不依赖于 PCFICH的分布式（离散） 资源块， 且子帧 内中继链路可用的 OFDM符号的子集承载控制信息示意图， 以图示帧结构 为基础， 可将某个子帧的前 1个或前 2个或前 3个 OFDM符号用于 7|载基 站到终端链路的控制信息， 图中用固阴影区域标识； 将第 4个和 /或第 5个
OFDM符号的分布式资源块用于承载基站到中继节点链路的控制信息， 即 第 6个、 第 10个、 第 14个、 第 18个和第 22个资源块， 且子帧内中继链 路可用的 OFDM符号的子集用于承载基站到中继节点链路的控制信息 （本 实施例中继链路可用的 OFDM符号的子集为第 4个和 /或第 5个 OFDM符 号）。基站和中继节点根据系统中小区 ID ( identity )和总的资源块数量或根 据系统中小区 ID和子帧号计算将第 6个资源块用于承载基站到中继节点链 路的控制信息以及其它用于承载基站到中继节点链路的控制信息的资源块 的数量和位置信息， 图中用國阴影区域标识； 所述其它用于承载基站到中 继节点链路的控制信息的资源块指 10个、 第 14个、 第 18个和第 22个资 源块， 图中用 阴影区域标识。 在其它空白的资源块上承载基站到终端链 路以及基站到中继节点链路业务信息。
本实施例采用时分结合频分复用方式， 在 OFDM符号内离散的资源块 上承载控制信息， 由于采用 TDM分布式资源块的结构， 所以对于中继节点 来说， 中继节点监听控制信道中的内容， 如果此时没有属于自己的控制信 息， 则中继节点不用再接收后面的 OFDM符号， 可以达到省电的目的， 且 可以获得更多的频率分集增益。
实例八：
图 8为本发明以依赖于 PCFICH的分布式（离散） 资源块， 且子帧内 中继链路可用的 OFDM符号的子集承载控制信息的示意图， 以图示帧结构 为基础， 可将某个子帧的前 1个或前 2个或前 3个 OFDM符号用于 7|载基 站到终端链路的控制信息，图中用 阴影区域标识；将第 4和 /或 5个 OFDM 符号位的分布式资源块用于承载基站到中继节点链路的控制信息； 以第 4 个、 第 7个、 第 10个、 第 13个、 第 16个、 第 19个和第 22个资源块， 且 子帧内中继链路可用的 OFDM符号的子集承载基站到中继节点链路的控制 信息（本实施例中继链路可用的 OFDM符号的子集即为第 4个和 /或第 5个 OFDM符号）。基站和中继节点约定将与 PCFICH物理控制格式指示信道映 射子载波组对应的资源块用于承载基站到中继节点链路的控制信息以及其 它用于承载基站到中继节点链路的控制信息的资源块的数量和位置信息， 图中用國阴影区域标识； 所述其它用于承载基站到中继节点链路的控制信 息的资源块指第 7个、 第 13个和第 19个资源块， 图中用 ^阴影区域标识。
本实施例采用时分结合频分复用方式， 在 OFDM符号内离散的资源块 上承载控制信息， 由于采用 TDM分布式资源块的结构， 所以对于中继节点 来说， 中继节点监听控制信道中的内容， 如果此时没有属于自己的控制信 息， 则中继节点不用再接收后面的 OFDM符号， 可以达到省电的目的， 且 可以获得更多的频率分集增益。
本发明中， 基站和中继节点根据系统中小区 ID和总的资源块数量确定 可用于承载基站到中继节点链路的控制信息的资源块的数量和位置， 具体 实现方法举例如下： 例如某个小区 ID为 9bits的二进制 "000111000" , 下 行总的资源块数量为 50个 RBs, 基站和中继节点利用上述小区 ID的十进 制对 "50" 求模， 具体的如 "000111000" 的十进制为 "56" , 则确定可用 于承载基站到中继节点链路的控制信息的资源块的位置为 mod ( 56, 50 ), 即第 6个资源块确定为可用于承载基站到中继节点链路的控制信息的资源 块的位置； 第 6个资源块用于承载基站到中继节点链路的控制信息以及其 它用于承载基站到中继节点链路的控制信息的资源块的数量和位置信息。
本发明中， 基站和中继节点根据系统中小区 ID和子帧号确定可用于承 载基站到中继节点链路的控制信息的资源块的数量和位置， 具体实现方法 举例如下：例如某个小区 ID为 9bits的二进制 "000111000" ,子帧号为 "10" , 基站和中继节点利用上述小区 ID 的十进制对 " 10" 求模， 具体的如 "000111000" 的十进制为 "56" , 则确定可用于承载基站到中继节点链路 的控制信息的资源块的位置为 mod ( 56, 10 ), 即第 6个资源块确定为可用 于承载基站到中继节点链路的控制信息的资源块的位置； 第 6个资源块用 于承载基站到中继节点链路的控制信息以及其它用于承载基站到中继节点 链路的控制信息的资源块的数量和位置信息。
本发明中， 基站到中继节点链路的控制信息可包括一个中继节点或多 个中继节点的控制信息； 此外， 控制信息还可包括： 中继节点下上行调度 授权控制信息、 和 /或基站通知中继节点可利用资源的控制信息、 和 /或基站 通知中继节点所属终端的控制信息。 中继节点如果监听到中继节点下上行 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； 如果监听到 基站通知中继节点可利用资源控制信息， 则该中继节点根据该控制信息进 行资源分配； 如果监听到基站通知中继节点所属终端控制信息， 则该中继 节点将该控制信息转发给对应终端。
图 9为本发明实现中继链路控制信道传输方法的系统结构示意图， 包 括基站侧的控制信道映射模块和中继节点侧的控制信道解映射模块。
控制信道映射模块用于采用频分复用方式或时分结合频分复用方式或 时分复用方式进行控制信息的承载及控制信道的映射， 将基站到中继节点 链路的控制信息传送给控制信道解映射模块； 控制信道解映射模块用于接 收并解映射所述控制信道， 从而获取所述控制信息。 在所述系统中， 在频 分复用方式、 时分结合频分复用方式下， 控制信道在时间方向和 /或频率方 向的映射方式的实施例与上述实施例相同。
实例九：
在时间方向上， 基站发射用于承载基站到中继节点链路的控制信息的
OFDM符号的起始位置取决于下行资源块的数目时， 例如下行资源块的数 目为 6个资源块， 则基站发射用于承载基站到中继节点链路的控制信息的 OFDM符号的位置起始于第 5个 OFDM符号， 中继节点接收用于承载基站 到中继节点链路的控制信息的 OFDM符号的位置起始于第 5个 OFDM符 号； 例如下行资源块的数目为 50个资源块， 则基站发射用于承载基站到中 继节点链路的控制信息的 OFDM符号的位置起始于第 4个 OFDM符号，中 继节点接收用于承载基站到中继节点链路的控制信息的 OFDM符号的位置 起始于第 4个 OFDM符号。
或， 在时间方向上， 基站发射用于承载基站到中继节点链路的控制信 息的 OFDM符号的起始位置不取决于下行资源块的数目时， 例如基站发射 用于承载基站到中继节点链路的控制信息的 OFDM符号的位置均起始于第 4个 OFDM符号， 中继节点接收用于承载基站到中继节点链路的控制信息 的 OFDM符号的位置均起始于第 4个 OFDM符号。
或， 在时间方向上， 基站发射用于承载基站到中继节点链路的控制信 息的 OFDM符号的起始位置以信令通知的方式进行配置， 中继节点接收用 于承载基站到中继节点链路的控制信息的 OFDM符号的起始位置根据信令 配置获取。
优选地， 该信令可以是广播信令或是专用信令， 广播信令优选承载在 中继链路的物理广播信道或系统消息中； 专用信令优选承载在 RRC ( Radio resource control )信令中。
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 变形， 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。

Claims

权利要求书
1、 一种中继链路控制信道传输方法， 其特征在于， 在基站到中继节点 链路的子帧中采用频分复用方式、 或时分结合频分复用方式、 或时分复用 方式， 进行控制信息的承载及控制信道的映射； 其中，
所述频分复用方式以频率方向上一个或多个资源块， 时间方向上子帧 内中继链路可用的正交频分复用（OFDM )符号的全集，承载基站到中继节 点链路的控制信息；
所述时分结合频分复用方式以频率方向上一个或多个资源块， 时间方 向上子帧内中继链路可用的 OFDM符号的子集， 承载基站到中继节点链路 的控制信息；
所述时分复用方式以频率方向上全部资源块， 时间方向上子帧内中继 链路可用的 OFDM符号的子集， 承载基站到中继节点链路的控制信息； 所述控制信道映射包括时间方向和 /或频率方向的映射。
2、 根据权利要求 1所述的方法， 其特征在于， 所述频分复用方式以连 续或离散的资源块， 且子帧内中继链路可用的 OFDM符号的全集承载基站 到中继节点链路的控制信息。
3、 根据权利要求 2所述的方法， 其特征在于， 所述控制信道在频率方 向的映射为：
采用连续资源块， 且子帧内中继链路可用的 OFDM符号的全集对应的 控制信息承载方式承载基站到中继节点链路的控制信息； 该承载方式中， 基站和中继节点根据系统中小区 ID和总的资源块数量、 或根据系统中小区 ID和子帧号， 确定可用于承载基站到中继节点链路的控制信息的资源块的 数量和位置， 在确定的可用于承载基站到中继节点链路的控制信息的资源 块中的一个或多个资源块上， 承载控制信息以及其它用于承载基站到中继 节点链路控制信息的资源块的数量和位置信息；
或， 采用离散资源块， 且子帧内中继链路可用的 OFDM符号的全集对 应的控制信息承载方式承载基站到中继节点链路的控制信息； 该承载方式 中， 基站和中继节点根据系统中小区 ID和总的资源块数量、 或根据系统中 小区 ID和子帧号， 确定可用于承载基站到中继节点链路的控制信息的资源 块的数量和位置， 且在确定的可用于承载基站到中继节点链路控制信息的 资源块中与 PCFICH物理控制格式指示信道映射子载波组对应的资源块上， 承载控制信息以及其它用于承载基站到中继节点链路控制信息的资源块的 数量和位置信息。
4、 根据权利要求 1所述的方法， 其特征在于， 所述时分结合频分复用 方式以连续或离散的资源块， 且子帧内中继链路可用的 OFDM符号的子集 承载基站到中继节点链路的控制信息。
5、 根据权利要求 4所述的方法， 其特征在于， 所述控制信道在频率方 向的映射为：
采用连续资源块， 且子帧内中继链路可用的 OFDM符号的子集对应的 控制信息承载方式承载基站到中继节点链路控制信息； 该承载方式中， 基 站和中继节点根据系统中小区 ID和总的资源块数量、或根据系统中小区 ID 和子帧号， 确定可用于承载基站到中继节点链路控制信息的资源块的数量 和位置， 在确定的可用于承载基站到中继节点链路的控制信息的资源块中 的一个或多个资源块上， 承载控制信息及其它用于承载基站到中继节点链 路控制信息的资源块的数量和位置信息；
或， 采用离散资源块， 且子帧内中继链路可用的 OFDM符号的子集对 应的控制信息承载方式承载基站到中继节点链路控制信息； 该承载方式中， 基站和中继节点根据系统中小区 ID和总的资源块数量、 或根据系统中小区 ID和子帧号， 确定可用于承载基站到中继节点链路控制信息的资源块的数 量和位置， 在确定的可用于承载基站到中继节点链路控制信息的资源块中 与 PCFICH物理控制格式指示信道映射子载波组对应的资源块上承载控制 信息及其它用于承载基站到中继节点链路控制信息的资源块的数量和位置 信息。
6、 根据权利要求 1所述的方法， 其特征在于， 所述时分复用方式以频 集承载基站到中继节点链路的控制信息。
7、 根据权利要求 4至 6任一项所述的方法， 其特征在于， 承载基站到 中继节点链路的控制信息的 OFDM符号的个数至少为 1个、 至多为 4个。
8、 根据权利要求 1所述的方法， 其特征在于， 在时间方向上， 基站发 射用于承载基站到中继节点链路的控制信息的 OFDM符号的位置起始于第 4或第 5个 OFDM符号， 其中当下行资源块的数目小于等于 10时， 基站发 射用于承载基站到中继节点链路的控制信息的 OFDM符号的位置起始于第 5个 OFDM符号， 否则基站发射用于承载基站到中继节点链路的控制信息 的 OFDM符号的位置起始于第 4个 OFDM符号；
中继节点接收用于承载基站到中继节点链路的控制信息的 OFDM符号 的位置起始于第 4或第 5个 OFDM符号， 其中当下行资源块的数目小于等 于 10时， 中继节点接收用于承载基站到中继节点链路的控制信息的 OFDM 符号的位置起始于第 5个 OFDM符号， 否则中继节点接收用于承载基站到 中继节点链路的控制信息的 OFDM符号的位置起始于第 4个 OFDM符号； 或， 在时间方向上， 基站发射用于承载基站到中继节点链路的控制信 息的 OFDM符号的位置均起始于第 4或第 5个 OFDM符号；中继节点接收 用于承载基站到中继节点链路的控制信息的 OFDM符号的位置均起始于第 4或第 5个 OFDM符号；
或， 在时间方向上， 基站发射用于承载基站到中继节点链路的控制信 息的 OFDM符号的起始位置以信令通知的方式进行配置； 中继节点接收用 于承载基站到中继节点链路的控制信息的 OFDM符号的起始位置根据信令 配置获取。
9、 根据权利要求 1所述的方法， 其特征在于， 所述基站到中继节点链 路的控制信息包括一个中继节点或多个中继节点的控制信息；
所述控制信息还包括： 中继节点下上行调度 4受权控制信息、 和 /或基站 通知中继节点可利用资源的控制信息、 和 /或基站通知中继节点所属终端的 控制信息。
10、 一种中继链路控制信道传输系统， 其特征在于， 包括： 控制信道映射模块， 用于采用频分复用方式、 或时分结合频分复用方 式、 或时分复用方式， 进行控制信息的承载及控制信道的映射， 将基站到 中继节点链路的控制信息传送给控制信道解映射模块；
控制信道解映射模块， 用于接收并解映射所述控制信道， 获取所述控 制信息；
所述频分复用方式以频率方向上一个或多个资源块， 时间方向上子帧 内中继链路可用的 OFDM符号的全集， 承载基站到中继节点链路的控制信 息；
所述时分结合频分复用方式以频率方向上一个或多个资源块， 时间方 向上子帧内中继链路可用的 OFDM符号的子集， 承载基站到中继节点链路 的控制信息；
所述时分复用方式以频率方向上全部资源块， 时间方向上子帧内中继 链路可用的 OFDM符号的子集， 承载基站到中继节点链路的控制信息； 所述控制信道映射包括时间方向和 /或频率方向的映射。
11、 根据权利要求 10所述的系统， 其特征在于，
所述频分复用方式以连续或离散的资源块， 且子帧内中继链路可用的 OFDM符号的全集承载基站到中继节点链路的控制信息。
12、 根据权利要求 11所述的系统， 其特征在于， 所述控制信道在频率 方向的映射为：
采用连续资源块， 且子帧内中继链路可用的 OFDM符号的全集对应的 控制信息承载方式承载基站到中继节点链路的控制信息； 该承载方式中， 基站和中继节点根据系统中小区 ID和总的资源块数量、 或根据系统中小区 ID和子帧号， 确定可用于承载基站到中继节点链路的控制信息的资源块的 数量和位置， 在确定的可用于承载基站到中继节点链路的控制信息的资源 块中的一个或多个资源块上承载控制信息及其它用于承载基站到中继节点 链路控制信, 的资源块的数量和位置信息；
或， 采用离散资源块， 且子帧内中继链路可用的 OFDM符号的全集对 应的控制信息承载方式承载基站到中继节点链路的控制信息； 该承载方式 中， 基站和中继节点根据系统中小区 ID和总的资源块数量、 或根据系统中 小区 ID和子帧号， 确定可用于承载基站到中继节点链路的控制信息的资源 块的数量和位置， 且在确定的可用于承载基站到中继节点链路控制信息的 资源块中与 PCFICH物理控制格式指示信道映射子载波组对应的资源块上 承载控制信息及其它用于承载基站到中继节点链路控制信息的资源块的数 量和位置信息。
13、 根据权利要求 10所述的系统， 其特征在于， 所述时分结合频分复 用方式以连续或离散的资源块， 且子帧内中继链路可用的 OFDM符号的子 集承载基站到中继节点链路的控制信息。
14、 根据权利要求 13所述的系统， 其特征在于， 所述控制信道在频率 方向的映射为：
采用连续资源块， 且子帧内中继链路可用的 OFDM符号的子集对应的 控制信息承载方式承载基站到中继节点链路控制信息； 该承载方式中， 基 站和中继节点根据系统中小区 ID和总的资源块数量、或根据系统中小区 ID 和子帧号， 确定可用于承载基站到中继节点链路控制信息的资源块的数量 和位置， 在确定的可用于承载基站到中继节点链路的控制信息的资源块中 的一个或多个资源块上承载控制信息以及其它用于承载基站到中继节点链 路控制信息的资源块的数量和位置信息；
采用离散资源块， 且子帧内中继链路可用的 OFDM符号的子集对应的 控制信息承载方式承载基站到中继节点链路控制信息； 该承载方式中， 基 站和中继节点根据系统中小区 ID和总的资源块数量、或根据系统中小区 ID 和子帧号， 确定可用于承载基站到中继节点链路控制信息的资源块的数量 和位置， 在确定的可用于承载基站到中继节点链路控制信息的资源块中与 PCnCH物理控制格式指示信道映射子载波组对应的资源块上承载控制信 息及其它用于承载基站到中继节点链路控制信息的资源块的数量和位置信 息。
15、 根据权利要求 10所述的系统， 其特征在于， 所述时分复用方式以 子集承载基站到中继节点链路的控制信息。
16、 根据权利要求 13至 15任一项所述的系统， 其特征在于， 承载基 站到中继节点链路的控制信息的 OFDM符号的个数至少为 1个、 至多为 4 个。
17、 根据权利要求 10所述的系统， 其特征在于， 在时间方向上， 基站 发射用于承载基站到中继节点链路的控制信息的 OFDM符号的位置起始于 第 4或第 5个 OFDM符号，其中当下行资源块的数目小于等于 10时，基站 发射用于承载基站到中继节点链路的控制信息的 OFDM符号的位置起始于 第 5个 OFDM符号， 否则基站发射用于承载基站到中继节点链路的控制信 息的 OFDM符号的位置起始于第 4个 OFDM符号；
中继节点接收用于承载基站到中继节点链路的控制信息的 OFDM符号 的位置起始于第 4或第 5个 OFDM符号， 其中当下行资源块的数目小于等 于 10时， 中继节点接收用于承载基站到中继节点链路的控制信息的 OFDM 符号的位置起始于第 5个 OFDM符号， 否则中继节点接收用于承载基站到 中继节点链路的控制信息的 OFDM符号的位置起始于第 4个 OFDM符号； 或， 在时间方向上， 基站发射用于承载基站到中继节点链路的控制信 息的 OFDM符号的位置均起始于第 4或第 5个 OFDM符号；中继节点接收 用于承载基站到中继节点链路的控制信息的 OFDM符号的位置均起始于第 4或第 5个 OFDM符号；
或， 在时间方向上， 基站发射用于承载基站到中继节点链路的控制信 息的 OFDM符号的起始位置以信令通知的方式进行配置； 中继节点接收用 于承载基站到中继节点链路的控制信息的 OFDM符号的起始位置根据信令 配置获取。
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