WO2013000411A1 - 确定控制信道资源的方法和用户设备 - Google Patents

确定控制信道资源的方法和用户设备 Download PDF

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Publication number
WO2013000411A1
WO2013000411A1 PCT/CN2012/077637 CN2012077637W WO2013000411A1 WO 2013000411 A1 WO2013000411 A1 WO 2013000411A1 CN 2012077637 W CN2012077637 W CN 2012077637W WO 2013000411 A1 WO2013000411 A1 WO 2013000411A1
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WIPO (PCT)
Prior art keywords
control channel
antenna port
logic unit
information
user equipment
Prior art date
Application number
PCT/CN2012/077637
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English (en)
French (fr)
Inventor
刘江华
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP17205613.7A priority Critical patent/EP3386137B1/en
Priority to EP12805275.0A priority patent/EP2717506B1/en
Priority to RU2014102364/08A priority patent/RU2585983C2/ru
Priority to JP2014517422A priority patent/JP5819524B2/ja
Priority to AU2012278342A priority patent/AU2012278342B2/en
Priority to PL19209930T priority patent/PL3700117T3/pl
Priority to EP19209930.7A priority patent/EP3700117B1/en
Publication of WO2013000411A1 publication Critical patent/WO2013000411A1/zh
Priority to US14/141,014 priority patent/US9825837B2/en
Priority to US15/786,929 priority patent/US10263874B2/en
Priority to US16/356,885 priority patent/US10601694B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/12—Network monitoring probes

Definitions

  • the present invention relates to the field of communications, and more particularly to a method and user equipment for determining control channel resources in the field of communications.
  • LTE 8/9/10 Long Term Evolution (LTE) 8/9/10 (Release 8/9/10, referred to as “Rel-8/9/10”) communication system uses dynamic scheduling technology to Improving the performance of the communication system, that is, an Evolved NodeB (“eNB") performs scheduling and resource allocation according to the channel condition of each user equipment (User Equipment, referred to as "UE"), so that each scheduled user The devices are all transmitting on their optimal channel.
  • the eNB sends a physical downlink shared channel (Physical Downlink Shared Channel, referred to as "PDSCH”) and a corresponding physical downlink control channel (Physical Downlink Control Channel) for each scheduled user equipment according to the result of the dynamic scheduling.
  • PDSCH Physical Downlink Shared Channel
  • Physical Downlink Control Channel Physical Downlink Control Channel
  • the PDCCH is carried by the eNB, and the PDCCH is mainly used to indicate the transmission format of the corresponding PDSCH, that is, the scheduling information, including the allocation of resources, the size of the transport block, and the modulation and coding manner. , transmission rank, precoding matrix information, and so on.
  • the PDCCH and the PDSCH are time-division multiplexed in one subframe, so the number of PDCCHs that can be supported by one subframe is limited, that is, the number of user equipments scheduled by the base station is limited.
  • the capacity limitation problem of PDCCH is more prominent in the further evolution of the LTE Rel-10 communication system.
  • the evolved system usually applies Multiple Input Multiple Output (MIMO) technology to improve the spectrum efficiency of the communication system, which means the number of user equipments scheduled by the base station at the same time. Increased, so more PDCCH is needed.
  • MIMO Multiple Input Multiple Output
  • a very important scenario considered in the evolution system is a heterogeneous network.
  • a specific implementation of the scenario is to set a plurality of remote radio units in addition to the macro base station within the coverage of a macro cell ( Remote Radio Unit (referred to as "RRU"), these RRUs have the same cell identity as the macro cell in which they are located, and the PDCCH adopts a transmission method based on a Demodulation Reference Signal (DMRS), so each RRU can serve some user equipment separately.
  • DMRS Demodulation Reference Signal
  • each RRU is transparent to the user equipment, and thus the number of user equipments scheduled by the base station is greatly increased in this scenario, thereby also increasing the capacity of the required PDCCH.
  • the communication system enhances the existing PDCCH, that is, allocates a part of resources in the original PDSCH area for transmitting the enhanced PDCCH, that is, enhancing the physical downlink control channel.
  • E-PDCCH Enhanced Physical Downlink Control Channel
  • the resources allocated to the control channel have great flexibility, and the capacity of the PDCCH is increased.
  • the E-PDCCH can also adopt a DMRS-based transmission mode, which can realize spatial reuse to improve the transmission efficiency of the control channel.
  • the control channel of the user equipment serving different RRUs can occupy the same time-frequency resources, as long as it is spatially isolated.
  • Hybrid Automatic Repeat Request (HARQ) technology is usually used to improve the performance of the communication system, and the HARQ technology will continue to be applied in the evolution.
  • HARQ Hybrid Automatic Repeat Request
  • the communication system for example, it is applied to LTE Rel-11. Since the dynamically scheduled user equipment needs to provide uplink feedback confirmation to the eNB
  • ACK Acknowledgement, abbreviated as "ACK”
  • NACK Non-Acknowledgement
  • the dynamically scheduled user equipment needs to determine the resources of the uplink feedback ACK/NACK information.
  • the resource for uplink ACK/NACK information needs to adopt a dynamic reservation method, that is, when the PDSCH is scheduled, resources are reserved, and the method of semi-static reservation is not suitable.
  • the technical problem to be solved is when the user equipment detects the E-PDCCH and After the PDSCH, how to dynamically determine the resources used for uplink feedback ACK/NACK information.
  • the feedback of the ACK/NACK information is on the Physical Uplink Control Channel (PUCCH).
  • PUCCH Physical Uplink Control Channel
  • the above is performed in a code division multiplexing manner, that is, each user equipment modulates the ACK/NACK information by a time-frequency two-dimensional spreading sequence, where for each dynamically scheduled user equipment,
  • the resource used for uplink feedback ACK/NACK information is the control channel unit of the PDCCH (Control Channel
  • CCE sequence number of Element
  • the E-PDCCHs based on DMRS transmissions of different RRUs may occupy the same time-frequency resource and different DMRS ports, and different E-PDCCHs may have the same control channel logical label or serial number, which may result in different users.
  • the problem of conflicting resources between ACK/NACK information between devices is that two or more user equipments occupy the same resources, thereby causing interference to ACK/NACK information between different user equipments.
  • the embodiment of the present invention provides a method for determining a control channel resource and a user equipment, which can dynamically determine resources for uplink feedback ACK/NACK information, and can avoid resource conflict between different user equipments.
  • the embodiment of the present invention provides a method for determining a control channel resource, where the method includes: detecting, by a base station, a downlink control channel that carries scheduling information of a downlink data channel, where the downlink control channel is formed by at least one control channel logic unit.
  • mapping the at least one control channel logic unit to the at least one antenna port acquiring at least one of antenna port information and an offset of the first antenna port corresponding to the first control channel logic unit that detects the successful downlink control channel kind, and the first control And determining, by the at least one of the antenna port information and the offset information, the first control channel resource, where the first control channel resource is used for feedback and the detection
  • the ACK/NACK information of the corresponding downlink data channel of the successful downlink control channel is used for feedback and the detection.
  • an embodiment of the present invention provides a user equipment for determining a control channel resource
  • the user equipment includes: a detection module, configured to detect a downlink control channel that is sent by a base station to carry scheduling information of a downlink data channel, and the downlink control channel Formed by at least one control channel logic unit, and the at least one control channel logic unit is mapped to the at least one antenna port; the obtaining module is configured to acquire, according to the first control channel logic unit of the downlink control channel that the detection module detects successfully At least one of the antenna port information and the offset of the first antenna port, and the sequence number information of the first control channel logic unit; the first determining module, configured to acquire the antenna port information and the offset according to the acquiring module At least one of the shifts and the sequence number information, the first control channel resource is determined, and the first control channel resource is used to feed back ACK/NACK information for the downlink data channel corresponding to the successfully detected downlink control channel.
  • the method and user equipment of the embodiment of the present invention can dynamically according to at least one of antenna port information and offset of an antenna port corresponding to a control channel logic unit, and sequence number information of a control channel logic unit.
  • the control channel resources for feeding back ACK/NACK information are determined, and different control channel resources can be determined for different user equipments, thereby avoiding the problem of control channel resource conflicts between different user equipments.
  • FIG. 1 is a schematic diagram of PDCCH and PDSCH multiplexing according to an embodiment of the present invention.
  • 2 is a schematic diagram of a DMRS with a transmission rank of 2, in accordance with an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for determining a control channel resource according to an embodiment of the present invention.
  • 4 is a schematic flow chart of a method of determining control channel resources according to another embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a correspondence between a control channel logical unit and a physical resource block according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of transmitting ACK/NACK information according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a correspondence relationship between a control channel logical unit and a physical resource block according to another embodiment of the present invention.
  • FIG. 8 is a schematic block diagram of a user equipment that determines control channel resources according to an embodiment of the present invention.
  • FIG. 9 is a schematic block diagram of a user equipment that determines control channel resources according to another embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • the terminal device may also be referred to as a user equipment (User Equipment, referred to as "UE"), a mobile station (Mobile Station, referred to as "MS”), and a mobile terminal (Mobile Terminal).
  • the terminal device can communicate with one or more core networks via a Radio Access Network (RAN), for example, the terminal device can be a mobile phone (or "cellular" phone),
  • RAN Radio Access Network
  • the terminal device can be a mobile phone (or "cellular" phone),
  • a computer or the like having a mobile terminal for example, the terminal device may also be a portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile device that exchanges language and/or data with the wireless access network.
  • the base station may be a base station in GSM or CDMA (Base Transceiver)
  • BTS may also be a base station (NodeB, referred to as “NB”) in WCDMA, or an evolved Node B ("eNB or e-NodeB” in LTE).
  • NodeB referred to as "NB”
  • eNB or e-NodeB evolved Node B
  • LTE Long Term Evolution
  • 0 embodiment of invention is not limited to a base station and user equipment, but for ease of description, the following examples eNB and UE will be described with an example embodiment.
  • FIG. 1 shows a schematic diagram of PDCCH and PDSCH multiplexing according to an embodiment of the present invention. As shown
  • the PDCCH and PDSCH are time-division multiplexed in one subframe. Without loss of generality, here is a general cyclic prefix.
  • Each subframe (1 ms) includes two slots, and each slot includes 7 orthogonal frequency division multiplexing ("OFDM").
  • each OFDM symbol includes an NRBx12 resource element (Resource Element, referred to as "RE"), and the NRB is the number of resource blocks ("Bound Blocks" (RBs)) corresponding to the system bandwidth; wherein the PDCCH is in the first
  • PCFICH Physical Control Format Indicator Channel
  • the method further includes The uplink scheduling PDCCH, the Physical Hybrid ARQ Indicator Channel (PHICH) for the uplink HARQ transmission ACK/NACK information, and the PCFICH for indicating the number of OFDM symbols included in the PDCCH region .
  • PHICH Physical Hybrid ARQ Indicator Channel
  • PCFICH PCFICH for indicating the number of OFDM symbols included in the PDCCH region .
  • the PDCCH is used for downlink scheduling unless otherwise specified.
  • Each PDCCH is composed of 1/2/4/8 consecutive Control Channel Elements (CCEs), each CCE is composed of 36 REs, and CCEs constituting each PDCCH The number is determined by the size of the PDCCH and the channel information of the user equipment corresponding to the PDCCH.
  • the number of REs included in the PDCCH region is limited by the number of OFDM symbols used for the PDCCH, and if further considering that a part of REs in the PDCCH region requires PDCCH for PCFICH, PHICH, and uplink scheduling, the remaining number of REs will be limited.
  • the number of PDCCHs used for downlink scheduling that is, the number of downlink scheduling user equipments.
  • the PDCCH is enhanced, that is, a part of resources are allocated in the original PDSCH area to transmit the E-PDCCH.
  • the PDCCH, the E-PDCCH, and the PDSCH are time-division multiplexed in one sub- In the frame. Thereby, the capacity of the PDCCH can be increased, and the number of simultaneously scheduled user equipments can be increased.
  • FIG. 2 shows a schematic diagram of a DMRS with a transmission rank of 2, in accordance with an embodiment of the present invention.
  • the transmission rank of the scheduled user equipment is 1 or 2
  • 12 REs in a pair of resource blocks are used to transmit DMRS, where two DMRSs when the transmission rank is 2 are code division.
  • 24 REs in a pair of resource blocks are used to transmit DMRS, where multiple frequency divisions and code division multiplexing are used between multiple DMRSs.
  • the transmission mode 9 of the LTE Rel-10 communication system is a DMRS-based PDSCH transmission, that is, a DMRS is transmitted in a resource block scheduled by a user equipment, each DMRS defines one antenna port, and each layer of PDSCH data is mapped to a corresponding one.
  • the number of DMRSs of the antenna port is equal to the number of data block layers of the PDSCH or the transmission rank of the scheduled user equipment.
  • FIG. 3 shows a schematic flow diagram of a method 100 of determining control channel resources in accordance with an embodiment of the present invention.
  • the method 100 includes: S110, detecting, by the base station, a downlink control channel that carries scheduling information of a downlink data channel, where the downlink control channel is formed by at least one control channel logic unit, and the at least one control channel logic unit is mapped to at least one antenna port;
  • the user equipment may perform at least one of antenna port information and offset of the antenna port corresponding to the control channel logic unit by performing the method 100. And the sequence number information of the control channel logic unit, dynamically determining control channel resources for feeding back ACK/NACK information, and being able to determine different control channel resources for different user equipments, thereby being able to avoid between different user equipments The problem of control channel resource conflicts.
  • FIG. 4 shows a schematic flow chart of a method 200 of determining control channel resources in accordance with another embodiment of the present invention.
  • the user equipment detects a downlink control channel that is sent by the base station and carries scheduling information of a downlink data channel.
  • the downlink control channel may include an E-PDCCH
  • the downlink data channel may include a PDSCH.
  • the E-PDCCH carries scheduling information of a PDSCH, where the E-PDCCH is formed by at least one control channel logical unit, and the at least one control channel logical unit is mapped to a physical resource block in at least one antenna port.
  • At least one control channel logical unit corresponding to one user equipment is mapped to the same antenna port.
  • the antenna port is a DMRS antenna port.
  • the E-PDCCH and the PDSCH sent by the base station are E-PDCCH and PDSCH related to the scheduled at least one user equipment, and the at least one antenna port corresponds to at least one control channel logic unit, and the at least one control channel logic unit is formed.
  • the E-PDCCH since the E-PDCCH is transmitted in the PDSCH region, the E-PDCCH may also adopt a DMRS-based transmission manner similar to the PDSCH.
  • the HARQ technology adopted by the PDSCH cannot be adopted, so the transmission performance requirement of the E-PDCCH is higher than that of the PDSCH.
  • the resource required by the E-PDCCH needs to be variable. Therefore, adaptive modulation and/or coding can be performed for different channel conditions, such as signal to noise ratio, etc., to satisfy E. - PDCCH performance requirements.
  • the format of the E-PDCCH for different PDSCH transmission modes is also different, for example, the control channel data blocks are different, and therefore the resources of the E-PDCCH are also required to be variable.
  • the user equipment needs to perform blind detection on the E-PDCCH.
  • the number of control channel logical units constituting each E-PDCCH is related to the control channel format used by the scheduled user equipment and the conditions of the channel, and the Mn control channel logical units constituting each E-PDCCH are mapped to at least one antenna port.
  • the control channel logic unit herein is a virtual resource block or CCE.
  • the user equipment acquires at least one of antenna port information and an offset and sequence number information.
  • the user equipment acquires the sequence number information and/or the antenna port information according to a predefined or notified correspondence between the first control channel logic unit and the physical resource block.
  • the sequence number information is information related to the sequence number of the first control channel logical unit, and the first control channel logic unit forms an E-PDCCH that the user equipment detects successfully.
  • the sequence number information includes a sequence number of a first control channel logical unit in the first control channel logic unit. It should be understood that the serial number
  • the information may also include the sequence number of other control channel logic units in the first control channel logic unit, such as the sequence number of a certain control channel logic unit associated with the antenna port used by the control channel in the first control channel logic unit.
  • the sequence number may also be a sequence number of a virtual resource block or a physical resource block in which a certain control channel logic unit in the first control channel logic unit is located, for example, the sequence number information is the first control channel logic in the first control channel logic unit.
  • At least one control channel logical unit is included in one physical resource block or virtual resource block of the virtual resource block or physical resource in which the unit is located, for example, the number of control channel logical units included is 1, 2, 3 or 4.
  • the antenna port information is information related to the first antenna port where the physical resource block corresponding to the first control channel logical unit is located.
  • the first antenna port information of the physical resource block corresponding to the first control channel logic unit in the first control channel logic unit may also be the physical resource of the other control channel logic unit in the first control channel logic unit.
  • the antenna port information includes at least one of a sequence number of the first antenna port and an antenna port number of the at least one antenna port.
  • the antenna port information includes a sequence number of the first antenna port
  • the antenna port information may also include an antenna port number of the at least one antenna port
  • the antenna port information may further include a sequence number of the first antenna port and the at least one antenna The number of antenna ports on the port.
  • the offset may be dynamically configured by the upper layer or dynamically notified by the base station, and the offset may be set for the user equipment, that is, the offset of each user equipment is not completely the same, and the offset may also be for the
  • the offset of the user equipment in the cell is the same as that of the user equipment and the cell where the user is located, that is, the offset includes two parts.
  • the first part is The second part is set for the user equipment, and the second part is set for the cell to which the user equipment belongs.
  • the user equipment extracts the received data, that is, the data carried by the E-PDCCH, from the physical resource blocks 6 to 21 of the received DMRS antenna port 7, and the physical resource blocks 6 to 21 correspond to the E-PDCCH virtual resource.
  • the user equipment obtains an E-PDCCH corresponding to the user equipment by performing blind detection on the E-PDCCH in the virtual resource block.
  • the E-PDCCH of the user equipment 1 corresponds to the virtual resource blocks 8 to 15
  • the E-PDCCH of the user equipment 2 corresponds to the virtual resource blocks 4 to 5
  • the E-PDCCH of the user equipment 3 corresponds to the virtual resource blocks 0 to 3.
  • the E-PDCCH of the user equipment 4 corresponds to the virtual resource block 7.
  • the serial numbers " ⁇ of DMRS antenna ports 7 and 8 are 0 and 1, respectively.
  • the sequence number of the first virtual resource block of the user equipment 1 is "8, the sequence number of the first virtual resource block of the user equipment 2" is 4, and the first of the user equipment 3 is The serial number of the virtual resource block is "0, the serial number of the first virtual resource block of the user equipment 4" is 7, the number of the configured virtual resource blocks is 16, and the serial number of the first antenna port is "DMRS is 0, the first The number of the antenna port is 7 ⁇ is 1.
  • the sequence number of the physical resource block corresponding to the first virtual resource virtual resource block is 6, and the sequence number of the first virtual resource block may be 6.
  • the user equipment determines a first control channel resource for feeding back the ACK/NACK information.
  • the user equipment may determine the first control channel resource according to the obtained sequence number information and antenna port information.
  • the user equipment may determine the first control channel resource according to the obtained sequence number information and an offset.
  • the user equipment may be based on the obtained serial number information, and an antenna port. Information and offset, the first control channel resource is determined.
  • the user equipment may determine the first control channel resource according to the obtained sequence number information and antenna port information by using the following equation (1) or (2).
  • nACK!NACK nACKlNACK n VRB X ⁇ DMRS + n DMRS ( 1 )
  • nACKlNACK n DMRS X ⁇ VRB + n VRB ( 2 )
  • the corresponding relationship diagram shown in FIG. 5 is used as an example.
  • the sequence number of the first control channel resource determined by the user equipment 1 is ⁇ , which is determined by the user equipment 2.
  • the sequence number " ⁇ w ⁇ of the first control channel resource is 4, the sequence number of the first control channel resource determined by the user equipment 3 is / 0, and the sequence number of the first control channel resource determined by the user equipment 4 is " ⁇ 7". Therefore, the method of the embodiment of the present invention can dynamically determine the ACK/for feedback based on at least one of antenna port information and offset of the antenna port corresponding to the control channel logic unit and the sequence number information of the control channel logic unit.
  • the user equipment determines, according to at least one of the antenna port information and the offset, and the sequence number information, the first control channel resource used for feeding back the ACK/NACK information.
  • the offset may be semi-statically configured or dynamically notified by the upper layer, and the offset may be set for the user equipment, that is, the offset of each user equipment is not completely the same, and the offset may also be for the user equipment.
  • the offset of the user equipment in one cell is the same.
  • the sequence number of the first control channel resource may be determined by the following equation ( 3 ) or (4) including the offset.
  • nACKINACK ⁇ ACK/NACK + n VRB X ⁇ DMRS + n DMRS ( 3 )
  • nACKINACK ⁇ ACK/NACK + n DMRS X ⁇ VRB + n VRB ( 4 )
  • the number of CCEs in the PDCCH region is related to the number of symbols of OFDM for the PDCCH, it is possible to dynamically determine ⁇ according to the number of symbols of OFDM of the PDCCH in each subframe, where ⁇ / ⁇ ⁇ includes an offset of a resource for determining feedback ACK/NACK information for a PDCCH, and a number of CCEs in a PDCCH region. Since the number of symbols for OFDM for the PDCCH is indicated by the PCFICH, the user equipment can obtain the number of OFDM symbols of the PDCCH by detecting the PCFICH, and calculate the number of CCEs for the PDCCH, that is, determine the reserved for the corresponding PDCCH.
  • the number of resources used to feed back the ACK/NACK information whereby the offset N of the control channel resource used for feeding back the ACK/NACK information can be determined based on the sequence number of the next resource used for feeding back the ACK/NACK information.
  • ACK / NACK The number of resources used to feed back the ACK/NACK information, whereby the offset N of the control channel resource used for feeding back the ACK/NACK information can be determined based on the sequence number of the next resource used for feeding back the ACK/NACK information.
  • a resource is a spreading sequence in a resource block.
  • the user equipment modulates the spreading sequence by using ACK/NACK information, and then transmits it on one antenna, thereby implementing uplink ACK/NACK information, as shown in FIG. 6(A).
  • the method 200 for determining control channel resources when the ACK/NACK information is sent, the method 200 for determining control channel resources according to an embodiment of the present invention further includes:
  • the user equipment determines a second control channel resource used to feed back the ACK/NACK information.
  • the user equipment may be configured according to the first control signal in the acquired first control channel logic unit.
  • the second control channel resource is determined by at least one of a sequence number of the control channel logic unit immediately following the track logic unit and a sequence number of the second antenna port immediately following the first antenna port.
  • the user equipment may determine the second control according to at least one of antenna port information and offset of the first antenna port, and a sequence number of a control channel logic unit immediately after the first control channel logic unit. Channel resources.
  • the user equipment may also determine the second control channel resource according to at least one of sequence number information and offset of the first control channel logic unit and a sequence number of the second antenna port.
  • the user equipment may also be based on the sequence number of the control channel logical unit immediately following the first control channel logic unit and the sequence number of the second antenna port, or the control channel logical unit immediately following the first control channel logic unit The sequence number, the sequence number and the offset of the second antenna port, determine the second control channel resource.
  • the user equipment may be based on the sequence number of other control channel logic units immediately following the first control channel logic unit, and other antenna ports immediately following the first antenna port. At least one of the sequence numbers determines the second control channel resource for feeding back ACK/NACK information. Certainly, the user equipment may further determine the second control channel resource by referring to at least one of sequence number information of the first control channel logic unit, antenna port information of the first antenna port, and an offset.
  • the user equipment may determine, according to the sequence number of the second control channel logic unit immediately after the first control channel logic unit and the antenna port information of the first antenna port, to feed back the ACK/NACK information.
  • Second control channel resource For example, the sequence number of the second control channel resource can be determined by the following equation (5) or (6).
  • nACKINACK ⁇ ACK/NACK + ( n VRB + 1) X ⁇ OMRS + n DMRS ( 5 )
  • nACKINACK ⁇ ACK/NACK + n DMRS X ⁇ VRB + ( n VRB + 1) ( 6 )
  • the user equipment may also determine, according to the sequence number of the second antenna port immediately after the first antenna port, the number of the antenna port, and the sequence number information of the first control channel logic unit, for feedback.
  • nACKINACK ⁇ ACK/NACK + ( n DMRS + 1) X ⁇ VRB + n VRB ( 8 )
  • the two-antenna transmit diversity scheme SORTD can improve the uplink feedback.
  • ACK/NACK information For the user equipment to adopt SORTD, it is required to have a spreading sequence on each antenna, and the spreading sequences on the two antennas are different, and then use the same ACK/NACK signal to modulate the spreading sequence on different antennas, and The two antennas are respectively sent to implement uplink feedback ACK/NACK information, as shown in FIG. 6(B).
  • the specific process of the HARQ may be as follows: In the downlink scheduling, the user equipment needs to detect the E-PDCCH and the corresponding PDSCH. If the E-PDCCH is successfully detected, the user equipment demodulates the corresponding PDSCH according to the information in the E-PDCCH, and then the user equipment needs to demodulate the PDSCH demodulation result. If the PDSCH is correctly demodulated, the user equipment feeds back the ACK information to the eNB, indicating that the user equipment has correctly received the transmitted data, so that the eNB can perform the transmission of the new data block; otherwise, the user equipment feeds back the NACK information to the eNB, indicating that the data is not present.
  • the eNB For correct reception, the eNB needs to retransmit the data. If the E-PDCCH is not correctly detected, the user equipment considers that there is no PDSCH scheduled for itself, and thus does not perform any feedback on the uplink, that is, Discontinuous Transmission (referred to as "DTX").
  • DTX Discontinuous Transmission
  • control channel logic unit shown in FIG. 5 is cell-specific, that is, the base station allocates a control channel logical unit set to each cell, and is scheduled in the small area.
  • the E-PDCCH of each user equipment corresponds to at least one control channel logic unit in the set of control channel logical units. Therefore, the sequence number of the first control channel logical unit forming the E-PDCCH for which the detection of each user equipment is successful is different.
  • the embodiment of the present invention is only described by taking the case where the control channel logic unit is cell-specific, but the embodiment of the present invention is not limited thereto.
  • the control channel logic unit may also be user equipment specific, that is, the base station allocates a control channel logical unit set to each scheduled user equipment, and the E-PDCCH of each scheduled user equipment corresponds to a respective control channel logical unit set. At least one control channel logic unit. Therefore, the sequence numbers of the first control channel logical units of the E-PDCCH that form the successful detection of each user equipment may be the same or different, and the physical resource blocks of different user equipments may be overlapped or separated. As shown in Figure 7. For example, the physical resource block of the user equipment 1 partially overlaps with the physical resource block of the user equipment 2, but is completely separated from the physical resource block of the user equipment 3.
  • the user equipment may also be based on the obtained sequence information of the first control channel logical unit, the antenna port information of the first antenna port, the offset, and the like, and the offset at this time is specific to the user equipment, that is, The base station separately configures an offset for each user to determine first and/or second control channel resources for feeding back the ACK/NACK information, and the offset at this time can be notified by means of a high-level semi-static configuration. Further, on the basis of the user equipment-specific offset, there is another cell-specific offset of the user, and the offset includes two parts, and both parts can be configured through the upper semi-static configuration. The way to inform.
  • the method for determining the control channel resource can dynamically determine according to at least one of antenna port information and offset of the antenna port corresponding to the control channel logic unit, and the sequence number information of the control channel logic unit.
  • Control channel resources for feeding back ACK/NACK information, and different control channel resources can be determined for different user equipments, thereby avoiding the problem of control channel resource conflicts between different user equipments.
  • a method for determining control channel resources according to an embodiment of the present invention is described in detail above with reference to FIG. 3 to FIG. 7.
  • determining control channel resources according to an embodiment of the present invention will be described with reference to FIG. 8 to FIG. User equipment.
  • FIG. 8 shows a schematic block diagram of a user equipment 500 that determines control channel resources in accordance with an embodiment of the present invention. As shown in FIG. 8, the user equipment 500 includes:
  • the detecting module 510 is configured to detect, by the base station, a downlink control channel that carries scheduling information of a downlink data channel, where the downlink control channel is formed by at least one control channel logic unit, and the at least one control channel logic unit is mapped to the at least one antenna port;
  • the obtaining module 520 is configured to acquire at least one of antenna port information and an offset of the first antenna port corresponding to the first control channel logic unit of the downlink control channel that is detected by the detecting module 510, and the first The serial number information of the control channel logic unit;
  • the first determining module 530 is configured to determine, according to at least one of the antenna port information and the offset information acquired by the acquiring module 520, the first control channel resource, where the first control channel resource is used for feedback.
  • the user equipment for determining the control channel resource can dynamically determine according to at least one of antenna port information and offset of the antenna port corresponding to the control channel logic unit, and the sequence number information of the control channel logic unit. Control channel resources for feeding back ACK/NACK information, and different control channel resources can be determined for different user equipments, thereby avoiding the problem of control channel resource conflicts between different user equipments.
  • the serial number information is information related to the serial number of the first control channel logical unit.
  • the sequence number information of the first control channel logic unit includes a sequence number of the first control channel logic unit in the first control channel logic unit; it should be understood that the sequence number information may also include other controls in the first control channel logic unit.
  • the sequence number of the channel logical unit such as the sequence number of a certain control channel logical unit associated with the antenna port used by the control channel in the first control channel logic unit.
  • the sequence number may also be a sequence number of a virtual resource block or a physical resource block in which a certain control channel logic unit in the first control channel logic unit is located, for example, the sequence number information is the first in the first control channel logic unit.
  • the antenna port information of the first antenna port includes at least one of a sequence number of the first antenna port and an antenna port number of the at least one antenna port.
  • the detecting module 510 is specifically configured to detect the downlink control channel sent by the base station, where the at least one control channel logic unit is mapped to a physical resource block in the at least one antenna port, where the acquiring module 520 is specifically configured to be according to a predefined Or corresponding to the corresponding relationship between the first control channel logical unit and the physical resource block, obtaining the serial number information and/or the antenna port information.
  • the obtaining module 520 is specifically configured to obtain at least one of the antenna port information and the offset, where the offset is dynamically notified by the base station or semi-statically configured by a high layer.
  • the acquiring module 520 is specifically configured to acquire at least one of the antenna port information and the offset, where the offset is configured for at least one of the user equipment and a cell to which the user equipment belongs. .
  • the antenna port may be a demodulation reference signal DMRS antenna port.
  • the user equipment 500 may further include:
  • a second determining module 540 configured to: according to the SORTD, send the ACK/NACK information, according to a sequence number of a control channel logical unit immediately after the first control channel logic unit in the first control channel logic unit, and the first At least one of the sequence numbers of the second antenna ports immediately after an antenna port determines a second control channel resource for feeding back the ACK/NACK information.
  • the second determining module 540 may determine, according to at least one of antenna port information and an offset of the first antenna port, and a sequence number of a control channel logical unit immediately after the first control channel logic unit.
  • the second control channel resource may also determine the second control channel resource according to at least one of sequence number information and an offset of the first control channel logic unit and a sequence number of the second antenna port.
  • the second determining module 540 can also be based on the first control a sequence number of the control channel logic unit immediately after the channel logic unit and a sequence number of the second antenna port, or a sequence number of the control channel logic unit immediately following the first control channel logic unit, and a sequence number of the second antenna port And an offset, the second control channel resource is determined.
  • the second determining module 540 may be based on the sequence numbers of the other control channel logical units immediately following the first control channel logic unit, and the first antenna. At least one of the sequence numbers of other antenna ports immediately following the port determines the second control channel resource for feeding back ACK/NACK information.
  • the second determining module 540 may further determine the second control channel resource by referring to at least one of sequence number information of the first control channel logic unit, antenna port information of the first antenna port, and an offset.
  • the user equipment 500 for determining the control channel resource may correspond to the user equipment in the embodiment of the present invention, and the detecting module 510, the obtaining module 520, and the first determining module 530 in the user equipment 500 may be respectively used to perform S110, S120, S130 and S210, S220, S230 in FIG. 3 and FIG. 4, the second determining module 540 in the user equipment 500 can be used to execute S240 in FIG. 4, and details are not described herein for brevity.
  • the user equipment for determining the control channel resource can dynamically determine according to at least one of antenna port information and offset of the antenna port corresponding to the control channel logic unit, and the sequence number information of the control channel logic unit. Control channel resources for feeding back ACK/NACK information, and different control channel resources can be determined for different user equipments, thereby avoiding the problem of control channel resource conflicts between different user equipments.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separate, and the components displayed as the units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or a combination of software functional units and hardware.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like.

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Abstract

本发明公开了一种确定控制信道资源的方法和用户设备。该方法包括：检测基站发送的承载下行数据信道的调度信息的下行控制信道，该下行控制信道由至少一个控制信道逻辑单元形成，且该至少一个控制信道逻辑单元映射到至少一个天线端口；获取与检测成功的下行控制信道的第一控制信道逻辑单元相对应的第一天线端口的天线端口信息和偏移量中的至少一种以及第一控制信道逻辑单元的序号信息；根据该天线端口信息和该偏移量中的至少一种以及该序号信息，确定用于反馈针对与检测成功的下行控制信道相应的下行数据信道的ACK/NACK信息的第一控制信道资源。本发明实施例的方法和用户设备能够动态地确定用于反馈ACK/NACK信息的资源。

Description

确定控制信道资源的方法和用户设备
本申请要求于 2011 年 06 月 27 日提交中国专利局、 申请号为 201110175253.9、 发明名称为"确定控制信道资源的方法和用户设备"的中国专 利申请的优先权， 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信领域 ,特别涉及通信领域中确定控制信道资源的方法和用 户设备。
背景技术
长期演进（Long Term Evolution, 简称为 "LTE" )第 8/9/ 10版本（ Release 8/9/10, 简称为 "Rel-8/9/10" )通信系统采用了动态调度的技术， 以提高通信 系统的性能， 即基站（Evolved NodeB, 简称为 "eNB" )根据每个用户设备 ( User Equipment, 简称为 "UE" )的信道状况来进行调度和分配资源， 使得 每个被调度的用户设备都在其最优的信道上进行传输。 在下行传输中， eNB根 据动态调度的结果为每个被调度的用户设备发送物理下行共享信道（ Physical Downlink Shared Channel, 简称为 "PDSCH" )以及对应的物理下行控制信道 ( Physical Downlink Control Channel, 简称为 "PDCCH" ) , 其中 PDSCH承载 着 eNB发送给被调度的用户设备的数据， PDCCH主要用来指示对应的 PDSCH 的传输格式， 即调度信息， 包括资源的分配、 传输块的大小、 调制编码方式、 传输秩以及预编码矩阵信息等。
PDCCH和 PDSCH时分复用在一个子帧中， 因此一个子帧所能支持的 PDCCH个数是受限的， 即基站调度用户设备的个数是受限的。 PDCCH的容量 受限问题在 LTE Rel-10通信系统的进一步演进中更加突出。 特别地， 演进系统 通常应用多输入多输出 （ Multiple Input Multiple Output, 简称为 "MIMO" ) 技术， 以提高通信系统的谱效率， 这就意味着基站同时调度的用户设备的数量 增加了， 因此需要更多的 PDCCH。 另外， 演进系统中考虑的一个很重要的场 景就是异构网，该场景的一个具体实现方式是在一个宏小区的覆盖范围内除了 设置宏基站之外， 还设置了多个远端射频单元（ Remote Radio Unit, 简称为 "RRU" ) , 这些 RRU与其所在的宏小区具有相同的小区标识， 并且 PDCCH 采用基于解调参考信号 （Demodulation Reference Signal, 简称为 "DMRS" ) 的传输方式， 因此每个 RRU都可以单独服务一些用户设备。但是每个 RRU对于 用户设备而言是透明的，因而在该场景中极大地增加了基站调度的用户设备的 数量， 由此也增加了所需要的 PDCCH的容量。
为此， 通信系统对现有的 PDCCH进行了增强， 即在原有的 PDSCH区域划 分出一部分资源， 用于传输增强的 PDCCH, 即增强物理下行控制信道
( Enhanced Physical Downlink Control Channel, 简称为 "E-PDCCH" )。 这样 分配给控制信道的资源就有很大的灵活度， PDCCH的容量得到了增加， 同时 E-PDCCH也可以采用基于 DMRS的传输方式，可以实现空间上的重用以提高控 制信道的传输效率。例如，服务于不同的 RRU下的用户设备的控制信道完全可 以占用同样的时频资源， 只要在空间上进行隔离即可。
在 LTE Rel-8/9/lO通信系统中， 通常采用混合自动重传请求（Hybrid Automatic Repeat Request, 简称为 "HARQ" )技术来提高通信系统的性能， 并且该 HARQ技术也会继续应用在演进的通信系统中， 例如应用于 LTE Rel-11。 由于动态被调度的用户设备需要给 eNB上行反馈确认
( Acknowledgement, 简称为 "ACK" ) /否认 ( Non- Acknowledgement, 简称 为 "NACK" M言息，因此动态被调度的用户设备需要确定上行反馈 ACK/NACK 信息的资源。 考虑到动态调度的随机性以及资源的利用效率， 上行反馈 ACK/NACK信息的资源需要采用动态预留的方法， 即当 PDSCH被调度时， 才 会预留资源， 而不适于采用半静态预留的方法。 因此， 对于采用 HARQ技术的 通信系统而言， 需要解决的技术问题就是当用户设备检测到 E-PDCCH和 PDSCH后， 如何动态地确定用于上行反馈 ACK/NACK信息的资源。 在相关技术中， 对于 PDCCH和 PDSCH复用在一起的情况， 即在没有对 PDCCH进行增强的情况下， ACK/NACK信息的反馈是在物理上行控制信道 ( Physical Uplink Control Channel, 简称为 "PUCCH" )上以码分复用的方式 进行的， 即每个用户设备通过一个时频二维扩频的序列对 ACK/NACK信息进 行调制后发送， 其中对于每个动态被调度的用户设备而言， 用于上行反馈 ACK/NACK信息的资源是由 PDCCH的控制信道单元（ Control Channel
Element, 简称为 "CCE" ) 的序号隐性地确定。
然而， 对于 PDCCH、 E-PDCCH和 PDSCH复用在一起的情况， 如果仍采用
法， 那么由于不同的 RRU下基于 DMRS传输的 E-PDCCH可以占用相同的时频 资源和不同的 DMRS端口，不同的 E-PDCCH有可能具有相同的控制信道逻辑标 号或序号， 因而可能导致不同用户设备之间反馈 ACK/NACK信息的资源出现 冲突的问题， 即两个或者两个以上的用户设备占用同样的资源，从而对不同用 户设备之间的 ACK/NACK信息造成干扰。
发明内容
为此， 本发明实施例提供了一种确定控制信道资源的方法和用户设备， 能 够动态地确定用于上行反馈 ACK/NACK信息的资源， 并且能够避免不同用户 设备之间的资源冲突问题。
一方面，本发明实施例提供了一种确定控制信道资源的方法，该方法包括： 检测基站发送的承载下行数据信道的调度信息的下行控制信道，该下行控制信 道由至少一个控制信道逻辑单元形成，且该至少一个控制信道逻辑单元映射到 至少一个天线端口；获取与检测成功的下行控制信道的第一控制信道逻辑单元 相对应的第一天线端口的天线端口信息和偏移量中的至少一种，以及该第一控 制信道逻辑单元的序号信息；才艮据该天线端口信息和该偏移量中的至少一种以 及该序号信息，确定第一控制信道资源， 该第一控制信道资源用于反馈针对与 该检测成功的下行控制信道相应的下行数据信道的 ACK/NACK信息。
另一方面， 本发明实施例提供了一种确定控制信道资源的用户设备， 该用 户设备包括： 检测模块， 用于检测基站发送的承载下行数据信道的调度信息的 下行控制信道， 该下行控制信道由至少一个控制信道逻辑单元形成，且该至少 一个控制信道逻辑单元映射到至少一个天线端口； 获取模块， 用于获取与该检 测模块检测成功的下行控制信道的第一控制信道逻辑单元相对应的第一天线 端口的天线端口信息和偏移量中的至少一种，以及该第一控制信道逻辑单元的 序号信息； 第一确定模块， 用于根据该获取模块获取的该天线端口信息和该偏 移量中的至少一种以及该序号信息，确定第一控制信道资源， 该第一控制信道 资源用于反馈针对与该检测成功的下行控制信道相应的下行数据信道的 ACK/ NACK信息。
基于上述技术方案， 本发明实施例的方法和用户设备，根据与控制信道逻 辑单元相应的天线端口的天线端口信息和偏移量中的至少一种，以及控制信道 逻辑单元的序号信息， 能够动态地确定用于反馈 ACK/NACK信息的控制信道 资源， 并且对于不同的用户设备而言能够确定不同的控制信道资源， 由此能够 避免不同用户设备之间的控制信道资源冲突的问题。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例中所 需要使用的附图作简单地介绍，显而易见地， 下面所描述的附图仅仅是本发明 的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1是根据本发明实施例的 PDCCH和 PDSCH复用的示意图。 图 2是根据本发明实施例的传输秩为 2时 DMRS的示意图。
图 3是根据本发明实施例的确定控制信道资源的方法的示意性流程图。 图 4是根据本发明另一实施例的确定控制信道资源的方法的示意性流程 图。
图 5 是根据本发明实施例的控制信道逻辑单元与物理资源块的对应关系 的示意图。
图 6是根据本发明实施例的发送 ACK/NACK信息的示意图。
图 7是根据本发明另一实施例的控制信道逻辑单元与物理资源块的对应 关系的示意图。
图 8是根据本发明实施例的确定控制信道资源的用户设备的示意性框图。 图 9是根据本发明另一实施例的确定控制信道资源的用户设备的示意性 框图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清 楚、 完整地描述， 显然， 所描述的实施例是本发明的一部分实施例， 而不是全 部实施例。基于本发明中的实施例， 本领域普通技术人员在没有做出创造性劳 动的前提下所获得的所有其他实施例， 都应属于本发明保护的范围。
应理解， 本发明的技术方案可以应用于各种通信系统， 例如： 全球移动通 讯（Global System of Mobile communication, 简称为 "GSM" ) 系统、 码分多 址（ Code Division Multiple Access, 简称为 "CDMA" ) 系统、 宽带码分多址 ( Wideband Code Division Multiple Access, 简称为 "WCDMA" ) 系统、 通用 分组无线业务（ General Packet Radio Service,简称为 "GPRS" )、长期演进（ Long Term Evolution,简称为 "LTE" )系统、 LTE频分双工( Frequency Division Duplex , 简称为 "FDD" )系统、 LTE时分双工（ Time Division Duplex, 简称为 "TDD" )、 通用移动通信系统 ( Universal Mobile Telecommunication System , 简称为 "UMTS" )等。
还应理解， 在本发明实施例中， 终端设备也可称之为用户设备（User Equipment, 简称为 "UE" )、 移动台 （Mobile Station, 简称为 "MS" )、 移动 终端 （Mobile Terminal ) 等， 该终端设备可以经无线接入网 （Radio Access Network, 简称为 "RAN" )与一个或多个核心网进行通信， 例如， 终端设备可 以是移动电话（或称为 "蜂窝" 电话）、 具有移动终端的计算机等， 例如， 终 端设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置， 它们与无线接入网交换语言和 /或数据。
在本发明实施例中，基站可以是 GSM或 CDMA中的基站（ Base Transceiver
Station,简称为 "BTS" ),也可以是 WCDMA中的基站（NodeB,简称为 "NB" ), 还可以是 LTE 中的演进型基站 （Evolutional Node B , 简称为 "eNB 或 e-NodeB" )0 本发明实施例对基站和用户设备并不限定， 但为描述方便， 下述 实施例将以 eNB和 UE为例进行说明。
图 1示出了根据本发明实施例的 PDCCH和 PDSCH复用的示意图。 如图
1 ( A )所示， PDCCH和 PDSCH时分复用在一个子帧中。 不失一般性， 这里 以通用循环前缀为例， 每个子帧 （1ms ) 包括两个时隙， 每个时隙包括 7个正 交频分复用 （ Orthogonal Frequency Division Multiplexing, 简称为" OFDM" )符 号， 每个 OFDM符号包括 NRBxl2个资源单元（Resource Element, 简称为 "RE" ) , NRB是系统带宽所对应的资源块（ Resource Block, 简称为 "RB" ) 的 数量； 其中 PDCCH在第一个时隙的前 n ( n=l, 2,3 )个 OFDM符号中传输， n 是动态可变的， 可以由物理控制格式指示信道 ( Physical Control Format Indicator Channel, 简称为 "PCFICH" )指示， 剩余的 OFDM符号用于传输 PDSCH。
在 PDCCH区域中， 除了上述的用于下行调度的 PDCCH外， 还包括用于 上行调度的 PDCCH、 用于上行 HARQ传输 ACK/NACK信息的物理混合自动 重传请求指示信道 ( Physical Hybrid ARQ Indicator Channel, 简称为 "PHICH" ) 以及用于指示 PDCCH区域包括的 OFDM符号个数的 PCFICH。应理解，在下 文的描述中， 如果没有特别说明， PDCCH都指用于下行调度。 其中， 每个 PDCCH是由 1/2/4/8个连续的控制信道单元（Control Channel Element, 简称 为 "CCE" )组成， 每个 CCE是由 36个 RE组成， 并且组成每个 PDCCH的 CCE个数由 PDCCH的大小以及 PDCCH所对应用户设备的信道信息确定。
由于 PDCCH区域包括的 RE个数受限于用于 PDCCH的 OFDM符号个数， 并且如果进一步考虑 PDCCH区域中的一部分 RE需要用于 PCFICH、 PHICH 和上行调度的 PDCCH, 剩余的 RE个数将会限制用于下行调度的 PDCCH的 个数， 即限制下行调度用户设备的数量。 为此， 通过对 PDCCH进行增强， 即 在原有的 PDSCH区域划分出一部分资源来传输 E-PDCCH,如图 1 ( B )所示， 示出了 PDCCH、 E-PDCCH和 PDSCH时分复用在一个子帧中。 由此能够提高 PDCCH的容量， 增加同时调度用户设备的数量。
图 2示出了根据本发明实施例的传输秩为 2时 DMRS的示意图。 如图 2 所示， 当被调度的用户设备的传输秩为 1或 2时， 一对资源块中的 12个 RE 用来传输 DMRS， 其中当传输秩为 2时的两个 DMRS是码分复用的； 当被调 度的用户设备的传输秩大于 2时，一对资源块中的 24个 RE用来传输 DMRS, 其中多个 DMRS之间采用时频分和码分复用。 应理解， LTE Rel- 10通信系统 的传输模式 9是基于 DMRS的 PDSCH传输，即在用户设备调度的资源块中传 输 DMRS, 每个 DMRS定义一个天线端口， PDSCH的每层数据映射到一个对 应的天线端口， DMRS的个数等于 PDSCH的数据块层数或者被调度用户设备 的传输秩。
图 3示出了根据本发明实施例的确定控制信道资源的方法 100的示意性流 程图。 如图 3所示， 该方法 100包括： S110,检测基站发送的承载下行数据信道的调度信息的下行控制信道，该 下行控制信道由至少一个控制信道逻辑单元形成，且该至少一个控制信道逻辑 单元映射到至少一个天线端口；
S120,获取与检测成功的下行控制信道的第一控制信道逻辑单元相对应的 第一天线端口的天线端口信息和偏移量中的至少一种，以及该第一控制信道逻 辑单元的序号信息；
S130,根据该天线端口信息和该偏移量中的至少一种以及该序号信息，确 定第一控制信道资源 ,该第一控制信道资源用于反馈针对与该检测成功的下行 控制信道相应的下行数据信道的 ACK/NACK信息。
为了动态地确定用户设备用于反馈 ACK/NACK信息的控制信道资源， 用 户设备通过执行该方法 100, 可以根据与控制信道逻辑单元相应的天线端口的 天线端口信息和偏移量中的至少一种， 以及控制信道逻辑单元的序号信息， 动 态地确定用于反馈 ACK/NACK信息的控制信道资源， 并且对于不同的用户设 备而言能够确定不同的控制信道资源，由此能够避免不同用户设备之间的控制 信道资源冲突的问题。
图 4示出了根据本发明另一实施例的确定控制信道资源的方法 200的示意 性流程图。 如图 4所示， 在 S210中， 用户设备检测基站发送的承载下行数据 信道的调度信息的下行控制信道。在本发明实施例中， 该下行控制信道可以包 括 E-PDCCH, 该下行数据信道可以包括 PDSCH。 E-PDCCH承载 PDSCH的 调度信息， 该 E-PDCCH由至少一个控制信道逻辑单元形成， 该至少一个控制 信道逻辑单元映射到至少一个天线端口中的物理资源块。可选地， 与一个用户 设备相应的至少一个控制信道逻辑单元映射到同一个天线端口。可选地， 该天 线端口为 DMRS天线端口。 应理解， 基站发送的 E-PDCCH和 PDSCH是与被 调度的至少一个用户设备相关的 E-PDCCH和 PDSCH, 该至少一个天线端口 与至少一个控制信道逻辑单元相应，该至少一个控制信道逻辑单元形成基站调 度的至少一个用户设备的 E-PDCCH。
在本发明实施例中， 由于 E-PDCCH在 PDSCH区域发送， 因此 E-PDCCH 也可以采用类似于 PDSCH的基于 DMRS的传输方式。 对于 E-PDCCH而言， 不能采用 PDSCH所采用的 HARQ技术， 因此 E-PDCCH的传输性能要求要高 于 PDSCH。 为了保证 E-PDCCH的传输性能和效率， E-PDCCH所占用的资源 需要是可变的， 因此， 可以针对不同的信道情况， 例如信噪比等， 进行自适应 调制和 /或编码来满足 E-PDCCH的性能要求。 另外， 针对不同 PDSCH传输模 式的 E-PDCCH 的格式也不同， 例如控制信道数据块不同， 因此也需要 E-PDCCH的资源是可变的。
由于动态调度的随机性， 用户设备需要对 E-PDCCH 进行盲检测， 若
E-PDCCH的资源可变的灵活性太大， 就会增加用户盲检测复杂度。 为了在盲 检测复杂度和 E-PDCCH传输效率之间折衷，可以定义 E-PDCCH的资源粒度， 这里的资源粒度可以定义为控制信道逻辑单元。根据 E-PDCCH的控制信道格 式以及信道的情况，可以确定一个 E-PDCCH由 Mn个控制信道逻辑单元组成， 即 Mn个控制信道逻辑单元承载着 E-PDCCH的数据， 其中 n=0、 1、 ...N-1 , N是控制信道逻辑单元聚合级别数。 组成每个 E-PDCCH的控制信道逻辑单元 的个数与被调度用户设备所用的控制信道格式以及信道的条件有关，并且组成 每个 E-PDCCH的 Mn个控制信道逻辑单元映射到至少一个天线端口中的一组 物理资源块中。 应理解， 本文中的控制信道逻辑单元是虚拟资源块或 CCE。
在 S220中， 用户设备获取天线端口信息和偏移量中的至少一种以及序号 信息。可选地， 用户设备根据预定义的或被通知的该第一控制信道逻辑单元与 该物理资源块的对应关系， 获取该序号信息和 /或该天线端口信息。
该序号信息是与第一控制信道逻辑单元的序号相关的信息，该第一控制信 道逻辑单元形成用户设备检测成功的 E-PDCCH。 可选地， 该序号信息包括该 第一控制信道逻辑单元中的第一个控制信道逻辑单元的序号。应理解， 该序号 信息也可以包括该第一控制信道逻辑单元中的其它控制信道逻辑单元的序号 , 例如第一控制信道逻辑单元中与所述控制信道所用的天线端口关联的某个控 制信道逻辑单元的序号。该序号还可以是第一控制信道逻辑单元中的某个控制 信道逻辑单元所在的虚拟资源块或物理资源块的序号，例如该序号信息是第一 控制信道逻辑单元中的第一个控制信道逻辑单元所在的虚拟资源块或物理资 的一个物理资源块或者虚拟资源块中包括至少一个控制信道逻辑单元， 例如， 包含的控制信道逻辑单元的个数是 1 , 2, 3或 4。
该天线端口信息是与该第一控制信道逻辑单元相对应的物理资源块所在 的第一天线端口的相关信息。优选地， 第一控制信道逻辑单元中第一个控制信 道逻辑单元所对应的物理资源块所在的第一天线端口信息，也可以是第一控制 信道逻辑单元中其它控制信道逻辑单元所在的物理资源块所在的第一天线端 口信息。可选地， 该天线端口信息至少包括该第一天线端口的序号和该至少一 个天线端口的天线端口数量中的一种。即该天线端口信息包括该第一天线端口 的序号， 该天线端口信息也可以包括该至少一个天线端口的天线端口数量， 该 天线端口信息还可以包括该第一天线端口的序号和该至少一个天线端口的天 线端口数量。
该偏移量可以由高层半静态配置或由基站动态通知，该偏移量可以是针对 用户设备设置的， 即每个用户设备的偏移量不完全相同， 该偏移量也可以是针 对该用户设备所属的小区设置的， 即一个小区内的用户设备的偏移量相同， 该 偏移量也可以针对用户设备和该用户所在的小区设置的， 即偏移量包括两部 分， 第一部分是针对用户设备设置的， 第二部分是针对该用户设备所属的小区 设置的。
下面将结合图 5 所示的根据本发明实施例的控制信道逻辑单元与物理资 源块的对应关系示意图， 对本发明实施例进行进一步说明。 如图 5所示， 用户设备从接收的 DMRS天线端口 7的物理资源块 6 ~ 21 中取出接收的数据， 即 E-PDCCH承载的数据， 该物理资源块 6 ~ 21 对应于 E-PDCCH虚拟资源块 0 ~ 15。用户设备通过在虚拟资源块中对 E-PDCCH进行 盲检测， 得到与该用户设备对应的 E-PDCCH。 例如， 用户设备 1的 E-PDCCH 对应于虚拟资源块 8 ~ 15 , 用户设备 2的 E-PDCCH对应于虚拟资源块 4 ~ 5 , 用户设备 3的 E-PDCCH对应于虚拟资源块 0 ~ 3 , 用户设备 4的 E-PDCCH对 应于虚拟资源块 7。
用户设备根据检测成功的 E-PDCCH, 可以确定组成该 E-PDCCH的第一 个虚拟资源块的序号 " ， 即第一个控制信道逻辑单元所在的虚拟资源块， 其 中"層：0，1，…，^^ - ^ 是配置的虚拟资源块的个数， 以及与该第一个虚拟 资源块所映射的物理资源相应的第一天线端口的序号 "DMRS , 其中 n S = U s - l , 是第一天线端口的个数， 例如 DMRS 天线端口 7 和 8的序号"^ ^分别为 0和 1。 例如， 在图 5所示的实施例中， 用户设备 1的 第一个虚拟资源块的序号" 为 8 ,用户设备 2的第一个虚拟资源块的序号 " 为 4,用户设备 3的第一个虚拟资源块的序号 " 为 0,用户设备 4的第一个虚 拟资源块的序号" 为 7 , 配置的虚拟资源块的个数 为 16, 第一天线端口 的序号 "DMRS为 0, 第一天线端口的个数7^ ^^为 1。 可选地， 第一个虚拟资源 个虚拟资源块对应的物理资源块的序号为 6, 那么该第一个虚拟资源块的序号 可以是 6。
在 S230中， 用户设备确定用于反馈该 ACK/NACK信息的第一控制信道 资源。 可选地， 用户设备可以才艮据获取的序号信息和天线端口信息， 确定该第 一控制信道资源。 可选地， 用户设备可以根据获取的序号信息和偏移量， 确定 该第一控制信道资源。 可选地， 用户设备可以根据获取的序号信息、 天线端口 信息和偏移量， 确定该第一控制信道资源。 例如， 用户设备可以根据获取的序 号信息和天线端口信息， 通过下面的等式（ 1 )或（2 )确定该第一控制信道资
, 1
源的序号 nACK!NACK nACKlNACK = nVRB X ^DMRS + nDMRS ( 1 ) nACKlNACK = nDMRS X ^VRB + nVRB ( 2 )
仍以图 5所示的对应关系示意图为例进行说明，例如根据等式（ 1 )或（2 ), 用户设备 1确定的第一控制信道资源的序号 " ^^ 为 8 , 用户设备 2确定的 第一控制信道资源的序号 "^w^为 4, 用户设备 3确定的第一控制信道资源 的序号 ^/A¾cx为 0,用户设备 4确定的第一控制信道资源的序号"^ ^^为 7 因此，本发明实施例的方法根据与控制信道逻辑单元相应的天线端口的天 线端口信息和偏移量中的至少一种， 以及控制信道逻辑单元的序号信息， 能够 动态地确定用于反馈 ACK/NACK信息的控制信道资源， 并且对于不同的用户 设备而言能够确定不同的控制信道资源 由此能够避免不同用户设备之间的控 制信道资源冲突的问题。
在本发明实施例中， 可选地， 用户设备根据该天线端口信息和偏移量中的 至少一种以及该序号信息， 确定用于反馈该 ACK/NACK信息的该第一控制信 道资源。该偏移量可以由高层半静态配置或动态通知， 该偏移量可以是针对用 户设备设置的， 即每个用户设备的偏移量不完全相同， 该偏移量也可以是针对 该用户设备所属的小区设置的，即一个小区内的用户设备的偏移量相同。例如， 可以通过下面的包括偏移量 的等式（3 )或（4 )确定该第一控制信道 资源的序号
nACKINACK = ^ ACK/NACK + nVRB X ^DMRS + nDMRS ( 3 ) nACKINACK = ^ ACK/NACK + nDMRS X ^VRB + nVRB ( 4 ) 应理解， 对于在 PDCCH 区域发送的控制信道， 其对应的用于上行反馈 ACK/NACK信息的资源由 PDCCH的第一个 CCE的序号和一个偏移量^^«/ 确定。 若针对 PDCCH和 E-PDCCH的用于上行反馈 ACK/NACK信息的资源 是连续分配的， 那么就需要确定这两类用于反馈 ACK/NACK信息的资源的分 界线， 即需要确定偏移量^^ 。 由于 PDCCH 区域中的 CCE个数与用于 PDCCH 的 OFDM 的符号个数有关， 因此， 在每个子帧中可以动态地根据 PDCCH的 OFDM的符号个数来确定^^ ^ , 其中 Λ^Χ/^Ω包括用于确定针 对 PDCCH的反馈 ACK/NACK信息的资源的偏移量 ,以及 PDCCH区域 中的 CCE的数量。因为用于 PDCCH的 OFDM的符号个数由 PCFICH来指示， 因此用户设备可以通过检测 PCFICH来获取 PDCCH 的 OFDM的符号个数 , 并计算出用于 PDCCH的 CCE个数， 即确定预留给对应 PDCCH的用于反馈 ACK/NACK信息的资源数， 由此根据紧接着的下一个用于反馈 ACK/NACK 信息的资源的序号， 可以确定用于反馈 ACK/NACK信息的控制信道资源的偏 移量 N ACK / NACK 。
应理解， 在用户设备确定用于反馈 ACK/NACK信息的第一控制信道资源 之后， 由于上行反馈 ACK/NACK信息是基于码分复用的， 因此实际上每个用 户设备确定的第一控制信道资源是一个资源块中的扩频序列。用户设备通过用 ACK/NACK信息对该扩频序列进行调制后， 在一个天线上发送， 从而实现上 行反馈 ACK/NACK信息， 如图 6 ( A )所示。
当用户设备采用空间正交资源发送分集方案 （ Spatial Orthogonal Resource
Transmit Diversity, 简称为 "SORTD" )发送该 ACK/NACK信息时， 根据本发 明实施例的确定控制信道资源的方法 200还包括：
S240 , 用户设备确定用于反馈该 ACK/NACK信息的第二控制信道资源。 可选地，用户设备可以根据获取的该第一控制信道逻辑单元中的第一个控制信 道逻辑单元之后紧接的控制信道逻辑单元的序号，以及该第一天线端口之后紧 接的第二天线端口的序号中的至少一种， 确定该第二控制信道资源。
例如，用户设备可以根据该第一天线端口的天线端口信息和偏移量中的至 少一种， 以及该第一个控制信道逻辑单元之后紧接的控制信道逻辑单元的序 号，确定该第二控制信道资源。用户设备也可以根据该第一控制信道逻辑单元 的序号信息和偏移量中的至少一种， 以及该第二天线端口的序号，确定该第二 控制信道资源。用户设备还可以根据该第一个控制信道逻辑单元之后紧接的控 制信道逻辑单元的序号以及该第二天线端口的序号，或根据该第一个控制信道 逻辑单元之后紧接的控制信道逻辑单元的序号、该第二天线端口的序号和偏移 量， 确定该第二控制信道资源。
应理解， 与确定第一控制信道资源相类似， 用户设备可以根据该第一个控 制信道逻辑单元之后紧接的其它控制信道逻辑单元的序号，以及该第一天线端 口之后紧接的其它天线端口的序号中的至少一种， 确定用于反馈 ACK/NACK 信息的该第二控制信道资源。 当然， 用户设备还可以参考第一控制信道逻辑单 元的序号信息、第一天线端口的天线端口信息和偏移量中的至少一种，确定该 第二控制信道资源。
具体地， 例如， 用户设备可以根据该第一个控制信道逻辑单元之后紧接的 第二控制信道逻辑单元的序号以及该第一天线端口的天线端口信息，确定用于 反馈该 ACK/NACK信息的第二控制信道资源。例如，可以通过下面的等式（ 5 ) 或 （6 )确定该第二控制信道资源的序号 。 nACKINACK = ^ ACK/NACK + (nVRB + 1) X ^ OMRS + nDMRS ( 5 ) nACKINACK = ^ ACK/NACK + nDMRS X ^VRB + (nVRB + 1) ( 6 )
例如，用户设备也可以根据该第一天线端口之后紧接的第二天线端口的序 号以及该天线端口数量和该第一控制信道逻辑单元的序号信息，确定用于反馈 该 ACK/NACK信息的第二控制信道资源。 例如， 可以通过下面的等式（7 ) 或 （8 )确定该第二控制信道资源的序号 nACKINACK = ^ ACK/NACK + nVRB X ^ OMRS + (nDMRS + 1) { l )
nACKINACK = ^ ACK/NACK + (nDMRS + 1) X ^VRB + nVRB ( 8 )
应理解， 采用两天线的发送分集方案 SORTD 能够提高上行反馈
ACK/NACK信息的性能。 对于用户设备采用 SORTD而言， 需要每个天线上 有一个扩频序列，且这两个天线上的扩频序列不同，然后用同样的 ACK/NACK 信号来调制不同天线上的扩频序列， 并且分别在这两个天线上发送，从而实现 上行反馈 ACK/NACK信息， 如图 6 ( B )所示。
还应理解， HARQ的具体过程可以如下： 在下行调度中， 用户设备需要检 测 E-PDCCH以及对应的 PDSCH。如果 E-PDCCH检测成功 ,那么用户设备就 根据 E-PDCCH中的信息去解调对应的 PDSCH, 然后， 用户设备需要上行反 馈 PDSCH的解调结果。如果 PDSCH解调正确，那么用户设备反馈 ACK信息 给 eNB, 表示用户设备已经正确接收到发送的数据， 从而 eNB可以进行新的 数据块的传输； 反之， 用户设备反馈 NACK信息给 eNB, 表示数据没有正确 接收， 需要 eNB重传该数据。 如果 E-PDCCH没有被正确检测， 那么用户设备 就认为没有调度给自己的 PDSCH, 从而在上行也不进行任何反馈， 即非连续 传输 ( Discontinuous Transmission, 简称为 "DTX" )„
应理解， 上述各过程的序号的大小并不意味着执行顺序的先后，各过程的 执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成 任何限定。
上文结合图 5所示的控制信道逻辑单元与物理资源块的对应关系示意图， 对本发明实施例进行了详细说明。应理解， 图 5所示的控制信道逻辑单元是小 区特定的， 即基站对每个小区分配控制信道逻辑单元集合， 小区内的被调度的 每个用户设备的 E-PDCCH对应于该控制信道逻辑单元集合中的至少一个控制 信道逻辑单元。 因此， 形成每个用户设备的检测成功的 E-PDCCH的第一个控 制信道逻辑单元的序号不同。本发明实施例仅以控制信道逻辑单元是小区特定 的为例进行说明， 但本发明实施例并不限于此。
控制信道逻辑单元也可以是用户设备特定的，即基站对每个被调度的用户 设备分配控制信道逻辑单元集合，每个被调度的用户设备的 E-PDCCH对应于 各自的控制信道逻辑单元集合中的至少一个控制信道逻辑单元。 因此， 形成每 个用户设备的检测成功的 E-PDCCH的第一个控制信道逻辑单元的序号可能相 同， 也可能不同， 并且不同用户设备的物理资源块可以是重叠的， 也可以是分 开的， 如图 7所示。 例如， 用户设备 1的物理资源块与用户设备 2的物理资源 块部分重叠， 但都与用户设备 3的物理资源块完全分开。 在此情况下， 用户设 备同样可以根据获取的第一控制信道逻辑单元的序号信息、第一天线端口的天 线端口信息、 偏移量等参数， 此时的偏移量是用户设备特定的， 即基站给每个 用户单独地配置偏移量，确定用于反馈该 ACK/NACK信息的第一和 /或第二控 制信道资源，这时的偏移量可以通过高层半静态配置的方式来通知。进一步地， 在用户设备特定的偏移量的基石出上， 还有一个该用户所属小区特定的偏移量， 这时偏移量就包括两部分，且这两部分都可以通过高层半静态配置的方式来通 知。
因此， 本发明实施例确定控制信道资源的方法，根据与控制信道逻辑单元 相应的天线端口的天线端口信息和偏移量中的至少一种，以及控制信道逻辑单 元的序号信息， 能够动态地确定用于反馈 ACK/NACK信息的控制信道资源， 并且对于不同的用户设备而言能够确定不同的控制信道资源，由此能够避免不 同用户设备之间的控制信道资源冲突的问题。
上文结合图 3至图 7, 详细描述了根据本发明实施例的确定控制信道资源 的方法， 下面将结合图 8至图 9, 描述根据本发明实施例的确定控制信道资源 的用户设备。
图 8示出了根据本发明实施例的确定控制信道资源的用户设备 500的示意 性框图。 如图 8所示， 该用户设备 500包括：
检测模块 510, 用于检测基站发送的承载下行数据信道的调度信息的下行 控制信道， 该下行控制信道由至少一个控制信道逻辑单元形成，且该至少一个 控制信道逻辑单元映射到至少一个天线端口；
获取模块 520, 用于获取与该检测模块 510检测成功的下行控制信道的第 一控制信道逻辑单元相对应的第一天线端口的天线端口信息和偏移量中的至 少一种， 以及该第一控制信道逻辑单元的序号信息；
第一确定模块 530, 用于根据该获取模块 520获取的该天线端口信息和该 偏移量中的至少一种以及该序号信息，确定第一控制信道资源， 该第一控制信 道资源用于反馈针对与该检测成功的下行控制信道相应的下行数据信道的 ACK/NACK信息。
本发明实施例的确定控制信道资源的用户设备，根据与控制信道逻辑单元 相应的天线端口的天线端口信息和偏移量中的至少一种，以及控制信道逻辑单 元的序号信息， 能够动态地确定用于反馈 ACK/NACK信息的控制信道资源， 并且对于不同的用户设备而言能够确定不同的控制信道资源，由此能够避免不 同用户设备之间的控制信道资源冲突的问题。
在本发明实施例中，该序号信息是与第一控制信道逻辑单元的序号相关的 信息。该第一控制信道逻辑单元的序号信息包括该第一控制信道逻辑单元中的 第一个控制信道逻辑单元的序号； 应理解， 该序号信息也可以包括该第一控制 信道逻辑单元中的其它控制信道逻辑单元的序号，例如第一控制信道逻辑单元 中与所述控制信道所用的天线端口关联的某个控制信道逻辑单元的序号。该序 号还可以是第一控制信道逻辑单元中的某个控制信道逻辑单元所在的虚拟资 源块或物理资源块的序号，例如该序号信息是第一控制信道逻辑单元中的第一 个控制信道逻辑单元所在的虚拟资
资源块或物理资源块序号变换后的序号，其中所述的一个物理资源块或者虚拟 资源块中包括至少一个控制信道逻辑单元， 例如， 包含的控制信道逻辑单元的 个数是 1 , 2, 3或 4。 该第一天线端口的天线端口信息至少包括该第一天线端 口的序号和该至少一个天线端口的天线端口数量中的一种。
可选地， 该检测模块 510, 具体用于检测基站发送的该下行控制信道， 该 至少一个控制信道逻辑单元映射到至少一个天线端口中的物理资源块，该获取 模块 520 具体用于根据预定义的或被通知的该第一控制信道逻辑单元与该物 理资源块的对应关系， 获取该序号信息和 /或该天线端口信息。
可选地， 该获取模块 520, 具体用于获取该天线端口信息和该偏移量中的 至少一种， 该偏移量是由该基站动态通知的或者由高层半静态配置的。
可选地， 该获取模块 520, 具体用于获取该天线端口信息和该偏移量中的 至少一种，该偏移量是针对该用户设备和该用户设备所属的小区的至少一种设 置的。
在本发明实施例中， 该天线端口可以是解调参考信号 DMRS天线端口。 可选地， 如图 9所示， 该用户设备 500还可以包括：
第二确定模块 540, 用于在采用 SORTD发送该 ACK/NACK信息时， 根 据该第一控制信道逻辑单元中的第一个控制信道逻辑单元之后紧接的控制信 道逻辑单元的序号，以及该第一天线端口之后紧接的第二天线端口的序号中的 至少一种， 确定用于反馈该 ACK/NACK信息的第二控制信道资源。
应理解，第二确定模块 540可以根据该第一天线端口的天线端口信息和偏 移量中的至少一种，以及该第一个控制信道逻辑单元之后紧接的控制信道逻辑 单元的序号，确定该第二控制信道资源。 第二确定模块 540也可以根据该第一 控制信道逻辑单元的序号信息和偏移量中的至少一种，以及该第二天线端口的 序号，确定该第二控制信道资源。 第二确定模块 540还可以根据该第一个控制 信道逻辑单元之后紧接的控制信道逻辑单元的序号以及该第二天线端口的序 号， 或根据该第一个控制信道逻辑单元之后紧接的控制信道逻辑单元的序号、 该第二天线端口的序号和偏移量， 确定该第二控制信道资源。
应理解， 与第一确定模块 530确定第一控制信道资源相类似， 第二确定模 块 540 可以根据该第一个控制信道逻辑单元之后紧接的其它控制信道逻辑单 元的序号， 以及该第一天线端口之后紧接的其它天线端口的序号中的至少一 种， 确定用于反馈 ACK/NACK信息的该第二控制信道资源。 当然， 第二确定 模块 540还可以参考第一控制信道逻辑单元的序号信息、第一天线端口的天线 端口信息和偏移量中的至少一种， 确定该第二控制信道资源。
根据本发明实施例的确定控制信道资源的用户设备 500 可对应于本发明 实施例中的用户设备， 并且用户设备 500中的检测模块 510、 获取模块 520和 第一确定模块 530可以分别用于执行图 3和图 4中的 S110、 S120、 S130以及 S210、 S220、 S230, 用户设备 500 中的第二确定模块 540可以用于执行图 4 中的 S240, 为了简洁， 在此不再贅述。
本发明实施例的确定控制信道资源的用户设备，根据与控制信道逻辑单元 相应的天线端口的天线端口信息和偏移量中的至少一种，以及控制信道逻辑单 元的序号信息， 能够动态地确定用于反馈 ACK/NACK信息的控制信道资源， 并且对于不同的用户设备而言能够确定不同的控制信道资源，由此能够避免不 同用户设备之间的控制信道资源冲突的问题。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示 例的单元及算法步骤， 能够以电子硬件、或者计算机软件和电子硬件的结合来 实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用 描述的功能， 但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到， 为了描述的方便和简洁， 上述描 述的系统、装置和单元的具体工作过程， 可以参考前述方法实施例中的对应过 程， 在此不再贅述。
在本申请所提供的几个实施例中， 应该理解到， 所揭露的系统、 装置和方 法， 可以通过其它的方式实现。 例如， 以上所描述的装置实施例仅仅是示意性 的， 例如， 所述单元的划分， 仅仅为一种逻辑功能划分， 实际实现时可以有另 外的划分方式， 例如多个单元或组件可以结合或者可以集成到另一个系统， 或 一些特征可以忽略， 或不执行。 另外， 所显示或讨论的相互之间的耦合或直接 耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也 可以是电的， 机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为 单元显示的部件可以是或者也可以不是物理单元， 即可以位于一个地方， 或者 也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部 单元来实现本发明实施例方案的目的。
另外， 在本发明各个实施例中的各功能单元可以集成在一个处理单元中， 也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单 元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元 和硬件相结合的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售 或使用时， 可以存储在一个计算机可读取存储介质中。 基于这样的理解， 本发 明的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全 部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储 介质中， 包括若干指令用以使得一台计算机设备（可以是个人计算机，服务器， 或者网络设备等 )执行本发明各个实施例所述方法的全部或部分步骤。 而前述 的存储介质包括： U盘、 移动硬盘、 只读存储器（ROM, Read-Only Memory )、 随机存取存储器（RAM, Random Access Memory ), 磁碟或者光盘等各种可以 存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于 此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易想到 各种等效的修改或替换， 这些修改或替换都应涵盖在本发明的保护范围之内。 因此， 本发明的保护范围应以权利要求的保护范围为准。

Claims

权 利 要 求
1、 一种确定控制信道资源的方法， 其特征在于， 包括：
检测基站发送的承载下行数据信道的调度信息的下行控制信道，所述下行 控制信道由至少一个控制信道逻辑单元形成，且所述至少一个控制信道逻辑单 元映射到至少一个天线端口；
获取与检测成功的下行控制信道的第一控制信道逻辑单元相对应的第一 天线端口的天线端口信息和偏移量中的至少一种，以及所述第一控制信道逻辑 单元的序号信息；
根据所述天线端口信息和所述偏移量中的至少一种以及所述序号信息，确 定第一控制信道资源，所述第一控制信道资源用于反馈针对与所述检测成功的 下行控制信道相应的下行数据信道的确认 ACK/否认 NACK信息。
2、 根据权利要求 1所述的方法， 其特征在于， 所述序号信息包括所述第 一控制信道逻辑单元中的第一个控制信道逻辑单元的序号或者所述第一控制 信道逻辑单元中的其它控制信道逻辑单元的序号。
3、 根据权利要求 1所述的方法， 其特征在于， 所述天线端口信息至少包 括所述第一天线端口的序号和所述至少一个天线端口的天线端口数量中的一 种。
4、 根据权利要求 1所述的方法， 其特征在于， 所述至少一个控制信道逻 辑单元映射到至少一个天线端口， 包括：
所述至少一个控制信道逻辑单元映射到至少一个天线端口中的物理资源 块，
所述获取所述序号信息或所述天线端口信息， 包括：
根据预定义的或被通知的所述第一控制信道逻辑单元与所述物理资源块 的对应关系， 获取所述序号信息和 /或所述天线端口信息。
5、 根据权利要求 1所述的方法， 其特征在于， 所述偏移量是由所述基站 动态通知的或者由高层半静态配置的。
6、 根据权利要求所述的方法， 其特征在于， 所述偏移量是针对用户设备 和所述用户设备所属的小区中的至少一种设置的。
7、 根据权利要求 2至 6中任一项所述的方法， 其特征在于， 所述方法还 包括：
在采用空间正交资源发送分集方案 SORTD发送所述 ACK/NACK信息时， 根据所述第一控制信道逻辑单元中的第一个控制信道逻辑单元之后紧接的控 制信道逻辑单元的序号，以及所述第一天线端口之后紧接的第二天线端口的序 号中的至少一种， 确定用于反馈所述 ACK/NACK信息的第二控制信道资源。
8、 根据权利要求 1至 6中任一项所述的方法， 其特征在于， 所述天线端 口为解调参考信号 DMRS天线端口。
9、 一种确定控制信道资源的用户设备， 其特征在于， 包括：
检测模块，用于检测基站发送的承载下行数据信道的调度信息的下行控制 信道， 所述下行控制信道由至少一个控制信道逻辑单元形成，且所述至少一个 控制信道逻辑单元映射到至少一个天线端口；
获取模块，用于获取与所述检测模块检测成功的下行控制信道的第一控制 信道逻辑单元相对应的第一天线端口的天线端口信息和偏移量中的至少一种， 以及所述第一控制信道逻辑单元的序号信息；
第一确定模块，用于根据所述获取模块获取的所述天线端口信息和所述偏 移量中的至少一种以及所述序号信息，确定第一控制信道资源， 所述第一控制 信道资源用于反馈针对与所述检测成功的下行控制信道相应的下行数据信道 的确认 ACK/否认 NACK信息。
10、 根据权利要求 9所述的用户设备， 其特征在于， 所述序号信息包括所 述第一控制信道逻辑单元中的第一个控制信道逻辑单元的序号或者所述第一 控制信道逻辑单元中的其它控制信道逻辑单元的序号。
11、 根据权利要求 9所述的用户设备， 其特征在于， 所述天线端口信息至 少包括所述第一天线端口的序号和所述至少一个天线端口的天线端口数量中 的一种。
12、 根据权利要求 9所述的用户设备， 其特征在于， 所述检测模块， 具体 用于检测基站发送的所述下行控制信道，所述至少一个控制信道逻辑单元映射 到至少一个天线端口中的物理资源块，
所述获取模块，具体用于根据预定义的或被通知的所述第一控制信道逻辑 单元与所述物理资源块的对应关系， 获取所述序号信息和 /或所述天线端口信 息。
13、 根据权利要求 9所述的用户设备， 其特征在于， 所述获取模块， 具体 用于获取所述天线端口信息和所述偏移量中的至少一种，所述偏移量是由所述 基站动态通知的或者由高层半静态配置的。
14、 根据权利要求 9所述的用户设备， 其特征在于， 所述获取模块， 具体 用于获取所述天线端口信息和所述偏移量中的至少一种，所述偏移量是针对所 述用户设备和所述用户设备所属的小区的至少一种设置的。
15、 根据权利要求 10至 14中任一项所述的用户设备， 其特征在于， 所述 用户设备还包括：
第二确定模块， 用于在采用空间正交资源发送分集方案 SORTD发送所述 ACK/NACK信息时， 根据所述第一控制信道逻辑单元中的第一个控制信道逻 辑单元之后紧接的控制信道逻辑单元的序号，以及所述第一天线端口之后紧接 的第二天线端口的序号中的至少一种， 确定用于反馈所述 ACK/NACK信息的 第二控制信道资源。
16、 根据权利要求 9至 14中任一项所述的用户设备， 其特征在于， 所述 天线端口为解调参考信号 DMRS天线端口。
PCT/CN2012/077637 2011-06-27 2012-06-27 确定控制信道资源的方法和用户设备 WO2013000411A1 (zh)

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