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WO2014067137A1 - Procédé permettant la détermination d'une ressource de canal de commande, et équipement utilisateur - Google Patents

Procédé permettant la détermination d'une ressource de canal de commande, et équipement utilisateur Download PDF

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Publication number
WO2014067137A1
WO2014067137A1 PCT/CN2012/084009 CN2012084009W WO2014067137A1 WO 2014067137 A1 WO2014067137 A1 WO 2014067137A1 CN 2012084009 W CN2012084009 W CN 2012084009W WO 2014067137 A1 WO2014067137 A1 WO 2014067137A1
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WO
WIPO (PCT)
Prior art keywords
control channel
offset
antenna port
user equipment
sequence number
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2012/084009
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English (en)
Chinese (zh)
Inventor
刘江华
周永行
唐臻飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201280076660.7A priority Critical patent/CN104756429B/zh
Priority to PCT/CN2012/084009 priority patent/WO2014067137A1/fr
Publication of WO2014067137A1 publication Critical patent/WO2014067137A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04L1/1861—Physical mapping arrangements
    • 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 signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to the field of communications, and in particular to a method and user equipment for determining control channel resources in the field of communications. Background technique
  • LTE Long Term Evolution
  • Rd-8/9/10 8/9/10 version (Release 8/9/10, called “Rd-8/9/10”) communication system that uses dynamic scheduling technology.
  • the base station Evolved NodeB, referred to as "eNB”
  • eNB performs scheduling and resource allocation according to the channel condition of each user equipment (User Equipment, called "UE"), so that each The scheduled user equipments are all transmitting on their optimal channels.
  • UE User Equipment
  • the eNB sends a Physical Downlink Shared Channel (“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 CPU is called "PDCCH"
  • the PDSCH carries data transmitted by the eNB to the scheduled user equipment
  • the PDCCH is mainly used to indicate the transmission format of the corresponding PDSCH, that is, scheduling information, including resource allocation, transmission block size, and modulation. Coding mode, transmission rank, precoding matrix information, etc.
  • 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 (“Multiple Input Multiple Output”) technology to improve the spectral efficiency of the communication system, which means that the number of user equipments simultaneously scheduled by the base station is increased, so More PDCCH is needed.
  • Multiple Input Multiple Output 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, called the tube "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 be serviced 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.
  • HARQ Hybrid Automatic Repeat Request
  • an evolved communication system for example, applied to LTE Rel-11. Since the dynamically scheduled user equipment needs to provide uplink feedback confirmation to the eNB
  • 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 the dynamic reservation method, that is, when the PDSCH is scheduled, resources are reserved, and the semi-static reservation method is not suitable.
  • the technical problem to be solved is how to dynamically determine the resources used for uplink feedback ACK/NACK information after the user equipment detects the E-PDCCH and the PDSCH.
  • the feedback of the ACK/NACK information is on the physical uplink control channel.
  • Physical Uplink Control Channel referred to as "PUCCH”
  • PUCCH Physical Uplink Control Channel
  • each user equipment modulates and transmits ACK/NACK information through a sequence of time-frequency two-dimensional spread spectrum, wherein For each dynamically scheduled user equipment, the resources used for uplink feedback ACK/NACK information are controlled channel units of the PDCCH (Control Channel
  • CCE serial number of the Element
  • the E-PDCCH based on the DMRS transmission under different RRUs may occupy the same time-frequency resource and different DMRS ports, different.
  • the E-PDCCH may have the same control channel logical label or sequence number, and thus may cause conflicts in resources for feeding back ACK/NACK information between different user equipments, that is, 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 a downlink control channel that is sent by a base station and carrying scheduling information of a downlink data channel in a transmission mode, and a format of the downlink control channel.
  • 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; acquiring a first offset and a first control channel that detects a successful downlink control channel At least one of antenna port information of the first antenna port corresponding to the logical unit, and sequence number information of the first control channel logic unit and a format of the downlink control channel that is successfully detected;
  • an embodiment of the present invention provides a user equipment for determining a control channel resource, where the user equipment includes: a detection module, configured to detect a downlink control channel that is sent by a base station and carries scheduling information of a downlink data channel in a transmission mode. And a format of the downlink control 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;
  • An acquiring module configured to acquire at least one of a first offset and antenna port information of a first antenna port corresponding to a first control channel logical unit of a downlink control channel that is successfully detected by the detecting module, and Sequence number information of the first control channel logic unit and a format of the downlink control channel that is successfully detected;
  • a first determining module configured to: according to the at least one of a format of the control channel and the transmission mode, and the antenna port information and the first offset acquired by the acquiring module Determining, by the at least one, and the sequence number information, a first control channel resource, where the first control channel resource is used to feed back an acknowledgement ACK/deny NACK for a downlink data channel corresponding to the successfully detected downlink control channel information.
  • 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.
  • FIG. 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. detailed description
  • GSM Global System of Mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • General Packet Radio Service General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • Universal Mobile Telecommunication System 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, called “MS”), and a mobile terminal (Mobile).
  • UE User Equipment
  • MS Mobile Station
  • Mobile 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", , a telephone, a computer having a mobile terminal, etc., 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.
  • RAN Radio Access Network
  • the base station may be a base station (Base Transceiver Station, referred to as "BTS") in GSM or CDMA, or may be a base station (NodeB, a tube called “NB") in WCDMA, or may be
  • BTS Base Transceiver Station
  • NodeB a base station
  • NB base station
  • LTE evolved base station
  • the embodiment of the present invention is not limited to the base station and the user equipment, but for convenience of description, the following embodiments will be based on the eNB and the UE. The example is explained.
  • FIG. 1 shows a schematic diagram of PDCCH and PDSCH multiplexing according to an embodiment of the present invention.
  • the PDCCH and the PDSCH are time-division multiplexed in one subframe.
  • a general cyclic prefix is taken as an example.
  • Each subframe (1 ms) includes two slots, and each slot includes 7 orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing).
  • each OFDM symbol includes NRBx12 resource elements (Resource Element, referred to as "RE"), and NRB is the number of resource blocks (Resource Blocks, referred to as "RBs") corresponding to the system bandwidth;
  • PCCICH Physical Control Format Indicator Channel
  • a PDCCH for uplink scheduling in addition to the foregoing PDCCH for downlink scheduling, a PDCCH for uplink scheduling, and a Physical Hybrid ARQ Indicator Channel for uplink HARQ transmission ACK/NACK information are further included.
  • the cartridge is referred to as "PHICH” and a PCFICH for indicating the number of OFDM symbols included in the PDCCH region.
  • PHICH Physical Hybrid ARQ Indicator Channel for uplink HARQ transmission ACK/NACK information
  • PCFICH Physical Hybrid ARQ Indicator Channel for uplink HARQ transmission ACK/NACK information
  • the cartridge is referred to as "PHICH” and a PCFICH for indicating the number of OFDM symbols included in the PDCCH region.
  • PHICH Physical Hybrid ARQ Indicator Channel for uplink HARQ transmission ACK/NACK information
  • PCFICH Physical Hybrid ARQ Indicator Channel for uplink HARQ transmission ACK/NACK information
  • 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-multiplexed in one sub-portion. 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 pair.
  • the number of DMRSs 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. As shown in FIG. 3, the method 100 includes:
  • S120 Acquire at least one of antenna port information and an offset of a first antenna port corresponding to a first control channel logic unit that detects a successful downlink control channel, and sequence number information of the first control channel logic unit. Detecting the format of a successful downlink control channel;
  • S130 Determine, according to a format of the control channel or a transmission mode of the scheduled downlink data channel, at least one of the antenna port information and the offset, and the sequence number information, to determine a first control channel resource, where the first The control channel resource is used to feed back ACK/NACK information for the downlink data channel corresponding to the downlink control channel that is successfully detected.
  • 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.
  • the sequence number information of the control channel logic unit, and the format of the control channel or the transmission mode of the scheduled downlink data channel dynamically determine control channel resources for feeding back ACK/NACK information, and for different user equipments It is possible to determine different control channel resources, thereby avoiding the problem of control channel resource conflicts between different user equipments.
  • 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 and a format of the scheduling information of the downlink data channel carrying the specific transmission mode transmitted by the base station.
  • the downlink control channel may include an E-PDCCH
  • the downlink data channel may include PDSCH.
  • the transmission mode of the PDSCH may be a single antenna port transmission mode (TM1) based on a cell-specific reference signal, an open loop transmission diversity transmission mode (TM2), an open loop multiplexed transmission mode (TM3), and a closed loop multiplexed transmission mode ( TM4), multi-user MIMO transmission mode (TM5), single-stream closed-loop multiplex transmission mode (TM6), single-stream beamforming transmission mode (TM7), dual-stream beamforming transmission mode (TM8), user-specific Multi-stream multiplexing of reference signals, supporting transmission modes of up to 8 streams (TM9) and multi-stream multiplexing based on user-specific reference signals and supporting multi-point joint transmission (CoMP) transmission modes (10);
  • the transmission mode of the PDSCH is part or all of the PDSCH transmission mode defined in the LTE Rel-11 protocol (3GPP TS 36.213 V11.0.0 or its subsequent protocol version).
  • each downlink data channel transmission mode there are at least two formats of the control channel to be used, the size of the control channel in different formats, and the transmission scheme of the scheduled data channel PDSCH, resource allocation, etc., which may be DCI format lA, 1, IB, 1D, 2, 2A, 2B, 2C, 2D.
  • the control channel format used in the transmission mode 9 of the PDSCH includes DCI format 1A and DCI format 2C.
  • the control channel format supported in each PDSCH transmission mode is defined in the LTE Rel-11 protocol (3GPP TS 36.213 V11.0.0 or its subsequent protocol version).
  • the E-PDCCH carries scheduling information of the PDSCH, the E-PDCCH is formed by at least one control channel logic unit, and the at least one control channel logical unit is mapped to a physical resource block in the 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 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, and therefore 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. If the resource flexibility of the E-PDCCH is too flexible, the blind detection complexity of the user is increased. In order to trade off the blind detection complexity and the E-PDCCH transmission efficiency, the resource granularity of the E-PDCCH may be defined, where the resource granularity may be defined as the aggregation level of the control channel logical unit.
  • 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 or ECCE.
  • one physical resource block pair corresponds to four ECCEs, namely ECCE0, ECCE1, ECCE2, ECCE3, and there are four antenna ports in the physical resource block pair, respectively DMRS ports 107, 108, 109, 110, then each ECCE is associated with a DMRS port.
  • the EPDCCH When an EPDCCH is aggregated by one ECCE, the EPDCCH may be mapped to one of the four ECCEs in the pair of physical resource blocks, and mapped to the DMRS port associated with the ECCE; when one EPDCCH is aggregated by two ECCEs, This EPDCCH may be mapped to two ECCEs in the pair of physical resource blocks, such as (ECCEO, ECCE1) or (ECCE2, ECCE3), and one of the two DMRS ports associated with the two ECCEs mapped, such as a DMRS port. 107; When an EPDCCH is aggregated by 8 ECCEs, the EPDCCH can be mapped to two physical resources.
  • the four ECCEs in each physical resource block pair are mapped to one DMRS port, and the DMRS ports mapped in the two physical resource block pairs may be the same or different.
  • the user equipment can obtain the content of the EPDCCH and the format of the EPDCCH.
  • the detected EPDCCH is DCI format 1A.
  • the user equipment acquires at least one of antenna port information and an offset, and sequence number information and a format of a downlink control channel that is successfully detected.
  • 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 logical 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 the first control channel logic unit in the first control channel logic unit or a sequence number converted by the sequence number of the first control channel logic unit, for example, the transformation is performed by interleaving or other The form of the function is expressed.
  • the sequence number information may also include the sequence numbers of other control channel logic units in the first control channel logic unit, such as a certain control channel logic associated with the antenna port used by the control channel in the first control channel logic unit.
  • the serial number of the unit 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 the first control channel logic unit in the first control channel logic unit or a sequence number converted by the sequence number of the first control channel logic unit, for example, the transformation is
  • 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.
  • a sequence number of a single block number, wherein the one physical resource block or the virtual resource block includes at least one control channel logical unit, for example, the number of control channel logical units included is 1, 2, 3 or 4.
  • the antenna port information is related information of a first antenna port where a 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 first antenna end where the block is located Information is included in the antenna port information.
  • 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 and/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 the same or not the same, the offset is
  • the upper limit is semi-statically configured or dynamically notified by the control channel, and the offset may also include two parts, one part is semi-statically configured through the upper layer, and the other part is dynamically notified through the control channel, that is, the above
  • the offset includes a first offset and a second offset, the first offset being semi-statically configured by a higher layer, the second offset being dynamically notified by the control channel.
  • the offset may also be set for the cell to which the user equipment belongs, that is, the offset of the user equipment in one cell is the same, and the offset may also be set for the user equipment and the cell where the user is located, that is, the offset
  • the shift includes two parts, the first 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 user equipment may determine, according to the successfully detected E-PDCCH, the first component that constitutes the E-PDCCH.
  • the sequence number of the first antenna port corresponding to the physical resource mapped by the first virtual resource block is n DMRS , where ⁇ 0,1,- - -, N DMR ⁇ 1 ?
  • N DMRS is the number of first antenna ports, such as DMRS
  • the serial number n DMRs of antenna ports 7 and 8 are 0 and 1, respectively. For example, in the embodiment shown in FIG.
  • the sequence number 1 ⁇ of the first virtual resource block of the user equipment 1 is 8, and the sequence number n vRB of the first virtual resource block of the user equipment 2 is 4, and the user equipment 3
  • the sequence number n of the first virtual resource block is 0, the sequence number of the first virtual resource block of the user equipment 4 is 1 , the number of the configured virtual resource blocks is 16, and the sequence number of the first antenna port is DMRS.
  • the number of first antenna ports N S is 1.
  • the sequence number of the first virtual resource block may also adopt a sequence number of the physical resource block corresponding thereto. For example, if the sequence number of the physical resource block corresponding to the first virtual resource block of the user equipment 3 is 6, 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, antenna port information, offset, and a transmission mode of the data channel.
  • the user equipment may determine the first control channel resource according to the obtained sequence number information, antenna port information, offset, and format of the detected control channel.
  • the number of physical resource block pairs in the EPDCCH set configured to the user equipment 1 is 4, wherein the number of ECCEs in each physical resource block pair is 4, and the number of DMRS ports in each physical resource block pair is also 4.
  • the 16 ECEs corresponding to the four EPDCCH physical resource block pairs in the EPDCCH set are respectively 0, 1, 2, ... 15; secondly, the user equipment 1 is allocated to the uplink ACK/NACK resource of the EPDCCH set configured as described above.
  • the shift is N CH .
  • the user equipment 1 obtains the label of the first ECCE of the EPDCCH that is successfully detected as n ECCE , the DMRS port used by the EPDCCH in the physical resource block where the n ECCE is located, and the format of the detected EPDCCH. Then, the ACK/NACK resource is determined according to the following method.
  • the sequence number r K/NACK of the first control channel resource is determined as follows:
  • nACK/NACK Npu CCH + 3 ⁇ 4 C CE + Index
  • offset is dynamically indicated by the EPDCCH, and at least 1 bit in the EPDCCH DCI is explicitly indicated.
  • the value of ffset In each transmission mode of the PDSCH, there are two formats of EPDCCH, one of which is DCI format 1A, which is mainly used in PDSCH fallback or some reconfiguration, and the conditions of the transmission channel may be worse.
  • DCI format 1A the information of the antenna port can be directly used to determine the ACK/NACK resource without adding a few bits in DCI format 1A to solve the problem of ACK/NACK resource conflict, because this will increase the DCI format.
  • the load of lA causes a decrease in performance.
  • In another format because of the normal transmission of the PDSCH, one or more bits can be added to indicate an offset explicitly, so that different users can be flexibly avoided. Conflict between ACK/NACK resources.
  • the user equipment 1 determines a transmission mode of the PDSCH scheduled by the EPDCCH, and in the process of performing blind detection on the EPDCCH, the first ECCE of the EPDCCH that is successfully detected is labeled as n ECCE , and the EPDCCH is located at the n ECCE .
  • the DMRS port used in the physical resource block is then determined according to the following method to determine the ACK/NACK resource.
  • determining the sequence number of the first control channel resource i K/NACK is as follows:
  • n 11 A 1 CK/NACK NP (1 U) CCH + n 11 ECCE + ⁇ offset where offset is dynamically indicated by the EPDCCH, and at least one bit of the EPDCCH DCI explicitly indicates the value of offset.
  • determining the sequence number ni CK/NACK of the first control channel resource is as follows:
  • the transmission mode of the PDSCH is TM10, that is, when the CoMP operation is performed, the number of users scheduled at this time may be increased a lot.
  • a large number of ACK/NACK resources need to be reserved.
  • one or more bits can be added to the EPDCCH to indicate the offset of the ACK/NACK resource, so that the unused resources can be utilized to improve resource utilization.
  • the transmission mode of the PDSCH is other, since the number of users scheduled is not much, it is sufficient to directly use the antenna port to determine the ACK/NACK resource.
  • a resource is a spreading sequence in a resource block.
  • User equipment through The ACK/NACK information is modulated by the spread spectrum sequence and transmitted on one antenna to implement uplink feedback ACK/NACK information, as shown in FIG. 6(A).
  • the method 200 for determining the control channel resource further includes:
  • the user equipment determines a second control channel resource used to feed back the ACK/NACK information.
  • the user equipment may obtain, according to the format of the successfully generated EPDCCH, the sequence number of the control channel logical unit immediately after the first control channel logic unit in the first control channel logic unit, the first antenna port The sequence number of the immediately following second antenna port, and at least one of the offsets indicated in the EPDCCH, determine the second control channel resource.
  • the user equipment may obtain, according to the transmission mode of the PDSCH scheduled by the EPDCCH, the sequence number of the control channel logical unit immediately after the first control channel logic unit in the first control channel logic unit, the first antenna The sequence number of the second antenna port immediately after the port, and at least one of the offsets indicated in the EPDCCH determine the second control channel resource.
  • the user equipment may obtain at least one of antenna port information, an offset of the first antenna port, and an offset indicated in the EPDCCH according to a format of the EPDCCH obtained by the successful detection or a transmission mode of the PDSCH scheduled by the EPDCCH, And determining, by the sequence number of the control channel logic unit immediately after the first control channel logic unit, the second control channel resource.
  • the format of the successfully detected EPDCCH is the first format, such as DCI format 1A
  • the user equipment according to the antenna port information of the first antenna port, the offset, and the control channel immediately after the first control channel logic unit a sequence number of the logical unit, determining the second control channel resource
  • the successfully detected EPDCCH format is the second format, such as DCI format 2C
  • the user equipment according to the offset, the offset indicated in the EPDCCH, and the first
  • the sequence number of the control channel logical unit immediately following the control channel logic unit determines the second control channel resource.
  • the second control channel resource is determined by the amount of shift, and the sequence number of the control channel logical unit immediately following the first control channel logic unit.
  • the PDSCH scheduled by the successfully detected EPDCCH is in the second transmission mode, such as TM9, the user equipment according to the antenna port information of the first antenna port, the offset, and the control immediately after the first control channel logic unit The sequence number of the channel logic unit determines the second control channel resource.
  • the transmission mode of the PDSCH, the sequence number information of the first control channel logic unit, the offset, the offset indicated in the EPDCCH, and the sequence number of the second antenna port determine the second control channel resource.
  • the format of the successfully detected EPDCCH is the first format, such as DCI format 1A
  • the user equipment determines the second control according to the sequence number information of the first control channel logic unit, the offset, and the sequence number of the second antenna port.
  • Channel resource when the format of the successfully detected EPDCCH is the second format, such as DCI format 2C, the user equipment determines the number according to the sequence number information of the first control channel logical unit, the offset, and the offset indicated in the EPDCCH.
  • Two control channel resources are used to allocate to the sequence number information of the first control channel logic unit, the offset, and the offset indicated in the EPDCCH.
  • the user equipment determines the second control channel according to the sequence number information of the first control channel logic unit, the offset, and the offset indicated in the EPDCCH. Resources.
  • the PDSCH scheduled by the successfully detected EPDCCH is in the second transmission mode, such as TM9, the user equipment determines the second according to the sequence number information of the first control channel logic unit, the offset, and the sequence number of the second antenna port. Control channel resources.
  • 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 HARQ can be as follows: In the downlink scheduling, the user equipment needs to be checked. The E-PDCCH and the corresponding PDSCH are measured. If the E-PDCCH detection is successful, the user equipment demodulates the corresponding PDSCH according to the information in the E-PDCCH, and then the user equipment needs to perform uplink demodulation of the PDSCH. 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 ("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 the E-PDCCH of each scheduled user equipment in the small area corresponds to the control channel logic. At least one control channel logic unit in the set of 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 sets The device can also be based on the obtained serial number information of the first control channel logic unit, the antenna port information of the first antenna port, the offset, and the like.
  • the offset at this time is specific to the user equipment, that is, the base station provides each user with a separate
  • the offset is configured to determine the 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.
  • the method for determining the control channel resource according to the format of the successfully detected control channel or the transmission mode of the data channel scheduled by the control channel, the antenna port information of the antenna port corresponding to the control channel logic unit, the offset And at least one of the offsets dynamically indicated by the control channel, and the sequence number information of the control channel logic unit, can dynamically determine control channel resources for feeding back ACK/NACK information, and can determine for different user equipments Different control channel resources, thereby avoiding the problem of control channel resource conflicts between different user equipments.
  • 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 a base station, a downlink control channel carrying a scheduling information of a downlink data channel in a specific transmission mode, and a format thereof, where the downlink control channel is formed by at least one control channel logic unit, and the at least one control The channel logical 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 Sequence number information of the control channel logic unit and the downlink control channel for detecting success Format
  • the first determining module 530 is configured to: according to the at least one of the antenna port information and the offset obtained by the acquiring module 520, and the sequence number information, the format of the control channel or the transmission of the scheduled downlink data channel And determining, by the first control channel resource, the user equipment for determining the control channel resource of the ACK/NACK signal of the downlink data channel corresponding to the downlink control channel that is successfully detected, According to the format of the successfully detected control channel or the transmission mode of the data channel scheduled by the control channel, at least one of the antenna port information and the offset of the antenna port corresponding to the control channel logic unit, and the sequence number of the control channel logic unit Information, capable of 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 avoiding problems 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 a first control channel logic unit in the first control channel logic unit or a sequence number converted by a sequence number of the first control channel logic unit, for example, the transformation is Interleaved or expressed in the form of other functions. It should be understood that the sequence number information may also include the sequence numbers of other control channel logic units in the first control channel logic unit, such as a certain control channel in the first control channel logic unit associated with the antenna port used by the control channel.
  • the serial number of the logical unit is information related to the serial number of the first control channel logical unit.
  • the sequence number may also be that one of the first control channel logic units is a virtual resource block in which the first control channel logic unit in the first control channel logic unit is located, or one of the physical resource blocks or virtual resource blocks included in the virtual resource block.
  • At least one control channel logic unit for example, includes a number of control channel logic units of 1, 2, 3 or 4.
  • the antenna port information of the first antenna port includes at least a sequence number of the first antenna port and an antenna end of the at least one antenna port One of the number of mouths.
  • the detecting module 510 is specifically configured to detect the downlink control channel sent by the base station and a format thereof, 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 used to And obtaining the serial number information and/or the antenna port information according to a predefined or notified correspondence between the first control channel logical unit and the physical resource block.
  • 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: when the ACK/NACK information is sent by using the SORTD, according to a format of the control channel or a transmission mode of the data channel scheduled by the control channel, the first control channel in the first control channel logic unit And determining, by the at least one of a sequence number of the control channel logic unit immediately after the logic unit, an offset of the control channel dynamic indication, and a sequence number of the second antenna port immediately after the first antenna port, for determining the ACK/ The second control channel resource of the NACK information.
  • the second determining module 540 may perform at least one of antenna port information, offset, and offset indicated in the EPDCCH according to a format of the control channel or a transmission mode of the data channel scheduled by the control channel. And determining, by the serial number of the control channel logical unit immediately after the first control channel logic unit, the second control channel resource.
  • the second determining module 540 can also control the format of the channel or the transmission mode of the data channel scheduled by the control channel, according to the sequence number information of the first control channel logic unit, the offset, the offset indicated in the EPDCCH, and the second At least one of the serial number of the antenna port determines the second control channel resource. source.
  • the second determining mode Block 540 may be based on the format of the control channel or the transmission mode of the data channel scheduled by the control channel, the sequence number of the other control channel logic unit immediately following the first control channel logic unit, and the offset of the offset control channel dynamic indication
  • the second control channel resource for feeding back ACK/NACK information is determined by at least one of a quantity and a sequence number of other antenna ports immediately following the first antenna port.
  • 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 execute 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 is not described herein again.
  • the user equipment for determining the control channel resource according to the embodiment of the present invention, according to the format of the successfully checked control channel or the transmission mode of the downlink data channel scheduled by the control channel, the antenna port information and the offset of the antenna port corresponding to the control channel logic unit At least one of the quantities, and the sequence number information of the control channel logic unit, can dynamically determine control channel resources for feeding back ACK/NACK information, and can determine different control channel resources for different user equipments, thereby The problem of control channel resource conflict between different user equipments can be avoided.
  • the mutual 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 components displayed by the unit 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 storage medium includes a plurality of instructions for causing a computer device (which may be a personal computer or a server), including: a USB flash drive, a removable hard disk, a read-only memory (ROM), and a random access memory (RAM). Random Access Memory ), a variety of media that can store program code, such as a disk or a disc.

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

Abstract

L'invention a trait à un procédé permettant la détermination d'une ressource de canal de commande ainsi qu'à un équipement utilisateur. Ledit procédé comprend : la détection d'un canal de commande de liaison descendante qui est envoyé par une station de base et qui porte des informations d'ordonnancement concernant un canal de données de liaison descendante, le canal de commande de liaison descendante étant formé par au moins une unité de logique de canal de commande, et la ou les unités de logique de canal de commande étant mises en correspondance avec un ou plusieurs ports d'antenne; l'acquisition des informations de port d'antenne qui concernent le premier port d'antenne correspondant à la première unité de logique de canal de commande du canal de commande de liaison descendante détectée avec succès et/ou du décalage de ce premier port d'antenne, ainsi que des informations de numéro d'ordre concernant la première unité de logique de canal de commande; et, en fonction des informations de port d'antenne et/ou du décalage ainsi que des informations de numéro d'ordre, détermination d'une première ressource de canal de commande servant au retour d'informations ACK/NACK pour le canal de données de liaison descendante qui correspond au canal de commande de liaison descendante détecté avec succès. Le procédé et l'équipement utilisateur décrits dans les modes de réalisation de la présente invention peuvent déterminer dynamiquement une ressource servant au retour d'informations ACK/NACK.
PCT/CN2012/084009 2012-11-02 2012-11-02 Procédé permettant la détermination d'une ressource de canal de commande, et équipement utilisateur Ceased WO2014067137A1 (fr)

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PCT/CN2012/084009 WO2014067137A1 (fr) 2012-11-02 2012-11-02 Procédé permettant la détermination d'une ressource de canal de commande, et équipement utilisateur

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