WO2012155753A1 - Dispositif et procédé de transmission - Google Patents

Dispositif et procédé de transmission Download PDF

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Publication number
WO2012155753A1
WO2012155753A1 PCT/CN2012/074292 CN2012074292W WO2012155753A1 WO 2012155753 A1 WO2012155753 A1 WO 2012155753A1 CN 2012074292 W CN2012074292 W CN 2012074292W WO 2012155753 A1 WO2012155753 A1 WO 2012155753A1
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WO
WIPO (PCT)
Prior art keywords
downlink control
control information
information format
transmission mode
search space
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PCT/CN2012/074292
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English (en)
Chinese (zh)
Inventor
吴欣
戴博
夏树强
左志松
Original Assignee
中兴通讯股份有限公司
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Publication of WO2012155753A1 publication Critical patent/WO2012155753A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel

Definitions

  • a radio frame in a Long Term Evolution (LTE) system includes a Frequency Division Duplex (FDD) mode and a Time Division Duplex (TDD).
  • 1 is a schematic diagram of a frame structure of an FDD mode according to the related art.
  • ms millisecond
  • the slots 2i and 2i+1 form a subframe i of length lms.
  • 2 is a schematic diagram of a frame structure of a TDD mode according to the related art. As shown in FIG.
  • a 10 ms radio frame is composed of two half frames of 5 ms in length, and one field includes five lengths of 1 ms.
  • Subframe, subframe i is defined as 2 slots 2i and 2i+1 that are 0.5 ms long.
  • one slot contains seven symbols with a length of 66.7 microseconds (us), and the CP of the first symbol has a length of 5.21 us. The remaining 6 symbols have a length of 4.69m.
  • the version number of LTE corresponds to R8 (Release 8), and the version number corresponding to the added version is R9 (Release 9), and for future LTE-Advance, the version number is R10 (Release 10).
  • the following three types of downlink physical control channels are defined in LTE: Physical Control Format Indicator Channel (PCFICH); Physical Hybrid Automatic Retransmission Request Indicator Channel (PHICH) ); physical downlink control channel (Physical Downlink Control Channel, PDCCH for short).
  • PCFICH Physical Control Format Indicator Channel
  • PHICH Physical Hybrid Automatic Retransmission Request Indicator Channel
  • PDCCH Physical Downlink Control Channel
  • the information carried by the PCFICH is used to indicate the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols of the PDCCH transmitted in one subframe, and is sent on the first OFDM symbol of the subframe.
  • the frequency location is determined by the system downlink bandwidth and the cell identity (ID).
  • the PHICH is used to carry acknowledgement/negative acknowledgement (ACK/NACK) feedback information for uplink transmission data.
  • the number of PHICHs and the time-frequency position can be determined by the system message and the cell ID in the Physical Broadcast Channel (PBCH) of the downlink carrier where the PHICH is located.
  • the PDCCH is used to carry downlink control information (Downlink Control Information, DCI for short), and includes: uplink and downlink scheduling information, and uplink power control information.
  • DCI Downlink Control Information
  • the DCI format (DCI format) is divided into the following types: DCI format 0, DCI format 1, DCI format 1A, DCI format 1B, DCI format 1C, DCI format ID, DCI format 2, DCI format 2A, DCI format 2B, DCI Format 2C, DCI format 3 and DCI format 3 A; etc.;
  • the DCI format 0 is used to indicate the scheduling of the Physical Uplink Shared Channel (PUSCH);
  • DCI format 1, DCI format 1A, DCI format 1B, DCI format 1C, DCI format ID are used in different modes of PDSCH codeword scheduling;
  • DCI format 2A, DCI format 2B, DCI format 2C are used for different modes of space division multiplexing
  • DCI Format 3A is used for different modes of the power control command of the physical uplink control channel (Physical Uplink Control Channel, abbreviated as PUCCH) and PUSCH. Step by step, where the information field transmitted by DCI Format 1 A is as follows:
  • LVRB localized virtual resource block
  • DVRB distributed virtual resource block
  • MCS Modulation and Coding Scheme
  • NDI New Data Indicator
  • RV redundancy version
  • TPC Transmission Power Control
  • DAI downlink allocation index
  • CRC Cyclic Redundancy Check
  • the physical resources of the downlink control channel PDCCH are transmitted in units of Control Channel Elements (CCEs).
  • the size of one CCE is 9 Resource Element Groups (REGs), that is, 36 resource elements. Resource Element), one PDCCH may occupy 1, 2, 4 or 8 CCEs.
  • a tree-like aggregation (Aggregation) is adopted, that is, a PDCCH occupying one CCE can start from an arbitrary CCE position; a PDCCH occupying two CCEs from an even CCE The position starts; the PDCCH occupying 4 CCEs starts from the CCE position which is an integer multiple of 4; the PDCCH occupying 8 CCEs starts from the CCE position which is an integral multiple of 8.
  • Each aggregation level defines a search space, including a common search space and a user equipment (User Equipment, UE for short) (UE-specific) search space.
  • the number of CCEs in the entire search space is determined by the number of OFDM symbols occupied by the control region indicated by the PCFICH in each downlink subframe and the number of groups of PHICH.
  • the UE blindly detects all possible PDCCH code rates in the search space according to the DCI format of the transmission mode.
  • C-RNTI Cellular Network Temporary Identifier
  • CRC Cyclic Redundancy Check
  • DCI format 2B C-RNTI defined UE specific port 7 and port 8 (port
  • DCI format 1 A common and C-RNTI defined UE specific single antenna port, port
  • Mode 9 MBSFN subframe single antenna port, port 7 up to 8 layers of transmission (up to 8 layer
  • DCI format 2C C-RNTI defined UE specific
  • LTE-Advanced Since the LTE-Advanced network needs to be able to access LTE users, its operating band needs to cover the current LTE frequency band. There is no allocated 100 MHz spectrum bandwidth allocated in this frequency band. Therefore, a direct technology that LTE-Advanced needs to solve is Several component carriers (component carriers) distributed over different frequency bands are aggregated using Carrier Aggregation technology to form a 100 MHz bandwidth that can be used by LTE-Advanced. That is, for the aggregated spectrum, it is divided into n component carrier frequencies (spectrums), and the spectrum in each component carrier frequency (spectrum) is continuous.
  • component carriers component carriers distributed over different frequency bands are aggregated using Carrier Aggregation technology to form a 100 MHz bandwidth that can be used by LTE-Advanced. That is, for the aggregated spectrum, it is divided into n component carrier frequencies (spectrums), and the spectrum in each component carrier frequency (spectrum) is continuous.
  • the original physical downlink control channel PDCCH resources will not be sufficient to meet the new version requirements.
  • the interference problem of the macro base station (Macro eNodeB) to the micro base station (Pico) and the interference of the home eNodeB to the macro base station (Macro eNodeB) due to strong interference of different base station types Need to be well resolved.
  • reducing the load of the PDCCH will be an effective solution for solving the above problem.
  • the transmission mode design scheme for reducing the load of the PDCCH has not been determined, thereby causing inconvenience to practical applications.
  • the embodiments of the present invention provide a transmission method and apparatus to solve at least the problem of a transmission mode design scheme that has not been determined in the related art to reduce the load requirement of a PDCCH.
  • a transmission method is provided.
  • the transmission method according to the embodiment of the present invention includes: setting a transmission mode X; transmitting downlink control information to a user equipment by using a downlink control information format corresponding to the transmission mode X, where the downlink control information format includes at least one of the following: a downlink control information format 1A, The downlink control information format 0, the downlink control information format Y1, and the downlink control information format ⁇ 2.
  • the transmission mode X is the downlink transmission mode
  • the downlink control information in the transmission mode X when the cyclic check code in the downlink control channel is scrambled by the cell radio network temporary identifier C-RNTI,
  • the transmission mode X includes: in the public search space and the user equipment-specific search space defined by the C-RNTI, the downlink control information format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity; or, in the common search space, the downlink is adopted.
  • the control information format 1A indicates the transmission mode of the single antenna port or the transmission diversity.
  • the downlink control information format Y1 is used to indicate the transmission mode of the single antenna port or the transmission diversity; or, in the public
  • the downlink control information format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity, and the downlink control is adopted in the user equipment-specific search space defined by the C-RNTI.
  • the information format Y1 indicates the transmission mode of a single antenna port or transmission diversity.
  • setting the transmission mode X includes: In the public search space and the user equipment-specific search space defined by the C-RNTI, the downlink control information format 0 is used to indicate the transmission mode of the single antenna port, and the downlink control information is used in the user equipment-specific search space defined by the C-RNTI.
  • the format ⁇ 2 indicates the closed-loop spatial multiplexing single-layer transmission mode; or, in the common search space, the downlink control information format 0 indicates the transmission mode of the single-antenna port, and the user equipment-defined search defined in the C-RNTI
  • the downlink control information format Y2 is used to indicate the closed-loop spatial multiplexing single-layer transmission mode; or, in the common search space, the downlink control information format 0 is used to indicate the transmission mode of the single-antenna port, and the user equipment defined in the C-RNTI
  • the downlink control information format Y2 is used to indicate the transmission mode of the single antenna port.
  • the information domain of the downlink control information format Y1 includes at least one or a combination of: a carrier indication domain, a bit field that distinguishes DCI formats 1A and 0, a centralized and distributed virtual resource allocation selection bit, a resource block allocation, and a modulation and coding manner.
  • the information domain of the downlink control information format Y2 includes at least one or a combination of the following: Domain, bit field of DCI format 1A and 0, FM selection bit, resource block allocation, modulation and coding mode and redundancy version, new data indication, redundancy version, transmission power control of physical uplink shared channel, proprietary demodulation reference Signal, cyclic shift of orthogonal sequence index, uplink cable I, downlink allocation index, channel state information request, channel sounding reference signal request, resource allocation type.
  • the transmission mode X is the downlink transmission mode
  • the downlink control information in the transmission mode X when the cyclic check code in the downlink control channel is scrambled by the cell radio network temporary identifier C-RNTI,
  • the transmission mode X includes: in the common search space and the user equipment-specific search space defined by the C-RNTI, the downlink control information format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity, and the user equipment defined in the C-RNTI is exclusive.
  • the downlink control information format Y1 is used to indicate the transmission mode of the multi-layer transmission; or, in the common search space, the downlink control information format 1 A is used to indicate the transmission mode of the single antenna port or the transmission diversity, which is defined in the C-RNTI. In the user equipment-specific search space, the downlink control information format Y1 is used to indicate the transmission mode of the multi-layer transmission.
  • setting the transmission mode X includes: In the public search space and the user equipment-specific search space defined by the C-RNTI, the downlink control information format 0 is used to indicate the transmission mode of the single antenna port, and the downlink control information is used in the user equipment-specific search space defined by the C-RNTI.
  • the format Y2 indicates the transmission mode of the closed-loop spatial multiplexing; or, in the common search space, the downlink control information format 0 indicates the transmission mode of the single antenna port, and the downlink control is adopted in the user equipment-specific search space defined by the C-RNTI.
  • the information format Y2 represents the transmission mode of closed-loop spatial multiplexing.
  • the information domain of the downlink control information format Y1 includes at least one or a combination of: a carrier indication domain, a resource allocation header, a resource block allocation, a transmission power control of a physical uplink control channel, a downlink allocation index, a HARQ process number, and an antenna port.
  • the information field of downlink control information format Y2 includes the following One less or combination: carrier indication domain, resource block allocation, transmission power control of physical uplink shared channel, proprietary demodulation reference signal, cyclic shift of orthogonal sequence index, uplink index, downlink allocation index, channel state information request Channel sounding reference signal request, resource allocation type, precoding information and layer number information, modulation and coding mode of transport block one, new data indication of transport block one, redundancy version of transport block one, modulation and coding mode of transport block two , the new data indication of transport block 2, the redundant version of transport block 2.
  • the transmission mode X is the downlink transmission mode
  • the downlink control information in the transmission mode X when the cyclic check code in the downlink control channel is scrambled by the cell radio network temporary identifier C-RNTI,
  • the transmission mode X includes: in the common search space and the user equipment-specific search space defined by the C-RNTI, the downlink control information format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity, where the port number is port 0, in the C - In the user equipment-specific search space defined by the RNTI, the downlink control information format Y1 is used to indicate the transmission mode of the single antenna port, and the port number is any one of ports 7 and 8, or any one of ports 7, 8, 9, and 10.
  • the downlink control information format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity, where the port number is port 0, which is exclusive to the user equipment defined in the C-RNTI.
  • the downlink control information format Y1 is used to indicate the transmission mode of the single antenna port, where the port number is port 7. Any one of 8 and 8, or any one of ports 7, 8, 9 and 10, or fixed to port 7; or, in the common search space, the downlink control information format 1 A indicates the transmission of a single antenna port or transmission diversity The port number is port 0.
  • the downlink control information format Y1 is used to indicate the transmission mode of the single antenna port or the transmission diversity, where the port number is port 7 and 8. Either of them, or any of ports 7, 8, 9, and 10, or fixed to port 7.
  • the information domain of the downlink control information format Y1 includes at least one or a combination of: a carrier indication domain, a resource allocation header, a resource block allocation, a transmission power control of a physical uplink control channel, a downlink allocation index, a HARQ process number, and an antenna port.
  • the information field of the downlink control information format Y1 includes at least one or a combination of the following : carrier indication field, resource allocation header, resource block allocation, modulation and coding mode, number of HARQ processes, new data indication, redundancy version, transmission power control of the physical uplink control channel, and downlink allocation index.
  • the load of the downlink control information format Y1 is the same as the load of the downlink control information format Y2.
  • the information field of the downlink control information format Y1 includes bits and added bits that distinguish the downlink control information formats Y1 and Y2, and the downlink control information format Y2
  • the information field contains bits and added bits that distinguish the downlink control information formats Y1 and Y2.
  • the resource allocation bits used include at least one of the following:
  • the resource allocation bit is ceil (log2 ( DD ) + X bits, where NDL is the physical medium corresponding to the downlink bandwidth
  • NDL is the physical medium corresponding to the downlink bandwidth
  • the number of resource blocks, ceil ( log2 (NDD ) is the starting position of the resource block, X bits are the number of resource blocks, X is 1 or 2 or 3; only the method of continuous resource allocation; the method of continuous resource allocation
  • the number of allocated resource blocks is a multiple of the number of resource blocks included in the resource group.
  • a transmission apparatus configured to set a transmission mode X; a sending module, configured to pass the transmission mode
  • the downlink control information format corresponding to the X sends the downlink control information to the user equipment, where the downlink control information format includes at least one of the following: a downlink control information format 1A, a downlink control information format 0, a downlink control information format Y1, and a downlink control information format ⁇ 2.
  • the embodiment of the present invention provides a transmission mode design scheme.
  • the design of the transmission mode and the corresponding PDCCH load reduction can improve the capacity of the PDCCH and reduce the blocking rate of the PDCCH, which is convenient for practical applications.
  • the accompanying drawings are intended to provide a further understanding of the embodiments of the invention 1 is a schematic diagram of a frame structure of an FDD mode according to the related art;
  • FIG. 2 is a schematic diagram of a frame structure of a TDD mode according to the related art;
  • FIG. 3 is a flowchart of a transmission method according to an embodiment of the present invention;
  • a block diagram of the transmission device is a schematic diagram of a frame structure of an FDD mode according to the related art.
  • FIG. 3 is a flowchart of a transmission method according to an embodiment of the present invention. As shown in FIG. 3, the following steps S302 to S304 are included. Step S302, setting the transmission mode X.
  • Step S304 Send downlink control information to the user equipment by using a downlink control information format corresponding to the transmission mode X, where the downlink control information format includes at least one of the following: a downlink control information format 1A, a downlink control information format 0, and a downlink control information format Y1.
  • the downlink control information format is ⁇ 2.
  • a transmission mode design scheme for reducing the load requirement of the PDCCH has not been determined.
  • a transmission mode design scheme is provided. The design of the transmission mode and the corresponding PDCCH load reduction can improve the capacity of the PDCCH and reduce the blocking rate of the PDCCH, which is convenient for practical applications.
  • the present invention provides five sets of detailed schemes and their methods of use, respectively, which are respectively described below.
  • the transmission mode X is the downlink transmission mode
  • the downlink control information in the transmission mode X when the cyclic check code in the downlink control channel is scrambled by the cell radio network temporary identifier C-RNTI, the first group is set.
  • the transmission mode X includes: in the public search space and the user equipment-specific search space defined by the C-RNTI, the downlink control information format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity; or, in the common search space, the downlink is adopted.
  • the control information format 1A indicates the transmission mode of the single antenna port or the transmission diversity.
  • the downlink control information format Y1 is used to indicate the transmission mode of the single antenna port or the transmission diversity; or, in the public
  • the downlink control information format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity, and the downlink control is adopted in the user equipment-specific search space defined by the C-RNTI.
  • the information format Y1 indicates the transmission mode of a single antenna port or transmission diversity.
  • setting the transmission mode X includes: In the user equipment-specific search space defined by space and C-RNTI, the downlink control information format 0 is used to indicate the single In the user equipment-specific search space defined by the C-RNTI, the downlink control information format Y2 is used to represent the closed-loop spatial multiplexing single-layer transmission mode; or, in the common search space, the downlink control information format is adopted. Indicates the transmission mode of the single-antenna port.
  • the downlink control information format Y2 is used to indicate the closed-loop spatial multiplexing single-layer transmission mode; or, in the common search space, the downlink control information is used.
  • the format 0 indicates the transmission mode of the single antenna port.
  • the downlink control information format Y2 is used to indicate the transmission mode of the single antenna port.
  • the information domain of the downlink control information format Y1 includes at least one or a combination of: a carrier indication domain, a bit field that distinguishes DCI formats 1A and 0, a centralized and distributed virtual resource allocation selection bit, a resource block allocation, and a modulation and coding manner.
  • the information domain of the downlink control information format Y2 includes at least one or a combination of the following: Domain, bit field of DCI format 1A and 0, FM selection bit, resource block allocation, modulation and coding mode and redundancy version, new data indication, redundancy version, transmission power control of physical uplink shared channel, proprietary demodulation reference Signal, cyclic shift of orthogonal sequence index, uplink cable I, downlink allocation index, channel state information request, channel sounding reference signal request, resource allocation type.
  • the transmission mode X is the downlink transmission mode
  • the downlink control information in the transmission mode X when the cyclic check code in the downlink control channel is scrambled by the cell radio network temporary identifier C-RNTI,
  • the transmission mode X includes: in the common search space and the user equipment-specific search space defined by the C-RNTI, the downlink control information format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity, and the user equipment defined in the C-RNTI is exclusive.
  • the downlink control information format Y1 is used to indicate the transmission mode of the multi-layer transmission; or, in the common search space, the downlink control information format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity, and the user defined in the C-RNTI In the device-specific search space, the downlink control information format Y1 is used to indicate the transmission mode of the multi-layer transmission.
  • setting the transmission mode X includes:
  • the downlink control information format 0 is used to indicate the transmission mode of the single antenna port.
  • the downlink control information format Y2 is used.
  • the transmission mode of the closed-loop spatial multiplexing; or, in the common search space, the downlink control information format 0 indicates the transmission mode of the single antenna port, and in the user equipment-specific search space defined by the C-RNTI, the downlink control information format Y2 is adopted.
  • the information domain of the downlink control information format Y1 includes at least one or a combination of: a carrier indication domain, a resource allocation header, a resource block allocation, a transmission power control of a physical uplink control channel, a downlink allocation index, a HARQ process number, and an antenna port.
  • the information field of the downlink control information format Y2 includes at least one or a combination of: a carrier indication field, a resource block allocation, a transmission power control of a physical uplink shared channel, a proprietary demodulation reference signal, Cyclic shift of orthogonal sequence index, uplink index, downlink allocation index, channel state information request, channel sounding reference signal request, resource allocation type, precoding information and layer number information, modulation and coding mode of transport block one, transport block one New data indication, redundant version of transport block one, transport block Modulation and coding scheme, two new data transmission block indication, a redundancy version of the two transport blocks.
  • the transmission mode X is the downlink transmission mode
  • the third group is set.
  • the transmission mode X includes: in the common search space and the user equipment-specific search space defined by the C-RNTI, the downlink control information format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity, where the port number is port 0, in the C - In the user equipment-specific search space defined by the RNTI, the downlink control information format Y1 is used to indicate the transmission mode of the single antenna port, and the port number is any one of ports 7 and 8, or any one of ports 7, 8, 9, and 10.
  • the downlink control information format 1 A is used to indicate the transmission mode of the single antenna port or the transmission diversity, where the port number is port 0, and the user equipment defined in the C-RNTI is dedicated.
  • the downlink control information format Y1 is used to indicate the transmission mode of the single antenna port, where the port number is port 7 and 8 Any one of the ports 7, 8, 9, and 10, or fixed to the port 7; or, in the common search space, the downlink control information format 1A indicates the transmission mode of the single antenna port or the transmission diversity, where The port number is port 0.
  • the downlink control information format Y1 is used to indicate the transmission mode of the single antenna port or the transmission diversity, where the port number is any one of ports 7 and 8. Either port 1, 8, 9, or 10, or fixed to port 7.
  • the information domain of the downlink control information format Y1 includes at least one or a combination of: a carrier indication domain, a resource allocation header, a resource block allocation, a transmission power control of a physical uplink control channel, a downlink allocation index, a HARQ process number, and an antenna port.
  • the information field of the downlink control information format Y1 includes at least one or a combination of the following : carrier indication field, resource allocation header, resource block allocation, modulation and coding mode, number of HARQ processes, new data indication, redundancy version, transmission power control of the physical uplink control channel, and downlink allocation index.
  • the load of the downlink control information format Y1 is the same as the load of the downlink control information format Y2.
  • the information field of the downlink control information format Y1 includes bits and added bits that distinguish the downlink control information formats Y1 and Y2, and the downlink control information format Y2
  • the information field contains bits and added bits that distinguish the downlink control information formats Y1 and Y2.
  • the resource allocation bits used include at least one of the following:
  • the resource allocation bit is ceil (log2 ( DD ) + X bits, where NDL is the physical medium corresponding to the downlink bandwidth
  • NDL is the physical medium corresponding to the downlink bandwidth
  • the number of resource blocks, ceil ( log2 (NDD ) is the starting position of the resource block, X bits are the number of resource blocks, X is 1 or 2 or 3; only the method of continuous resource allocation; the method of continuous resource allocation
  • the number of allocated resource blocks is a multiple of the number of resource blocks included in the resource group.
  • the value of the resource block group size P is expanded.
  • the number of the modulation and coding mode bits is 2, 3, 4 or 5.
  • the downlink control information format DCI Format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity;
  • the downlink control information format Y1 is used to indicate the transmission mode of the transmission diversity.
  • Table 3 Correspondence table of the downlink transmission mode, DCI format, search space, and transmission scheme
  • Non-MBSFN subframe If PBCH antenna
  • MBSFN subframe single antenna port, port 7
  • the downlink control information format Y1 is a downlink control information format for reducing the load of the downlink control information format 1A. Specifically, the resource allocation bits and the modulation and coding mode bits of the downlink control information format 1A are changed, and the format 0/1 A distinguishing bits are deleted.
  • the transmission mode X is the uplink transmission mode
  • the downlink control information in the transmission mode X when the cyclic check code in the downlink control channel is scrambled by the cell radio network temporary identifier: in the common search space and the cell radio network
  • the downlink control information format DCI Format 0 is used to indicate the transmission mode of the single antenna port; in the user equipment-specific search space defined by the C-RNTI, the downlink control is adopted.
  • the information format Y2 indicates the transmission mode of the single antenna port.
  • Table 4 Correspondence table of uplink transmission mode, DCI format, search space and transmission scheme
  • the downlink control information format Y2 is a downlink control information format for reducing the load of the downlink control information format 0. Specifically, the resource allocation bit and the modulation and coding mode bit of the downlink control information format 0 are changed, and the format 0/1 A distinguishing bit is deleted.
  • the downlink control information format Y1 includes the following information fields: a carrier indication field, a bit field that distinguishes DCI formats 1A and 0, a centralized and distributed virtual resource allocation selection bit, a resource block allocation, a modulation and coding scheme, a HARQ process number, and a new data indication. , redundancy version, transmission power control of the physical uplink control channel, downlink allocation index (only in FDD), and channel sounding reference signal (SRS) request.
  • SRS channel sounding reference signal
  • the downlink control information format Y2 contains the following information fields: carrier indication field, bit field distinguishing DCI format 1A and 0, FM selection bit, resource block allocation, modulation coding mode and redundancy version, new data indication, redundancy version, physical Transmission power control of uplink shared channel, cyclic shift of dedicated demodulation reference signal (DMRS) and orthogonal sequence index (OCC), uplink index, downlink allocation index (only in FDD), channel state information (CSI) Request, Channel Sounding Reference Signal (SRS) request and resource allocation type.
  • the resource allocation bit used in the downlink control information format Y1 or Y2 is at least one of the following methods:
  • the resource allocation bit is ceil (log2 (NDD) +1 bit, or ceil (log2 (NDD) + 2 bits, NDL is the number of physical resource blocks corresponding to the downlink bandwidth; ceil (log2 ( NDD) indicates the starting position of the resource block, and 1 bit or 2 bits are used to indicate the number of resource blocks, such as 2 bits indicating that the number of resource blocks is 1, 2, 3 or 4.
  • the type 2 (type 2) continuous resource allocation method is adopted, and the resource element group (REG) is used instead of the physical resource block (PRB) as the minimum. unit.
  • the resource block group size P For example, when the number of resource blocks corresponding to the downlink bandwidth is less than 10, the size of P is 2 or 3.
  • the Modulation and Coding Scheme (MCS) bit number is 2, 3 or 4, and the corresponding modulation mode is only used to indicate the quadrature phase shift keying (QPSK).
  • the number of MCS bits is 3: Table 5 Table of correspondence between MCS, modulation order, and TBS
  • the transmission mode X is the downlink transmission mode
  • the downlink control information in the transmission mode X when the cyclic check code in the downlink control channel is scrambled by the temporary identifier of the cell radio network:
  • the downlink control information format DCI Format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity; defined in the C-RNTI
  • the downlink control information format Y1 is used to indicate the transmission mode of the multi-layer transmission.
  • Table 6 corresponds to the downlink transmission mode, DCI format, search space and transmission scheme.
  • the downlink control information format Y1 is a downlink control information format for reducing the load of the downlink control information format 2C. Specifically, the resource allocation bits and the modulation and coding mode bits of the downlink control information format 2C are changed.
  • the transmission mode X is the uplink transmission mode
  • the cyclic check code in the downlink control channel is scrambled by the cell radio network temporary identifier: in the common search space and the cell radio network In the user equipment-specific search space defined by the temporary identifier (C-RNTI)
  • the downlink control information format DCI Format 0 is used to indicate the transmission mode of the single antenna port; in the user equipment-specific search space defined by the C-RNTI, the downlink control is adopted.
  • the information format Y2 represents the transmission mode of closed-loop spatial multiplexing. As shown in Table 7: Table 7 Correspondence relationship between uplink transmission mode, DCI format, search space and transmission scheme
  • the downlink control information format Y2 is a downlink control information format for reducing the load of the downlink control information format 4. Specifically, the resource allocation bits and the modulation and coding mode bits of the downlink control information format 4 are changed.
  • the downlink control information format Y1 includes the following information fields: a carrier indication field, a resource allocation header, a resource block allocation, a transmission power control of a physical uplink control channel, a downlink allocation index (only in FDD), a HARQ process number, and an antenna port interference. Code identity and layer number, channel sounding Reference Signal (SRS) Request, Modulation and Coding Mode of Transport Block 1, New Data Indication, Modulation and Coding Mode of Redundant Version and Transport Block 2, New Data Indication, Redundant Version.
  • SRS channel sounding Reference Signal
  • the downlink control information format Y2 includes the following information fields: carrier indication domain, resource block allocation, transmission power control of the physical uplink shared channel, cyclic demodulation of the dedicated demodulation reference signal (DMRS) and orthogonal sequence index (OCC), Uplink index, downlink allocation index (only in FDD), channel state information (CSI) request, channel sounding reference signal (SRS) request, resource allocation type, precoding information and layer number information, modulation and coding mode of transport block one , new data indication, modulation version of the redundancy version and transport block 2, new data indication, redundancy version.
  • the resource allocation bit used in the downlink control information format Y1 or Y2 is at least one of the following methods:
  • the resource allocation bit is ceil (log2 (NDD) +1 bit, or ceil (log2 (NDD) + 2 bits, NDL is the number of physical resource blocks corresponding to the downlink bandwidth; ceil (log2 ( NDD) indicates the starting position of the resource block, and 1 bit or 2 bits are used to indicate the number of resource blocks, such as 2 bits indicating that the number of resource blocks is 1, 2, 3 or 4.
  • Type 2 is used for downlink resource allocation. (type 2) The method of continuous resource allocation.
  • the type 2 (type 2) continuous resource allocation method is adopted, and the resource element group (REG, resource element group) is used instead of the physical resource block (PRB) as the minimum unit.
  • REG resource element group
  • PRB physical resource block
  • the resource block group size P is expanded. For example, when the number of resource blocks corresponding to the downlink bandwidth is less than 10, the size of P is 2 or 3.
  • the resource allocation header bit is 0 bits.
  • the Modulation and Coding Scheme (MCS) bit number is 2, 3 or 4, and the corresponding modulation mode is only used to indicate the quadrature phase shift keying (QPSK). As shown in Table 5.
  • the transmission mode X is the downlink transmission mode
  • the downlink control information in the transmission mode X when the cyclic check code in the downlink control channel is scrambled by the temporary identifier of the cell radio network:
  • the downlink control information format DCI Format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity; defined in the C-RNTI
  • the downlink control information format Y1 is used to indicate the transmission mode of the single-layer transmission (or single-antenna port), and the port number is any one of ports 7 and 8, or is in ports 7, 8, 9, and 10. Either one, or fixed to port 7.
  • Table 8 Table 8 Correspondence relationship between downlink transmission mode, DCI format, search space and transmission scheme
  • the downlink control information format Y1 is a downlink control information format 2C, wherein the antenna port, the scrambling code identity, and the number of layers may be 0, 1, or 2 bits.
  • the antenna port is fixed to port 7,; when 1 bit is used, this 1 bit is used to distinguish the port 7 or, or to distinguish between ports 7 and 8, fixed; when 2 bits are used, The antenna port port 7 or 8 is distinguished, and or, as shown in Table 9, when 3 bits are employed, as shown in Table 10.
  • only one modulation block coding mode, new data indication and redundancy version information field are included.
  • the downlink control information format Y1 is a downlink control information format for reducing the load of the downlink control information format 2C or the downlink control information format 1.
  • the resource allocation bit and the modulation and coding mode bits of the downlink control information format 2C are changed, and only one modulation block coding mode (MCS), new data indicator (DI data), and redundancy version (Redundancy Version) are included.
  • MCS modulation block coding mode
  • DI data new data indicator
  • Redundancy Version redundancy version
  • the transmission mode X is the uplink transmission mode
  • the downlink control information in the transmission mode X when the cyclic check code in the downlink control channel is scrambled by the cell radio network temporary identifier: in the common search space and the cell radio network
  • the downlink control information format DCI Format 0 is used to indicate the transmission mode of the single antenna port; in the user equipment-specific search space defined by the C-RNTI, the downlink control is adopted.
  • the information format Y2 indicates the transmission mode of a single layer transmission (or single antenna port). As shown in Table 11: Table 11 Correspondence table of uplink transmission mode, DCI format, search space and transmission scheme
  • the downlink control information format Y2 is used to indicate the transmission mode of the single antenna port only in the user equipment-specific search space defined by the C-RNTI. As shown in Table 6.
  • the downlink control information format Y2 is a downlink control information format for reducing the load of the downlink control information format 4. Specifically, the resource allocation bit and the modulation and coding mode bits of the downlink control information format 4 are changed, and only one modulation block coding mode (MCS) and a new data indicator (DI) bit of the transmission block are included, for precoding and layer The number is 3 bits for 2 antennas and 5 bits for 4 antennas, as shown in Table 12.
  • the downlink control information format Y1 includes the following information fields: a carrier indication field, a resource allocation header, a resource block allocation, a transmission power control of a physical uplink control channel, a downlink allocation index (only in FDD), a HARQ process number, and an antenna port interference.
  • Code identity and layer number Code identity and layer number, channel sounding reference signal (SRS) request, modulation code mode of transport block one, new data indication and redundancy version.
  • the antenna port scrambling identity and layer number bits are 0, 1, or 2 bits.
  • the carrier indication field, the resource allocation header, the resource block allocation, the modulation and coding mode, the number of HARQ processes, the new data indication, the redundancy version, the transmission power control of the physical uplink control channel, and the downlink allocation index (only in the FDD).
  • the downlink control information format Y2 includes the following information fields: carrier indication domain, resource block allocation, transmission power control of the physical uplink shared channel, cyclic demodulation of the dedicated demodulation reference signal (DMRS) and orthogonal sequence index (OCC), Uplink index, downlink allocation index (only in FDD), channel state information (CSI) request, channel sounding reference signal (SRS) request, resource allocation type, precoding information and layer number information, modulation and coding mode of transport block one , new data indication, redundant version.
  • DMRS dedicated demodulation reference signal
  • OCC orthogonal sequence index
  • Uplink index downlink allocation index (only in FDD)
  • CSI channel state information
  • SRS channel sounding reference signal
  • resource allocation type precoding information and layer number information
  • modulation and coding mode of transport block one new data indication, redundant version.
  • the resource allocation bit used in the downlink control information format Y1 or Y2 is at least one of the following methods:
  • the resource allocation bit is ceil (log2 (DD) +1 bit, or ceil (log2 (DL)) + 2 bits, DL
  • the number of physical resource blocks corresponding to the downlink bandwidth; ceil (log2 (NDL)) indicates the starting position of the resource block, and 1 bit or 2 bits are used to indicate the number of resource blocks, for example, 2 bits indicate that the number of resource blocks is 1, 2 3, or 4. Only use the method of continuous resource allocation.
  • the resource block group size P is expanded. For example, when the number of resource blocks corresponding to the downlink bandwidth is less than 10, the size of P is 2 or 3.
  • the PRB is used as the minimum unit; when the discontinuous resource allocation method is adopted, the resource block group size P is not expanded.
  • the downlink control information format Y1 if any one of the methods 1-3, the resource allocation header bit is 0 bits.
  • modulation and coding scheme Modulation and Coding Scheme
  • Embodiment 4 When the transmission mode X is the downlink transmission mode, in the downlink control information in the transmission mode X, when the cyclic check code in the downlink control channel is scrambled by the cell wireless network temporary identifier: in the common search space
  • the downlink control information format DCI Format is used to indicate the transmission mode of the single antenna port or the transmission diversity.
  • the downlink control information format Y1 In the user equipment-specific search space defined by the cell radio network temporary identifier (C-RNTI), the downlink control information format Y1 is used to indicate the Z1 transmission mode.
  • Z1 is one or more of the following transmission modes: transmission diversity single layer transmission (single antenna port) up to 8 layer transmission (up to 8 layer transmission), port 7 - port 14 as shown in Table 13:
  • the downlink control information format Y1 is a downlink control information format for reducing the load of the downlink control information format 1A or 2C. Specifically, the resource allocation bits and the modulation and coding mode bits of the downlink control information format 1A or 2C are changed. Or, while changing the resource allocation and modulation coding mode bits, adding N 0 bits, where N is the load difference number if the load of the downlink control information format Y1 is less than Y2; adding 1 bit is used to distinguish the transmission diversity and The transmission mode of closed-loop spatial multiplexing; adding 1 bit is used to distinguish the downlink control information format Y1 and Y2.
  • the transmission mode X is the uplink transmission mode
  • the downlink control information in the transmission mode X when the cyclic check code in the downlink control channel is scrambled by the temporary identifier of the cell radio network: in the public search space, the downlink is adopted.
  • the control information format DCI Format 0 indicates the transmission mode of the single antenna port or the transmission diversity.
  • the downlink control information format Y2 is used to indicate the Z2 transmission mode, Z1. It is one or more of the following transmission modes: Single layer transmission (single antenna port) Closed loop spatial multiplexing is shown in Table 14. Table 14 Correspondence relationship between uplink transmission mode, DCI format, search space and transmission scheme
  • the downlink control information format Y2 is a downlink control information format for reducing the load of the downlink control information format 0 or 4. Specifically, the resource allocation bits and the modulation and coding mode bits of the downlink control information format 0 or 4 are changed. Or, while changing the resource allocation and modulation coding mode bits, adding N 0 bits, where N is the load difference number if the load of the downlink control information format Y2 is less than Y1; adding 1 bit is used to distinguish the single antenna port. And the closed-loop spatial multiplexing transmission mode; adding 1 bit is used to distinguish the downlink control information formats Y1 and Y2.
  • the downlink control information format Y1 includes the following information fields: a carrier indication field, a resource allocation header, a resource block allocation, a transmission power control of a physical uplink control channel, a downlink allocation index (only in FDD), a HARQ process number, and an antenna port interference.
  • carrier indication domain centralized and distributed virtual resource allocation selection bits, resource block allocation, modulation and coding mode
  • the downlink control information format Y2 includes the following information fields: carrier indication domain, resource block allocation, transmission power control of the physical uplink shared channel, cyclic demodulation of the dedicated demodulation reference signal (DMRS) and orthogonal sequence index (OCC), Uplink index, downlink allocation index (only in FDD), channel state information (CSI) request, channel sounding reference signal (SRS) request, resource allocation type, precoding information and layer number information, modulation and coding mode of transport block one , new data indication, modulation version of the redundancy version and transport block 2, new data indication, redundancy version; or further comprising: distinguishing bits and padding of the downlink control information formats Y1 and Y2.
  • carrier indication field FM selection bit, resource block allocation, modulation and coding mode and redundancy version, new data indication, redundancy version, transmission power control of physical uplink shared channel, proprietary demodulation reference signal (DMRS) and positive Interleaved sequence index (OCC) cyclic shift, uplink index, downlink allocation index (only in FDD), channel state information (CSI) request, channel sounding reference signal (SRS) request, and resource allocation type; or
  • DMRS demodulation reference signal
  • OCC positive Interleaved sequence index
  • CSI channel state information
  • SRS channel sounding reference signal
  • the resource allocation bits used are at least one of the following methods:
  • the resource allocation bit is ceil (log2 (DD) +1 bit, or ceil (log2 (DL)) + 2 bits, and DL is downlink The number of physical resource blocks corresponding to the bandwidth; ceil (log2 (NDL)) indicates the starting position of the resource block, and 1 bit or 2 bits are used to indicate the number of resource blocks, for example, 2 bits indicate that the number of resource blocks is 1, 2, 3 Or 4.
  • the resource block group size P is expanded. For example, when the number of resource blocks corresponding to the downlink bandwidth is less than 10, the size of P is 2 or 3.
  • the PRB is used as the minimum unit; when the discontinuous resource allocation method is adopted, the resource block group size P is not expanded.
  • the resource allocation header bit can be deleted.
  • the Modulation and Coding Scheme (MCS) bit number is 2, 3, 4 or 5.
  • Embodiment 5 When the transmission mode X is the downlink transmission mode, in the downlink control information in the transmission mode X, when the cyclic check code in the downlink control channel is scrambled by the cell wireless network temporary identifier: in the common search space and In the user equipment-specific search space defined by the Cell Radio Network Temporary Identity (C-RNTI), the downlink control information format DCI Format 1A is used to indicate the transmission mode of the single antenna port or the transmission diversity, as shown in Table 15:
  • Table 15 Correspondence table of downlink transmission mode, DCI format, search space and transmission scheme
  • the transmission mode X is the uplink transmission mode
  • the downlink control information in the transmission mode X when the cyclic check code in the downlink control channel is scrambled by the cell radio network temporary identifier: in the common search space and the cell radio network In the user equipment-specific search space defined by the temporary identifier (C-RNTI), the downlink control information format DCI Format 0 is used to indicate the transmission mode of the single antenna port; in the user equipment-specific search space defined by the C-RNTI, the downlink control is adopted.
  • the information format Y2 indicates the transmission mode of the single antenna port.
  • Table 16 Table 16 Correspondence table of uplink transmission mode, DCI format, search space and transmission scheme
  • FIG. 4 is a structural block diagram of a transmission apparatus according to an embodiment of the present invention. As shown in FIG. 4, a setting module 42 and a transmitting module 44 are included . The structure is described in detail below.
  • the setting module 42 is configured to set the transmission mode X.
  • the sending module 44 is connected to the setting module 42 and configured to send downlink control information to the user equipment by using the downlink control information format corresponding to the transmission mode X set by the setting module 42, where the downlink control information is
  • the format includes at least one of the following: a downlink control information format 1A, a downlink control information format 0, a downlink control information format Y1, and a downlink control information format ⁇ 2.
  • the design of the transmission mode and the corresponding PDCCH load reduction can improve the capacity of the PDCCH and reduce the blocking rate of the PDCCH, which is convenient for practical applications.
  • the low-load PDCCH corresponding to the transmission mode can solve the problems of an increase in the number of users and serious interference.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à un procédé et à un appareil de transmission. Le procédé consiste à : déterminer un mode de transmission X ; envoyer des informations de commande de liaison descendante à un équipement utilisateur dans un format d'informations de commande de liaison descendante correspondant au mode de transmission X, le format d'informations de commande de liaison descendante comprenant un format d'informations de commande de liaison descendante 1A et/ou un format d'informations de commande de liaison descendante 0 et/ou un format d'informations de commande de liaison descendante Y1 et/ou un format d'informations de commande de liaison descendante Y2. Dans l'état de la technique, aucune solution de conception d'un mode de transmission nécessaire pour réduire la charge du canal de commande de liaison descendante physique (PDCCH pour Physical Downlink Control CHannel) n'est encore déterminée. Les modes de réalisation de la présente invention proposent une telle solution de conception d'un mode de transmission. Au moyen de l'invention, une conception d'un mode de transmission et de la réduction correspondante de la charge du canal PDCCH, la capacité du canal PDCCH peuvent être améliorées et le taux de congestion du canal PDCCH peut être réduit, ce qui permet de faciliter les applications véritables.
PCT/CN2012/074292 2011-09-29 2012-04-18 Dispositif et procédé de transmission WO2012155753A1 (fr)

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