WO2013063891A1 - Procédé et système de configuration de ressources pour un signal de référence de démodulation de liaison montante - Google Patents

Procédé et système de configuration de ressources pour un signal de référence de démodulation de liaison montante Download PDF

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Publication number
WO2013063891A1
WO2013063891A1 PCT/CN2012/072445 CN2012072445W WO2013063891A1 WO 2013063891 A1 WO2013063891 A1 WO 2013063891A1 CN 2012072445 W CN2012072445 W CN 2012072445W WO 2013063891 A1 WO2013063891 A1 WO 2013063891A1
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WIPO (PCT)
Prior art keywords
reference signal
demodulation reference
uplink
information
sequence
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PCT/CN2012/072445
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English (en)
Chinese (zh)
Inventor
王瑜新
戴博
孙云锋
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中兴通讯股份有限公司
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Priority to PCT/CN2012/072716 priority Critical patent/WO2013063895A1/fr
Publication of WO2013063891A1 publication Critical patent/WO2013063891A1/fr

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    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the present invention relates to the field of communications, and in particular to a resource allocation method and system for a Demodulation Reference Signal (DMRS).
  • DMRS Demodulation Reference Signal
  • the uplink physical channel of the LTE (Long Term Evolution) system includes a physical random access channel (PRACH), a physical uplink shared channel (PUSCH), and a physical uplink control channel (PUCCH, Physical Uplink). Control Channel).
  • the Uplink Scheduling Information for the PUSCH is sent by the base station to the target user terminal (UE, User Equipment) through a Physical Downlink Control Channel (PDCCH).
  • the uplink scheduling information includes: resource allocation related to the physical uplink shared channel, modulation and coding scheme, and cyclic shift of the DMRS (Cyclic Shift).
  • a system frame contains 10 subframes, each of which contains 2 slots.
  • 1 is a schematic diagram of a conventional cyclic prefix in a slot according to the related art. As shown in FIG. 1, for a normal cyclic prefix (Normal CP), each slot is composed of 6 data symbols and 1 A demodulation reference signal is formed.
  • 2 is a schematic diagram of an extended cyclic prefix in a slot according to the related art. For an extended cyclic prefix (Extended CP), each slot is composed of 5 data symbols and 1 demodulation reference signal. composition.
  • the DM RS consists of a sequence in the frequency domain that is a cyclic shift of the reference signal sequence.
  • the reference signal sequence of the demodulation reference signal may be based on the configuration of the base station, and may implement a sequence hopping or a sequence group hopping (SGH), which may also be referred to as time. SGH mode of slot jump. That is, according to the configuration of the base station, the demodulation reference signals of one user equipment in two time slots in one subframe are different, and vary with the time slot in one system frame according to a certain jump pattern.
  • SGH sequence group hopping
  • PRS Generated by a pseudo-random generator, which is a parameter that varies with time slots, a pseudo-random sequence generator in each radio frame
  • the uplink scheduling information is carried on the physical downlink control channel, and is sent by the base station to the target user equipment in a certain downlink control information format (Downlink Control Information Format, DCI format).
  • DCI format Downlink Control Information Format
  • the downlink control information format is divided into the following types: DCI format O, 1, 1A, 1B, 1C, 1D, 2, 2A, 3, 3A, etc., where DCI format 0 contains uplink scheduling information, and is used for Indicates the scheduling of the physical uplink shared channel PUSCH.
  • the LTE-Advanced system (referred to as LTE-A system) is a next-generation evolution system of the LTE system.
  • the physical uplink shared channel can be transmitted using a single antenna port or multi-antenna port.
  • 3 is a schematic diagram of a baseband signal processing of a physical uplink shared channel transmitted by a multi-antenna port in the LTE-A system of the related art.
  • the LTE-A system when transmitting in a multi-antenna port, the LTE-A system supports one based on one. Or spatial multiplexing of two codewords (CW), each codeword corresponding to one transport block (Transport Block, referred to as TB).
  • FIG. 4 is a schematic diagram of mapping the uplink codeword to layer of the LTE-A system of the related technology. As shown in FIG. 4, the codeword is further mapped to a layer, and each codeword is mapped to one layer or two layers of data.
  • LTE-A uses a precoding technique based on Codebook (also known as codebook).
  • Precoding technology is a channel-side information (Channel Status Information (CSI)).
  • CSI Channel Status Information
  • Techniques for performing pre-processing to improve the performance of multi-antenna systems One way for the transmitter to acquire CSI is through feedback from the receiver.
  • the general method is to save the same codebook at the receiving end and the transmitting end.
  • the receiving end selects a suitable precoding matrix in the codebook according to the current channel condition, and feeds back its index value (PMI) in the set back to the transmitting end, and the transmitting end finds according to the feedback precoding matrix index.
  • PMI index value
  • Precoding the matrix and precoding the transmitted signal Precoding the matrix and precoding the transmitted signal.
  • each layer of data is transmitted.
  • the DMRS is precoded like the layers of data.
  • Demodulation reference signals for different layer data including demodulation reference signals for multi-layer data of the same user equipment for single-user multiple input multiple output system (SU-MIMO), and multi-user multiple input multiple output system (MU-MIMO)
  • Demodulation reference signals of multi-layer data of a plurality of user equipments are orthogonalized by using different demodulation reference signal cyclic shifts (CS) and/or orthogonal masks (OCCs) Differentiate different layer data of user space reuse or distinguish different users.
  • the orthogonal mask OCC is [+1, +1] and [+1, -1], and acts on the demodulation reference signal on two slots (Slot) in one subframe (Subframe).
  • the LTE standard version is Release 8 and Release 9 and the LTE-A standard is Release 10 (Release 10), respectively abbreviated as Rel -8, Rel-9 and Rel-10
  • LTE-A standards may also include subsequent versions, such as Rel-l.
  • the base station can indicate the cyclic shift/OCC information of the demodulation reference signal for the scheduled PUSCH through DCI format 0 and DCI format 4, as shown in Table 1.
  • the base station When the orthogonal reference mask OCC is used to orthogonalize the demodulation reference signal, the base station needs to jointly detect the demodulation reference signals on the two slots in one subframe, thus requiring one user equipment to be two in one subframe.
  • the demodulation reference signal on the time slot must be the same.
  • the SGH method of slot jump in the LTE system cannot be used.
  • the SGH method of subframe jump is proposed in the related art.
  • FIG. 5 is a schematic diagram of downlink coordinated multipoint transmission according to the related art. As shown in FIG.
  • downlink CoMP can be classified into two types: Joint Processing/Joint Transmission (JP/JT for short) and cooperative scheduling/ Coordinated Scheduling/Beamforming (CS/CB for short).
  • JT Joint Processing/Joint Transmission
  • CS/CB cooperative scheduling/ Coordinated Scheduling/Beamforming
  • JT data is simultaneously transmitted from multiple cells, and the transmission data, scheduling, and channel state information are only exchanged between multiple transmission points in the cooperation set
  • CS/CB only the serving cell sends data to the UE, Scheduling and Beamforming information interact in a CoMP collaboration set.
  • Different cells participating in the transmission or cooperation form a cooperation set. For a certain UE, one cell in the cooperation set is a serving cell, and the remaining cells are coordinated cells.
  • FIG. 6 is a schematic diagram of uplink coordinated multipoint transmission of the related art.
  • UE1 transmits data to a base station or a remote radio terminal (RRH) of a serving cell and a coordinated cell, a coordinated cell and a serving cell.
  • the received data is then combined and received.
  • the value is related to the cell ID to which it belongs, and is a cell-specific parameter. Therefore, the sequence group number of the uplink DMRS is determined by the cell ID and the cell-specific parameters configured by the high layer signaling, and is a semi-statically configured parameter.
  • the uplink DMRS of the UE1 and the UE2 may be configured to use the same sequence group number.
  • the sequences can be orthogonalized by CS and/or OCC, reducing interference between UE1 and UE2.
  • the UE1 and the cell 2 of the cell 1 perform uplink coordinated multipoint transmission and the uplink DMRS of the UE1 partially overlaps with the UE2 in the frequency domain, if the sequence group numbers of the UE1 and the UE2 are the same, then the uplink DMRS sequences of the UE1 and the UE2 are between There will be a large cross-correlation peak, and even with OCC, the orthogonality is not very good, and the OCC is also limited by the Doppler shift. At this time, if different root sequences can be configured, the cross-correlation peaks between the sequences can be limited, thereby reducing interference.
  • a new CoMP scenario is introduced in Rel-11, such as CoMP scenario 3 or Comp scenario 4 shown in FIG. 7.
  • the CoMP scenario 4 is If the cell IDs are not the same, CoMP will be 3.
  • the new scenario of Rel-11 such as COMP scenario 4
  • the number of users will be relatively large. If the same bandwidth is configured to achieve orthogonality between UL COMP users and non-COMP users, scheduling restrictions and multiplexing capacity of DMRS will be brought. There may also be problems.
  • the present invention provides a resource allocation method and system for an uplink demodulation reference signal, which solves the problem that the UEs in different technologies cannot implement orthogonality, existence of scheduling restrictions, and insufficient DMRS multiplexing capacity in the prior art.
  • the present invention provides a resource allocation method for an uplink demodulation reference signal, where the base station configures, by the higher layer signaling, N resources or parameter sets for transmitting an uplink demodulation reference signal, and Determining, by the K bits in the downlink control information, one of the N resources or parameter sets for the user terminal to send an uplink demodulation reference signal; the user terminal uses the resource or parameter set indicated by the K bits An uplink demodulation reference signal is sent, where N and K are both positive integers.
  • the above method may also have the following features:
  • the N resources or parameter sets include one or more of the following information: user-specific parameters for determining an uplink demodulation reference signal sequence group number, used to determine an uplink demodulation reference signal sequence User-specific parameters of the shift pattern, cyclic shift information of the high-level signaling configuration, cell-specific parameters for determining the demodulation reference signal sequence shift pattern of the physical shared channel (PUSCH), for determining the physical control channel (PUCCH) demodulation reference signal sequence shift pattern user-specific parameters, group hopping enable indication, sequence hopping enable indication, sequence group hopping non-enable indication, demodulation reference signal orthogonal mask (OCC) enable indication, demodulation reference signal spatial multiplexing layer, sequence group number of uplink demodulation reference signal, virtual cell ID, offset parameter of sequence shift pattern, initial value of cyclic shift jump, uplink solution Adjust the base sequence of the reference signal.
  • user-specific parameters for determining an uplink demodulation reference signal sequence group number used to determine an uplink demodulation reference signal sequence
  • User-specific parameters of the shift pattern
  • the virtual cell ID, the offset parameter of the sequence shift pattern, and the initial value of the cyclic shift jump are user-specific parameters.
  • the downlink control information includes one or more of the following: a downlink control information format, DCI format 0, DCI format 4, and DCI format 1A.
  • the integer between ⁇ is an integer between 1 and 32.
  • the above method may also have the following features:
  • the demodulation reference signal includes: a demodulation reference signal of a physical uplink shared channel (PUSCH), and a demodulation reference signal of a physical uplink control channel (PUCCH).
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • the above method may further have the following feature: the K bit corresponds to a newly added bit or an existing bit in the downlink control information format.
  • the above method may also have the following features:
  • the K bits are carried in a user-specific DCI Format field or a user-specific search space.
  • the above method may also have the following features:
  • the K bit corresponds to one or more of the following information: 3-bit information indicating a cyclic shift and an orthogonal mask index of a demodulation reference signal, request information of a measurement reference signal (SRS), and resource block allocation information High 1-bit or high-bit 2, modulation coding mode and high-order 1 or higher 2 bits of the redundancy version indication information, modulation coding mode and redundancy version indication information of the unenabled transmission block, and physical uplink control channel transmission A power control command, a cyclic shift indicating a demodulation reference signal, an orthogonal mask index, and 3-bit information of an uplink DMRS parameter set.
  • 3-bit information indicating a cyclic shift and an orthogonal mask index of a demodulation reference signal request information of a measurement reference signal (SRS), and resource block allocation information
  • High 1-bit or high-bit 2 modulation coding mode and high-order 1 or higher 2 bits of the redundancy version indication information, modulation coding mode and redundancy version indication information of the unenable
  • the present invention further provides a resource configuration system for an uplink demodulation reference signal, including a base station and a terminal, where the base station includes an uplink demodulation reference signal resource configuration module; and the terminal includes an uplink signal transmission.
  • the management module; the uplink demodulation reference signal resource configuration module is configured to: configure, by the high layer signaling, N resources or parameter sets for transmitting the uplink demodulation reference signal, and indicate by the K bits in the downlink control information.
  • One of the N resources or parameter sets is used by the user terminal to send an uplink demodulation reference signal;
  • the uplink signal transmission management module is configured to: send an uplink demodulation reference by using the resource or parameter set indicated by the K bits. Signal, where N and K are both positive integers.
  • the N resources or parameter sets include one or more of the following information: user-specific parameters for determining an uplink demodulation reference signal sequence group number, used to determine an uplink demodulation reference signal sequence shift User-specific parameters of the bit pattern, cyclic shift information of the high-level signaling configuration, cell-specific parameters for determining the demodulation reference signal sequence shift pattern of the Physical Shared Channel (PUSCH), for determining the physical control channel ( PUCCH) demodulation reference signal sequence shift pattern user-specific parameters, group hopping enable indication, sequence hopping enable indication, sequence group hopping non-enable indication, demodulation reference signal orthogonal mask ( OCC) enable indication, demodulation reference signal spatial multiplexing layer number, sequence group number of uplink demodulation reference signal, virtual cell ID, offset parameter of sequence shift pattern, initial value of cyclic shift jump, uplink demodulation The base sequence of the reference signal.
  • PUCCH physical control channel
  • OCC demodulation reference signal orthogonal mask
  • the virtual cell ID, the offset parameter of the sequence shift pattern, and the initial value of the cyclic shift jump are user-specific parameters.
  • the downlink control information includes one or more of the following: downlink control information format
  • the K bit corresponds to one or more of the following information: 3-bit information indicating a cyclic shift and an orthogonal mask index of a demodulation reference signal, request information of a measurement reference signal (SRS), a resource block
  • 3-bit information indicating a cyclic shift and an orthogonal mask index of a demodulation reference signal request information of a measurement reference signal (SRS), a resource block
  • SRS measurement reference signal
  • the upper 1 bit or the upper 2 bits of the allocation information, the modulation coded mode and the upper 1 or higher 2 bits of the redundancy version indication information, the modulation coding mode and the redundancy version indication information corresponding to the transmission block are not enabled, and the physical uplink control
  • the present invention further provides a mobile terminal, where the mobile terminal includes an uplink signal transmission management module, and the uplink signal transmission management module is configured to: after receiving downlink control information, use downlink control information.
  • the resource or parameter set indicated in the middle sends an uplink demodulation reference signal.
  • the base station configures multiple resources or parameter sets for the user terminal through the high-layer signaling, and dynamically selects multiple resources or one of the parameter sets through the downlink control information, which can save signaling overhead and dynamically configure the DMRS resources of the inter-cell UE or
  • the parameter set is such that the DMRS of the UEs in different cells are orthogonal, overcomes the scheduling limitation, and enhances the multiplexing capacity of the DMRS, so that the UEs in different technologies cannot be orthogonal, the scheduling limitation, and the DMRS multiplexing capacity are insufficient.
  • the problem which improves the transmission performance of the system.
  • 1 is a schematic diagram of a conventional cyclic prefix in one slot of the related art
  • FIG. 2 is a schematic diagram of an extended cyclic prefix in one slot of the related art
  • FIG. 3 is a schematic diagram of a baseband signal processing of a physical uplink shared channel transmitted by a multi-antenna port in an LTE-A system of the related art
  • FIG. 4 is a schematic diagram of mapping of uplink codewords to layers of the LTE-A system of the related art
  • FIG. 5 is a schematic diagram of downlink coordinated multipoint transmission of the related art
  • FIG. 6 is a schematic diagram of uplink coordinated multipoint transmission of the related art
  • FIG. 7 is a schematic diagram of a related art CoMP scene 3 or scene 4;
  • FIG. 8 is a schematic diagram of a resource configuration method of an uplink demodulation reference signal in an embodiment. Preferred embodiment of the invention
  • the resource configuration method of the uplink demodulation reference signal includes:
  • the base station configures, by the high layer signaling, N resources or parameter sets for transmitting the uplink demodulation reference signal, and indicates, by the K bits in the downlink control information, one of the N resources or a parameter set.
  • the user terminal sends an uplink demodulation reference signal;
  • the user terminal sends an uplink demodulation reference signal by using the resource or parameter set indicated by the K bits, where N and K are both positive integers.
  • the N resources or parameter sets include one or more of the following information: user-specific parameters for determining an uplink demodulation reference signal sequence group number, and determining a shift pattern of an uplink demodulation reference signal sequence.
  • User-specific parameters cyclic shift information of high-level signaling configuration, cell-specific parameters for determining a demodulation reference signal sequence shift pattern of a physical shared channel (PUSCH), used to determine a physical control channel (PUCCH) Demodulating the user-specific parameters of the reference signal sequence shift pattern, the group hopping enable indication, the sequence hopping enable indication, the sequence group hopping non-enable indication, and the orthogonal mask (OCC) of the demodulation reference signal Capable of indicating, demodulating the spatial multiplexing layer of the reference signal, the sequence group number of the uplink demodulation reference signal, the virtual cell ID, the offset parameter of the sequence shift pattern, the initial value of the cyclic shift jump, and the uplink demodulation reference signal Base sequence.
  • PUSCH physical shared channel
  • OCCH ortho
  • the virtual cell ID, the offset parameter of the sequence shift pattern, and the initial value of the cyclic shift jump are user-specific parameters.
  • the downlink control information includes one or more of the following: Downstream control information format DCI format 0, DCI format 4, DCI format 1A.
  • the demodulation reference signal includes: a demodulation reference signal of a physical uplink shared channel (PUSCH), and a demodulation reference signal of a physical uplink control channel (PUCCH).
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • the ⁇ bit corresponds to one or more of the following information: 3-bit information indicating a cyclic shift and an orthogonal mask index of a demodulation reference signal, request information of a measurement reference signal (SRS), and resource block allocation information High 1-bit or high-bit 2, modulation coding mode and high-order 1 or higher 2 bits of the redundancy version indication information, modulation coding mode and redundancy version indication information of the unenabled transmission block, and physical uplink control channel transmission A power control command, a cyclic shift indicating a demodulation reference signal, an orthogonal mask index, and 3-bit information of an uplink DMRS parameter set.
  • the ⁇ bit is carried in a user-specific DCI Format field or a user-specific search space.
  • the K bits correspond to newly added bits or existing bits in the downlink control information format.
  • the K bit is a newly added bit in the downlink control information format, the signaling overhead is increased.
  • the K bit is an existing bit in the downlink control information format, the signaling overhead is not increased, but there is a scheduling restriction.
  • a resource allocation system for an uplink demodulation reference signal corresponding to the foregoing method including a base station and a terminal, where the base station includes an uplink demodulation reference signal resource configuration module; the terminal includes an uplink signal transmission management module; and an uplink demodulation reference signal a resource configuration module, configured to configure, by using high layer signaling, N resources or parameter sets for transmitting an uplink demodulation reference signal, and indicating the N resources or parameter sets by using K bits in the downlink control information One for the user terminal to send an uplink demodulation reference signal; the uplink signal transmission management module, configured to send an uplink demodulation reference signal by using the resource or parameter set indicated by the K bits, where N and K are both A positive integer.
  • the mobile terminal corresponding to the foregoing method includes an uplink signal transmission management module, and the uplink signal transmission management module is configured to: after receiving the downlink control information, send the uplink demodulation reference signal by using the resource or the parameter set indicated in the downlink control information.
  • the base station configures, by the high layer signaling, N resources or parameter sets for transmitting the uplink DMRS for the user equipment.
  • the N resources or parameter sets for transmitting the uplink DMRS include one or more of the following information: a user-specific parameter for determining an uplink DMRS sequence group number M , and is used to determine an uplink DMRS sequence shift pattern. / ss user-specific parameters, high-level signaling configuration cyclic shift information, cell-specific parameters A ss for determining the DMRS sequence shift pattern of the PUSCH, user-specific for determining the DMRS sequence shift pattern of the PUCCH There are parameters, group hopping enable indication, sequence hopping enable indication, sequence group hopping non-enable indication, orthogonal mask (OCC) enable indication of DMRS, DMRS spatial multiplexing layer, uplink demodulation reference The sequence group number of the signal.
  • a user-specific parameter for determining an uplink DMRS sequence group number M and is used to determine an uplink DMRS sequence shift pattern.
  • / ss user-specific parameters high-level signaling configuration cyclic shift information
  • cell-specific parameters A
  • the base station configures two user-specific parameters for determining the uplink DMRS sequence group number M for the user terminal or configures two user-specific parameters for determining the uplink DMRS sequence shift pattern.
  • the user terminal can thus calculate 2 alternative uplink DMRS sequence group numbers ul and u2.
  • the base station indicates, by using one bit of the downlink control information format 0 or format 4 or format 1A, that the user terminal dynamically selects one sequence group number from the two candidate uplink DMRS sequence group numbers ul, u2 as the final actual use of the user terminal.
  • Upstream DMRS sequence group number is the base station configured to calculate 2 alternative uplink DMRS sequence group numbers ul and u2.
  • the k-bit indication information in the downlink control information includes one or more of the following:
  • the modulation coding mode and the redundancy version indication information corresponding to the transport block, and the PUCCH transmit power control command are enabled.
  • the cyclic shift of the DMRS and the 3-bit information of the OCC index are used to dynamically indicate that the user terminal dynamically selects one sequence group number from the two candidate uplink DMRS sequence group numbers ul, u2 as the final actuality of the user terminal.
  • the 3-bit information indicates 8 states: 000, 001, 010, 011, 100, 101, 110, 111.
  • the four states can be used to indicate the selected sequence group number ul, and the remaining four states represent the selected sequence group number u2. . For example, when the state represented by the 3-bit information is 000 or 001 or 010 or 011, the sequence group number ul is selected; when the state represented by the 3-bit information is 100 or 101 or 110 or 111, the sequence group number u2 is selected.
  • the request information bit of the SRS is used to dynamically instruct the user terminal to dynamically select one sequence group number from the two candidate uplink DMRS sequence group numbers ul, u2 as the uplink DMRS sequence group number finally used by the user terminal. For example, when the status indicated by the SRS request bit in format 0 is 0, ul is selected, and when the status is 1, the u2 is selected; when the status indicated by the SRS request bit in format 4 is 00 or 01, ul is selected, and the status is 10 or 11 Then choose u2.
  • the user terminal dynamically selects one sequence group number from the two candidate uplink DMRS sequence group numbers ul, u2 as the uplink DMRS sequence group number that the user terminal finally uses. For example, if the high 1 bit is 0, then ul is selected, and when the high 1 bit is 1, u2 is selected.
  • the user terminal calculates the uplink DMRS sequence by using the selected sequence group number, and sends DMRS seam
  • the base station configures, by the high layer signaling, N resources or parameter sets for transmitting the uplink DMRS for the user equipment.
  • the N resources or parameter sets for transmitting the uplink DMRS include one or more of the following information: a user-specific parameter for determining an uplink DMRS sequence group number M , and is used to determine an uplink DMRS sequence shift pattern.
  • User-specific parameters cyclic shift information for high-level signaling configuration, cell-specific parameters A ss for determining the DMRS sequence shift pattern of the PUSCH, user-specific parameters for determining the DMRS sequence shift pattern for the PUCCH , group frequency hopping enable indication, sequence frequency hopping enable indication, sequence group hopping non-enable indication, orthogonal mask (OCC) enable indication of DMRS, DMRS spatial multiplexing layer, uplink demodulation reference signal Sequence group number.
  • OCC orthogonal mask
  • the base station configures four user-specific parameters for determining the uplink DMRS sequence group number M or four user-specific parameters for determining the uplink DMRS sequence shift pattern for the user terminal, and the user terminal can calculate four parameters.
  • the base station indicates, by using 2 bits in the downlink control information format 0 or format 4 or format 1A, that the user terminal dynamically selects one sequence group number from the four candidate uplink DMRS sequence group numbers ul, u2, u3, and u4 as the user.
  • the uplink DMRS sequence group number that the terminal eventually uses.
  • the k-bit indication information in the downlink control information includes one or more of the following: 3-bit information indicating a cyclic shift of the DMRS and an OCC index, request information of the SRS, and a higher or upper 2 bits of the resource block allocation information Transmit Power Control command for PUCCH , TPC command for PUCCH ).
  • the 3-bit information indicates 8 states: 000, 001, 010, 011, 100, 101, 110, 111, which can be used.
  • the two states indicate the selection sequence group number ul, the two states indicate the selection sequence group number u2, the two states indicate the selection sequence group number u3, and the two states indicate the selection sequence group number u4.
  • the sequence group number ul is selected; when the state indicated by the 3-bit information is 010 or 011, the sequence group number u2 is selected; when the state represented by the 3-bit information is When 100 or 101, the sequence group number u3 is selected; when the state indicated by the 3-bit information is 110 or 111, the sequence group number u4 is selected.
  • the request information bit of the SRS is used to dynamically instruct the user terminal to dynamically select one sequence group number from the four candidate uplink DMRS sequence group numbers ul, u2, u3, and u4 as the uplink DMRS sequence group finally used by the user terminal. Numbering. For example, when the status indicated by the SRS request bit in format 4 is 00, ul is selected, when the status is 01, u2 is selected, when the status is 10, u3 is selected, and when the status is 11, u4 is selected.
  • the user terminal dynamically selects one sequence group number from the four candidate uplink DMRS sequence group numbers ul, u2, u3, and u4 as the uplink DMRS sequence group number that the user terminal finally uses. For example, when the upper 2 bits are 00, ul is selected, the upper 2 bits are 01, then u2 is selected, the upper 2 bits are 10, then u3 is selected, and when the upper 2 bits are 11, u4 is selected.
  • the user terminal calculates the uplink DMRS sequence using the selected sequence group number, and sends the DMRS.
  • This embodiment provides a method for configuring a DMRS.
  • the method includes that a base station can configure different uplink DMRS sequence group numbers for users with the same cell ID (such as CoMP scenario 4), thereby achieving the purpose of increasing uplink DMRS multiplexing capacity.
  • CoMP scenario 3 or Comp scenario 4 shown in FIG. 7 if the macro base station is the same as the cell ID of the low-power node below the macro base station, it is CoMP scenario 4, and if the cell ID is not the same, it is a CoMP scenario. 3.
  • the uplink DMRS sequence group numbers of the users belonging to the macro base station are the same, and all belong to the uplink DMRS sequence group number of the user under the low power node. The same is true, but the number of users in CoMP scenario 4 is generally large, and it is easy to cause DMRS resource conflicts due to insufficient multiplexing capacity. Question.
  • the base station may configure a plurality of user-specific parameters for determining the uplink DMRS sequence group number M for the user terminal or configure a plurality of user-specific parameters for determining the uplink DMRS sequence shift pattern/ ss .
  • the user terminal can calculate multiple candidate uplinks
  • the DMRS sequence group number the user terminal dynamically selects one sequence group number from the plurality of uplink DMRS sequence group numbers as the uplink DMRS sequence group number actually used by the user terminal according to the downlink control information sent by the base station, when there are a large number of uplink transmission users, different uplink DMRS sequence group numbers can be configured for users with the same cell ID, and dynamically switched from CoMP scenario 4 to CoMP scenario 3, thereby overcoming scheduling restrictions (frequency domain) that must allocate the same time-frequency resources.
  • the resources can be partially overlapped), and the multiplexing capacity of the DMRS is increased.
  • the users configuring the uplink CoMP and the interfering users (for example, UE1 and UE2) occupy the same time-frequency resources and use the same root sequence, so that users can use CS and/or OCC for orthogonality.
  • the base station configures, by the high layer signaling, N resources or parameter sets for transmitting the uplink DMRS for the user equipment.
  • the N resources or parameter sets for transmitting the uplink DMRS include one or more of the following information: virtual cell ID (NID BSI ), offset parameter of the sequence shift pattern (D SS BSI ), cyclic shift Jump initial value ( Cmit GSH ).
  • NID BSI virtual cell ID
  • D SS BSI offset parameter of the sequence shift pattern
  • Cmit GSH cyclic shift Jump initial value
  • the virtual cell ID, the offset parameter of the sequence shift pattern, and the initial value of the cyclic shift jump are user-specific parameters.
  • the base station notifies 2 parameter sets ⁇ NID BSI , D SS BSI , c imt CSH ⁇ , or 2 parameter sets ⁇ NID BSI ,
  • D SS BSI ⁇ or 2 parameter sets ⁇ NID BSI ⁇ , denoted as parameter set 1 and parameter set 2.
  • the base station uses the cyclic shift of the DMRS and the 3-bit information of the OCC index to dynamically instruct the user terminal to dynamically select one parameter set from the two candidate parameter sets 1 and 2, as the final actual use parameter of the user terminal. Thereby determining the final uplink DMRS sequence group number, base sequence number, and cyclic shift jump pattern.
  • the base station uses the cyclic shift of the DMRS and the 3-bit information of the OCC index, or dynamically indicates the user terminal from the 3-bit information indicating the cyclic shift of the demodulation reference signal, the orthogonal mask index, and the uplink DMRS parameter set.
  • Two alternative parameter sets 1 and parameter set 2 dynamically select one parameter set, including one or more of the following mapping tables: Table 2: (0) and uplink of the cyclic shift region of the uplink related DCI format
  • Table 5 (0) and uplink of the cyclic shift region of the uplink related DCI format
  • the user terminal transmits the DMRS by using the selected uplink DMRS sequence group number, base sequence number, and cyclic shift jump pattern.
  • the base station configures, by the high layer signaling, N resources or parameter sets for transmitting the uplink DMRS for the user equipment.
  • the N resources or parameter sets for transmitting the uplink DMRS include one or more of the following information: A base sequence of the uplink demodulation reference signal.
  • the base station notifies the base sequence of the two uplink demodulation reference signals, which are referred to as base sequence 1 and base sequence 2.
  • the base station dynamically instructs the user by using the cyclic shift of the DMRS and the 3-bit information of the OCC index.
  • the terminal dynamically selects one base sequence from the two candidate base sequence 1 and base sequence 2 as the base sequence actually used by the user terminal.
  • the base station uses the cyclic shift of the DMRS and the 3-bit information of the OCC index, or dynamically indicates the user terminal from the 3-bit information indicating the cyclic shift of the demodulation reference signal, the orthogonal mask index, and the uplink DMRS parameter set.
  • the two alternative base sequence 1 and base sequence 2 dynamically select a base sequence, including one or more of the following mapping tables:
  • the base station configures multiple resources or parameter sets for the user terminal through the high-layer signaling, and dynamically selects multiple resources or one of the parameter sets through the downlink control information, which can save signaling overhead and dynamically configure the inter-cell UE.
  • the DMRS resource or the parameter set enables the DMRS of the UEs in different cells to be orthogonal, overcomes the scheduling limitation, and enhances the multiplexing capacity of the DMRS, so as to avoid that the UEs in different technologies cannot implement orthogonality, existence of scheduling restrictions, and DMRS complex in the related technologies.
  • the problem of insufficient capacity is used, thereby improving the transmission performance of the system.

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

Abstract

L'invention concerne un procédé et un système de configuration de ressources pour un signal de référence de démodulation de liaison montante. Une station de base configure, pour un terminal utilisateur, N ressources ou ensembles de paramètres pour envoyer un signal de référence de démodulation de liaison montante par l'intermédiaire d'une signalisation de couche haute et par l'intermédiaire de K bits dans des informations de commande de liaison descendante, indique l'une des N ressources ou l'un des ensembles de paramètres pour que le terminal utilisateur envoie le signal de référence de démodulation de liaison montante ; et le terminal utilisateur envoie le signal de référence de démodulation de liaison montante en utilisant les ressources ou l'ensemble de paramètres indiqués par les K bits, N et K étant tous deux des entiers positifs. Cette technique permet de réduire le surdébit de signalisation, configure dynamiquement les ressources de signaux de référence de démodulation (DMRS) ou les ensembles de paramètres pour des UE se trouvant parmi des cellules, de manière à mettre en œuvre une orthogonalisation DMRS des UE se trouvant parmi les différentes cellules, à remédier aux limites de la planification, à améliorer la capacité de multiplexage du signal DMRS, à éviter les problèmes liés à l'art antérieur, à savoir que l'orthogonalisation ne pouvait pas être mise en œuvre sur des UE se trouvant parmi des cellules différentes, qu'il existe des limitations de planification et que la capacité de multiplexage du signal DMRS est insuffisante, afin d'améliorer ainsi les performances de transmission du système.
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JP2018537889A (ja) * 2016-01-20 2018-12-20 日本電気株式会社 基準信号を送信する方法
JP2020074611A (ja) * 2016-01-20 2020-05-14 日本電気株式会社 基地局により実施される方法、ユーザ機器により実施される方法、基地局、及びユーザ機器
CN108112065A (zh) * 2017-05-05 2018-06-01 中兴通讯股份有限公司 发送功率的确定、信令配置方法及装置、终端、基站
CN108112065B (zh) * 2017-05-05 2023-09-26 中兴通讯股份有限公司 发送功率的确定、信令配置方法及装置、终端、基站
WO2019174568A1 (fr) * 2018-03-13 2019-09-19 Qualcomm Incorporated Techniques de sélection de séquences pour un accès multiple non orthogonal (noma)
CN112106421A (zh) * 2018-03-13 2020-12-18 高通股份有限公司 用于非正交多址（noma）的序列选择技术
US11917657B2 (en) 2018-03-13 2024-02-27 Qualcomm Incorporated Sequence selection techniques for Non-Orthogonal Multiple Access (NOMA)
CN112106421B (zh) * 2018-03-13 2024-05-14 高通股份有限公司 用于非正交多址（noma）的序列选择技术

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