WO2021047647A1 - 上行传输方法和装置 - Google Patents

上行传输方法和装置 Download PDF

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Publication number
WO2021047647A1
WO2021047647A1 PCT/CN2020/114826 CN2020114826W WO2021047647A1 WO 2021047647 A1 WO2021047647 A1 WO 2021047647A1 CN 2020114826 W CN2020114826 W CN 2020114826W WO 2021047647 A1 WO2021047647 A1 WO 2021047647A1
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Prior art keywords
subband
uplink
dci
srs resource
uplink transmission
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PCT/CN2020/114826
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English (en)
French (fr)
Inventor
郑国增
吴昊
李永
蒋创新
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ZTE Corp
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ZTE Corp
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Priority to CA3151042A priority Critical patent/CA3151042C/en
Priority to EP20863266.1A priority patent/EP4030669A4/en
Priority to US17/642,494 priority patent/US12132674B2/en
Publication of WO2021047647A1 publication Critical patent/WO2021047647A1/zh
Anticipated expiration legal-status Critical
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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
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • 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
    • H04L5/0058—Allocation criteria
    • H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
    • 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
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0092—Indication of how the channel is divided
    • 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
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • 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
    • H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
    • 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
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • This application relates to a wireless communication network, for example, to an uplink transmission method and device.
  • the uplink transmission rate of the terminal is generally lower than the downlink reception rate due to the limitation of the space size of the terminal, the hardware cost, and the complexity of hardware implementation.
  • the terminal improves the rate and coverage of the uplink transmission channel by using technologies such as power control, precoding, and beam.
  • technologies such as power control, precoding, and beam.
  • broadband precoding is used for uplink transmission, but the channel estimation accuracy of broadband precoding is insufficient, and the performance of improving uplink transmission is limited.
  • the present application provides an uplink transmission method and device, which enable the uplink transmission channel to use the precoding of downlink channel information estimation and indicate the precoding information of subband granularity, which improves the accuracy of channel estimation and is beneficial to the enhancement of uplink transmission.
  • the embodiment of the present application provides an uplink transmission method, which is applied to a first communication node, and includes:
  • the uplink transmission channel is sent according to the scheduling of the downlink control signaling.
  • the uplink reference signal includes N SRS resource groups, and the i-th SRS resource group includes M i SRS resources, where each SRS resource group is associated with a downlink reference signal, i, N, M i is an integer greater than or equal to 1, and 1 ⁇ i ⁇ N.
  • association relationship between SRS resources and PTRS ports includes any of the following methods:
  • All SRS resources are not associated with PTRS ports, and each SRS resource is associated with one PTRS port.
  • using downlink channel information to send an uplink reference signal includes:
  • the uplink reference signal is generated according to the precoding of each uplink subband of the uplink reference signal and the uplink reference signal is sent.
  • the uplink subband division method includes at least one of the following methods:
  • the subband division granularity is indicated by at least one of the following methods: high-level signaling, physical layer signaling, the bandwidth of the carrier component where the uplink transmission channel is located, and the frequency domain range of the BWP where the uplink transmission channel is located , The frequency domain range of SRS resources.
  • the downlink control signaling includes any of the following manners:
  • the DCI of the two joint scheduling uplink transmission channels are the DCI of the two joint scheduling uplink transmission channels.
  • a DCI for scheduling an uplink transmission channel includes a subband SRS resource indicator.
  • the frequency domain ranges indicated by the DCIs of the two independently scheduled uplink transmission channels do not overlap, and the DCIs of the two independently scheduled uplink transmission channels both include subband SRS resource indications.
  • the two DCIs of jointly scheduled uplink transmission channels include a first DCI and a second DCI, and the first DCI and the second DCI jointly schedule the uplink transmission channel.
  • the first DCI includes at least one of the following information: carrier indication, BWP indication, frequency domain resource allocation, time domain resource allocation, frequency hopping indication, frequency hopping offset indication, modulation and coding mode, Redundancy version, process number, SRS resource indication, SRS resource group indication, transmission layer number indication, DMRS port indication, DMRS sequence initialization indication, and size indication of the second DCI;
  • the second DCI includes at least one of the following information: uplink subband number, multiple subband SRS resource indication, modulation and coding scheme, redundancy version, redundancy version offset, DMRS sequence initialization indication, DMRS sequence initialization offset indication .
  • the information bit size of the second DCI is determined by at least one of the following methods: the size indication of the second DCI of the first DCI, the association relationship between SRS resources and PTRS ports, the number of SRS resource groups, The number of SRS resources included in each SRS resource group, the selection of SRS resource groups, the number of SRS resources included in each uplink subband, the frequency hopping indicator of the first DCI, the frequency hopping offset indicator of the first DCI, the first SRS resource indication of a DCI and frequency domain resource allocation of the first DCI.
  • the number of SRS resources included in each uplink subband is the number of SRS resources existing in the frequency domain occupied by the corresponding uplink subband; the number of SRS resources included in each uplink subband is the same as the number of SRS resources included in each uplink subband.
  • the relationship between the total number of SRS resources includes at least one of the following methods:
  • Different SRS resources occupy different frequency domains, and the uplink subband division method is used to ensure that the number of SRS resources included in each uplink subband is the same as the total number of SRS resources;
  • the number of included SRS resources is less than the number of uplink subbands of the total number of SRS resources, and the frequency domain range to which the uplink subband belongs cannot be used for scheduling uplink transmission channels;
  • the uplink subbands that include the number of SRS resources less than the total number of SRS resources are used for scheduling the uplink transmission channel and there is a corresponding subband SRS resource indication.
  • the uplink subband number is determined by at least one of the following information: the division mode of the uplink subband, the frequency hopping indicator of the first DCI, the frequency hopping offset indicator of the first DCI, the first DCI Frequency domain resource allocation.
  • the bit width indicated by the SRS resource of each subband is determined by at least one of the following information: the association relationship between the SRS resource and the PTRS port, the number of SRS resource groups, and the SRS resources contained in each SRS resource group The number, the selection of the SRS resource group, the SRS resource indication of the first DCI, and the number of SRS resources included in each uplink subband.
  • the relationship between the uplink subband number of the second DCI and multiple subband SRS resource indications includes at least one of the following manners:
  • the second DCI includes multiple subband SRS resource indicators, and does not include an uplink subband number;
  • the second DCI includes an uplink subband number and multiple subband SRS resource indicators, where one uplink subband number corresponds to one subband SRS resource indicator;
  • the second DCI includes an uplink subband number and multiple subband SRS resource indications, where a group of uplink subband numbers corresponds to one subband SRS resource indication.
  • the prompt information of the first DCI includes at least one of the following information: the scrambling code of the first DCI, the redundancy version of the first DCI, the SRS resource indication of the first DCI, and the first DCI The SRS resource group indication and the DMRS sequence initialization indication of the first DCI.
  • the layer number of the uplink transmission channel is determined by at least one of the following information: the SRS resource indicator of the first DCI, the transmission layer number indicator of the first DCI, the DMRS port indicator of the first DCI, and the second Multiple sub-band SRS resource indications of DCI.
  • sending the uplink transmission channel according to the scheduling of the downlink control signaling includes:
  • the uplink transmission channel is scheduled according to the first DCI
  • the uplink transmission channel is jointly scheduled according to the first DCI and the second DCI.
  • the second communication node determines that the second DCI is monitored according to at least one of the following manners:
  • the uplink transmission channel adopts the modulation and coding mode indicated by the second DCI
  • the uplink transmission channel adopts the redundancy version indicated by the second DCI
  • the redundancy version of the uplink transmission channel is determined by the redundancy version indicated by the first DCI and the redundancy version offset indicated by the second DCI;
  • the DMRS sequence initialization of the uplink transmission channel adopts the DMRS sequence initialization indication in the second DCI;
  • the DMRS sequence initialization of the uplink transmission channel is determined by the DMRS sequence initialization indicated by the first DCI and the DMRS sequence initialization offset indicated by the second DCI.
  • the subband SRS resource indicator is used to indicate the precoding of the uplink transmission channel.
  • the precoding used by the uplink transmission channel in each uplink subband is determined by the subband SRS resource corresponding to each uplink subband. Instructions are OK.
  • the embodiment of the present application provides an uplink transmission method, which is applied to a second communication node, and includes:
  • using downlink channel information to send an uplink reference signal includes:
  • the uplink reference signal is generated according to the precoding of each uplink subband of the uplink reference signal and the uplink reference signal is sent.
  • the uplink subband division method includes at least one of the following methods:
  • An embodiment of the present application provides an uplink transmission device, including a processor and a memory, and the processor is configured to run program instructions stored in the memory to execute any possible implementation of the above-mentioned uplink transmission method.
  • An embodiment of the present application provides an uplink transmission device, which is set at a first communication node, and includes:
  • the reference signal receiving module is configured to receive the downlink reference signal sent by the second communication node, and obtain downlink channel information
  • the reference signal sending module is configured to use the downlink channel information to send the uplink reference signal
  • a monitoring module configured to monitor the downlink control signaling sent by the second communication node, the downlink control signaling includes a subband SRS resource indication;
  • the channel sending module is configured to send the uplink transmission channel according to the scheduling of the downlink control signaling.
  • An embodiment of the present application provides an uplink transmission device, which is set at a second communication node, and includes:
  • the reference signal sending module is configured to send a downlink reference signal to the first communication node, where the downlink reference signal is used to obtain downlink channel information;
  • a reference signal receiving module configured to receive an uplink reference signal sent by the first communication node using downlink channel information
  • a signaling sending module configured to send downlink control signaling to the first communication node, where the downlink control signaling includes a subband SRS resource indication;
  • the channel receiving module is configured to receive the uplink transmission channel sent by the first communication node according to the scheduling of the downlink control signaling.
  • An embodiment of the present application provides an uplink transmission system, where the uplink transmission system includes a first communication node and a second communication node;
  • the first communication node includes any kind of uplink transmission device arranged in the first communication node;
  • the second communication node includes any kind of uplink transmission device arranged in the second communication node.
  • FIG. 1 is a flowchart of an uplink transmission method provided by an embodiment
  • Figure 2 is a schematic diagram of SRS resources for uplink reference signals
  • Fig. 3 is a schematic diagram of subband division of SRS resources
  • Figure 4 is a schematic diagram of the selection of SRS resource groups
  • FIG. 5 is a schematic diagram of the frequency domain range of the uplink transmission channel scheduled by the first DCI
  • FIG. 6 is a schematic diagram of the frequency domain range of the uplink transmission channel scheduled by the first DCI when there is frequency hopping;
  • FIG. 7 is a flowchart of another uplink transmission method provided by an embodiment
  • FIG. 8 is a schematic structural diagram of an uplink transmission device provided by an embodiment
  • FIG. 9 is a schematic structural diagram of another uplink transmission apparatus according to an embodiment.
  • FIG. 10 is a schematic structural diagram of an uplink transmission system provided by an embodiment
  • FIG. 11 is a schematic structural diagram of a terminal provided by an embodiment
  • Fig. 12 is a schematic structural diagram of a base station provided by an embodiment.
  • the estimation of the downlink channel can be used to reciprocate to the uplink transmission, reducing the overhead and increasing the accuracy of precoding.
  • the uplink channel and the downlink channel have reciprocity, how to select the subband precoding for the uplink transmission channel is a problem to be solved urgently.
  • Fig. 1 is a flowchart of an uplink transmission method provided in an embodiment. As shown in Fig. 1, the method provided in this embodiment includes the following steps.
  • Step S1010 Receive a downlink reference signal sent by the second communication node, and obtain downlink channel information.
  • the uplink transmission method provided in this embodiment is applied to a first communication node in a wireless communication system, and the first communication node is, for example, User Equipment (UE).
  • the UE uses the uplink transmission channel for uplink transmission in the wireless communication system.
  • the base station sends downlink data and downlink signaling to the UE through the downlink transmission channel.
  • the uplink channel and the downlink channel between the base station and the UE are reciprocal, that is, the uplink channel and the downlink channel between the base station and the UE experience the same spatial environment, the UE can use the downlink channel obtained by the base station sending the downlink reference signal The information is sent to the uplink transmission channel.
  • the traditional uplink transmission channel uses wideband precoding, but the precision of the wideband precoding is insufficient, and the performance of improving the uplink transmission is limited.
  • this embodiment considers applying the precoding information calculated by using the downlink channel information to the uplink transmission channel.
  • the UE as the first communication node needs to receive the downlink reference signal sent by the base station as the second communication node, and obtain downlink channel information from the downlink reference signal.
  • Step S1020 Use the downlink channel information to send the uplink reference signal.
  • the first communication node After acquiring the downlink channel information, the first communication node calculates the precoding information of the uplink transmission channel based on the downlink channel information, and buffers the precoding information.
  • the precoding is selected from the buffered precoding information to generate the uplink reference signal, and the precoding selection information is buffered.
  • Using the downlink channel information to send the uplink reference signal includes: determining the precoding of each uplink subband of the uplink reference signal according to the downlink channel information; generating the uplink reference signal according to the precoding of each uplink subband of the uplink reference signal and sending the uplink reference signal.
  • the uplink reference signal includes N Sounding Reference Signal (SRS) resource groups, and N is an integer greater than or equal to 1.
  • SRS Sounding Reference Signal
  • the i-th SRS resource groups comprises one SRS resource M i, M i is an integer greater than or equal to 1.
  • SRS resources from different SRS resource groups can be sent at the same time.
  • SRS resources from different SRS resource groups may have the same time domain behavior, such as periodic, semi-continuous or aperiodic transmission.
  • Each SRS resource group is associated with a downlink reference signal, and the downlink reference signal is used to obtain downlink channel information.
  • the first communication node uses the downlink channel information to send the uplink reference signal, which refers to determining the precoding of each uplink subband of the uplink reference signal according to the downlink channel information, and then generating the uplink reference signal according to the precoding of each uplink subband of the uplink reference signal And send the uplink reference signal.
  • FIG. 2 is a schematic SRS resources for the uplink reference signal, the presence of the i-th and i + 1-th SRS resource groups, each group respectively comprising SRS resource M i and M i + 1 th SRS resource and each The frequency domain range occupied by SRS resources is shown in the figure.
  • w (k, i, j) represent the precoding of the jth SRS resource of the ith SRS resource group in the kth uplink subband.
  • w (k, i, j) is calculated by the UE according to the downlink channel information obtained by the downlink reference signal associated with the i-th SRS resource group.
  • the association relationship between SRS resources and Phase Tracking Reference Signal (PTRS) ports takes at least one of the following methods: all SRS resources are not associated with a PTRS port, and each SRS resource is associated with a PTRS port. Among them, PTRS is used to track phase noise.
  • Step S1030 Monitor the downlink control signaling sent by the second communication node, where the downlink control signaling includes a subband SRS resource indication.
  • the second communication node After the first communication node sends the uplink reference signal to the second communication node, the second communication node sends downlink control signaling to the first communication node.
  • the downlink control signaling is used to schedule the uplink transmission channel of the first communication node, and the downlink control signal
  • the command includes the sub-band SRS resource indication.
  • the subband SRS resource indicator is used to indicate the subband precoding of the uplink transmission channel.
  • the precoding used by the uplink transmission channel in a certain uplink subband is determined by the subband SRS resource indicator corresponding to the uplink subband.
  • BWP Bandwidth Part
  • the subband division granularity is indicated by one of the following methods: high-level signaling, physical layer signaling, the bandwidth of the carrier component where the uplink transmission channel is located, the frequency domain range of the BWP where the uplink transmission channel is located, and the frequency domain range of the SRS resource.
  • the high-level signaling is, for example, Radio Resource Control (Remote Resource Control, RRC) signaling, or Media Access Control Control Element (MAC CE) signaling
  • the physical layer signaling is, for example, Downlink Control Information (Downlink Control Element, MAC CE) signaling. Control Information, DCI).
  • Figure 3 is a schematic diagram of the subband division of SRS resources.
  • the uplink subband can be divided in one of the following ways:
  • the SRS resource with the largest bandwidth and the subband division granularity (1) According to all SRS resources, the SRS resource with the largest bandwidth and the subband division granularity.
  • the SRS resource with the smallest bandwidth and the subband division granularity According to all SRS resources, the SRS resource with the smallest bandwidth and the subband division granularity.
  • the manner in which the downlink control signaling schedules the uplink transmission channel includes any of the following methods:
  • the two jointly schedule the DCI of the uplink transmission channel.
  • Step S1040 Send the uplink transmission channel according to the scheduling of the downlink control signaling.
  • the first communication node After the first communication node monitors the downlink control signaling, it can send the uplink transmission channel according to the scheduling of the downlink control signaling. Since the downlink control signaling includes the subband SRS resource indicator, the first communication node can determine the precoding of the uplink transmission channel to be transmitted according to the subband SRS resource indicator in the downlink control signaling, and send the uplink transmission channel.
  • the uplink transmission method provided in this embodiment is applied to the first communication node. After receiving the downlink reference signal sent by the second communication node, the downlink channel information is obtained, and then the downlink channel information is used to send the uplink reference signal.
  • the downlink control signaling includes the subband SRS resource indicator, and the uplink transmission channel is sent according to the scheduling of the downlink control signaling, so that the uplink transmission channel can be used when there is reciprocity between the uplink transmission channel and the downlink transmission channel.
  • the downlink channel information calculates the precoding information, which improves the accuracy of channel estimation, which is conducive to the enhancement of uplink transmission.
  • the downlink control signaling scheduling uplink transmission channel includes a DCI for scheduling an uplink transmission channel, and a DCI for scheduling the uplink transmission channel includes a subband SRS resource indicator.
  • the downlink control signaling includes at least one of the following information: carrier indication, BWP indication, frequency domain resource allocation, time domain resource allocation, frequency hopping indication, frequency hopping offset indication, modulation and coding method, redundancy version , Process number, multiple subband SRS resource indicator, broadband SRS resource indicator, transmission layer number indicator, SRS resource group indicator, demodulation reference signal (DeModulation Reference Signal, DMRS) port indicator, DMRS sequence initialization indicator.
  • the multiple subband SRS resource indications are used to indicate the precoding of the uplink transmission channel.
  • the precoding used by the uplink transmission channel in a certain uplink subband is determined by the subband SRS resource indication corresponding to the uplink subband.
  • the method for implementing the downlink control signaling including one DCI may be the same as the method for implementing the downlink control signaling including the DCI of two jointly scheduled uplink transmission channels.
  • the downlink control signaling scheduling uplink transmission channel includes two DCIs for independently scheduling uplink transmission channels, the frequency domain ranges indicated by the DCIs of the two independently scheduling uplink transmission channels do not overlap, and the two independently scheduling uplink transmission channels All DCIs include sub-band SRS resource indications.
  • each downlink control signaling includes at least one of the following information: carrier indication, BWP indication, frequency domain resource allocation, time domain resource allocation, frequency hopping indication, frequency hopping offset indication, modulation and coding method, redundancy Remaining version, process number, multiple subband SRS resource indicator, broadband SRS resource indicator, transmission layer number indicator, SRS resource group indicator, DMRS port indicator, DMRS sequence initialization indicator.
  • the multiple subband SRS resource indicators are used to indicate the precoding of the uplink transmission channel.
  • the precoding used by the uplink transmission channel in a certain uplink subband is determined by the subband SRS resource indicator corresponding to the uplink subband.
  • the implementation method of the downlink control signaling including the DCI of two independently scheduled uplink transmission channels may be the same as the implementation method of the downlink control signaling including the DCI of two jointly scheduled uplink transmission channels.
  • the downlink control signaling scheduling uplink transmission channel includes two DCIs for jointly scheduling the uplink transmission channel.
  • the DCI of the two jointly scheduled uplink transmission channels includes the first DCI and the second DCI, and the first DCI and the second DCI jointly schedule the uplink transmission channels.
  • the first DCI includes at least one of the following information: carrier indication, BWP indication, frequency domain resource allocation, time domain resource allocation, frequency hopping indication, frequency hopping offset indication, modulation and coding method, redundancy version, process number, SRS resource Indications, SRS resource group indication, transmission layer number indication, DMRS port indication, DMRS sequence initialization indication, and size indication of the second DCI.
  • the second DCI includes at least one of the following information: uplink subband number, multiple subband SRS resource indication, modulation and coding scheme, redundancy version, redundancy version offset, DMRS sequence initialization indication, DMRS sequence initialization offset indication .
  • DMRS is used for demodulation of uplink transmission channel.
  • the first communication node determines whether the second DCI exists in at least one of the following ways: RRC signaling configured by the base station, MAC CE signaling configured by the base station, and prompt information of the first DCI.
  • the prompt information of the first DCI includes at least one of the following methods: scrambling code of the first DCI, redundancy version of the first DCI, SRS resource indication of the first DCI, SRS resource group indication of the first DCI, and DMRS sequence initialization indication.
  • the scrambling code of the first DCI such as the Radio Network Temporary Identifier (RNTI) of the first DCI, refers to the use of specific cyclic redundancy check (CRC) check bits of the first DCI
  • the RNTI performs scrambling to notify the terminal whether there is a second DCI.
  • the DMRS sequence initialization indication of the first DCI refers to that the base station informs the terminal whether there is a second DCI through the DMRS sequence initialization indication.
  • the information bit size of the second DCI is determined by at least one of the following methods: the size indication of the second DCI in the first DCI, the association relationship between SRS resources and PTRS ports, the number of SRS resource groups, and the SRS contained in each SRS resource group The number of resources, the selection of SRS resource groups, the number of SRS resources included in each uplink subband, the frequency hopping indicator of the first DCI, the frequency hopping offset indicator of the first DCI, the SRS resource indicator of the first DCI, the first A frequency domain resource allocation of DCI.
  • the bit width indicated by the SRS resource of each subband is determined by at least one of the following information: the association relationship between the SRS resource and the PTRS port, the number of SRS resource groups, the number of SRS resources contained in each SRS resource group, and the SRS resource group The selection of, the SRS resource indication of the first DCI, and the number of SRS resources contained in each uplink subband.
  • the number of layers of the uplink transmission channel is determined by at least one of the following information: SRS resource indication of the first DCI, transmission layer number indication of the first DCI, DMRS port indication of the first DCI, and multiple subband SRS resource indications of the second DCI.
  • the uplink subband number is determined by at least one of the following information: the division mode of the uplink subband, the frequency hopping indicator of the first DCI, the frequency hopping offset indicator of the first DCI, and the frequency domain resource allocation of the first DCI.
  • the relationship between the uplink subband number of the second DCI and the multiple subband SRS resource indications can be in at least one of the following ways:
  • the second DCI does not include the uplink subband number, but only includes multiple subband SRS resource indications;
  • the second DCI includes an uplink subband number and multiple subband SRS resource indicators, where one uplink subband number corresponds to one subband SRS resource indicator;
  • the second DCI includes an uplink subband number and multiple subband SRS resource indications, where a group of uplink subband numbers corresponds to one subband SRS resource indication.
  • the subband SRS resource indicator is used to indicate the precoding of the uplink transmission channel.
  • the precoding used by the uplink transmission channel in a certain uplink subband is determined by the subband SRS resource indicator corresponding to the uplink subband.
  • the number of SRS resources included in each uplink subband refers to the number of SRS resources in the frequency domain occupied by the uplink subband, and is related to the selection of the SRS resource group.
  • the relationship between the number of SRS resources included in each uplink subband and the total number of SRS resources will affect the SRS resource indication of the first DCI and the subband SRS resource indication of the second DCI.
  • the total number of SRS resources is determined by at least one of the following methods: the total number of SRS resources included in all SRS resource groups; related to the selection of the SRS resource group, indicating the total number of SRS resources included in the selected SRS resource group number.
  • Figure 4 is a schematic diagram of the selection of SRS resource groups.
  • the first SRS resource group contains 3 SRS resources
  • the second SRS resource group contains 4 SRS resources. If the first SRS resource group is selected, the total number of SRS resources is 3, and the number of SRS resources contained in the k+1 uplink subband is 2; if the second SRS resource group is selected, the total SRS resources are The number of SRS resources is 4, and the number of SRS resources contained in the k+1th uplink subband is 3. If the first SRS resource group and the second SRS resource group are selected, the total number of SRS resources is 7. The number of SRS resources included in the +1 uplink subband is 5.
  • the number of SRS resources included in each uplink subband is the number of SRS resources existing in the frequency domain occupied by the corresponding uplink subband.
  • the relationship between the number of SRS resources included in each uplink subband and the total number of SRS resources can be Use one of the following restrictions:
  • the number of SRS resources contained in each uplink subband is the same as the total number of SRS resources; the frequency domain occupied by different SRS resources may be different, and the uplink subbands are divided in a way to ensure that each The number of SRS resources included in each uplink subband is the same as the total number of SRS resources; the number of SRS resources included is less than the number of uplink subbands of the total number of SRS resources, and cannot be used to schedule the uplink transmission channel; the number of SRS resources included is less than The uplink subband with the total number of SRS resources, and the uplink subband does not have a corresponding subband SRS resource indicator; the uplink subband with the number of SRS resources included is less than the total number of SRS resources, and the uplink subband can be used for scheduling uplink Transmission channel and there is a corresponding subband SRS resource indication.
  • the uplink transmission channel uses the information indicated by the first DCI; there is a second DCI and the first communication node detects the second DCI , The uplink transmission channel uses the information indicated by two DCIs jointly.
  • the first communication node confirms that both DCIs are successfully monitored by the first communication node by at least one of the following methods:
  • the uplink transmission channel adopts the modulation and coding mode indicated by the second DCI; the uplink transmission channel adopts the redundancy version indicated by the second DCI; the redundancy version of the uplink transmission channel is the redundancy version indicated by the first DCI and the redundancy indicated by the second DCI
  • the version offset is determined together; the DMRS sequence initialization of the uplink transmission channel uses the DMRS sequence initialization indication in the second DCI; the DMRS sequence initialization of the uplink transmission channel is initialized by the DMRS sequence initialization indicated by the first DCI and the DMRS sequence initialization offset indicated by the second DCI
  • the amount of movement is jointly determined.
  • the downlink control signaling includes the DCI of two jointly scheduled uplink transmission channels, and includes the following specific implementation manner.
  • the DCI of the two jointly scheduled uplink transmission channels under different conditions will be described in detail below with specific embodiments.
  • the resource group includes M SRS resources, and all SRS resources are not associated with PTRS ports.
  • M 4
  • the first DCI does not indicate frequency hopping, and part of the frequency domain range of the uplink transmission channel scheduled by it, as shown in the black part of FIG. 5, which is a schematic diagram of the frequency domain range of the uplink transmission channel scheduled by the first DCI.
  • the granularity of one uplink subband is 4 resource blocks (Resource Block, RB).
  • the SRS resource indication of the first DCI may use one of the following methods: bitmap and joint coding.
  • the SRS resource indicator of the first DCI is 1010
  • the number of layers of the uplink transmission channel is determined by the SRS resource indicator of the first DCI, which means that the number of layers of the uplink transmission channel is 2 layers
  • the SRS resource is selected The first SRS resource and the third SRS resource of the group.
  • one of the following methods can be adopted:
  • the second DCI does not include the uplink subband number, but only includes multiple subband SRS resource indications.
  • a certain uplink subband contains at least one RB and is scheduled for uplink transmission, and the uplink subband corresponds to a subband SRS resource indicator.
  • the subband SRS resource indication may adopt one of the following methods: bitmap, joint coding.
  • bitmap A specific example of using a bitmap is that the subband SRS resource indications of the lth uplink subband and the l+1th uplink subband are 0110 and 1001, respectively.
  • the above subband SRS resource indication indicates that in the first uplink subband of the first layer of the uplink transmission channel, the precoding used by the scheduled frequency domain resources is based on the precoding used in the corresponding uplink subband when the second SRS resource is transmitted. ; In the first uplink subband of the second layer of the uplink transmission channel, the precoding used for the scheduled frequency domain resources is based on the precoding used in the corresponding uplink subband when the third SRS resource is transmitted; the first layer of the uplink transmission channel In the 1+1th uplink subband of the uplink transmission channel, the precoding used by the scheduled frequency domain resources is based on the precoding used in the corresponding uplink subband when the first SRS resource is transmitted; the first 1+1 of the uplink transmission channel layer 2 Within each uplink subband, the precoding used by the scheduled frequency domain resources is based on the precoding used in the corresponding uplink subband when the fourth SRS resource is transmitted.
  • Another implementation manner is that at least one RB is used for part of the uplink subband of the uplink transmission channel, which can correspond to the SRS resource indicator of the same subband, thereby reducing the overhead of the second DCI.
  • a specific example is, as shown in Figure 5, the S-1 uplink sub with 3 RBs are scheduled, the S uplink sub with 1 RB is scheduled, and 4 RBs are continuous.
  • the overhead of DCI, the Sth uplink subband and the S-1th uplink subband correspond to the same subband SRS resource indicator.
  • At least one RB is used for some uplink subbands of the uplink transmission channel, and may not correspond to any subband SRS resource indication. At this time, these uplink subbands use the SRS resource indication in the first DCI by default, reducing the second DCI. s expenses.
  • the second DCI includes an uplink subband number and multiple subband SRS resource indications, where one uplink subband number corresponds to one subband SRS resource indication.
  • the uplink subband number is determined by the division method of the uplink subband and the frequency domain range of the uplink transmission channel. A specific example is, as shown in Figure 5, the 1+1th uplink subband and the S-1th uplink subband The band containing at least one RB is indicated for the uplink transmission channel. Renumber these two uplink subbands as p and q respectively.
  • the subband SRS resource indication may adopt one of the following methods: bitmap and joint coding. A specific example of using a bitmap is that the subband SRS resource indicators numbered p and q are 0110 and 1001, respectively.
  • the above subband SRS resource indication indicates that in the subband numbered p of the first layer of the uplink transmission channel, the precoding used for the scheduled frequency domain resources is based on the precoding used in the corresponding uplink subband when the second SRS resource is transmitted ;
  • the precoding used by the scheduled frequency domain resources is based on the precoding used in the corresponding uplink subband when the third SRS resource is transmitted;
  • the first layer number of the uplink transmission channel In the subband of q the precoding used by the scheduled frequency domain resources is based on the precoding used in the corresponding uplink subband when the first SRS resource is transmitted; in the subband numbered q on the second layer of the uplink transmission channel, it is
  • the precoding used for the scheduled frequency domain resources is based on the precoding used in the corresponding uplink subband when the fourth SRS resource is transmitted.
  • Another implementation manner is that at least one RB is used for part of the uplink subbands of the uplink transmission channel, which can correspond to the same uplink subband number, thereby reducing the overhead of the second DCI.
  • a specific example is, as shown in Figure 5, the S-1 uplink sub with 3 RBs are scheduled, the S uplink sub with 1 RB is scheduled, and 4 RBs are continuous.
  • the Sth uplink subband and the S-1th uplink subband correspond to the same uplink subband number.
  • the SRS resource indicator in the first DCI is used by default to reduce the overhead of the second DCI. .
  • the second DCI includes an uplink subband number and multiple subband SRS resource indications, where one group of uplink subband numbers corresponds to one subband SRS resource indication.
  • the uplink subband number is determined by the uplink subband division method and the frequency domain range of the uplink transmission channel. As shown in FIG. 5, the 1+1th uplink subband and the S-1th uplink subband contain at least one RB which is indicated for the uplink transmission channel. Renumber these two uplink subbands as p and q respectively.
  • the subband SRS resource indication may adopt one of the following methods: bitmap and joint coding. A group of uplink subband numbers corresponds to a subband SRS resource indicator.
  • the uplink subbands numbered p and q correspond to the same subband SRS resource indicator: 0101.
  • the foregoing subband SRS resource indication indicates that in the subband with the uplink transmission channel number p, the precoding used by the frequency domain resources scheduled at the first layer is based on the precoding used in the corresponding uplink subband when the second SRS resource is transmitted; In the subband with the uplink transmission channel number p, the precoding used by the frequency domain resources scheduled at the second layer is based on the precoding used in the corresponding uplink subband when the fourth SRS resource is transmitted; the subband with the uplink transmission channel number q In-band, the precoding used for the frequency domain resources scheduled in the first layer is based on the precoding used in the corresponding uplink subband when the second SRS resource is transmitted; in the subband with the uplink transmission channel number q, the second layer is scheduled The precoding used for the frequency domain resources of is based on the precoding used in the corresponding uplink subband when the fourth SRS resource
  • At least one RB is used for part of the uplink subbands of the uplink transmission channel, and multiple uplink subbands may correspond to the same uplink subband number, thereby reducing the overhead of the second DCI.
  • a specific example is, as shown in Figure 5, the S-1 uplink sub with 3 RBs are scheduled, the S uplink sub with 1 RB is scheduled, and 4 RBs are continuous.
  • the Sth uplink subband and the S-1th uplink subband correspond to the same uplink subband number.
  • the SRS resource indicator in the first DCI is used by default to reduce the overhead of the second DCI. .
  • an example of determining the number of uplink transmission channel layers Assume that the DMRS port indication of the first DCI selects 3 DMRS ports, and the SRS resource indication of the first DCI is 1000. If there is no second DCI or the second DCI is not monitored, the number of layers of the uplink transmission channel is determined by the SRS resource indication of the first DCI, which is layer 1, and the first SRS resource of the SRS resource group is selected.
  • the DMRS port used by the uplink transmission channel is one of the DMRS ports indicated by the DMRS port in the first DCI.
  • the number of layers of the uplink transmission channel can be determined by one of the following methods: the number of DMRS ports indicated by the first DMRS port; and the multiple subband SRS resource indications of the second DCI.
  • the number of DMRS ports indicated by the first DMRS port determines the number of layers of the uplink transmission channel. In the above example, the number of transmission layers is 3, and each subband SRS resource indicator of the second DCI must indicate 3 SRS resources, and the uplink transmission channel is used
  • the DMRS ports are all DMRS ports indicated by the DMRS port in the first DCI.
  • the multiple subband SRS resource indicators of the second DCI determine the number of layers of the uplink transmission channel.
  • each subband SRS resource indicator of the second DCI indicates 2 SRS resources, which means that the number of layers of the uplink transmission channel is 2, and the uplink transmission
  • the DMRS ports of each layer of the channel respectively correspond to two of the DMRS ports indicated by the DMRS port in the first DCI.
  • each SRS resource is associated with one PTRS port.
  • the PTRS ports associated with different uplink subbands on the same layer of the uplink transmission channel must be the same.
  • the selection of the PTRS port of the uplink transmission channel can be determined by one of the following methods: the SRS resource indicator of the first DCI, the SRS resource indicator of the first DCI and the second subband SRS resource indicator are jointly determined, and the subband SRS resource of the second DCI Instructions are OK.
  • the selection of the uplink transmission PTRS port is determined by the SRS resource indication of the first DCI. For example: Suppose there are 4 SRS resources in an SRS resource group, the first and second SRS resources are associated with PTRS port 0, the third and fourth SRS resources are associated with PTRS port 1, and the number of uplink transmission channels is determined by the first level of DCI
  • the SRS resource indication is OK. Examples are as follows:
  • each subband SRS resource indication can only select one from the first and second SRS resources. At this time, the bit width indicated by each subband SRS resource in the second DCI only needs 1 bit.
  • the SRS resource indication of the first DCI is 0011
  • the first layer and the second layer of the uplink transmission channel are associated with the same PTRS port 1. Because the PTRS ports associated with different uplink subbands of the same layer of the uplink transmission channel must be the same, there is no second DCI at this time.
  • the SRS resource indication of the first DCI is 0110
  • the first layer and the second layer of the uplink transmission channel are respectively associated with PTRS port 0 and PTRS port 1.
  • the subband SRS resource indication is used for uplink transmission.
  • the subband SRS resource indication for the first layer can only be selected from the first SRS resource and the second SRS resource; it is used for uplink transmission.
  • the layer 2 subband SRS resource indication can only select one from the third SRS resource and the fourth SRS resource.
  • the bit width indicated by each subband SRS resource in the second DCI only needs to be 2 bits.
  • the SRS resource indication of the first DCI is 1110
  • the first layer and the second layer of the uplink transmission channel are associated with the same PTRS port 0, and the third layer is associated with the PTRS port 1.
  • the bit width indicated by each subband SRS resource in the second DCI only needs 1 bit.
  • the selection of the PTRS port for uplink transmission is determined by the SRS resource indication in the first DCI and the subband SRS resource indication in the second DCI.
  • a specific example is: suppose there are 4 SRS resources in an SRS resource group, the first and second One SRS resource is associated with PTRS port 0, the third and fourth SRS resources are associated with PTRS port 1, and the number of layers of the uplink transmission channel is determined by the SRS resource indication of the first DCI. Examples are as follows:
  • each subband SRS resource indication of the second DCI can only indicate one SRS resource.
  • one of the following methods can be selected: all subband SRS resource indications can only be selected from the first and second SRS resources, and all subband SRS resource indications can only be selected from the third and fourth SRS resources.
  • the SRS resource indicator of the subband with the lowest uplink subband number is 0100, which means that the layer 1 of the uplink transmission channel is associated with PTRS port 0, and the SRS resource indicator of all other subbands can only be from the 1st and 2nd.
  • each subband SRS resource indication of the second DCI can only indicate 2 SRS resources.
  • 2 SRS resources can be arbitrarily selected from the 4 SRS resources, but it needs to satisfy that the PTRS ports associated with different uplink subbands on the same layer of the uplink transmission channel must be the same.
  • each subband SRS resource indication of the second DCI can only indicate 3 SRS resources.
  • Each subband SRS resource indication can select 3 SRS resources arbitrarily from the 4 SRS resources, but it needs to satisfy that the PTRS ports associated with different uplink subbands on the same layer of the uplink transmission channel must be the same.
  • the SRS resource indicator of the first DCI is 1111, it indicates that the number of layers of the uplink transmission channel is 4. At this time, there is no second DCI.
  • N SRS resource groups wherein the i-th group comprising SRS resource M i th SRS resources.
  • the subband SRS resource indication of the second DCI may adopt one of the following restrictions:
  • the number of SRS resources selected in the same resource group for multiple subband SRS resource indications must be the same; the number of SRS resources selected for multiple subband SRS resource indications in the same resource group can be different.
  • the selection of SRS resource group can be determined by one of the following methods:
  • the SRS resource indication of the first DCI implicitly informs the selection of the SRS resource group.
  • One of the following situations can be adopted:
  • the bit width indicated by the SRS resource of the first DCI is Among them, L max represents the maximum number of layers that the terminal can support or the maximum number of transmission layers that the base station allows the terminal. Assuming that the first DCI indicates RI SRS resources, the bit width indicated by one subband SRS resource of the second DCI is one of the following methods:
  • bit width indicated by the SRS resource of the first DCI is one of the following methods:
  • L max represents the maximum number of layers that the terminal can support or the maximum number of transmission layers that the base station allows the terminal.
  • SRS resource groups can be selected. It is assumed that P (P ⁇ N) SRS resource groups are selected, which correspond to the Q 1 , Q 2 , K, and Q Pth SRS resource groups respectively.
  • the bit width indicated by the SRS resource of the first DCI is one of the following methods:
  • L max represents the maximum number of layers that the terminal can support or the maximum number of transmission layers that the base station allows the terminal.
  • the first DCI implicitly informs the selection of the SRS resource group through the SRS resource indication, which refers to determining whether the SRS resource group is selected according to whether the SRS resource indication of the first DCI indicates at least one SRS resource in a certain SRS resource group .
  • the bit width indicated by the SRS resource of the first DCI may be one of the following methods:
  • L max represents the maximum number of layers that the terminal can support or the maximum number of transmission layers that the base station allows the terminal.
  • the first DCI indicates a total of RI SRS resources
  • the second DCI indicates one subband SRS resource
  • the bit width is one of the following methods:
  • N SRS resource groups there are N SRS resource groups, and the SRS resources are associated with PTRS ports.
  • the association relationship between the SRS resource and the PTRS port will affect the SRS resource indication for each subband of the second DCI.
  • the subband SRS resource indication of the second DCI has the following limitation: the PTRS ports associated with different uplink subbands on the same layer of the uplink transmission channel must be the same. There are two situations in the association relationship between SRS resources and PTRS ports in a resource group:
  • Different SRS resources of an SRS resource group may be associated with different PTRS ports
  • All SRS resources of an SRS resource group can only be associated with the same PTRS port.
  • the sub-band SRS resource indication of the second DCI may use one of the following methods to indicate the selection of SRS resources in different SRS resource groups:
  • Multiple subband SRS resources indicate that the number of SRS resources selected in the same resource group must be the same;
  • the multiple subband SRS resource indications can be different in the number of SRS resources selected in the same resource group.
  • Different SRS resources of one SRS resource group may be associated with different PTRS ports, and multiple subband SRS resources indicate that the number of SRS resources selected in the same resource group must be the same.
  • a specific example is to assume that there are two SRS resource groups, and the PTRS port selection of the uplink transmission channel and the number of layers of the uplink transmission channel are determined by the SRS resource indication of the first DCI.
  • the PTRS ports associated with different uplink subbands on the same layer of the uplink transmission channel must be the same.
  • Each SRS resource group contains 4 SRS resources.
  • the first and second SRS resources of the first SRS resource group are associated with PTRS port 0; the third and fourth SRS resources of the first SRS resource group are associated with PTRS port 1; the first and second SRS resources of the second SRS resource group are associated with PTRS port 0 SRS resources are associated with PTRS port 2; the third and fourth SRS resources of the second SRS resource group are associated with PTRS port 3.
  • the SRS resource indication of the first DCI and the subband SRS resource indication of the second DCI for example:
  • the SRS resource indication of the first DCI is: 10000001, indicating that the number of layers of the uplink transmission channel is 2, the first layer of uplink transmission is associated with PTRS port 0, and the second layer of uplink transmission is associated with PTRS port 3. Because the PTRS ports associated with different uplink subbands on the same layer of the uplink transmission channel must be the same. Therefore, the subband SRS resource indication of the first layer can only be selected from the first and second SRS resources of the first SRS resource group; the subband SRS resource indication of the second layer can only be selected from the second SRS resource group. Select one of the 3rd and 4th SRS resources in the resource group. In this case, the bit width indicated by each subband SRS resource only needs 2 bits.
  • the SRS resource indication of the first DCI is: 11001001, indicating that the number of layers of the uplink transmission channel is 4, the first and second layers of uplink transmission are associated with PTRS port 0, the third layer of uplink transmission is associated with PTRS port 2, and the fourth layer of uplink transmission Associated with PTRS port 3. Because the PTRS ports associated with different uplink subbands on the same layer of the uplink transmission channel must be the same. Therefore, the subband SRS no longer includes the selection of the first SRS resource group; the subband SRS resource indicator of the third layer can be selected from the first and second SRS resources of the second SRS resource group; the fourth layer The sub-band SRS resource indication of SRS can be selected from the third and fourth SRS resources of the second SRS resource group. In this case, the bit width indicated by each subband SRS resource only needs 2 bits.
  • the SRS resource indication of the first DCI is: 11111111, which means that the number of layers of the uplink transmission channel is 8. If all SRS resources are selected, there is no second DCI.
  • the SRS resource indication of the first DCI is: 11000000/00110000, which means that the number of layers of the uplink transmission channel is 2, and the second SRS resource group is not selected. Because the PTRS ports associated with different uplink subbands on the same layer of the uplink transmission channel must be the same. At this time, there is no second DCI.
  • the SRS resource indication of the first DCI is: 00001100/00000011, which means that the number of layers of the uplink transmission channel is 2, and the first SRS resource group is not selected. Because the PTRS ports associated with different uplink subbands on the same layer of the uplink transmission channel must be the same. At this time, there is no second DCI.
  • the SRS resource indication of the first DCI is: 11100000, which means that the number of layers of the uplink transmission channel is 3, and the second SRS resource group is not selected. Because the PTRS ports associated with different uplink subbands on the same layer of the uplink transmission channel must be the same. For the subband SRS resource indication of the third layer, only one of the third and fourth SRS resources of the first SRS resource group can be selected. At this time, only 1 bit is required for each subband SRS resource indicator.
  • the SRS resource indication of the first DCI is: 11110000/11001100/11000011/00111100/00110011/00001111, indicating that the number of layers of the uplink transmission channel is 4, because each subband SRS resource indication of the second DCI corresponds to the uplink transmission channel If the SRS resource indications of the same layer are in the same SRS resource group, they must be associated with the same PTRS port. At this time, there is no second DCI.
  • Different SRS resources of an SRS resource group can only be associated with the same PTRS port, and multiple subband SRS resource indications must be the same in the number of SRS resources selected in the same resource group.
  • a specific example is to assume that there are two SRS resource groups, and the PTRS port selection of the uplink transmission channel and the number of layers of the uplink transmission channel are determined by the SRS resource indication of the first DCI.
  • Each SRS resource group contains 4 SRS resources.
  • the PTRS ports associated with different uplink subbands on the same layer of the uplink transmission channel must be the same. All SRS resources of the first SRS resource group are associated with PTRS port 0; all SRS resources of the second SRS resource group are associated with PTRS port 1.
  • the SRS resource indication of the first DCI and the subband SRS resource indication of the second DCI for example:
  • the SRS resource indication of the first DCI is: 10000001, indicating that the number of layers of the uplink transmission channel is 2, the first layer of uplink transmission is associated with PTRS port 0, and the second layer of uplink transmission is associated with PTRS port 1.
  • the subband SRS resource indicator of the first layer only one can be selected from the first SRS resource group; for the subband SRS resource indicator of the second layer, only one can be selected from the second SRS resource group.
  • the SRS resource indication of the first DCI is: 11001001, indicating that the number of layers of the uplink transmission channel is 4, the first and second layers of uplink transmission are associated with PTRS port 0, and the third and fourth layers of uplink transmission are associated with PTRS port 1.
  • the subband SRS resource indications of the first and second layers only 2 can be selected from the first SRS resource group; for the subband SRS resource indications of the 3rd and 4th layers, only 2 can be selected from the second SRS resource group A.
  • the SRS resource indication of the first DCI is: 11111111, which means that the number of layers of the uplink transmission channel is 8. If all SRS resources are selected, there is no second DCI.
  • the SRS resource indication of the first DCI is: 11110000/00001111, which indicates that the number of layers of the uplink transmission channel is 4. There is no second DCI at this time.
  • Different SRS resources of an SRS resource group can only be associated with the same PTRS port, and multiple subband SRS resource indications can be different in the number of SRS resources selected in the same resource group.
  • a specific example is to assume that there are two SRS resource groups, and the PTRS port selection of the uplink transmission channel is determined by the SRS resource indicator in the first DCI and the SRS resource indicator in the second subband.
  • Each SRS resource group contains 4 SRS resources. All SRS resources of the first SRS resource group are associated with PTRS port 0; all SRS resources of the second SRS resource group are associated with PTRS port 1.
  • the SRS resource indication of the first DCI and the subband SRS resource indication of the second DCI for example:
  • the SRS resource indication of the first DCI is: 10000001, which means that the number of layers of the uplink transmission channel is 2.
  • 2 SRS resources can be arbitrarily selected from the 8 SRS resources.
  • the PTRS associated with line transmission depends on the number of transmission layers and the subband SRS resource indication.
  • the SRS resource indication of the first DCI is: 11001001, which indicates that the number of layers of the uplink transmission channel is 4.
  • 4 SRS resources can be arbitrarily selected from the 8 SRS resources.
  • the PTRS associated with line transmission depends on the number of transmission layers and subband SRS resource indication selection.
  • N SRS resource groups wherein the i-th group comprising SRS resource M i th SRS resources, and the first indication DCI hopping and frequency hopping offset.
  • Figure 6 is a schematic diagram of the frequency domain range of the uplink transmission channel scheduled by the first DCI in the presence of frequency hopping.
  • the frequency domain range actually occupied by the uplink transmission channel is determined by the frequency hopping indication of the first DCI and the first DCI.
  • the frequency hopping offset indicator of a DCI and the frequency domain resource allocation of the first DCI are jointly determined.
  • the uplink subband number of the second DCI and multiple subband SRS resource indications should be based on the frequency domain range actually occupied by the uplink transmission channel. For other implementation methods, the same implementation method can be used if there is no conflict with other implementation manners.
  • FIG. 7 is a flowchart of another uplink transmission method provided in an embodiment. As shown in FIG. 7, the method provided in this embodiment includes the following steps.
  • Step S7010 Send a downlink reference signal to the first communication node, where the downlink reference signal is used to obtain downlink channel information.
  • the uplink transmission method provided in this embodiment is applied to a second communication node in a wireless communication system, and the second communication node is, for example, a base station.
  • the base station uses the downlink transmission channel for downlink transmission in the wireless communication system, and schedules the second communication node to send the uplink transmission channel through downlink control signaling.
  • the base station sends downlink data and downlink signaling to the UE through the downlink transmission channel.
  • the uplink channel and the downlink channel between the base station and the UE are reciprocal, that is, the uplink channel and the downlink channel between the base station and the UE experience the same spatial environment, the UE can use the downlink channel obtained by the base station sending the downlink reference signal The information is sent to the uplink transmission channel.
  • the traditional uplink transmission channel uses wideband precoding, but the precision of the wideband precoding is insufficient, and the performance of improving the uplink transmission is limited.
  • this embodiment considers applying the precoding information calculated by using the downlink channel information to the uplink transmission channel.
  • the base station as the second communication node sends a downlink reference signal to the first communication node, where the downlink reference signal includes downlink channel information.
  • Step S7020 Receive the uplink reference signal sent by the first communication node using the downlink channel information.
  • the first communication node After acquiring the downlink channel information, the first communication node calculates the precoding information of the uplink transmission channel based on the downlink channel information, and buffers the precoding information. The precoding is selected from the buffered precoding information to generate the uplink reference signal, and the precoding selection information is buffered. The second communication node will receive the uplink reference signal sent by the first communication node.
  • Step S7030 Send downlink control signaling to the first communication node, where the downlink control signaling includes a subband SRS resource indication.
  • the second communication node After receiving the uplink reference signal sent by the first communication node, the second communication node can send downlink control signaling to the first communication node.
  • the downlink control signaling is used to schedule the uplink transmission channel of the first communication node, and the downlink control signal
  • the command includes the sub-band SRS resource indication.
  • the subband SRS resource indicator is used to indicate the subband precoding of the uplink transmission channel.
  • the precoding used by the uplink transmission channel in a certain uplink subband is determined by the subband SRS resource indicator corresponding to the uplink subband.
  • Step S7040 Receive the uplink transmission channel sent by the first communication node according to the scheduling of the downlink control signaling.
  • the first communication node After the first communication node monitors the downlink control signaling, it can send the uplink transmission channel according to the scheduling of the downlink control signaling. Since the downlink control signaling includes the subband SRS resource indicator, the first communication node can determine the precoding of the uplink transmission channel to be transmitted according to the subband SRS resource indicator in the downlink control signaling, and send the uplink transmission channel. Then the second communication node will receive the uplink transmission channel sent by the first communication node.
  • the uplink transmission method provided in this embodiment is applied to a second communication node.
  • the downlink reference signal is sent to the first communication node, and the downlink reference signal includes downlink channel information, and then the uplink reference signal sent by the first communication node using the downlink channel information is received.
  • the downlink control signaling includes the subband SRS resource indication, and the uplink transmission channel sent by the first communication node according to the scheduling of the downlink control signaling is received, so that the uplink transmission channel and the downlink transmission
  • the uplink transmission channel can use the precoding information calculated by the downlink channel information, which improves the accuracy of channel estimation and is beneficial to the enhancement of uplink transmission.
  • the uplink transmission method provided in this embodiment and the uplink transmission method provided in the embodiment shown in FIG. 1 are processing on the base station side and processing on the UE side respectively.
  • the specific implementation has been carried out in the embodiment shown in FIG. 1 The detailed description will not be repeated in this embodiment.
  • Fig. 8 is a schematic structural diagram of an uplink transmission device provided in an embodiment.
  • the uplink transmission device provided in this embodiment is set at a first communication node. As shown in Fig. 8, the uplink transmission device provided in this embodiment includes:
  • the reference signal receiving module 81 is configured to receive the downlink reference signal sent by the second communication node to obtain downlink channel information; the reference signal sending module 82 is configured to use the downlink channel information to send the uplink reference signal; the monitoring module 83 is configured to monitor the second
  • the downlink control signaling sent by the communication node includes the subband SRS resource indication; the channel sending module 84 is configured to send the uplink transmission channel according to the scheduling of the downlink control signaling.
  • the uplink transmission device provided in this embodiment is used to implement the uplink transmission method of the embodiment shown in FIG. 1.
  • the implementation principle and technical effect of the uplink transmission device provided in this embodiment are similar, and will not be repeated here.
  • Fig. 9 is a schematic structural diagram of another uplink transmission device provided in an embodiment.
  • the uplink transmission device provided in this embodiment is set at a second communication node.
  • the uplink transmission device provided in this embodiment includes:
  • the reference signal sending module 91 is configured to send a downlink reference signal to the first communication node, where the downlink reference signal is used to obtain downlink channel information; the reference signal receiving module 92 is configured to receive an uplink reference signal sent by the first communication node using the downlink channel information
  • the signaling sending module 93 is configured to send downlink control signaling to the first communication node, and the downlink control signaling includes a subband SRS resource indication; the channel receiving module 94 is configured to receive the scheduling of the first communication node according to the downlink control signaling The uplink transmission channel sent.
  • the uplink transmission device provided in this embodiment is used to implement the uplink transmission method of the embodiment shown in FIG. 7.
  • the implementation principle and technical effect of the uplink transmission device provided in this embodiment are similar, and will not be repeated here.
  • FIG. 10 is a schematic structural diagram of an uplink transmission system provided by an embodiment.
  • the uplink transmission system provided in this embodiment includes: a first communication node 101 and a second communication node 102.
  • the first communication node 101 includes the uplink transmission device as shown in FIG. 8, and the second communication node 102 includes the uplink transmission device as shown in FIG. 9.
  • the first communication node 101 is, for example, a UE, and the second communication node 102 is, for example, a base station.
  • FIG. 11 is a schematic structural diagram of a terminal provided by an embodiment.
  • the terminal includes a processor 111, a memory 112, a transmitter 113, and a receiver 114; the number of processors 111 in the terminal can be one or There are multiple.
  • One processor 111 is taken as an example in FIG. 11; the processor 111 and the memory 112 in the terminal may be connected through a bus or other methods. In FIG. 11, the connection through a bus is taken as an example.
  • the memory 112 can be configured to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the uplink transmission method in the embodiment of FIG. 1 of the present application (for example, in the uplink transmission device).
  • the processor 111 implements at least one functional application and data processing of the terminal by running software programs, instructions, and modules stored in the memory 112, that is, implements the above-mentioned uplink transmission method.
  • the memory 112 may mainly include a program storage area and a data storage area.
  • the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to the use of the terminal, and the like.
  • the memory 112 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the transmitter 113 is a module or a combination of devices capable of transmitting radio frequency signals into space, for example, a combination of radio frequency transmitters, antennas, and other devices.
  • the receiver 114 is a module or a combination of devices capable of receiving radio frequency signals from space, for example, a combination of radio frequency receivers, antennas, and other devices.
  • FIG. 12 is a schematic structural diagram of a base station provided by an embodiment.
  • the base station includes a processor 121, a memory 122, a transmitter 123, and a receiver 124; the number of processors 121 in the base station may be one or There are multiple.
  • One processor 121 is taken as an example in FIG. 12; the processor 121 and the memory 122 in the base station may be connected through a bus or other methods. In FIG. 12, the connection through a bus is taken as an example.
  • the memory 122 can be configured to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the uplink transmission method in the embodiment of FIG. 7 of the present application (for example, in the uplink transmission device).
  • the processor 121 implements at least one functional application and data processing of the base station by running the software programs, instructions, and modules stored in the memory 122, that is, implements the above-mentioned uplink transmission method.
  • the memory 122 may mainly include a program storage area and a data storage area.
  • the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to the use of the base station, and the like.
  • the memory 122 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the transmitter 123 is a module or a combination of devices capable of transmitting radio frequency signals into space, for example, a combination of radio frequency transmitters, antennas, and other devices.
  • the receiver 124 is a module or a combination of devices capable of receiving radio frequency signals from space, for example, a combination of radio frequency receivers, antennas, and other devices.
  • An embodiment of the present application also provides a storage medium containing computer-executable instructions.
  • the computer-executable instructions When executed by a computer processor, they are used to perform an uplink transmission method, the method comprising: receiving a downlink reference sent by a second communication node Signal to obtain downlink channel information; use downlink channel information to send uplink reference signals; monitor downlink control signaling sent by the second communication node, downlink control signaling includes subband SRS resource indication; send uplink transmission channel according to the scheduling of downlink control signaling .
  • An embodiment of the present application also provides a storage medium containing computer-executable instructions.
  • the computer-executable instructions are executed by a computer processor, they are used to perform an uplink transmission method.
  • the method includes: sending a downlink reference signal to a first communication node , The downlink reference signal is used to obtain downlink channel information; receiving the uplink reference signal sent by the first communication node using the downlink channel information; sending downlink control signaling to the first communication node, the downlink control signaling including the subband SRS resource indication; receiving the first communication node An uplink transmission channel sent by a communication node according to the scheduling of downlink control signaling.
  • user terminal encompasses any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser, or a vehicle-mounted mobile station.
  • the various embodiments of the present application can be implemented in hardware or dedicated circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device, although the present application is not limited thereto.
  • Computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or written in any combination of one or more programming languages Source code or object code.
  • ISA Instruction Set Architecture
  • the block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions.
  • the computer program can be stored on the memory.
  • the memory can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as but not limited to read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), optical Memory devices and systems (Digital Video Disc (DVD) or Compact Disc (CD)), etc.
  • Computer-readable media may include non-transitory storage media.
  • the data processor can be any type suitable for the local technical environment, such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (Digital Signal Processing, DSP), application specific integrated circuits (ASICs) ), programmable logic devices (Field-Programmable Gate Array, FPGA), and processors based on multi-core processor architecture.
  • DSP Digital Signal Processing
  • ASICs application specific integrated circuits
  • FPGA Field-Programmable Gate Array
  • FPGA Field-Programmable Gate Array

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Abstract

本申请提出一种上行传输方法和装置,上行传输方法应用于第一通信节点,包括:接收第二通信节点发送的下行参考信号,以及获取下行信道信息;利用下行信道信息发送上行参考信号;监测第二通信节点发送的下行控制信令,下行控制信令包括子带SRS资源指示;根据下行控制信令的调度发送上行传输信道。

Description

上行传输方法和装置
本申请要求在2019年09月12日提交中国专利局、申请号为201910867153.9的中国专利申请的优先权,该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信网络,例如涉及一种上行传输方法和装置。
背景技术
随着通信技术和应用需求的发展,终端上行传输信道的速率和覆盖越来越重要。与下行传输可以采用大规模天线技术和频率选择性预编码等技术不同,由于终端的空间大小、硬件成本和硬件实现复杂度等因素的限制,终端上行传输速率一般小于下行接收速率。
终端通过采用功率控制、预编码和波束等技术提高了上行传输信道的速率和覆盖。例如预编码技术中,上行传输使用宽带预编码,但宽带预编码对信道的估计精度不足,提高上行传输的性能有限。
发明内容
本申请提供一种上行传输方法和装置,使上行传输信道能够使用下行信道信息估计的预编码,并指示子带粒度的预编码信息,提高了信道估计精度,有利于上行传输的增强。
本申请实施例提供一种上行传输方法,应用于第一通信节点,包括:
接收第二通信节点发送的下行参考信号,获取下行信道信息;
利用下行信道信息发送上行参考信号;
监测第二通信节点发送的下行控制信令,下行控制信令包括子带SRS资源指示;
根据下行控制信令的调度发送上行传输信道。
在一种可能的实现方式中,上行参考信号包括N个SRS资源组,第i个SRS资源组包括M i个SRS资源,其中,每个SRS资源组与一个下行参考信号关联,i、N、M i为大于或等于1的整数,1≤i≤N。
在一种可能的实现方式中,SRS资源与PTRS端口的关联关系包括以下任一种方式:
所有SRS资源不关联PTRS端口、每一个SRS资源关联一个PTRS端口。
在一种可能的实现方式中,利用下行信道信息发送上行参考信号,包括:
根据下行信道信息确定上行参考信号每一个上行子带的预编码;
根据上行参考信号每一个上行子带的预编码生成上行参考信号并发送上行参考信号。
在一种可能的实现方式中,上行子带的划分方式,包括以下至少一种方法:
根据上行传输信道所在载波分量的带宽和子带划分粒度大小划分;
根据上行传输信道所在BWP的频域范围和子带划分粒度大小划分;
根据SRS资源的频域范围和子带划分粒度大小划分。
在一种可能的实现方式中,子带划分粒度大小由以下方式至少之一进行指示:高层信令、物理层信令、上行传输信道所在载波分量的带宽、上行传输信道所在BWP的频域范围、SRS资源的频域范围。
在一种可能的实现方式中,下行控制信令包括以下任一种方式:
一个调度上行传输信道的DCI;
两个独立调度上行传输信道的DCI;
两个联合调度上行传输信道的DCI。
在一种可能的实现方式中,一个调度上行传输信道的DCI包含子带SRS资源指示。
在一种可能的实现方式中,两个独立调度上行传输信道的DCI指示的频域范围不重叠,且两个独立调度上行传输信道的DCI均包含子带SRS资源指示。
在一种可能的实现方式中,两个联合调度上行传输信道的DCI包括第一DCI和第二DCI,第一DCI和第二DCI共同调度上行传输信道。
在一种可能的实现方式中,第一DCI包括以下信息至少之一:载波指示、BWP指示、频域资源分配、时域资源分配、跳频指示、跳频偏移量指示、调制编码方式、冗余版本、进程号、SRS资源指示、SRS资源组指示、传输层数指示、DMRS端口指示、DMRS序列初始化指示、第二DCI的大小指示;
第二DCI包括以下信息至少之一:上行子带编号、多个子带SRS资源指示、调制编码方式、冗余版本、冗余版本偏移量、DMRS序列初始化指示、DMRS序列初始化的偏移量指示。
在一种可能的实现方式中,第二DCI的信息比特大小通过以下方式至少之 一确定:第一DCI的第二DCI的大小指示、SRS资源与PTRS端口的关联关系、SRS资源组个数、每个SRS资源组包含的SRS资源个数,SRS资源组的选择、每个上行子带包含的SRS资源个数、第一DCI的跳频指示、第一DCI的跳频偏移量指示、第一DCI的SRS资源指示、第一DCI的频域资源分配。
在一种可能的实现方式中,每个上行子带包含的SRS资源个数为对应上行子带所占频域范围内存在的SRS资源个数;每个上行子带包含的SRS资源个数与总SRS资源个数的关系包括如下至少一种方式:
配置所有SRS资源占用的频域范围相同;
不同SRS资源占用的频域范围不同,上行子带的划分方式用于保证每个上行子带包含的SRS资源个数与总SRS资源个数相同;
包含的SRS资源个数小于总SRS资源个数的上行子带,该上行子带所属的频域范围不能用于调度上行传输信道;
包含的SRS资源个数小于总SRS资源个数的上行子带不存在对应的子带SRS资源指示;
包含的SRS资源个数小于总SRS资源个数的上行子带用于调度上行传输信道且存在对应的子带SRS资源指示。
在一种可能的实现方式中,上行子带编号由以下信息至少之一确定:上行子带的划分方式、第一DCI的跳频指示、第一DCI的跳频偏移量指示、第一DCI的频域资源分配。
在一种可能的实现方式中,每个子带SRS资源指示的位宽由以下信息至少之一确定:SRS资源与PTRS端口的关联关系、SRS资源组个数、每个SRS资源组包含的SRS资源个数,SRS资源组的选择、第一DCI的SRS资源指示、每个上行子带包含的SRS资源个数。
在一种可能的实现方式中,第二DCI的上行子带编号和多个子带SRS资源指示的关系,包括以下方式至少之一:
第二DCI包含多个子带SRS资源指示,且不包含上行子带编号;
第二DCI包含上行子带编号和多个子带SRS资源指示,其中,一个上行子带编号对应一个子带SRS资源指示;
第二DCI包含上行子带编号和多个子带SRS资源指示,其中,一组上行子带编号对应一个子带SRS资源指示。
在一种可能的实现方式中,通过以下任一种方式确定是否存在第二DCI:无线资源控制RRC信令、介质访问控制层控制单元MAC CE信令、第一DCI 的提示信息。
在一种可能的实现方式中,第一DCI的提示信息,包括以下信息的至少一种:第一DCI的扰码、第一DCI的冗余版本、第一DCI的SRS资源指示、第一DCI的SRS资源组指示、第一DCI的DMRS序列初始化指示。
在一种可能的实现方式中,上行传输信道的层数由以下信息至少之一确定:第一DCI的SRS资源指示、第一DCI的传输层数指示、第一DCI的DMRS端口指示、第二DCI的多个子带SRS资源指示。
在一种可能的实现方式中,根据下行控制信令的调度发送上行传输信道,包括:
若未监测到第二DCI,则根据第一DCI调度上行传输信道;
若监测到第二DCI,则根据第一DCI和第二DCI联合调度上行传输信道。
在一种可能的实现方式中,第二通信节点根据以下方式至少之一确定监测到第二DCI:
上行传输信道采用第二DCI指示的调制编码方式;
上行传输信道采用第二DCI指示的冗余版本;
上行传输信道的冗余版本由第一DCI指示的冗余版本和第二DCI指示的冗余版本偏移量共同确定;
上行传输信道的DMRS序列初始化采用第二DCI中DMRS序列初始化指示;
上行传输信道的DMRS序列初始化由第一DCI指示的DMRS序列初始化和第二DCI指示的DMRS序列初始化偏移量共同确定。
在一种可能的实现方式中,子带SRS资源指示用于指示上行传输信道的预编码,上行传输信道在每个上行子带使用的预编码,通过每个上行子带对应的子带SRS资源指示确定。
本申请实施例提供一种上行传输方法,应用于第二通信节点,包括:
向第一通信节点发送下行参考信号,下行参考信号用于获取下行信道信息;
接收第一通信节点利用下行信道信息发送的上行参考信号;
向第一通信节点发送下行控制信令,下行控制信令包括子带SRS资源指示;
接收第一通信节点根据下行控制信令的调度发送的上行传输信道。
在一种可能的实现方式中,利用下行信道信息发送上行参考信号,包括:
根据下行信道信息确定上行参考信号每一个上行子带的预编码;
根据上行参考信号每一个上行子带的预编码生成上行参考信号并发送上行参考信号。
在一种可能的实现方式中,上行子带的划分方式,包括以下至少一种方法:
根据上行传输信道所在载波分量的带宽和子带划分粒度大小划分;
根据上行传输信道所在BWP的频域范围和子带划分粒度大小划分;
根据SRS资源的频域范围和子带划分粒度大小划分。
本申请实施例提供一种上行传输装置,包括处理器和存储器,处理器用于运行储存在存储器里的程序指令以执行上述任一种上行传输方法的可能的实现方式。
本申请实施例提供一种上行传输装置,设置于第一通信节点,包括:
参考信号接收模块,设置为接收第二通信节点发送的下行参考信号,获取下行信道信息;
参考信号发送模块,设置为利用下行信道信息发送上行参考信号;
监测模块,设置为监测第二通信节点发送的下行控制信令,下行控制信令包括子带SRS资源指示;
信道发送模块,设置为根据下行控制信令的调度发送上行传输信道。
本申请实施例提供一种上行传输装置,设置于第二通信节点,包括:
参考信号发送模块,设置为向第一通信节点发送下行参考信号,下行参考信号用于获取下行信道信息;
参考信号接收模块,设置为接收第一通信节点利用下行信道信息发送的上行参考信号;
信令发送模块,设置为向第一通信节点发送下行控制信令,下行控制信令包括子带SRS资源指示;
信道接收模块,设置为接收第一通信节点根据下行控制信令的调度发送的上行传输信道。
本申请实施例提供一种上行传输系统,上行传输系统包括第一通信节点和第二通信节点;
第一通信节点包括任一种设置于第一通信节点中的上行传输装置;
第二通信节点包括任一种设置于第二通信节点中的上行传输装置。
附图说明
图1为一实施例提供的一种上行传输方法的流程图;
图2为上行参考信号的SRS资源示意图;
图3为SRS资源的子带划分示意图;
图4为SRS资源组的选择示意图;
图5为第一DCI调度的上行传输信道的频域范围示意图;
图6为存在跳频的情况下,第一DCI调度的上行传输信道的频域范围示意图;
图7为一实施例提供的另一种上行传输方法的流程图;
图8为一实施例提供的一种上行传输装置的结构示意图;
图9为一实施例提供的另一种上行传输装置的结构示意图;
图10为一实施例提供的一种上行传输系统的结构示意图;
图11为一实施例提供的一种终端的结构示意图;
图12为一实施例提供的一种基站的结构示意图。
具体实施方式
下文中将结合附图对本申请的实施例进行详细说明。
在无线通信中,当上行信道和下行信道具有互易性时,可以通过下行信道的估计,互易至上行传输,减小开销并增加预编码的精度。但在上行信道和下行信道具有互易性时,如何为上行传输信道进行子带预编码的选择,是亟待解决的问题。
图1为一实施例提供的一种上行传输方法的流程图,如图1所示,本实施例提供的方法包括如下步骤。
步骤S1010,接收第二通信节点发送的下行参考信号,获取下行信道信息。
本实施例提供的上行传输方法应用于无线通信系统中的第一通信节点,第一通信节点例如为用户设备(User Equipment,UE)。UE在无线通信系统中使用上行传输信道进行上行传输。基站通过下行传输信道向UE发送下行数据和下 行信令。当基站和UE之间的上行信道和下行信道具有互易性时,即基站和UE之间的上行信道和下行信道的所经历的空间环境相同,UE可以使用基站发送下行参考信号获取的下行信道信息去发送上行传输信道。例如对于上行传输信道所使用的预编码,传统的上行传输信道采用宽带预编码,而宽带预编码的精度不足,提高上行传输的性能有限。而在基站和UE之间的上行信道和下行信道具有互易性时,本实施例考虑采用下行信道信息计算的预编码信息应用于上行传输信道。
首先,作为第一通信节点的UE需要接收作为第二通信节点的基站发送的下行参考信号,并从下行参考信号中获取下行信道信息。
步骤S1020,利用下行信道信息发送上行参考信号。
第一通信节点在获取到下行信道信息后,基于下行信道信息计算上行传输信道的预编码信息,且缓存预编码信息。在缓存的预编码信息中选择预编码用于生成上行参考信号,并缓存预编码的选择信息。
利用下行信道信息发送上行参考信号,包括:根据下行信道信息确定上行参考信号每一个上行子带的预编码;根据上行参考信号每一个上行子带的预编码生成上行参考信号并发送上行参考信号。
上行参考信号,包含N个探测参考信号(Sounding Reference Signal,SRS)资源组,N为大于或等于1的整数。其中第i个SRS资源组包含M i个SRS资源,M i为大于或等于1的整数。来自不同SRS资源组的SRS资源可以同时发送。来自不同SRS资源组的SRS资源,其时域行为可以相同,比如周期、半持续或者非周期发送。每一个SRS资源组关联一个下行参考信号,下行参考信号用于获取下行信道信息。第一通信节点利用下行信道信息发送上行参考信号,指的是根据下行信道信息确定上行参考信号每一个上行子带的预编码,再根据上行参考信号每一个上行子带的预编码生成上行参考信号并发送上行参考信号。例如图2所示,图2为上行参考信号的SRS资源示意图,存在第i个和第i+1个SRS资源组,每个SRS资源组分别包含M i和M i+1个SRS资源及各个SRS资源所占的频域范围如图所示。用w (k,i,j)表示第i个SRS资源组的第j个SRS资源在第k 个上行子带的预编码。其中,w (k,i,j)是UE根据第i个SRS资源组关联的下行参考信号获取的下行信道信息计算得到的。
SRS资源与相位追踪参考信号(Phase Tracking Reference Signal,PTRS)端口的关联关系,至少采取以下方式之一:所有SRS资源不关联PTRS端口、每一个SRS资源关联一个PTRS端口。其中,PTRS用于跟踪相位噪声。
步骤S1030,监测第二通信节点发送的下行控制信令,下行控制信令包括子带SRS资源指示。
第一通信节点在向第二通信节点发送上行参考信号后,第二通信节点向第一通信节点发送下行控制信令,下行控制信令用于调度第一通信节点的上行传输信道,下行控制信令包括子带SRS资源指示。子带SRS资源指示,用于指示上行传输信道的子带预编码,上行传输信道在某个上行子带使用的预编码,通过该上行子带对应的子带SRS资源指示确定。
上行子带的划分方式,使用以下方法至少之一:
根据上行传输信道所在的载波分量的带宽和子带划分粒度大小划分。
根据上行传输信道所在部分带宽(Bandwidth Part,BWP)的频域范围和子带划分粒度大小划分。
根据SRS资源的频域范围和子带划分粒度大小划分。
子带划分粒度大小由以下方式之一进行指示:高层信令、物理层信令、上行传输信道所在载波分量的带宽、上行传输信道所在BWP的频域范围、SRS资源的频域范围。其中高层信令例如是无线资源控制(Remote Resource Control,RRC)信令,或者介质访问控制层控制单元(Media Access Control Control Element,MAC CE)信令,物理层信令例如是下行控制信息(Downlink Control Information,DCI)。
根据SRS资源的频域范围和子带划分粒度大小确定的方式,一个具体的例子是,如图3,图3为SRS资源的子带划分示意图,假设有两个SRS资源组,每个资源组有3个SRS资源,则上行子带的划分方式可以采取如下方式之一划分:
1)根据所有SRS资源中,带宽最大的SRS资源及子带划分粒度。
2)根据所有SRS资源的频域范围的并集及子带划分粒度。
3)根据所有SRS资源中,带宽最小的SRS资源及子带划分粒度。
4)根据所有SRS资源的频域范围的交集及子带划分粒度。
下行控制信令调度上行传输信道的方式包括以下任一种方式:
一个调度上行传输信道的DCI;
两个独立调度上行传输信道的DCI;
两个联合调度上行传输信道的DCI。
步骤S1040,根据下行控制信令的调度发送上行传输信道。
第一通信节点在监测到下行控制信令后,即可根据下行控制信令的调度发送上行传输信道。由于下行控制信令中包括子带SRS资源指示,那么第一通信节点就可以根据下行控制信令中的子带SRS资源指示确定所需传输的上行传输信道的预编码,并发送上行传输信道。
本实施例提供的上行传输方法,应用于第一通信节点,在接收第二通信节点发送的下行参考信号后,获取下行信道信息,然后利用下行信道信息发送上行参考信号,在监测第二通信节点发送的下行控制信令时,下行控制信令包括子带SRS资源指示,根据下行控制信令的调度发送上行传输信道,使得上行传输信道和下行传输信道存在互易性时,上行传输信道可以使用下行信道信息计算预编码信息,提高了信道估计精度,有利于上行传输的增强。
在一实施例中,下行控制信令调度上行传输信道包括一个调度上行传输信道的DCI,一个调度上行传输信道的DCI包含子带SRS资源指示。具体来说,该下行控制信令至少包含以下信息之一:载波指示,BWP指示、频域资源分配、时域资源分配、跳频指示,跳频偏移量指示、调制编码方式、冗余版本、进程号、多个子带SRS资源指示、宽带SRS资源指示、传输层数指示、SRS资源组指示、解调参考信号(DeModulation Reference Signal,DMRS)端口指示、DMRS序列初始化指示。多个子带SRS资源指示,用于指示上行传输信道的预编码,上行传输信道在某个上行子带使用的预编码,通过该上行子带对应的子带SRS资源指示确定。在不冲突的情况下,下行控制信令包括一个DCI的实现方法可以和下行控制信令包括两个联合调度上行传输信道的DCI的实现方法相同。
在一实施例中,下行控制信令调度上行传输信道包括两个独立调度上行传输信道的DCI,两个独立调度上行传输信道的DCI指示的频域范围不重叠,且两个独立调度上行传输信道的DCI均包含子带SRS资源指示。具体来说,每个下行控制信令都至少包含以下信息之一:载波指示,BWP指示、频域资源分配、时域资源分配、跳频指示,跳频偏移量指示、调制编码方式、冗余版本、进程号、多个子带SRS资源指示、宽带SRS资源指示、传输层数指示、SRS资源组指示、DMRS端口指示、DMRS序列初始化指示。多个子带SRS资源指示,用于指示上行传输信道的预编码,上行传输信道在某个上行子带使用的预编码, 通过该上行子带对应的子带SRS资源指示确定。在不冲突的情况下,下行控制信令包括两个独立调度上行传输信道的DCI的实现方法可以和下行控制信令包括两个联合调度上行传输信道的DCI的实现方法相同。
在一实施例中,下行控制信令调度上行传输信道包括两个联合调度上行传输信道的DCI。两个联合调度上行传输信道的DCI包括第一DCI和第二DCI,第一DCI和第二DCI共同调度上行传输信道。
第一DCI包括以下信息至少之一:载波指示,BWP指示、频域资源分配、时域资源分配、跳频指示,跳频偏移量指示、调制编码方式、冗余版本、进程号、SRS资源指示,SRS资源组指示、传输层数指示、DMRS端口指示、DMRS序列初始化指示,第二DCI的大小指示。第二DCI包括以下信息至少之一:上行子带编号,多个子带SRS资源指示,调制编码方式,冗余版本,冗余版本偏移量、DMRS序列初始化指示、DMRS序列初始化的偏移量指示。其中,DMRS用于上行传输信道的解调。
第一通信节点通过以下方式至少之一,确定是否存在第二DCI:基站配置的RRC信令,基站配置的MAC CE信令、第一DCI的提示信息。第一DCI的提示信息,包括以下方式至少之一:第一DCI的扰码,第一DCI的冗余版本,第一DCI的SRS资源指示,第一DCI的SRS资源组指示,第一DCI的DMRS序列初始化指示。第一DCI的扰码,例如第一DCI的无线网络临时标识(Radio Network Temporary Identifier,RNTI),指的是第一DCI的循环冗余校验(Cyclic Redundancy Check,CRC)校验比特采用特定的RNTI进行加扰,用于通知终端是否存在第二DCI。第一DCI的DMRS序列初始化指示,指的是基站通过DMRS序列初始化指示通知终端是否存在第二DCI。
第二DCI的信息比特大小通过以下方式至少之一确定:第一DCI中的第二DCI的大小指示、SRS资源与PTRS端口的关联关系、SRS资源组个数、每个SRS资源组包含的SRS资源个数,SRS资源组的选择、每个上行子带包含的SRS资源个数、第一DCI的跳频指示、第一DCI的跳频偏移量指示、第一DCI的SRS资源指示、第一DCI的频域资源分配。其中,每个子带SRS资源指示的位宽,由以下信息至少之一确定:SRS资源与PTRS端口的关联关系、SRS资源组个数、每个SRS资源组包含的SRS资源个数,SRS资源组的选择、第一DCI的SRS资源指示、每个上行子带包含的SRS资源个数。
上行传输信道的层数由以下信息至少之一确定:第一DCI的SRS资源指示、第一DCI的传输层数指示、第一DCI的DMRS端口指示、第二DCI的多个子带SRS资源指示。
上行子带编号,由以下信息至少之一确定:上行子带的划分方式、第一DCI 的跳频指示、第一DCI的跳频偏移量指示、第一DCI的频域资源分配。
第二DCI的上行子带编号和多个子带SRS资源指示的关系,可以通过以下方式至少之一:
第二DCI不包含上行子带编号,只包含多个子带SRS资源指示;
第二DCI包含上行子带编号和多个子带SRS资源指示,其中,一个上行子带编号对应一个子带SRS资源指示;
第二DCI包含上行子带编号和多个子带SRS资源指示,其中,一组上行子带编号对应一个子带SRS资源指示。
子带SRS资源指示,用于指示上行传输信道的预编码,上行传输信道在某个上行子带使用的预编码,通过该上行子带对应的子带SRS资源指示确定。
每个上行子带包含的SRS资源个数,指的是该上行子带所占的频域范围内存在SRS资源的个数,与SRS的资源组选择有关。每个上行子带包含的SRS资源个数与总共SRS资源个数的关系,会影响第一DCI的SRS资源指示和第二DCI的子带SRS资源指示。其中,总共SRS资源个数,由以下方式至少之一确定:所有SRS资源组包含的总共SRS资源个数;与SRS资源组的选择有关,表示被选中的SRS资源组中总共包含的SRS资源个数。例如图4所示,图4为SRS资源组的选择示意图,假设存在2个SRS资源组,第1个SRS资源组包含3个SRS资源,第2个SRS资源组包含4个SRS资源。如果选择了第1个SRS资源组,则总共SRS资源个数为3,第k+1个上行子带包含的SRS资源个数为2;如果选择了第2个SRS资源组,则总共SRS资源个数为4,第k+1个上行子带包含的SRS资源个数为3;如果选择了第1个SRS资源组和第2个SRS资源组,则总共SRS资源个数为7,第k+1个上行子带包含的SRS资源个数为5。
每个上行子带包含的SRS资源个数为对应上行子带所占频域范围内存在的SRS资源个数,每个上行子带包含的SRS资源个数与总共SRS资源个数的关系,可以采用如下限制之一:
配置所有SRS资源占用的频域范围相同,则每个上行子带包含的SRS资源个数与总共SRS资源个数相同;不同SRS资源占用的频域范围可能不同,上行子带的划分方式保证每个上行子带包含的SRS资源个数与总共SRS资源个数相同;包含的SRS资源个数小于总共SRS资源个数的上行子带,不能用于调度上行传输信道;包含的SRS资源个数小于总共SRS资源个数的上行子带,该上行子带不存在对应的子带SRS资源指示;包含的SRS资源个数小于总共SRS资源个数的上行子带,该上行子带可以用于调度上行传输信道且存在对应的子带SRS资源指示。
监测第二通信节点的控制信令的操作,第一通信节点未能监测到第二DCI时,上行传输信道采用第一DCI指示的信息;存在第二DCI且第一通信节点监测到第二DCI,上行传输信道采用两个DCI联合指示的信息。第一通信节点通过以下方式至少之一,确认两个DCI都被第一通信节点监测成功:
上行传输信道采用第二DCI指示的调制编码方式;上行传输信道采用第二DCI指示的冗余版本;上行传输信道的冗余版本由第一DCI指示的冗余版本和第二DCI指示的冗余版本偏移量共同确定;上行传输信道的DMRS序列初始化采用第二DCI中DMRS序列初始化指示;上行传输信道的DMRS序列初始化由第一DCI指示的DMRS序列初始化和第二DCI指示的DMRS序列初始化偏移量共同确定。
下行控制信令包括两个联合调度上行传输信道的DCI,包括下述一种具体的实现方式,下面将以具体的实施例对不同情况下两个联合调度上行传输信道的DCI进行详细说明。
在一实施例中,假设只存在一个SRS资源组,该资源组包含M个SRS资源,且所有SRS资源不关联PTRS端口,本实施例假设M=4。第一DCI不指示跳频、其调度的上行传输信道的部分频域范围,如图5黑色部分所示,图5为第一DCI调度的上行传输信道的频域范围示意图。本实施例假设,一个上行子带的粒度大小为4个资源块(Resource Block,RB)。
第一DCI的SRS资源指示,可以采用以下方式之一:比特图、联合编码。
一个具体例子是,第一DCI的SRS资源指示为1010,上行传输信道的层数由第一DCI的SRS资源指示确定,则表示上行传输信道的层数是2层,且选择的是该SRS资源组的第1个SRS资源和第3个SRS资源。本实施例假设存在第二DCI,第二DCI中多个子带SRS资源的指示,每个子带SRS资源指示选择的SRS资源个数必须与第一DCI中SRS资源指示选择的SRS资源个数相同,具体可以采取如下方式之一:
方式1:第二DCI不包含上行子带编号,只包含多个子带SRS资源指示。如图5所示,某个上行子带中至少包含一个RB被调度用于上行传输,则该上行子带对应一个子带SRS资源指示。子带SRS资源指示可以采用以下方式之一:比特图、联合编码。一个采用比特图的具体例子是,第l个上行子带和第l+1个上行子带的子带SRS资源指示分别为0110和1001。上述子带SRS资源指示表示,上行传输信道第1层的第l个上行子带内,被调度的频域资源采用的预编码依据第2个SRS资源发送时在对应上行子带采用的预编码;上行传输信道第2层的第l个上行子带内,被调度的频域资源采用的预编码依据第3个SRS资源发送时在对应上行子带采用的预编码;上行传输信道第1层的第l+1个上行子带内, 被调度的频域资源采用的预编码依据第1个SRS资源发送时在对应上行子带采用的预编码;上行传输信道第2层的第l+1个上行子带内,被调度的频域资源采用的预编码依据第4个SRS资源发送时在对应上行子带采用的预编码。
另一种实现方式是:至少有一个RB用于上行传输信道的部分上行子带,可以对应同一个子带SRS资源指示,减小第二DCI的开销。一个具体的例子是,如图5所示,第S-1个上行子带有3个RB被调度,第S个上行子带有1个RB被调度,且4个RB连续,为了减小第二DCI的开销,第S个上行子带和第S-1个上行子带对应同一个子带SRS资源指示。
此外,至少有一个RB用于上行传输信道的一些上行子带,可以未对应任何子带SRS资源指示,此时,这些上行子带默认采用第一DCI中的SRS资源指示,减小第二DCI的开销。
方式2:第二DCI包含上行子带编号和多个子带SRS资源指示,其中,一个上行子带编号对应一个子带SRS资源指示。上行子带编号由上行子带的划分方式和上行传输信道的频域范围共同确定,一个具体的例子是,如图5所示,第l+1个上行子带和第S-1个上行子带至少包含一个RB被指示用于上行传输信道。将这两个上行子带重新分别编号为p和q。子带SRS资源指示,可以采用以下方式之一:比特图、联合编码。一个采用比特图的具体例子是,编号为p和q的子带SRS资源指示分别为0110和1001。上述子带SRS资源指示表示,上行传输信道第1层的编号为p的子带内,被调度的频域资源采用的预编码依据第2个SRS资源发送时在对应上行子带采用的预编码;上行传输信道第2层编号为p的子带内,被调度的频域资源采用的预编码依据第3个SRS资源发送时在对应上行子带采用的预编码;上行传输信道第1层编号为q的子带内,被调度的频域资源采用的预编码依据第1个SRS资源发送时在对应上行子带采用的预编码;上行传输信道第2层编号为q的子带内,被调度的频域资源采用的预编码依据第4个SRS资源发送时在对应上行子带采用的预编码。
另一种实现方式是:至少有一个RB用于上行传输信道的部分上行子带,可以对应同一个上行子带编号,减小第二DCI的开销。一个具体的例子是,如图5所示,第S-1个上行子带有3个RB被调度,第S个上行子带有1个RB被调度,且4个RB连续,为了减小第一DCI的开销,第S个上行子带和第S-1个上行子带对应同一个上行子带编号。
此外,并非所有上行子带编号必须对应一个子带SRS资源指示,一些上行子带编号未对应任何子带SRS资源指示时,默认采用第一DCI中的SRS资源指示,减小第二DCI的开销。
方式3:第二DCI包含上行子带编号和多个子带SRS资源指示,其中,一 组上行子带编号对应一个子带SRS资源指示。上行子带编号由上行子带的划分方式和上行传输信道的频域范围共同确定。如图5所示,第l+1个上行子带和第S-1个上行子带至少包含一个RB被指示用于上行传输信道。将这两个上行子带重新分别编号为p和q。子带SRS资源指示,可以采用以下方式之一:比特图、联合编码。一组上行子带编号对应一个子带SRS资源指示,一个具体的例子是,编号为p和q的上行子带对应同一个子带SRS资源指示:0101。上述子带SRS资源指示表示,上行传输信道编号为p的子带内,第1层被调度的频域资源采用的预编码依据第2个SRS资源发送时在对应上行子带采用的预编码;上行传输信道编号为p的子带内,第2层被调度的频域资源采用的预编码依据第4个SRS资源发送时在对应上行子带采用的预编码;上行传输信道编号为q的子带内,第1层被调度的频域资源采用的预编码依据第2个SRS资源发送时在对应上行子带采用的预编码;上行传输信道编号为q的子带内,第2层被调度的频域资源采用的预编码依据第4个SRS资源发送时在对应上行子带采用的预编码。
另一种实现方式,至少有一个RB用于上行传输信道的部分上行子带,多个上行子带可以对应同一个上行子带编号,减小第二DCI的开销。一个具体的例子是,如图5所示,第S-1个上行子带有3个RB被调度,第S个上行子带有1个RB被调度,且4个RB连续,为了减小第一DCI的开销,第S个上行子带和第S-1个上行子带对应同一个上行子带编号。
此外,并非所有上行子带编号必须对应一个子带SRS资源指示,一些上行子带编号未对应任何子带SRS资源指示时,默认采用第一DCI中的SRS资源指示,减小第二DCI的开销。
另外,一个确定上行传输信道层数的例子。假设第一DCI的DMRS端口指示选择了3个DMRS端口,第一DCI的SRS资源指示为1000。如果不存在第二DCI或者没有监测到第二DCI,则上行传输信道的层数由第一DCI的SRS资源指示确定,为1层,且选择的是该SRS资源组的第1个SRS资源,上行传输信道使用的DMRS端口为第一DCI中DMRS端口指示的其中一个DMRS端口。如果存在且监测到第二DCI,则上行传输信道的层数可以由以下方式之一确定:第一个DMRS端口指示的DMRS端口数目;第二DCI的多个子带SRS资源指示。第一个DMRS端口指示的DMRS端口数目确定上行传输信道的层数,上述例子的传输层数为3,则第二DCI的每个子带SRS资源指示必须指示3个SRS资源,且上行传输信道使用的DMRS端口为第一DCI中DMRS端口指示的所有DMRS端口。第二DCI的多个子带SRS资源指示确定上行传输信道的层数,例如第二DCI的每个子带SRS资源指示都指示2个SRS资源,则表示上行传输信道的层数为2,且上行传输信道每一层的DMRS端口分别对应于第一DCI中DMRS端口指示的其中两个DMRS端口。
在另一实施例中,存在1个SRS资源组,且每一个SRS资源都关联一个PTRS端口。上行传输信道同一层的不同上行子带关联的PTRS端口必须相同。上行传输信道PTRS端口的选择可以通过以下方式之一确定:第一DCI的SRS资源指示、第一DCI中的SRS资源指示和第二个子带SRS资源指示共同确定、第二DCI的子带SRS资源指示确定。
上行传输PTRS端口的选择通过第一DCI的SRS资源指示确定。例如:假设一个SRS资源组中有4个SRS资源,第1、2个SRS资源关联PTRS端口0,第3、4个SRS资源关联PTRS端口1,且上行传输信道的层数由第一级DCI的SRS资源指示确定。举例如下:
1)若第一DCI的SRS资源指示为1000,则上行传输信道的第1层关联PTRS端口0。因为上行传输信道同一层的不同上行子带关联的PTRS端口必须相同,所以每一个子带SRS资源指示只能从第1和第2个SRS资源中选择1个。此时,第二DCI中的每一个子带SRS资源指示的位宽只需1比特。
2)若第一DCI的SRS资源指示为0011,则上行传输信道的第1层和第2层关联同一个PTRS端口1。因为上行传输信道同一层的不同上行子带关联的PTRS端口必须相同,此时不存在第二DCI。
3)若第一DCI的SRS资源指示为0110,则上行传输信道的第1层和第2层分别关联PTRS端口0和PTRS端口1。此时如果存在第二DCI,则子带SRS资源指示用于上行传输第1层的子带SRS资源指示只能从第1个SRS资源和第2个SRS资源中选择一个;用于上行传输第2层的子带SRS资源指示只能从第3个SRS资源和第4个SRS资源中选择一个。此时,第二DCI中的每一个子带SRS资源指示的位宽只需2比特。
4)若第一DCI的SRS资源指示为1110,则上行传输信道的第1层和第2层关联同一个PTRS端口0,第3层关联PTRS端口1。此时,每一个子带SRS资源指示,只能从第3个SRS资源和第4个SRS资源中选择一个用于第3层的传输。第二DCI中的每一个子带SRS资源指示的位宽只需1比特。
上行传输PTRS端口的选择通过第一DCI中的SRS资源指示和第二DCI的子带SRS资源指示共同确定,一个具体的例子是:假设一个SRS资源组中有4个SRS资源,第1、2个SRS资源关联PTRS端口0,第3、4个SRS资源关联PTRS端口1,且上行传输信道的层数由第一DCI的SRS资源指示确定。举例如下:
1)若第一DCI的SRS资源指示为1000/0100/0010/0001,表示上行传输信道的层数为1,第二DCI的每一个子带SRS资源指示只能指示一个SRS资源。 具体来说,可以选择以下方式之一:所有子带SRS资源指示只能从第1个和第2个SRS资源中选择一个、所有子带SRS资源指示只能从第3个和第4个SRS资源中选择一个。一个更为具体的例子是,上行子带编号最低的子带SRS资源指示是0100,表示上行传输信道的第1层关联PTRS端口0,其余所有子带SRS资源指示只能从第1、2个SRS资源中选择1个。此时,其余每个子带SRS资源指示只需要1比特。
2)若第一DCI的SRS资源指示为1100/0011,表示上行传输信道的层数为2,则第二DCI的每一个子带SRS资源指示只能指示2个SRS资源。每个子带SRS资源指示都可以从4个SRS资源中任意选择2个SRS资源,但需要满足上行传输信道同一层的不同上行子带关联的PTRS端口必须相同。
3)若第一DCI的SRS资源指示为1110/1101/1011/0111,表示上行传输信道的层数为3,则第二DCI的每一个子带SRS资源指示只能指示3个SRS资源。每个子带SRS资源指示都可以从4个SRS资源中任意选择3个SRS资源,但需要满足上行传输信道同一层的不同上行子带关联的PTRS端口必须相同。
4)若第一DCI的SRS资源指示为1111,表示上行传输信道的层数为4。此时,不存在第二DCI。
其余实现方法,在与其它实施方式不冲突的情况下,可以采用相同的实现方法。
在另一实施例中,存在N个SRS资源组,其中第i个SRS资源组包含M i个SRS资源。
第二DCI的子带SRS资源指示,可以采取如下限制之一:
多个子带SRS资源指示在同一个资源组选择的SRS资源个数必须相同;多个子带SRS资源指示在同一个资源组选择的SRS资源个数可以不同。
可以通过以下方式之一,确定SRS资源组的选择情况:
高层参数指示;
第一DCI的SRS资源组选择指示;
第一DCI的SRS资源指示隐含通知SRS资源组的选择。
高层参数指示或者第一DCI的SRS资源组选择指示的方式,且所有SRS资源都不关联PTRS端口,第一DCI的SRS资源指示的位宽和第二DCI一个子带SRS资源指示的位宽,可以采取以下几种情况之一:
1)只能选择一个SRS资源组
A:若不同SRS资源组的SRS资源个数相同,即M 1=M 2=Λ=M N,则第一DCI的SRS资源指示的位宽大小为
Figure PCTCN2020114826-appb-000001
其中,L max表示终端最多能支持的层数或者基站允许该终端最大的传输层数。假设第一DCI指示了RI个SRS资源,则第二DCI一个子带SRS资源指示的位宽大小为以下方式之一:
M 1比特;
Figure PCTCN2020114826-appb-000002
比特。
B:若不同SRS资源组的SRS资源个数不同,则第一DCI的SRS资源指示的位宽大小为以下方式之一:
max{M 1,M 2,K,M N}比特;
Figure PCTCN2020114826-appb-000003
比特。
其中,L max表示终端最多能支持的层数或者基站允许该终端最大的传输层数。假设第一DCI指示了RI个SRS资源,且选择的是第x(x∈{1,2,K,N})个SRS资源组,则第二DCI一个子带SRS资源指示的位宽大小为以下方式之一:
M x比特;
Figure PCTCN2020114826-appb-000004
比特。
2)可以选择多个SRS资源组,假设选择了P(P≤N)个SRS资源组,分别对应于第Q 1,Q 2,K,Q P个SRS资源组。第一DCI的SRS资源指示的位宽大小为以下方式之一:
Figure PCTCN2020114826-appb-000005
比特;
Figure PCTCN2020114826-appb-000006
比特;
Figure PCTCN2020114826-appb-000007
比特。
其中,
Figure PCTCN2020114826-appb-000008
表示终端在第i个天线端口组最多能支持的层数或者基站允许该终端在第i个天线端口组最大的传输层数。L max表示终端最多能支持的层数或者基站允许该终端最大的传输层数。假设第一DCI在第Q i个SRS资源组中指示了
Figure PCTCN2020114826-appb-000009
个SRS资源,则第二DCI一个子带SRS资源指示的位宽大小为以下方式之一:
Figure PCTCN2020114826-appb-000010
比特;
Figure PCTCN2020114826-appb-000011
比特;
Figure PCTCN2020114826-appb-000012
比特。
第一DCI通过SRS资源指示隐含通知SRS资源组的选择,指的是根据第一DCI的SRS资源指示是否指示了某个SRS资源组中至少一个SRS资源,来确定该SRS资源组是否被选择。第一DCI的SRS资源指示的位宽大小可以为以下方式之一:
(M 1+M 2+Λ+M N)比特;
Figure PCTCN2020114826-appb-000013
比特;
Figure PCTCN2020114826-appb-000014
比特。
其中,L max,i(i=1,2,Λ,N)表示终端在第i个天线端口组最多能支持的层数或者 基站允许该终端在第i个天线端口组最大的传输层数。L max表示终端最多能支持的层数或者基站允许该终端最大的传输层数。假设第一DCI总共指示了RI个SRS资源,且第i个SRS资源组中指示了RI i(i=1,2,Λ,N)个SRS资源,则第二DCI一个子带SRS资源指示的位宽大小为以下方式之一:
(M 1+M 2+Λ+M N)比特;
Figure PCTCN2020114826-appb-000015
比特;
Figure PCTCN2020114826-appb-000016
比特。
在另一实施例中,存在N个SRS资源组,且SRS资源与PTRS端口关联。SRS资源与PTRS端口的关联关系,会影响第二DCI每个子带SRS资源指示。第二DCI的子带SRS资源指示存在以下限制:上行传输信道同一层的不同上行子带关联的PTRS端口必须相同。一个资源组中的SRS资源与PTRS端口的关联关系,存在以下两种情况:
一个SRS资源组的不同SRS资源可能关联不同的PTRS端口;
一个SRS资源组的所有SRS资源只能关联相同的PTRS端口。
第二DCI的子带SRS资源指示,可以采取如下方式之一指示在不同SRS资源组的SRS资源选择:
多个子带SRS资源指示在同一个资源组选择的SRS资源个数必须相同;
多个子带SRS资源指示在同一个资源组选择的SRS资源个数可以不同。
一个SRS资源组的不同SRS资源可能关联不同的PTRS端口,且多个子带SRS资源指示在同一个资源组选择的SRS资源个数必须相同。一个具体的例子是,假设存在两个SRS资源组,且上行传输信道的PTRS端口选择和上行传输信道的层数通过第一DCI的SRS资源指示确定。上行传输信道同一层的不同上行子带关联的PTRS端口必须相同。每个SRS资源组包含4个SRS资源。第1个SRS资源组的第1、2个SRS资源关联PTRS端口0;第1个SRS资源组的第3、4个SRS资源关联PTRS端口1;第2个SRS资源组的第1、2个SRS资源关联PTRS端口2;第2个SRS资源组的第3、4个SRS资源关联PTRS端口3。关于第一DCI在SRS资源指示和第二DCI的子带SRS资源指示,例如:
1)第一DCI的SRS资源指示为:10000001,表示上行传输信道的层数为2,第1层上行传输关联PTRS端口0,第2层上行传输关联PTRS端口3。因为上行传输信道同一层的不同上行子带关联的PTRS端口必须相同。因此,第1层的子带SRS资源指示,只能从第1个SRS资源组的第1、2个SRS资源中选择一个;第2层的子带SRS资源指示,只能从第2个SRS资源组的第3、4个SRS资源中选择一个。这种情况下,每一个子带SRS资源指示的位宽只需2比特。
2)第一DCI的SRS资源指示为:11001001,表示上行传输信道的层数为4,第1、2层上行传输关联PTRS端口0,第3层上行传输关联PTRS端口2,第4层上行传输关联PTRS端口3。因为上行传输信道同一层的不同上行子带关联的PTRS端口必须相同。因此,子带SRS不再包括第1个SRS资源组的选择;第3层的子带SRS资源指示,可以从第2个SRS资源组的第1、2个SRS资源中选择一个;第4层的子带SRS资源指示,可以从第2个SRS资源组的第3、4个SRS资源中选择一个。这种情况下,每一个子带SRS资源指示的位宽只需2比特。
3)第一DCI的SRS资源指示为:11111111,表示上行传输信道的层数为8,选择了所有SRS资源,则不存在第二DCI。
4)第一DCI的SRS资源指示为:11000000/00110000,表示上行传输信道的层数为2,且没有选择第2个SRS资源组。因为上行传输信道同一层的不同上行子带关联的PTRS端口必须相同。此时,不存在第二DCI。
5)第一DCI的SRS资源指示为:00001100/00000011,表示上行传输信道的层数为2,且没有选择第1个SRS资源组。因为上行传输信道同一层的不同上行子带关联的PTRS端口必须相同。此时,不存在第二DCI。
6)第一DCI的SRS资源指示为:11100000,表示上行传输信道的层数为3,且没有选择第2个SRS资源组。因为上行传输信道同一层的不同上行子带关联的PTRS端口必须相同。第3层的子带SRS资源指示,只能从第1个SRS资源组的第3、4个SRS资源中选择一个。此时,每一个子带SRS资源指示只需1比特。
7)第一DCI的SRS资源指示为:11110000/11001100/11000011/00111100/00110011/00001111,表示上行传输信道的层数为4,因为第二DCI每一个子带SRS资源指示,对应于上行传输信道的同一层的SRS资源指示,如果位于同一个SRS资源组,则必须关联相同的PTRS端口。此时,不存在第二DCI。
一个SRS资源组的不同SRS资源只能关联相同的PTRS端口,且多个子带 SRS资源指示在同一个资源组选择的SRS资源个数必须相同。一个具体的例子是,假设存在两个SRS资源组,且上行传输信道的PTRS端口选择和上行传输信道的层数通过第一DCI的SRS资源指示确定。每个SRS资源组包含4个SRS资源。上行传输信道同一层的不同上行子带关联的PTRS端口必须相同。第1个SRS资源组的所有SRS资源关联PTRS端口0;第2个SRS资源组的所有SRS资源关联PTRS端口1。关于第一DCI在SRS资源指示和第二DCI的子带SRS资源指示,例如:
1)第一DCI的SRS资源指示为:10000001,表示上行传输信道的层数为2,第1层上行传输关联PTRS端口0,第2层上行传输关联PTRS端口1。第1层的子带SRS资源指示,只能从第1个SRS资源组中选择一个;第2层的子带SRS资源指示,只能从第2个SRS资源组中选择一个。
2)第一DCI的SRS资源指示为:11001001,表示上行传输信道的层数为4,第1、2层上行传输关联PTRS端口0,第3、4层上行传输关联PTRS端口1。第1、2层的子带SRS资源指示,只能从第1个SRS资源组中选择2个;第3、4层的子带SRS资源指示,只能从第2个SRS资源组中选择2个。
3)第一DCI的SRS资源指示为:11111111,表示上行传输信道的层数为8,选择了所有SRS资源,则不存在第二DCI。
4)第一DCI的SRS资源指示为:11110000/00001111,表示上行传输信道的层数为4。此时不存在第二DCI。
一个SRS资源组的不同SRS资源只能关联相同的PTRS端口,且多个子带SRS资源指示在同一个资源组选择的SRS资源个数可以不同。一个具体的例子是,假设存在两个SRS资源组,且上行传输信道的PTRS端口选择通过第一DCI中的SRS资源指示和第二个子带SRS资源指示共同确定。每个SRS资源组包含4个SRS资源。第1个SRS资源组的所有SRS资源关联PTRS端口0;第2个SRS资源组的所有SRS资源关联PTRS端口1。关于第一DCI在SRS资源指示和第二DCI的子带SRS资源指示,例如:
1)第一DCI的SRS资源指示为:10000001,表示上行传输信道的层数为2。任何一个子带SRS资源指示,都可以从8个SRS资源中任意选择2个SRS资源。实际上行传输关联的PTRS取决于传输层数及子带SRS资源指示。
2)第一DCI的SRS资源指示为:11001001,表示上行传输信道的层数为4。任何一个子带SRS资源指示,都可以从8个SRS资源中任意选择4个SRS资源。实际上行传输关联的PTRS取决于传输层数及子带SRS资源指示选择。
其余实现方法,在与其它实施方式不冲突的情况下,可以采用相同的实现 方法。
在另一实施例中,存在N个SRS资源组,其中第i个SRS资源组包含M i个SRS资源,且第一DCI指示跳频和跳频偏移量。如图6所示,图6为存在跳频的情况下,第一DCI调度的上行传输信道的频域范围示意图,上行传输信道实际占用的频域范围,由第一DCI的跳频指示、第一DCI的跳频偏移量指示和第一DCI的频域资源分配共同确定。第二DCI的上行子带编号和多个子带SRS资源指示,要根据上行传输信道实际占用的频域范围。其余实现方法,在与其它实施方式不冲突的情况下,可以采用相同的实现方法。
图7为一实施例提供的另一种上行传输方法的流程图,如图7所示,本实施例提供的方法包括如下步骤。
步骤S7010,向第一通信节点发送下行参考信号,下行参考信号用于获取下行信道信息。
本实施例提供的上行传输方法应用于无线通信系统中的第二通信节点,第二通信节点例如为基站。基站在无线通信系统中使用下行传输信道进行下行传输,并通过下行控制信令调度第二通信节点发送上行传输信道。基站通过下行传输信道向UE发送下行数据和下行信令。当基站和UE之间的上行信道和下行信道具有互易性时,即基站和UE之间的上行信道和下行信道的所经历的空间环境相同,UE可以使用基站发送下行参考信号获取的下行信道信息去发送上行传输信道。例如对于上行传输信道所使用的预编码,传统的上行传输信道采用宽带预编码,而宽带预编码的精度不足,提高上行传输的性能有限。而在基站和UE之间的上行信道和下行信道具有互易性时,本实施例考虑采用下行信道信息计算的预编码信息应用于上行传输信道。
首先,作为第二通信节点的基站向第一通信节点发送下行参考信号,下行参考信号包括下行信道信息。
步骤S7020,接收第一通信节点利用下行信道信息发送的上行参考信号。
第一通信节点在获取到下行信道信息后,基于下行信道信息计算上行传输信道的预编码信息,且缓存预编码信息。在缓存的预编码信息中选择预编码用于生成上行参考信号,并缓存预编码的选择信息。第二通信节点将接收到第一通信节点发送的上行参考信号。
步骤S7030,向第一通信节点发送下行控制信令,下行控制信令包括子带SRS资源指示。
第二通信节点在接收到第一通信节点发送的上行参考信号后,即可向第一通信节点发送下行控制信令,下行控制信令用于调度第一通信节点的上行传输 信道,下行控制信令包括子带SRS资源指示。子带SRS资源指示,用于指示上行传输信道的子带预编码,上行传输信道在某个上行子带使用的预编码,通过该上行子带对应的子带SRS资源指示确定。
步骤S7040,接收第一通信节点根据下行控制信令的调度发送的上行传输信道。
第一通信节点在监测到下行控制信令后,即可根据下行控制信令的调度发送上行传输信道。由于下行控制信令中包括子带SRS资源指示,那么第一通信节点就可以根据下行控制信令中的子带SRS资源指示确定所需传输的上行传输信道的预编码,并发送上行传输信道。那么第二通信节点将接收到第一通信节点发送的上行传输信道。
本实施例提供的上行传输方法,应用于第二通信节点,首先向第一通信节点发送下行参考信号,下行参考信号包括下行信道信息,然后接收第一通信节点利用下行信道信息发送的上行参考信号,在向第一通信节点发送下行控制信令后,下行控制信令包括子带SRS资源指示,接收第一通信节点根据下行控制信令的调度发送的上行传输信道,使得上行传输信道和下行传输信道存在互易性时,上行传输信道可以使用下行信道信息计算的预编码信息,提高了信道估计精度,有利于上行传输的增强。
本实施例所提供的上行传输方法与图1所示实施例所提供的上行传输方法分别为基站侧的处理和UE侧的处理,其中具体的实现方式已经在图1所示实施例中进行了详细说明,本实施例中不再赘述。
图8为一实施例提供的一种上行传输装置的结构示意图,本实施例提供的上行传输装置设置于第一通信节点,如图8所示,本实施例提供的上行传输装置包括:
参考信号接收模块81,设置为接收第二通信节点发送的下行参考信号,获取下行信道信息;参考信号发送模块82,设置为利用下行信道信息发送上行参考信号;监测模块83,设置为监测第二通信节点发送的下行控制信令,下行控制信令包括子带SRS资源指示;信道发送模块84,设置为根据下行控制信令的调度发送上行传输信道。
本实施例提供的上行传输装置用于实现图1所示实施例的上行传输方法,本实施例提供的上行传输装置实现原理和技术效果类似,此处不再赘述。
图9为一实施例提供的另一种上行传输装置的结构示意图,本实施例提供的上行传输装置设置于第二通信节点,如图9所示,本实施例提供的上行传输装置包括:
参考信号发送模块91,设置为向第一通信节点发送下行参考信号,下行参考信号用于获取下行信道信息;参考信号接收模块92,设置为接收第一通信节点利用下行信道信息发送的上行参考信号;信令发送模块93,设置为向第一通信节点发送下行控制信令,下行控制信令包括子带SRS资源指示;信道接收模块94,设置为接收第一通信节点根据下行控制信令的调度发送的上行传输信道。
本实施例提供的上行传输装置用于实现图7所示实施例的上行传输方法,本实施例提供的上行传输装置实现原理和技术效果类似,此处不再赘述。
图10为一实施例提供的一种上行传输系统的结构示意图,如图10所示,本实施例提供的上行传输系统包括:第一通信节点101和第二通信节点102。其中第一通信节点101包括如图8所示的上行传输装置,第二通信节点102包括如图9所示的上行传输装置。第一通信节点101例如为UE,第二通信节点102例如为基站。
图11为一实施例提供的一种终端的结构示意图,如图11所示,该终端包括处理器111、存储器112、发送器113和接收器114;终端中处理器111的数量可以是一个或多个,图11中以一个处理器111为例;终端中的处理器111和存储器112可以通过总线或其他方式连接,图11中以通过总线连接为例。
存储器112作为一种计算机可读存储介质,可设置为存储软件程序、计算机可执行程序以及模块,如本申请图1实施例中的上行传输方法对应的程序指令/模块(例如,上行传输装置中的参考信号接收模块81、参考信号发送模块82、监测模块83和信道发送模块84)。处理器111通过运行存储在存储器112中的软件程序、指令以及模块,从而实现终端至少一种功能应用以及数据处理,即实现上述的上行传输方法。
存储器112可主要包括存储程序区和存储数据区,其中,存储程序区可存储操作系统、至少一个功能所需的应用程序;存储数据区可存储根据终端的使用所创建的数据等。此外,存储器112可以包括高速随机存取存储器,还可以包括非易失性存储器,例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。
发送器113为能够将射频信号发射至空间中的模块或器件组合,例如包括射频发射机、天线以及其他器件的组合。接收器114为能够从空间中接收射频信号的模块或器件组合,例如包括射频接收机、天线以及其他器件的组合。
图12为一实施例提供的一种基站的结构示意图,如图12所示,该基站包括处理器121、存储器122、发送器123和接收器124;基站中处理器121的数量可以是一个或多个,图12中以一个处理器121为例;基站中的处理器121和 存储器122可以通过总线或其他方式连接,图12中以通过总线连接为例。
存储器122作为一种计算机可读存储介质,可设置为存储软件程序、计算机可执行程序以及模块,如本申请图7实施例中的上行传输方法对应的程序指令/模块(例如,上行传输装置中的参考信号发送模块91、参考信号接收模块92、信令发送模块93、信道接收模块94)。处理器121通过运行存储在存储器122中的软件程序、指令以及模块,从而实现基站至少一种功能应用以及数据处理,即实现上述的上行传输方法。
存储器122可主要包括存储程序区和存储数据区,其中,存储程序区可存储操作系统、至少一个功能所需的应用程序;存储数据区可存储根据基站的使用所创建的数据等。此外,存储器122可以包括高速随机存取存储器,还可以包括非易失性存储器,例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。
发送器123为能够将射频信号发射至空间中的模块或器件组合,例如包括射频发射机、天线以及其他器件的组合。接收器124为能够从空间中接收射频信号的模块或器件组合,例如包括射频接收机、天线以及其他器件的组合。
本申请实施例还提供一种包含计算机可执行指令的存储介质,计算机可执行指令在由计算机处理器执行时用于执行一种上行传输方法,该方法包括:接收第二通信节点发送的下行参考信号,获取下行信道信息;利用下行信道信息发送上行参考信号;监测第二通信节点发送的下行控制信令,下行控制信令包括子带SRS资源指示;根据下行控制信令的调度发送上行传输信道。
本申请实施例还提供一种包含计算机可执行指令的存储介质,计算机可执行指令在由计算机处理器执行时用于执行一种上行传输方法,该方法包括:向第一通信节点发送下行参考信号,下行参考信号用于获取下行信道信息;接收第一通信节点利用下行信道信息发送的上行参考信号;向第一通信节点发送下行控制信令,下行控制信令包括子带SRS资源指示;接收第一通信节点根据下行控制信令的调度发送的上行传输信道。
以上仅为本申请的示例性实施例而已,并非用于限定本申请的保护范围。
本领域内的技术人员应明白,术语用户终端涵盖任何适合类型的无线用户设备,例如移动电话、便携数据处理装置、便携网络浏览器或车载移动台。
一般来说,本申请的多种实施例可以在硬件或专用电路、软件、逻辑或其任何组合中实现。例如,一些方面可以被实现在硬件中,而其它方面可以被实现在可以被控制器、微处理器或其它计算装置执行的固件或软件中,尽管本申请不限于此。
本申请的实施例可以通过移动装置的数据处理器执行计算机程序指令来实现,例如在处理器实体中,或者通过硬件,或者通过软件和硬件的组合。计算机程序指令可以是汇编指令、指令集架构(Instruction Set Architecture,ISA)指令、机器指令、机器相关指令、微代码、固件指令、状态设置数据、或者以一种或多种编程语言的任意组合编写的源代码或目标代码。
本申请附图中的任何逻辑流程的框图可以表示程序步骤,或者可以表示相互连接的逻辑电路、模块和功能,或者可以表示程序步骤与逻辑电路、模块和功能的组合。计算机程序可以存储在存储器上。存储器可以具有任何适合于本地技术环境的类型并且可以使用任何适合的数据存储技术实现,例如但不限于只读存储器(Read-Only Memory,ROM)、随机访问存储器(Random Access Memory,RAM)、光存储器装置和系统(数码多功能光碟(Digital Video Disc,DVD)或光盘(Compact Disc,CD))等。计算机可读介质可以包括非瞬时性存储介质。数据处理器可以是任何适合于本地技术环境的类型,例如但不限于通用计算机、专用计算机、微处理器、数字信号处理器(Digital Signal Processing,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、可编程逻辑器件(Field-Programmable Gate Array,FPGA)以及基于多核处理器架构的处理器。

Claims (18)

  1. 一种上行传输方法,应用于第一通信节点,包括:
    接收第二通信节点发送的下行参考信号,以及获取下行信道信息;
    利用所述下行信道信息发送上行参考信号;
    监测所述第二通信节点发送的下行控制信令,所述下行控制信令包括子带探测参考信号SRS资源指示;
    根据所述下行控制信令的调度发送上行传输信道。
  2. 根据权利要求1所述的方法,其中,所述上行参考信号包括N个SRS资源组,第i个SRS资源组包括M i个SRS资源,其中,每个SRS资源组与一个下行参考信号关联,i、N和M i为大于或等于1的整数,以及1≤i≤N。
  3. 根据权利要求1所述的方法,其中,所述利用所述下行信道信息发送上行参考信号,包括:
    根据所述下行信道信息确定所述上行参考信号每一个上行子带的预编码;
    根据所述上行参考信号每一个上行子带的预编码生成所述上行参考信号并发送所述上行参考信号。
  4. 根据权利要求3所述的方法,其中,所述上行子带的划分方式,包括以下至少一种方法:
    根据所述上行传输信道所在载波分量的带宽和子带划分粒度大小划分;
    根据所述上行传输信道所在部分带宽BWP的频域范围和子带划分粒度大小划分;
    根据SRS资源的频域范围和子带划分粒度大小划分。
  5. 根据权利要求1~4中任一项所述的方法,其中,所述下行控制信令包括以下任一种方式:
    一个调度上行传输信道的下行控制信息DCI;
    两个独立调度上行传输信道的DCI;
    两个联合调度上行传输信道的DCI。
  6. 根据权利要求5所述的方法,其中,所述一个调度上行传输信道的DCI包含所述子带SRS资源指示。
  7. 根据权利要求5所述的方法,其中,所述两个独立调度上行传输信道的DCI指示的频域范围不重叠,且所述两个独立调度上行传输信道的DCI均包含所述子带SRS资源指示。
  8. 根据权利要求5所述的方法,其中,所述两个联合调度上行传输信道的DCI包括第一DCI和第二DCI,所述第一DCI和所述第二DCI共同调度所述上行传输信道。
  9. 根据权利要求8所述的方法,其中,所述第一DCI包括以下信息至少之一:载波指示、BWP指示、频域资源分配、时域资源分配、跳频指示、跳频偏移量指示、调制编码方式、冗余版本、进程号、SRS资源指示、SRS资源组指示、传输层数指示、解调参考信号DMRS端口指示、DMRS序列初始化指示、所述第二DCI的大小指示;
    所述第二DCI包括以下信息至少之一:上行子带编号、多个子带SRS资源指示、调制编码方式、冗余版本、冗余版本偏移量、DMRS序列初始化指示、DMRS序列初始化的偏移量指示。
  10. 根据权利要求9所述的方法,其中,所述第二DCI的信息比特大小通过以下方式至少之一确定:所述第一DCI的第二DCI的大小指示、SRS资源与相位追踪参考信号PTRS端口的关联关系、SRS资源组个数、每个SRS资源组包含的SRS资源个数,SRS资源组的选择、每个上行子带包含的SRS资源个数、所述第一DCI的跳频指示、所述第一DCI的跳频偏移量指示、所述第一DCI的SRS资源指示、所述第一DCI的频域资源分配。
  11. 根据权利要求9所述的方法,其中,所述第二DCI的上行子带编号和多个子带SRS资源指示的关系,包括以下方式至少之一:
    所述第二DCI包含所述多个子带SRS资源指示,且不包含所述上行子带编号;
    所述第二DCI包含所述上行子带编号和所述多个子带SRS资源指示,其中,一个上行子带编号对应一个子带SRS资源指示;
    所述第二DCI包含所述上行子带编号和所述多个子带SRS资源指示,其中,一组上行子带编号对应一个子带SRS资源指示。
  12. 根据权利要求8所述的方法,其中,所述上行传输信道的层数由以下信息至少之一确定:所述第一DCI的SRS资源指示、所述第一DCI的传输层数指示、所述第一DCI的DMRS端口指示、所述第二DCI的多个子带SRS资源指示。
  13. 根据权利要求8所述的方法,其中,所述根据所述下行控制信令的调度发送上行传输信道,包括:
    在未监测到所述第二DCI的情况下,根据所述第一DCI调度所述上行传输信道;
    在监测到所述第二DCI的情况下,根据所述第一DCI和所述第二DCI联合调度所述上行传输信道。
  14. 根据权利要求1-4中任一项所述的方法,其中,所述子带SRS资源指示用于指示所述上行传输信道的预编码,所述上行传输信道在每个上行子带使用的预编码通过每个上行子带对应的子带SRS资源指示和所述上行参考信号每一个上行子带的预编码共同确定。
  15. 一种上行传输方法,应用于第二通信节点,包括:
    向第一通信节点发送下行参考信号,所述下行参考信号用于获取下行信道信息;
    接收所述第一通信节点利用所述下行信道信息发送的上行参考信号;
    向所述第一通信节点发送下行控制信令,所述下行控制信令包括子带探测参考信号SRS资源指示;
    接收所述第一通信节点根据所述下行控制信令的调度发送的上行传输信道。
  16. 根据权利要求15所述的方法,其中,所述接收所述第一通信节点利用所述下行信道信息发送的上行参考信号,包括:
    接收所述第一通信节点根据所述下行信道信息确定所述上行参考信号每一个上行子带的预编码后,根据所述上行参考信号每一个上行子带的预编码生成并发送的所述上行参考信号。
  17. 根据权利要求16所述的方法,其中,所述上行子带的划分方式,包括以下至少一种方法:
    根据所述上行传输信道所在载波分量的带宽和子带划分粒度大小划分;
    根据所述上行传输信道所在部分带宽BWP的频域范围和子带划分粒度大小划分;
    根据SRS资源的频域范围和子带划分粒度大小划分。
  18. 一种上行传输装置,包括处理器和存储器,所述处理器用于运行储存在所述存储器里的程序指令以执行根据权利要求1-17中任意一项所述的上行传输方法。
PCT/CN2020/114826 2019-09-12 2020-09-11 上行传输方法和装置 Ceased WO2021047647A1 (zh)

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