WO2014086313A1 - Procédé et dispositif de transmission de signaux de référence d'informations d'état de canal - Google Patents

Procédé et dispositif de transmission de signaux de référence d'informations d'état de canal Download PDF

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Publication number
WO2014086313A1
WO2014086313A1 PCT/CN2013/088752 CN2013088752W WO2014086313A1 WO 2014086313 A1 WO2014086313 A1 WO 2014086313A1 CN 2013088752 W CN2013088752 W CN 2013088752W WO 2014086313 A1 WO2014086313 A1 WO 2014086313A1
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Prior art keywords
csi
configuration information
types
zero
compressed
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PCT/CN2013/088752
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English (en)
Chinese (zh)
Inventor
司倩倩
林亚男
沈祖康
高雪娟
潘学明
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电信科学技术研究院
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Publication of WO2014086313A1 publication Critical patent/WO2014086313A1/fr

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Classifications

    • 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
    • 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), DMT
    • 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
    • H04L5/0066—Requirements on out-of-channel emissions

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method and a device for transmitting a channel state information reference signal.
  • TDD time division duplex
  • a radio frame In a Long Term Evolution (LTE) system, a radio frame has a length of 10 ms, and a subframe has a length of 1 ms, that is, a radio frame contains 10 subframes.
  • TD time division
  • seven TDD uplink and downlink configurations are currently defined in units of one radio frame, as shown in Table 1, where D represents a downlink subframe, U represents an uplink subframe, and S represents a special sub-frame in the TDD system.
  • the frame and the special subframe include three areas: a Downlink Pilot Time Slot (DwPTS), a Guard Period (GP), and an Uplink Pilot Time Slot (UpPTS), where DwPTS is used.
  • DwPTS Downlink Pilot Time Slot
  • GP Guard Period
  • UpPTS Uplink Pilot Time Slot
  • the GP is a guard interval, and is generally defined according to a downlink-to-uplink handover time, an uplink-to-downlink handover time, and a transmission delay associated with the cell radius, to avoid the same
  • the overlapping interference between the uplink and the downlink on the carrier, and the UpPTS is used to transmit the uplink random access signal and the uplink sounding signal.
  • Table 1 currently defines 10 special subframe configurations for different application scenarios, as shown in Table 2, where T s is the system sampling time interval, based on 1 subframe corresponding to 30720T S definition.
  • T s is the system sampling time interval, based on 1 subframe corresponding to 30720T S definition.
  • the subframe structure of different special subframe configurations is shown in Figure 2a - Figure 2b.
  • CP normal cyclic prefix
  • a special subframe contains 14 symbols, as shown in Figure 2a, the downlink subframe.
  • a special subframe contains 12 symbols, as shown in Figure 2b.
  • the channel state information reference signal (CSI-RS) transmitted by the network side is used for the measurement of modes 9 and 10. It is a dedicated pilot of the user equipment (User Equipment, UE, also called terminal), that is, the CSI seen by different UEs.
  • the pilots can be different, including the pilot pattern, period, starting position and power. Therefore, one cell may be configured with multiple CSI-RSs, and one UE may also have multiple CSI-RS configurations on one cell.
  • the location of the CSI-RS is usually configured in the neighboring cell, and the region is configured with a zero-power CSI-RS.
  • the CSI-RS sequence is defined as:
  • s is the slot number within a radio frame
  • 1 is orthogonal frequency division multiplexing within a slot (Orthogonal Frequency Division Multiplexing, OFDM)
  • OFDM Orthogonal Frequency Division Multiplexing
  • the pilot sequence (called the pilot that will be mapped on the complex symbol as the antenna port p:
  • the CSI-RS only when the regular CP and the extended CP satisfy the conditions of the above two tables respectively
  • the downlink subframe transmitted in the slot and simultaneously transmitting the CSI-RS shall satisfy the table 6.10.0.5-1 in the protocol 36.211.
  • the terminal assumes that the CSI-RS is not transmitted on the special subframe of the TDD system, or that the CSI-RS and the synchronization signal, the Physical Broadcast Channel (PBCH), and the System Information Format Type 1 message (SystemlnformatKHiBlockTypel messages) are crying.
  • the subframe does not transmit the CSI-RS, or the CSI-RS is not transmitted in the subframe in which the paging information is configured.
  • each bit corresponds to a 4-port CSI pilot configuration number
  • the first bit on the left corresponds to the lowest number of the 4-port CSI pilot configuration.
  • NCT New Carrier Type, defined in LTE Rel-11
  • PDCH physical downlink control channel
  • EPDCCH enhanced physical downlink control channel
  • US UE-specific reference signals
  • the length of the DwPTS is 3 OFDM symbols, it can be used to transmit the PDCCH and the synchronization signal.
  • the PDCCH transmitted at this time is mainly used for uplink scheduling signaling (UL DCI), and is not used for the physical downlink shared channel (PDSCH).
  • UL DCI uplink scheduling signaling
  • PDSCH physical downlink shared channel
  • the DwPTS in the downlink subframes 1 and 6 has no PDCCH transmission, and does not support PDSCH transmission, which causes waste of resources.
  • the CSI reference signal may collide with the control channel, the synchronization channel, or the broadcast channel, so the UE will assume that no CSI reference signal is transmitted in a specific subframe.
  • the protocol clearly states that in the following types of subframes, the UE will assume that no CSI reference signal is transmitted:
  • a subframe that may collide with a broadcast channel, a synchronization signal, or a system information block type 1 information
  • the number of downlink subframes available for CSI reference signal transmission is much less than that of FDD systems.
  • all subframes can be used for CSI reference signal transmission.
  • only a small number of subframes are available, which limits the flexibility of the CSI reference signal in the TDD system.
  • the TDD uplink and downlink configuration 0 is the most frequently used configuration. For example, for a cell with a lower load, it is more reasonable to choose to use TDD uplink and downlink configuration 0, because the number of downlink subframe transmissions is small, which can save more energy.
  • TDD uplink and downlink configuration 0 only subframes 0 and 5 can support the transmission of CSI reference signals, and the broadcast channel and the secondary synchronization signal are transmitted in subframe 0 in each radio frame, so it can be used.
  • the CSI reference signal configuration is more limited.
  • the SIB1 information is transmitted in a period of 20 milliseconds, and the secondary synchronization signal is in every radio frame.
  • Transmission, while paging information may also be transmitted in subframes 0 and 5 in each radio frame of the TDD, which further limits the available CSI-RS configuration.
  • the UE may be configured with multiple CSI reference signal processes, each of which has independent non-zero power CSI reference signal configuration, zero-power CSI reference signal configuration, and interference measurement resource configuration. These are all based on the available CSI reference signal configuration, so the CSI reference signal configuration in this scenario is also very limited.
  • CSI reference signal configuration in this scenario is also very limited.
  • a CSI-RS transmission method comprising:
  • the network side determines the configuration information used by the CSI-RS to transmit; the configuration information indicates that the network side transmits the CSI-RS by using a compressed CSI-RS structure; and all CSI-RSs in the compressed CSI-RS structure are in the downlink subframe. Or transmitting in a resource unit (RE) in the first X OFDM symbols in the downlink slot, where X is a positive integer not greater than 3; the network side sends the corresponding CSI-RS to the terminal according to the determined configuration information.
  • RE resource unit
  • the network side sends the CS I-RS in the REs in the first X OFDM symbols in the downlink subframe or the downlink slot, where X is a positive integer not greater than 3, and the method is visible.
  • a scheme of transmitting CS I-RS in the first X OFDM symbols in a downlink subframe or a downlink slot is implemented. This scheme realizes the enhancement of the CS I reference signal and can solve the problem that the CS I reference signal configuration is limited.
  • the scheme is applied to the TDD guard band and the carrier of the NCT, the first X OFDM symbols of the subframe can be fully utilized, thereby reducing the waste of time-frequency resources. It should be noted that the technical solution provided by the embodiments of the present invention is applicable not only to the TDD system but also to the FDD system.
  • the CSI-RS resource corresponding to each CSI-RS port is composed of Y time-domain neighboring or frequency-domain adjacent REs, where Y is a positive integer greater than one; ,
  • the CSI-RS resource For the CSI-RS resource corresponding to each CSI-RS port, the CSI-RS resource is multiplexed by the CSI-RS of the Y CSI-RS ports at most.
  • the CSI-RS configuration information and the zero-power CSI-RS configuration information included in the configuration information include parameters /' and mod(, 2);
  • the value of / ' and mod( , 2) is 0, where is the number of the slot in which the CSI-RS resource is located, and /' is the number of the first OFDM symbol occupied by the CSI-RS resource in the slot.
  • the number of types corresponding to the CSI-RS configuration included in the configuration information is not less than P, and P is the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure;
  • the number of bits occupied by the zero-power CSI-RS configuration information included in the above configuration information is not less than ⁇ , and K is the number of types of zero-power CSI-RS configurations corresponding to the compressed CSI-RS structure.
  • the number of types corresponding to the CSI-RS configuration included in the configuration information is not less than M, and M is the number of types of CSI-RS configurations defined in the LTE-A system protocol and the corresponding compressed CSI- The sum of the number of types of CSI-RS configurations of the RS structure;
  • the number of bits occupied by the zero-power CSI-RS configuration information included in the foregoing configuration information is not less than N, where N is the number of types of zero-power CSI-RS configurations defined in the LTE-A system protocol and zero power of the corresponding compressed CSI-RS structure. The sum of the number of types of CSI-RS configurations.
  • a CSI-RS transmission method comprising:
  • the terminal determines the configuration information used by the network side to send the CSI-RS; the configuration information indicates that the network side transmits the CSI-RS by using the compressed CSI-RS structure; and all the CSI-RSs in the compressed CSI-RS structure are in the downlink subframe or the downlink Transmitted in REs in the first X OFDM symbols in the slot, where X is a positive integer not greater than 3;
  • the terminal receives the CSI-RS sent by the network side according to the determined configuration information.
  • the terminal receives the CSI-RS on the RE in the first X OFDM symbols in the downlink subframe or the downlink time slot, where X is a positive integer not greater than 3, and the method is implemented.
  • This scheme implements an enhancement of the CSI reference signal and can solve the problem that the CS I reference signal configuration is limited.
  • the first X 0FDM symbols of the subframe can be fully utilized, thereby reducing the waste of time-frequency resources. It should be noted that the technical solution provided by the embodiment of the present invention is applicable not only to the TDD system but also to the FDD system.
  • the CSI-RS resource corresponding to each CSI-RS port is composed of Y time-domain neighboring or frequency-domain adjacent REs, where Y is a positive integer greater than one; ,
  • the CSI-RS resource For the CSI-RS resource corresponding to each CSI-RS port, the CSI-RS resource is multiplexed by the CSI-RS of the Y CSI-RS ports at most.
  • the CSI-RS configuration information and the zero-power CSI-RS configuration information included in the configuration information include parameters /' and mod(n s , 2);
  • the value of / ' and mod( , 2) is 0, where is the number of the slot in which the CSI-RS resource is located, and /' is the number of the first OFDM symbol occupied by the CSI-RS resource in the slot.
  • the configuration information includes a CSI-RS configuration corresponding to the method according to any one of the foregoing terminal side methods.
  • the number of types is not less than P, where P is the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure; the number of bits occupied by the zero-power CSI-RS configuration information included in the configuration information is not less than ⁇ , and K is the corresponding compressed CSI- The number of types of zero-power CSI-RS configurations for the RS structure.
  • the number of types corresponding to the CSI-RS configuration included in the configuration information is not less than M, and M is the number of types of CSI-RS configurations defined in the LTE-A system protocol and corresponding to the foregoing method.
  • M is the number of types of CSI-RS configurations defined in the LTE-A system protocol and corresponding to the foregoing method. The sum of the number of types of CSI-RS configurations of the compressed CSI-RS structure;
  • the number of bits occupied by the zero-power CSI-RS configuration information included in the foregoing configuration information is not less than N, where N is the number of types of zero-power CSI-RS configurations defined in the LTE-A system protocol and zero power of the corresponding compressed CSI-RS structure. The sum of the number of types of CSI-RS configurations.
  • a base station comprising:
  • a determining unit configured to determine configuration information used by the CSI-RS to transmit; the configuration information indicates that the network side transmits the CSI-RS by using a compressed CSI-RS structure; all CSI-RSs in the compressed CSI-RS structure are in a downlink subframe or Transmitted in resource elements in the first X OFDM symbols in the downlink slot, where X is a positive integer not greater than 3;
  • a sending unit configured to send the corresponding CSI-RS to the terminal according to the determined configuration information.
  • the base station provided by the embodiment of the present invention sends in the RE in the first X OFDM symbols in the downlink subframe or the downlink slot.
  • the base station provided by the embodiment of the present invention implements a scheme of transmitting CSI-RS in the first X OFDM symbols in a downlink subframe or a downlink slot.
  • This scheme realizes the enhancement of the CS I reference signal and can solve the problem that the CSI reference signal configuration is limited.
  • the scheme is applied to the time division duplex TDD protection band and the new type NCT carrier, the first X OFDM symbols of the subframe can be fully utilized, thereby reducing the waste of time-frequency resources.
  • the technical solution provided by the embodiment of the present invention is applicable not only to the TDD system but also to the FDD system.
  • the CSI-RS resources corresponding to each CSI-RS port are composed of Y time-domain neighboring or frequency-domain neighboring REs, where Y is a positive integer greater than 1; and,
  • the CSI-RS resource For the CSI-RS resource corresponding to each CSI-RS port, the CSI-RS resource is multiplexed by the CSI-RS of the Y CSI-RS ports at most.
  • the CSI-RS configuration information and the zero-power CSI-RS configuration information included in the configuration information determined by the determining unit respectively include parameters ⁇ and mod(n s , 2);
  • the value of / ' and mod( , 2) is 0, where is the number of the slot in which the CSI-RS resource is located, and /' is the number of the first OFDM symbol occupied by the CSI-RS resource in the slot.
  • the number of types corresponding to the CSI-RS configuration included in the configuration information determined by the determining unit is not less than P, and P is the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure;
  • the number of bits occupied by the zero-power CSI-RS configuration information included in the configuration information determined by the determining unit is not less than K, K is the number of types of zero-power CSI-RS configurations corresponding to the compressed CSI-RS structure.
  • the number of types corresponding to the CSI-RS configuration included in the configuration information determined by the determining unit is not less than M, and M is the number of types of CSI-RS configurations defined in the LTE-A system protocol.
  • M is the number of types of CSI-RS configurations defined in the LTE-A system protocol. The sum of the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure;
  • the number of bits occupied by the zero-power CSI-RS configuration information included in the configuration information determined by the determining unit is not less than
  • N is the sum of the number of types of zero-power CSI-RS configurations defined in the LTE-A system protocol and the number of types of zero-power CSI-RS configurations corresponding to the compressed CSI-RS structure.
  • a base station includes a processor and a radio unit.
  • the processor is configured to determine configuration information used by the CSI-RS to transmit; the configuration information indicates that the network side transmits the CSI-RS by using a compressed CSI-RS structure; and all CSI-RSs in the compressed CSI-RS structure are in the downlink Transmitted in resource elements within the first X OFDM symbols in a frame or downlink time slot, where X is a positive integer not greater than 3; the radio frequency unit is configured to transmit a corresponding CSI-RS to the terminal according to the determined configuration information.
  • the base station provided by the embodiment of the present invention sends a CS I-RS in a RE in a first X OFDM symbol in a downlink subframe or a downlink time slot, where X is a positive integer of not more than 3, which is visible in the embodiment of the present invention.
  • the base station implements a scheme of transmitting CSI-RSs in the first X OFDM symbols in a downlink subframe or a downlink slot. This scheme realizes the enhancement of the CS I reference signal and can solve the problem that the CSI reference signal configuration is limited.
  • the scheme is applied to the time division duplex TDD protection band and the new type NCT carrier, the first X OFDM symbols of the subframe can be fully utilized, thereby reducing the waste of time-frequency resources.
  • the technical solution provided by the embodiment of the present invention is applicable not only to the TDD system but also to the FDD system.
  • a terminal comprising:
  • a determining unit configured to determine configuration information used by the network side to send the CSI-RS; the configuration information indicates that the network side transmits the CSI-RS by using a compressed CSI-RS structure; and all the CSI-RSs in the compressed CSI-RS structure are in the downlink And transmitting in the resource unit in the first X OFDM symbols in the frame or the downlink time slot, where X is a positive integer not greater than 3; and receiving unit, configured to receive the CSI-RS sent by the network side according to the determined configuration information.
  • the terminal provided by the embodiment of the present invention receives the RE in the first X OFDM symbols in the downlink subframe or the downlink slot.
  • the terminal provided by the embodiment of the present invention implements a scheme for transmitting CSI-RS in the first X OFDM symbols in a downlink subframe or a downlink slot.
  • This scheme realizes the enhancement of the CS I reference signal and can solve the problem that the CSI reference signal configuration is limited.
  • the scheme is applied to the time division duplex TDD protection band and the new type NCT carrier, the first X OFDM symbols of the subframe can be fully utilized, thereby reducing the waste of time-frequency resources.
  • the technical solution provided by the embodiment of the present invention is applicable not only to the TDD system but also to the FDD system.
  • the CSI-RS resources corresponding to each CSI-RS port are adjacent or frequency-transmitted by Y time domains.
  • Domain adjacent RE Composition where Y is a positive integer greater than one;
  • the CSI-RS resource For a CSI-RS resource corresponding to each CSI-RS port, the CSI-RS resource is multiplexed by at most CSI-RS ports of the CSI-RS port.
  • the CSI-RS configuration information and the zero-power CSI-RS configuration information included in the configuration information determined by the determining unit respectively include parameters /' and mod(, 2);
  • the value of / ' and mod( , 2) is 0, where is the number of the slot in which the CSI-RS resource is located, and /' is the number of the first OFDM symbol occupied by the CSI-RS resource in the slot.
  • the number of types corresponding to the CSI-RS configuration included in the configuration information determined by the determining unit is not less than P, and P is the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure;
  • the number of bits occupied by the zero-power CSI-RS configuration information included in the configuration information determined by the determining unit is not less than
  • ⁇ , K is the number of types of zero-power CSI-RS configurations corresponding to the compressed CSI-RS structure.
  • the number of types corresponding to the CSI-RS configuration included in the configuration information determined by the determining unit is not less than M, and M is the number of types of CSI-RS configurations defined in the LTE-A system protocol.
  • M is the number of types of CSI-RS configurations defined in the LTE-A system protocol. The sum of the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure;
  • the number of bits occupied by the zero-power CSI-RS configuration information included in the configuration information determined by the determining unit is not less than
  • N is the sum of the number of types of zero-power CS I-RS configurations defined in the LTE-A system protocol and the number of types of zero-power CS I-RS configurations corresponding to the compressed CSI-RS structure.
  • a terminal comprising a processor and a radio unit.
  • the processor is configured to determine configuration information used by the network side to send the CSI-RS; the configuration information indicates that the network side transmits the CSI-RS by using a compressed CSI-RS structure; and all CSI-RSs in the compressed CSI-RS structure are in the downlink
  • the resource elements in the first X OFDM symbols in the subframe or downlink time slot are transmitted, where X is a positive integer not greater than 3; the radio frequency unit is configured to receive the CSI-RS transmitted by the network side according to the determined configuration information.
  • the terminal receives the CS I-RS on the RE in the first X OFDM symbols in the downlink subframe or the downlink time slot, where X is a positive integer of not more than 3, which is visible in the embodiment of the present invention.
  • the terminal implements a scheme of transmitting CSI-RS in the first X OFDM symbols in the downlink subframe or the downlink slot.
  • the scheme implements an enhancement of the CS I reference signal and can solve the problem that the CSI reference signal configuration is limited.
  • the first X OFDM symbols of the subframe can be fully utilized, thereby reducing the waste of time-frequency resources.
  • FIG. 1 is a schematic diagram of uplink and downlink interference between TDD systems in the prior art
  • FIG. 2a is a schematic structural diagram of a special subframe configuration in a downlink conventional CP in the prior art
  • 2b is a schematic structural diagram of a special subframe configuration in a downlink CP in the prior art
  • FIG. 3 is a schematic flowchart of a method according to an embodiment of the present disclosure.
  • 5a-5u are schematic diagrams showing a CSI-RS transmission pattern in an embodiment of the present invention.
  • 6a-6u are schematic diagrams showing a CSI-RS transmission pattern according to another embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION
  • the waste of time-frequency resources is reduced, and the problem of limited CSI reference signal configuration is solved.
  • the method for transmitting CSI-RS provided by the network side includes the following steps: Step 30: The network side determines configuration information used for sending the CSI-RS; the configuration information indicates that the network side adopts compressed CSI-
  • the RS structure transmits a CSI-RS; all CSI-RSs in the compressed CSI-RS structure are in resource elements (RE) in the first X orthogonal frequency division multiplexing (OFDM) symbols in the downlink subframe or the downlink slot Transmission, where X is a positive integer not greater than 3;
  • RE resource elements
  • OFDM orthogonal frequency division multiplexing
  • Step 31 The network side sends a corresponding CSI-RS to the terminal according to the determined configuration information.
  • a CSI-RS resource corresponding to each CSI-RS port is composed of Y time-domain neighboring or frequency-domain adjacent REs, where Y is a positive integer greater than 1; and, for each The CSI-RS resource corresponding to the CSI-RS port, and the CSI-RS resource is multiplexed by the CSI-RS of the Y CSI-RS ports at most.
  • the above configuration information includes CSI-RS configuration information and zero-power CSI-RS configuration information, including parameters /' and mod(n s , 2); /, and mod( , 2) have a value of 0, where 3 ⁇ 4 is CSI - the number of the slot in which the RS resource is located, /' is the number of the first OFDM symbol occupied by the CSI-RS resource in the slot.
  • the number of types corresponding to the CSI-RS configuration included in the configuration information is not less than P, where P is the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure; and the bits occupied by the zero-power CSI-RS configuration information included in the configuration information.
  • the number is not less than ⁇ , and K is the number of types of zero-power CSI-RS configurations corresponding to the compressed CSI-RS structure; or
  • the number of types corresponding to the CSI-RS configuration included in the configuration information is not less than M, where M is the number of types of CSI-RS configurations defined in the LTE-A system protocol and the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure.
  • M is the number of types of CSI-RS configurations defined in the LTE-A system protocol and the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure.
  • the number of bits occupied by the zero-power CSI-RS configuration information included in the foregoing configuration information is not less than N, where N is the number of types of zero-power CSI-RS configurations defined in the LTE-A system protocol and the corresponding compressed CSI-RS structure.
  • N is the number of types of zero-power CSI-RS configurations defined in the LTE-A system protocol and the corresponding compressed CSI-RS structure.
  • the method for transmitting a CSI-RS provided by a terminal side includes the following steps: Step 40: The terminal determines configuration information used by the network side to send a CSI-RS; the configuration information indicates that the network side adopts compressed CSI. -RS structure transmission CSI-RS; all CSI-RSs in the compressed CSI-RS structure are transmitted in REs in the first X OFDM symbols in the downlink subframe or the downlink slot, where X is a positive integer not greater than 3 ;
  • Step 41 The terminal receives the CSI-RS sent by the network side according to the determined configuration information.
  • a CSI-RS resource corresponding to each CSI-RS port is composed of Y time-domain neighboring or frequency-domain adjacent REs, where Y is a positive integer greater than 1; and, for each The CSI-RS resource corresponding to the CSI-RS port, and the CSI-RS resource is multiplexed by the CSI-RS of the Y CSI-RS ports at most.
  • the above configuration information includes CSI-RS configuration information and zero-power CSI-RS configuration information, including parameters /' and mod(n s , 2); / ' and mod(n s , 2) have values of 0, where The number of the slot in which the CSI-RS resource is located, /' is the number of the first OFDM symbol occupied by the CSI-RS resource in the slot.
  • the number of types corresponding to the CSI-RS configuration included in the configuration information is not less than P, where P is the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure; the bits occupied by the zero-power CSI-RS configuration information included in the configuration information
  • the number is not less than K, K is the number of types of zero-power CSI-RS configurations corresponding to the compressed CSI-RS structure; or
  • the number of types corresponding to the CSI-RS configuration included in the configuration information is not less than M, where M is the number of types of CSI-RS configurations defined in the LTE-A system protocol and the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure.
  • M is the number of types of CSI-RS configurations defined in the LTE-A system protocol and the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure.
  • the number of bits occupied by the zero-power CSI-RS configuration information included in the configuration information is not less than N, where N is the number of types of zero-power CSI-RS configurations defined in the LTE-A system protocol and the corresponding compressed CSI-RS structure. The sum of the number of types of zero-power CSI-RS configurations.
  • Step 1 The network side determines the port and subframe used to send the CSI-RS.
  • the port used to send the CSI-RS is port 15, and when the number of ports is 2, the CSI-RS is sent.
  • the ports used are port 15 and port 16.
  • the ports used to send CSI-RS are port 15, port 16, port 17, and port 18.
  • the CSI-RS is sent.
  • the ports used are port 15, port 16, port 17, port 18, port 19, port 20, port 21, port 22.
  • the subframe used for transmitting the CSI-RS is a downlink subframe or a special subframe.
  • Step 2 The network side determines, for each port determined, the resource unit (RE) used to send the CSI-RS to the terminal on the port, and the CSI-RS sent on each RE, and uses the port on each RE. Transmitting a corresponding CSI-RS to the terminal; where the RE used for transmitting the CSI-RS is located in the first two OFDM symbols of the subframe determined in step 30.
  • the resource unit RE
  • the RE used by CSI-RS reflects the compressed CSI-RS structure.
  • the CSI-RS may be sent to the terminal on the port according to the following formula: The RE and the CSI-RS sent on each RE: p)
  • s is the slot number, the value is 0; defined for the LTE system protocol
  • the CSI-RS sequence the values of k /, m' are determined according to the LTE system protocol, namely:
  • the RE used for transmitting the CSI-RS to the terminal on the port and the CSI-RS sent on each RE may be determined according to the following formula:
  • ⁇ takes values from odd numbers 1 to 11, and 'is 0 or 1.
  • the network side can send the configuration information of the CSI-RS transmission to the terminal according to the method defined in the prior art, that is, the LTE system protocol, and the only difference lies in the CSI-RS configuration information and the zero power included in the configuration information.
  • the CSI-RS configuration information includes parameters /' and mod( , 2) whose value is 0, where is the number of the slot in which the CSI-RS resource is located, and ⁇ is the first OFDM occupied by the CSI-RS resource in the slot. The number of the symbol.
  • the network side may send at least one of the following six CSI-RS transmission configuration information to the terminal by using high layer signaling:
  • the number of CSI-RS ports to inform the number of ports used by the CSI-RS to be sent;
  • the CSI-RS configuration information is used to notify the number of the CSI-RS configuration to be used, and each CSI-RS configuration corresponds to a value of the parameter used for determining and I (ie, the value); the CSI-RS configuration information.
  • the number of occupied bits is not less than ⁇ , which is the sum of the number of CSI-RS configurations defined in the LTE system protocol and the number of newly added CSI-RS configurations, where each bit corresponds to a CSI-RS configuration, for example, If a bit is 0, it means that the CSI-RS configuration corresponding to the bit is not used, and if it is 1, it indicates that the CSI-RS configuration corresponding to the bit is adopted;
  • the CSI-RS subframe configuration information is used to notify the subframe in which the CSI-RS is transmitted;
  • the CSI-RS subframe configuration information may include a CSI-RS transmission period and a subframe offset, and the CSI-RS transmission period is assumed to be T,
  • the frame offset is 2
  • the terminal may determine that the second subframe in each CSI-RS transmission period T is the subframe in which the CSI-RS is transmitted by the network side; the power per RE on the physical downlink shared channel (PDSCH)
  • the value is a ratio of the power value per RE of the transmitted CSI-RS to inform the transmission power of the CSI-RS;
  • the zero-power CSI-RS configuration information is used to notify the CSI-RS configuration that does not transmit the CSI-RS, that is, the number of the zero-power CSI-RS configuration; the number of bits occupied by the zero-power CSI-RS configuration information is not less than M, and M is LTE.
  • M is LTE.
  • the RS is configured to a zero-power CSI-RS configuration; when the terminal determines that the adopted CSI-RS configuration is a zero-power CSI-RS configuration, the CSI-RS is not received;
  • Zero-power CSI-RS subframe configuration information to inform the number of subframes that do not transmit CSI-RS; the terminal does not receive CSI-RS on zero-power CSI-RS subframes.
  • the network side may also send at least one of the following six CSI-RS transmission configuration information to the terminal by using high layer signaling:
  • the number of CSI-RS ports to inform the number of ports used by the CSI-RS to be sent;
  • each CSI-RS configuration information to notify the number of the CSI-RS configuration used, and each CSI-RS configuration corresponds to a value of a determined, used parameter (ie, the value of ( k ', l ');
  • the number of bits occupied by the CSI-RS configuration information is not less than P, and P is the number of newly added CSI-RS configurations; wherein each bit corresponds to a CSI-RS configuration, for example, if a certain bit is 0, The CSI-RS configuration corresponding to the bit is not used, and if it is 1, it indicates that the CSI-RS configuration corresponding to the bit is adopted;
  • the CSI-RS subframe configuration information is used to notify the subframe in which the CSI-RS is transmitted;
  • the CSI-RS subframe configuration information may include a CSI-RS transmission period and a subframe offset, and the CSI-RS transmission period is assumed to be T,
  • the frame offset is 2
  • the terminal may determine that the second subframe in each CSI-RS transmission period T is a subframe in which the CSI-RS is sent by the network side;
  • the ratio of the power value per RE on the PDSCH to the power value per RE of the transmitted CSI-RS to inform the transmission power of the CSI-RS; the terminal can determine the power value per RE of the transmission CSI-RS ?08 «1 Power value per RE / the ratio;
  • Zero-power CSI-RS configuration information to inform the number of CSI-RS configurations that do not send CSI-RS
  • the number of bits occupied by the CSI-RS configuration information is not less than K, which is the number of newly added zero-power CSI-RS configurations, where each bit corresponds to a zero-power CSI-RS configuration, for example, if a certain bit is 0.
  • the CSI-RS corresponding to the bit is configured as a non-zero-power CSI-RS configuration. If 1, the CSI-RS corresponding to the bit is configured to be a zero-power CSI-RS configuration; the terminal is determining the CSI used.
  • CSI-RS reception is not performed;
  • Zero-power CSI-RS subframe configuration information to inform the number of the subframe in which the CSI-RS is not transmitted; the terminal does not receive the CSI-RS on the zero-power CSI-RS subframe.
  • Step 3 The terminal determines a port and a subframe used by the network side to send the CSI-RS.
  • Step 4 For each port that is determined, determine the network side to use to send the CSI-RS to the terminal on the port.
  • the network side may be configured to send the CSI-used REs to the terminal and the CSI-RSs sent by the REs on the port according to the following formula:
  • 3 ⁇ 4 ' is the CSI-RS sent by the network side on the port numbered p, corresponding to the numbered subcarrier and the numbered Z OFDM symbol; is the slot number, and the value of ⁇ is 0;
  • FIG. 5a to FIG. 5c The three types of CSI-RS transmission patterns corresponding to the eight ports in Table 3 are shown in FIG. 5a to FIG. 5c, and the six types of CSI-RS transmission patterns corresponding to the four ports in Table 3 are as shown in FIG. 5d to FIG. 5i, and corresponding to Table 3
  • the 12 CSI-RS transmission patterns of the 1 or 2 ports are shown in Fig. 5j to Fig. 5u.
  • step 4 the following method may also be used to determine the network side to use to send the CSI-RS to the terminal on the port.
  • ⁇ is the CSI-RS transmitted by the network side on the port numbered p on the RE consisting of the numbered subcarrier and the OFDM symbol numbered Z; the slot number is 0;
  • Table 4 Specifically as shown in Table 4 above.
  • the three types of CSI-RS transmission patterns corresponding to the eight ports in Table 4 are shown in FIG. 6a to FIG. 6c, and the six types of CSI-RS transmission patterns corresponding to the four ports in Table 4 are as shown in FIG. 6d to FIG. 6i, and corresponding to Table 4
  • the 12 CSI-RS transmission patterns of the 1 or 2 ports are shown in Fig. 6j to Fig. 6u.
  • the terminal can receive the configuration information of the CSI-RS transmission sent by the network side in the manner defined in the prior art, that is, the LTE system protocol, and the only difference lies in the CSI-RS configuration information included in the configuration information.
  • the zero-power CSI-RS configuration information includes parameters /' and mod(n s , 2) whose value is 0, where is the number of the slot in which the CSI-RS resource is located, and /' is the CSI-RS resource in the slot. The number of the first OFDM symbol occupied.
  • the terminal may further receive at least one of the following six types of configuration information that is sent by the network side in advance through high layer signaling:
  • the number of CSI-RS ports is used to determine the number of ports used by the network side to send CSI-RSs, and the terminal determines the ports used by the network side to send CSI-RSs according to the number of CSI-RS ports;
  • the CSI-RS configuration information is used to determine the number of the CSI-RS configuration used by the network side, and each CSI-RS configuration corresponds to a value (ie, a value) of the parameter determined/used; the CSI-
  • the number of bits occupied by the RS configuration information is not less than ⁇ , which is the sum of the number of CSI-RS configurations defined in the LTE system protocol and the number of newly added CSI-RS configurations, where each bit corresponds to one CSI-RS configuration. For example, if a certain bit is 0, it means that the CSI-RS configuration corresponding to the bit is not used. If it is 1, it indicates that the CSI-RS configuration corresponding to the bit is adopted; the terminal determines the k according to the CSI-RS configuration information. The value of ', 1 '), and then the value of the M-location determines the RE used by the network side to send the CSI-RS to the terminal on the corresponding port and the CSI-RS sent on each RE;
  • the CSI-RS subframe configuration information is used to determine a subframe used by the network side to send the CSI-RS;
  • the CSI-RS subframe configuration information may include a CSI-RS transmission period and a subframe offset, and the CSI-RS transmission period is assumed.
  • the subframe offset is 2
  • the terminal may determine that the second subframe in each CSI-RS transmission period T is a subframe in which the network side transmits the CSI-RS;
  • the zero-power CSI-RS configuration information is used to determine the number of the CSI-RS configuration in which the network side does not send the CSI-RS; the number of bits occupied by the zero-power CSI-RS configuration information is not less than M, and M is defined in the LTE system protocol.
  • M is defined in the LTE system protocol.
  • the corresponding CSI-RS is configured as a non-zero-power CSI-RS configuration. If 1, the CSI-RS configuration corresponding to the bit is configured to be a zero-power CSI-RS configuration; the terminal determines that the adopted CSI-RS configuration is zero. When the power CSI-RS is configured, the CSI-RS is not received;
  • the zero-power CSI-RS subframe configuration information is used to determine the number of the subframe in which the network side does not transmit the CSI-RS.
  • the terminal does not receive the CSI-RS on the zero-power CSI-RS subframe.
  • the terminal may further receive at least one of the following six configuration information that is sent by the network side in advance through high layer signaling:
  • the number of CSI-RS ports is used to determine the number of ports used by the network side to send CSI-RSs; the terminal determines the ports used by the network side to send CSI-RSs according to the number of CSI-RS ports;
  • the CSI-RS configuration information is used to determine the number of the CSI-RS configuration used by the network side, and each CSI-RS configuration corresponds to a value of the parameter used for determining and I (ie, ( k ', l ').
  • the value of the CSI-RS configuration information is not less than P, and P is the number of newly added CSI-RS configurations; each bit corresponds to a CSI-RS configuration, for example, if a certain bit is 0, it means that the CSI-RS configuration corresponding to the bit is not used.
  • the terminal determines the value of O according to the CSI-RS configuration information, and further determines according to the The value determines the RE used by the network side to send the CSI-RS to the terminal on the corresponding port, and the CSI-RS sent on each RE;
  • the CSI-RS subframe configuration information is used to determine a subframe used by the network side to send the CSI-RS;
  • the CSI-RS subframe configuration information may include a CSI-RS transmission period and a subframe offset, and the CSI-RS transmission period is assumed.
  • the subframe offset is 2
  • the terminal may determine that the second subframe in each CSI-RS transmission period T is a subframe in which the network side transmits the CSI-RS;
  • the zero-power CSI-RS configuration information is used to determine the number of the CSI-RS configuration in which the network side does not send the CSI-RS; the number of bits occupied by the zero-power CSI-RS configuration information is not less than K, and the new zero power is added.
  • the zero-power CSI-RS subframe configuration information is used to determine the number of the subframe in which the network side does not transmit the CSI-RS.
  • the terminal does not receive the CSI-RS on the zero-power CSI-RS subframe.
  • an embodiment of the present invention further provides a base station, where the base station includes:
  • the determining unit 70 is configured to determine configuration information used by the CSI-RS to transmit, where the configuration information indicates that the network side transmits the CSI-RS by using a compressed CSI-RS structure; and all CSI-RSs in the compressed CSI-RS structure are in the downlink subframe. Or transmitting in a resource unit RE in the first X orthogonal frequency division multiplexing OFDM symbols in the downlink time slot, where X is a positive integer not greater than 3;
  • the sending unit 71 is configured to send, according to the determined configuration information, a corresponding CSI-RS to the terminal.
  • the CSI-RS resource corresponding to each CSI-RS port is composed of Y time-domain neighboring or frequency-domain adjacent REs, where Y Is a positive integer greater than 1;
  • the CSI-RS resource For the CSI-RS resource corresponding to each CSI-RS port, the CSI-RS resource is multiplexed by the CSI-RS of the Y CSI-RS ports at most.
  • the CSI-RS configuration information and the zero-power CSI-RS configuration information included in the configuration information determined by the determining unit 70 both include the parameters /' and mod(, 2);
  • the value of /' and mod( , 2) is 0 , where is the number of the slot in which the CSI-RS resource is located, and /' is the number of the first OFDM symbol occupied by the CSI-RS resource in the slot.
  • the number of types corresponding to the CSI-RS configuration included in the configuration information determined by the determining unit 70 is not less than P, P is the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure;
  • the zero-power CSI-RS configuration information included in the configuration information determined by the determining unit 70 occupies no less than K, and K is the number of types of zero-power CSI-RS configurations corresponding to the compressed CSI-RS structure.
  • the number of types corresponding to the CSI-RS configuration included in the configuration information determined by the determining unit 70 is not less than M, where M is the number of types of CSI-RS configurations defined in the LTE-A system protocol and the CSI corresponding to the compressed CSI-RS structure. - the sum of the number of types of RS configurations;
  • the number of bits occupied by the zero-power CSI-RS configuration information included in the configuration information determined by the determining unit 70 is not less than N, where N is the number of types of zero-power CSI-RS configurations defined in the LTE-A system protocol and the corresponding compressed CSI-RS. The sum of the number of types of zero-power CSI-RS configurations of the structure.
  • Another embodiment of the present invention provides another base station, where the base station includes a processor and a radio frequency unit.
  • the processor is configured to determine configuration information used by the CSI-RS to transmit; the configuration information indicates that the network side transmits the CSI-RS by using a compressed CSI-RS structure; and all CSI-RSs in the compressed CSI-RS structure are in the downlink subframe Or transmitting in a resource unit in the first X OFDM symbols in the downlink slot, where X is a positive integer not greater than 3;
  • the radio unit is configured to transmit a corresponding CSI-RS to the terminal according to the determined configuration information.
  • the base station provided by the embodiment of the present invention sends a CSI-RS in the REs in the first X OFDM symbols in the downlink subframe or the downlink time slot, where X is a positive integer of not more than 3, and it can be seen that the base station provided by the embodiment of the present invention
  • a scheme of transmitting CSI-RSs in the first X OFDM symbols in a downlink subframe or a downlink slot is implemented.
  • This scheme implements an enhancement of the CSI reference signal and can solve the problem of limited configuration of the CSI reference signal.
  • the scheme is applied to the time division duplex TDD protection band and the new type of NCT carrier, the first X OFDM symbols of the subframe can be fully utilized, thereby reducing the waste of time-frequency resources.
  • the technical solution provided by the embodiments of the present invention is applicable not only to the TDD system but also to the FDD system.
  • an embodiment of the present invention further provides a terminal, where the terminal includes:
  • the determining unit 80 is configured to determine configuration information used by the network side to send the CSI-RS, where the configuration information indicates that the network side uses the compressed CSI-RS structure to transmit the CSI-RS; and all the CSI-RSs in the compressed CSI-RS structure are in the downlink. Transmitted in a resource unit RE within the first X orthogonal frequency division multiplexing OFDM symbols in a subframe or a downlink slot, where X is a positive integer not greater than 3;
  • the receiving unit 81 is configured to receive, according to the determined configuration information, a CSI-RS sent by the network side.
  • the CSI-RS resource corresponding to each CSI-RS port is composed of Y time-domain neighboring or frequency-domain neighboring REs, where Y Is a positive integer greater than 1;
  • the CSI-RS resource For the CSI-RS resource corresponding to each CSI-RS port, the CSI-RS resource is multiplexed by the CSI-RS of the Y CSI-RS ports at most.
  • the configuration information determined by the determining unit 80 includes CSI-RS configuration information and zero-power CSI-RS matching.
  • the set information contains the parameters /' and mod(, 2);
  • the value of / ' and mod( , 2) is 0, where is the number of the slot in which the CSI-RS resource is located, and /' is the number of the first OFDM symbol occupied by the CSI-RS resource in the slot.
  • the number of types corresponding to the CSI-RS configuration included in the configuration information determined by the determining unit 80 is not less than P, where P is the number of types of CSI-RS configurations corresponding to the compressed CSI-RS structure;
  • the zero-power CSI-RS configuration information included in the configuration information determined by the determining unit 80 occupies no less than K, and K is the number of types of zero-power CSI-RS configurations corresponding to the compressed CSI-RS structure.
  • the number of types corresponding to the CSI-RS configuration included in the configuration information determined by the determining unit 80 is not less than M, and M is the number of types of CSI-RS configurations defined in the LTE-A system protocol and the CSI corresponding to the compressed CSI-RS structure. - the sum of the number of types of RS configurations;
  • the number of bits occupied by the zero-power CSI-RS configuration information included in the configuration information determined by the determining unit 80 is not less than N, where N is the number of types of zero-power CSI-RS configurations defined in the LTE-A system protocol and the corresponding compressed CSI-RS. The sum of the number of types of zero-power CSI-RS configurations of the structure.
  • Another embodiment of the present invention further provides a terminal, where the terminal includes a processor and a radio frequency unit.
  • the processor is configured to determine configuration information used by the network side to send the CSI-RS; the configuration information indicates that the network side transmits the CSI-RS by using a compressed CSI-RS structure; and all CSI-RSs in the compressed CSI-RS structure are in the downlink
  • the resource elements in the first X OFDM symbols in the subframe or downlink time slot are transmitted, where X is a positive integer not greater than 3; the radio frequency unit is configured to receive the CSI-RS transmitted by the network side according to the determined configuration information.
  • the terminal provided by the embodiment of the present invention receives the CSI-RS on the REs in the first X OFDM symbols in the downlink subframe or the downlink time slot, where X is a positive integer of not more than 3, and the terminal provided by the embodiment of the present invention is visible.
  • a scheme of transmitting CSI-RSs in the first X OFDM symbols in a downlink subframe or a downlink slot is implemented. This scheme implements an enhancement of the CSI reference signal and can solve the problem of limited configuration of the CSI reference signal.
  • the scheme is applied to the time division duplex TDD protection band and the new type of NCT carrier, the first X OFDM symbols of the subframe can be fully utilized, thereby reducing the waste of time-frequency resources.
  • the technical solution provided by the embodiments of the present invention is applicable not only to the TDD system but also to the FDD system.
  • the beneficial effects of the present invention include:
  • the network side sends the CSI-RS in the first two OFDM symbols of the subframe, and the terminal receives the CSI-RS on the first two OFDM symbols of the subframe, and the method is implemented.
  • the first two OFDM symbols of the frame transmit the CSI-RS scheme.
  • This scheme implements an enhancement of the CSI reference signal and can solve the problem of limited configuration of the CSI reference signal.
  • the scheme is applied to the TDD guard band and the NCT carrier, the first two OFDM symbols of the subframe are fully utilized, thereby reducing the waste of time-frequency resources. It should be noted that the technical solution provided by the embodiment of the present invention is applicable not only to the TDD system but also to the FDD system.
  • the present invention is directed to a flowchart of a method, apparatus (system), and computer program product according to an embodiment of the present invention. And / or block diagram to describe. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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

Abstract

L'invention concerne un procédé et un dispositif de transmission de signaux de référence (CSI-RS) d'informations d'état de canal, relatifs au domaine des communications sans fil et utilisés pour réduire le gaspillage des ressources de temps-fréquence. Dans la présente invention, le procédé comprend : l'envoi, par un côté réseau, des CSI-RS dans des éléments (RE) de ressources dans les X symboles de multiplexage par répartition de fréquence (OFDM) orthogonaux précédents dans une sous-trame en liaison descendante ou un intervalle en liaison descendante, X étant un entier positif inférieur ou égal à 3 ; et la réception, par un terminal, des CSI-RS sur les RE dans les X symboles OFDM précédents dans la sous-trame en liaison descendante ou l'intervalle en liaison descendante. Il est possible de constater que le procédé de l'invention offre la solution de transmission des CSI-RS dans les X symboles OFDM précédents dans la sous-trame en liaison descendante ou l'intervalle en liaison descendante. Lorsque la solution est appliquée à une bande de garde de duplexage en répartition dans le temps (TDD) et une porteuse d'un nouveau type de porteuse (NCT), les X symboles OFDM précédents dans la sous-trame sont pleinement utilisés et ainsi, le gaspillage des ressources temps-fréquence est réduit.
PCT/CN2013/088752 2012-12-06 2013-12-06 Procédé et dispositif de transmission de signaux de référence d'informations d'état de canal WO2014086313A1 (fr)

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CN106534001B (zh) * 2015-09-10 2019-07-05 上海朗帛通信技术有限公司 一种低延迟的无线通信方法和装置
WO2017075836A1 (fr) * 2015-11-06 2017-05-11 华为技术有限公司 Procédé de configuration de csi-rs et appareil associé
CN108631994B (zh) 2017-03-24 2022-10-28 中兴通讯股份有限公司 信道状态信息导频的传输方法和装置
CN108811088B (zh) 2017-04-28 2024-05-14 华为技术有限公司 一种消息传输方法、装置、终端及基站
CN108809556B (zh) 2017-04-28 2023-11-17 华为技术有限公司 发送和接收参考信号的方法、网络设备和终端设备
CN110391887B (zh) * 2018-04-20 2021-11-09 华为技术有限公司 信号处理方法及装置
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