WO2015100960A1 - Procédé et dispositif de transmission/réception de signalisation auxiliaire de réseau - Google Patents

Procédé et dispositif de transmission/réception de signalisation auxiliaire de réseau Download PDF

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Publication number
WO2015100960A1
WO2015100960A1 PCT/CN2014/080195 CN2014080195W WO2015100960A1 WO 2015100960 A1 WO2015100960 A1 WO 2015100960A1 CN 2014080195 W CN2014080195 W CN 2014080195W WO 2015100960 A1 WO2015100960 A1 WO 2015100960A1
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Prior art keywords
information
base station
network
indicating
information indicating
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PCT/CN2014/080195
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English (en)
Chinese (zh)
Inventor
王瑜新
孙云锋
弓宇宏
李儒岳
鲁照华
邬华明
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中兴通讯股份有限公司
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Publication of WO2015100960A1 publication Critical patent/WO2015100960A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • 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
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • 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
    • H04L5/0028—Variable division
    • 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—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided

Definitions

  • the present invention relates to mobile communication technologies, and more particularly to a method and apparatus for transmitting and receiving network assisted signaling. Background technique
  • Inter-cell interference is an inherent problem in cellular mobile communication systems.
  • the traditional solution is to use frequency reuse to avoid interference between adjacent cells by letting neighboring cells use different carrier frequencies.
  • the frequency reuse coefficient is 1, that is, the neighboring cells use the same carrier frequency, and the inter-cell interference problem is also more than the traditional frequency reuse.
  • the system is complicated.
  • Long Term Evolution (LTE) is a system based on OFDM technology. It mainly uses inter-cell interference randomization, interference avoidance and coordination techniques to solve the interference problem. It is transmitted on the transmitting side through network-side precoding and cooperative scheduling. Avoid interference avoidance.
  • the interference coordination based on the sender largely depends on the accuracy of the channel state information (CSI) of the feedback. Due to the limitation of feedback signaling overhead and the delay of feedback processing, the delay of the backhaul link also greatly affects the effect of inter-cell cooperation.
  • the LTE system based on the method of interference coordination at the transmitting end cannot completely solve the interference problem. How to effectively eliminate and suppress interference between cells and between users is an important direction for further effective improvement of spectrum efficiency.
  • the common reference signal (CRS, Common Reference Signal) is used for pilot measurement and data demodulation, that is, all users use CRS for channel estimation.
  • CRS Common Reference Signal
  • the transmitting end needs to additionally notify the receiving end of the specific precoding matrix (also referred to as precoding weight) information used for data transmission, and the overhead of the pilot is large.
  • precoding matrix also referred to as precoding weight
  • MU-MIMO multi-user multi-input multi-output
  • LTE-A Enhanced Long Term Evolution
  • DMRS Demodulation Reference Signal
  • CSI-RS Channel State Information Referenced Signal
  • MCS modulation coding mode
  • the pre-coding information is not carried in the transmission of the CSI-RS; and the DMRS is mainly used for the Physical Downlink Shared Channel (PDSCH) and the Enhanced Physical Downlink Control Channel (ePDCCH).
  • PDSCH Physical Downlink Shared Channel
  • ePDCCH Enhanced Physical Downlink Control Channel
  • the transmission of the DMRS carries precoding information of the corresponding PDSCH/ePDCCH.
  • LTE and LTE-A systems can be classified into Frequency Division Duplex (FDD) and Time Division Duplex (TDD) systems according to the uplink and downlink duplex modes.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • CSI-RS and FDD and TDD systems are used.
  • the pattern of the DMRS will vary.
  • MMSE-IRC Minimum Mean Square Error-Interference Rejection Combining
  • IC Interference Cancellation
  • ML Maximum Likelihood
  • the network side needs to provide the target UE with the demodulation reference signal (DMRS, Demodulation Reference Signal) port information used by the UE, and the initialization parameters of the DMRS (including the scrambling code ID, the virtual cell ID, and the physical Cell ID, etc.)
  • DMRS demodulation reference signal
  • the initialization parameters of the DMRS including the scrambling code ID, the virtual cell ID, and the physical Cell ID, etc.
  • the network side needs to provide the above-mentioned information required by the MMSE-IRC, and also needs to provide the modulation mode or MCS information of the interference source.
  • the method for transmitting the information of the interference source to the UE in the existing network is: the base station of the interfering cell sends the control signaling to the base station of the cell where the UE is located through the X2 interface, and the base station of the cell where the UE is located forwards the control signaling to the UE through the air interface. .
  • This method consumes a large amount of X2 interface signaling overhead and air interface signaling overhead, and causes a large delay, which eventually makes advanced receiver technology difficult to apply to the actual system.
  • the transmission delay between nodes is relatively large, and dynamic parameters like DMRS port information, modulation mode or MCS are not suitable for non-ideal.
  • the backhaul case is transmitted in the X2 interface. Summary of the invention
  • the technical problem to be solved by the embodiments of the present invention is to provide a method and a device for transmitting and receiving network auxiliary signaling, which can reduce the signaling overhead of the X2 interface.
  • a method for transmitting network assisted signaling comprising:
  • the first base station sends the downlink control signaling by using the physical downlink control channel or the enhanced physical downlink control channel.
  • the information carried by the downlink control signaling includes: information indicating whether there is a scheduled user, and/or indicating a downlink transmission parameter of the scheduling user. Information.
  • the method before the step of the first base station transmitting the downlink control signaling by using the physical downlink control channel or the enhanced physical downlink control channel, the method further includes:
  • the first base station scrambles the cyclic redundancy check CRC of the downlink control signaling by using a public radio network temporary identifier RNTI.
  • the information indicating whether there is a scheduled user is: indicating that the first base station is located
  • the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information:
  • a downlink transmission mode indicating a downlink transmission mode, a modulation mode, a modulation and coding mode MCS, a precoding information, a joint indication antenna port, a scrambling code ID, and a layer number information corresponding to each subband or physical resource block in a cell system bandwidth of the first base station, Carrier indication information.
  • the information indicating the downlink transmission parameter of the scheduling user includes a downlink transmission mode corresponding to each sub-band or physical resource block in the bandwidth of the cell system where the first base station is located;
  • the downlink transmission mode is a transmission mode based on a common reference signal CRS or a transmission mode based on a demodulation reference signal DMRS.
  • the information indicating the downlink transmission parameter of the scheduling user includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located;
  • the precoding information includes one or more of the following information:
  • the information indicating the number of layers used by the scheduling user, the information of the precoding matrix index, the number of layers used by the scheduling user, and the precoding matrix index which are used to indicate the information of the precoding matrix index used by the scheduling user.
  • the format of the downlink control signaling is downlink control information DCI format format IX or format 2X or format Y or format 3Z, where X represents E or F or G or H, and Y represents 5 or 6 or 7 or 8 , Z means B or C or 0 or £.
  • the method before the step of the first base station transmitting the downlink control signaling by using the physical downlink control channel or the enhanced physical downlink control channel, the method further includes:
  • the first base station receives the request information sent by the second base station from the requesting network for performing interference cancellation or suppression through the inter-base station or the inter-node interface, or the user terminal of the cell where the second base station is located, through the inter-base station or the inter-node interface, and then passes the base station. Inter- or inter-node interface feeding back network assistance information to the second base station;
  • the inter-base station or inter-node interface includes: an X2 interface or a fiber interface.
  • the request information includes:
  • the network assistance information includes one or more of the following information:
  • the range information of the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, and the configuration set 1 or the configuration set 2 of the enhanced physical downlink control channel ePDCCH indicating the cell where the first base station is located The information of the domain resource and/or the frequency domain resource, the public RNTL indicates the information of the subframe requiring network-assisted interference cancellation or suppression, the information indicating the range of the precoding matrix index, and the information indicating the range of the DMR S antenna port.
  • the range information indicating that the C-RNTI of the user scheduled by the first base station is located is two different values of the C-RNTI or the absolute value and the relative value of the C-RNTI.
  • the method further includes:
  • the first base station or the second base station configures, by the high layer radio resource control RRC signaling, that the user terminal or the scheduling user is in a transmission mode M, M is any one of integers 11-15.
  • the second base station sends subframe configuration information that needs to be interference-cancelled or suppressed to the scheduling user by using high-layer RRC signaling.
  • a method for receiving network assisted signaling comprising:
  • the user terminal receives the downlink control signaling from the first base station through the physical downlink control channel or the enhanced physical downlink control channel; the information carried in the downlink control signaling includes: information indicating whether there is a scheduled user, and/or indicating the scheduling user Information about the downstream transmission parameters.
  • the information indicating whether the scheduling user exists is: indicating that the first base station is located.
  • the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information:
  • a downlink transmission mode indicating a downlink transmission mode, a modulation mode, a modulation and coding mode MCS, a precoding information, a joint indication antenna port, a scrambling code ID, and a layer number information corresponding to each subband or physical resource block in a cell system bandwidth of the first base station, Carrier indication information.
  • the information indicating the downlink transmission parameter of the scheduling user includes a downlink transmission mode corresponding to each sub-band or physical resource block in the bandwidth of the cell system where the first base station is located;
  • the downlink transmission mode is a transmission mode based on a common reference signal CRS or a transmission mode based on a demodulation reference signal DMRS.
  • the information indicating the downlink transmission parameter of the scheduling user includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located;
  • the precoding information includes one or more of the following information:
  • Information indicating a precoding matrix index used by the scheduling user jointly indicating the scheduling
  • the number of layers used by the user, the information of the precoding matrix index, the information indicating the number of layers used by the scheduling user, the precoding matrix index, and the number of CRS ports jointly indicating the number of layers used by the scheduling user,
  • the information of the coding matrix index range and the number of CRS ports indicates that the scheduling user transmits information based on single antenna transmission of one CRS port or based on diversity of two/four CRS ports.
  • the method before the step of the user terminal receiving the downlink control signaling sent by the first base station by using the physical downlink control channel or the enhanced physical downlink control channel, the method further includes:
  • the second base station requesting network assistance for interference cancellation or suppression sends request information to the first base station through an inter-base station or inter-node interface;
  • the inter-base station or inter-node interface includes: an X2 interface or a fiber interface.
  • the request information includes:
  • the network assistance information includes one or more of the following information:
  • the range information of the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, and the configuration set 1 or the configuration set 2 of the enhanced physical downlink control channel ePDCCH indicating the cell where the first base station is located The information of the domain resource and/or the frequency domain resource, the public RNTL indicates the information of the subframe requiring network-assisted interference cancellation or suppression, the information indicating the range of the precoding matrix index, and the information indicating the range of the DMR S antenna port.
  • the range information indicating that the C-RNTI of the user scheduled by the first base station is located is two different values of the C-RNTI or the absolute value and the relative value of the C-RNTI.
  • the method further includes:
  • the information is blindly detected by the downlink control signaling sent by the first base station.
  • An apparatus for transmitting network assisted signaling including a sending module,
  • the sending module is configured to send downlink control signaling by using a physical downlink control channel or an enhanced physical downlink control channel; the information carried by the downlink control signaling includes: information indicating whether there is a scheduled user, and/or indicating scheduling Information about the downlink transmission parameters of the user.
  • the device for sending network auxiliary signaling further includes a scrambling module
  • the scrambling module is configured to scramble the cyclic redundancy check CRC of the downlink control signaling by using a public radio network temporary identifier RNTI;
  • the sending module is specifically configured to send the scrambled downlink control signaling by using a physical downlink control channel or an enhanced physical downlink control channel.
  • the information indicating whether the scheduling user exists is: indicating that the first base station is located.
  • the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information:
  • a downlink transmission mode indicating a downlink transmission mode, a modulation mode, a modulation and coding mode MCS, a precoding information, a joint indication antenna port, a scrambling code ID, and a layer number information corresponding to each subband or physical resource block in a cell system bandwidth of the first base station, Carrier indication information.
  • the information indicating the downlink transmission parameter of the scheduling user includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located;
  • the precoding information includes one or more of the following information:
  • the information indicating the number of layers used by the scheduling user, the information of the precoding matrix index, the number of layers used by the scheduling user, and the precoding matrix index which are used to indicate the information of the precoding matrix index used by the scheduling user.
  • the apparatus for sending network auxiliary signaling further includes a receiving module,
  • the receiving module is configured to receive, by using an inter-base station or an inter-node interface, request information sent by a second base station from the requesting network for performing interference cancellation or suppression, by using an inter-base station or inter-node interface, or a user terminal of a cell where the second base station is located;
  • the transmitting module is further configured to feed back network assistance information to the second base station through an inter-base station or inter-node interface.
  • the request information includes:
  • the network assistance information includes one or more of the following information:
  • the range information of the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, and the configuration set 1 or the configuration set 2 of the enhanced physical downlink control channel ePDCCH indicating the cell where the first base station is located The information of the domain resource and/or the frequency domain resource, the public RNTL indicates the information of the subframe requiring network-assisted interference cancellation or suppression, the information indicating the range of the precoding matrix index, and the information indicating the range of the DMR S antenna port.
  • the device for sending network auxiliary signaling further includes a configuration module, where
  • the configuration module is configured to configure, by the high layer radio resource control RRC signaling, that the user terminal or the scheduling user is in a transmission mode M, where M is an integer of 11 to 15.
  • An apparatus for receiving network auxiliary signaling comprising a receiving module,
  • the receiving module is configured to receive, by the first base station, the downlink control signaling by using the physical downlink control channel or the enhanced physical downlink control channel; the information carried by the downlink control signaling includes: information indicating whether there is a scheduled user, And/or information indicating a downlink transmission parameter of the scheduling user.
  • the information indicating whether the scheduling user exists is: indicating that the first base station is located optionally, the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information: And indicating a downlink transmission mode, a modulation mode, a modulation and coding mode MCS, a precoding information, a joint indication antenna port, a scrambling code ID, and a layer number information corresponding to each subband or physical resource block in a cell system bandwidth of the first base station, Carrier indication information.
  • the information indicating the downlink transmission parameter of the scheduling user includes a downlink transmission mode corresponding to each sub-band or physical resource block in the bandwidth of the cell system where the first base station is located;
  • the downlink transmission mode is a transmission mode based on a common reference signal CRS or a transmission mode based on a demodulation reference signal DMRS.
  • the information indicating the downlink transmission parameter of the scheduling user includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located;
  • the precoding information includes one or more of the following information:
  • the information indicating the number of layers used by the scheduling user, the information of the precoding matrix index, the number of layers used by the scheduling user, and the precoding matrix index which are used to indicate the information of the precoding matrix index used by the scheduling user.
  • the apparatus for receiving network auxiliary signaling further includes: a sending module, where the sending module is configured to send request information to the first base station by using an inter-base station or an inter-node interface;
  • the receiving module is further configured to receive network auxiliary information from the first base station through inter-base station or inter-node interface feedback through an inter-base station or an inter-node interface;
  • the inter-base station or inter-node interface includes: an X2 interface or a fiber interface.
  • the request information includes:
  • the network assistance information includes one or more of the following information: And indicating the range information of the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, and the configuration set 1 or the configuration set 2 of the enhanced physical downlink control channel ePDCCH indicating the cell where the first base station is located
  • the information of the domain resource and/or the frequency domain resource, the public RNTL indicates the information of the subframe requiring network-assisted interference cancellation or suppression, the information indicating the range of the precoding matrix index, and the information indicating the range of the DMRS antenna port.
  • the apparatus for receiving network auxiliary signaling further includes a descrambling module, where the descrambling module is configured to perform blind detection on downlink control signaling sent by the first base station according to the received network auxiliary information.
  • the embodiment of the present invention includes: the first base station sends the downlink control signaling by using the physical downlink control channel or the enhanced physical downlink control channel; the information carried by the downlink control signaling includes at least: indicating whether there is a scheduled user Information, and/or information indicating the downlink transmission parameters of the scheduling user.
  • the first base station directly sends the downlink control signaling to the user terminal, and does not need to be sent by the base station of the cell where the user terminal is located, thereby reducing the signaling overhead of the X2 interface.
  • FIG. 1 is a flowchart of a method for transmitting network assisted signaling according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for receiving network assisted signaling according to an embodiment of the present invention
  • FIG. 3 is a structural diagram of an apparatus for transmitting network auxiliary signaling according to an embodiment of the present invention
  • FIG. 4 is a structural composition diagram of an apparatus for receiving network auxiliary signaling according to an embodiment of the present invention. detailed description
  • an embodiment of the present invention provides a method for transmitting network assisted signaling, including: Step 100: The first base station sends downlink control signaling by using a physical downlink control channel or an enhanced physical downlink control channel.
  • the information carried by the downlink control signaling includes: at least: indicating whether there is information about scheduling users, and/or indicating downlink of the scheduling user. Information about the transmission parameters.
  • the format of the downlink control signaling is the downlink control information (DCI, Downlink Control Information) format format IX or DCI format 2X or DCI format Y or DCI format 3Z, where X represents E or F or G or H, and Y represents 5 or 6 or 7 or 8, Z represents B or C or in this step, the information indicating whether there is a scheduled user is: indicating the cell system in which the first base station is located
  • the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information:
  • a downlink transmission mode Indicates a downlink transmission mode, a modulation mode, a modulation and coding mode MCS, a precoding information, a joint indication antenna port, a scrambling code ID, a layer number information, and a carrier indication corresponding to each subband or physical resource block in a cell system bandwidth of the first base station. information.
  • the information indicating the downlink transmission parameter of the scheduling user includes a downlink transmission mode corresponding to each sub-band or physical resource block in the bandwidth of the cell system where the first base station is located; the downlink transmission mode is a CRS-based transmission mode or a DMRS-based transmission mode. mode.
  • the modulation mode may be Quadrature Phase Shift Keying (QPSK) modulation, or Quadrature Amplitude Modulation (QAM) modulation, or 64QAM modulation, or 256QAM modulation.
  • QPSK Quadrature Phase Shift Keying
  • QAM Quadrature Amplitude Modulation
  • the information indicating the downlink transmission parameter of the scheduling user includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located; the precoding information includes one or more of the following information:
  • the information indicating the precoding matrix index used by the scheduling user the information indicating the number of layers used by the scheduling user, the information of the precoding matrix index, the information indicating the number of layers used by the scheduling user, the precoding matrix index, and the number of CRS ports. And jointly indicating information about the number of layers used by the scheduling user, the precoding matrix index range, and the number of CRS ports, indicating that the scheduling user transmits information based on single antenna transmission of one CRS port or based on diversity of two/four CRS ports.
  • the information indicating the joint indication antenna port, the scrambling code ID, and the number of layers may be represented by 3 bits or 4 bits, such as Table 1 or Table 2 or Table 3.
  • 4 bits can be used to indicate the single-antenna transmission of the scheduling user based on one CRS port or the diversity transmission based on two/four CRS ports, the number of layers used by the scheduling user, and the CRS port.
  • the number and precoding matrix index range as shown in Table 4 or Table 5.
  • 4 bits can be used to indicate the diversity transmission range of the single antenna of the scheduling user based on one CRS port to the two/four CRS ports, as shown in Table 6.
  • 4 bits can be used to represent the precoding matrix index range, as shown in Table 7.
  • 3 bits can be used to represent the precoding matrix index range, as shown in Table 8.
  • 4 bits can be used to indicate the number of layers used by the scheduling user, the antenna port, the scrambling code ID, the number of layers used by the scheduling user, and the precoding matrix index range, as shown in Table 9 or Table 10. 1010 PMI 6 ⁇ PMI 7
  • the method further includes: Step 101: The first base station uses a public wireless network temporary identifier to perform scrambling on a cyclic redundancy check CRC of the downlink control signaling.
  • the method further includes: Step 102: The first base station receives, by the inter-base station or the inter-node interface, the second base station that assists the network to assist in performing interference cancellation or suppression, or After the inter-node interface, or the request information sent by the user terminal of the cell where the second base station is located, the network auxiliary information is fed back to the second base station through the inter-base station or the inter-node interface.
  • the inter-base station or inter-node interface includes: an X2 interface or a fiber interface.
  • the request information includes:
  • the network auxiliary information includes one or more of the following information:
  • the range information of the C-RNTI of the user scheduled by the first base station the configuration set 1 of the ePDCCH indicating the cell where the first base station is located, or the time domain resource and/or the frequency domain resource of the configuration set 2, the public RNTI, Information indicating a subframe in which network-assisted interference cancellation or suppression is required, information indicating a precoding matrix index range, and information indicating a DMRS antenna port range.
  • the range information indicating the C-RNTI of the user scheduled by the first base station is two different values of the C-RNTI or the absolute value and the relative value of the C-RNTI.
  • the method further includes:
  • Step 103 The first base station or the second base station configures, by using high layer radio resource control (RRC) signaling, that the user terminal is in the transmission mode M, and M is any one of 11 to 15 integers (including 11 and 15).
  • RRC radio resource control
  • the downlink control signaling may be sent to the user terminal by using the newly defined DCI formatlX or DCI format 2X or DCI format Y or DCI format 3Z format.
  • the method further includes: The second base station sends subframe configuration information that needs interference cancellation or suppression to the scheduling user by using the high layer RRC signaling.
  • an embodiment of the present invention further provides a method for receiving network auxiliary signaling, including: Step 200: A user terminal receives a downlink control signaling from a first base station by using a physical downlink control channel or an enhanced physical downlink control channel.
  • the information carried by the downlink control signaling includes at least: information indicating whether there is a scheduling user, and/or information indicating a downlink transmission parameter of the scheduling user.
  • the information indicating whether there is a scheduled user is: indicating the cell system in which the first base station is located
  • the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information:
  • a downlink transmission mode Indicates a downlink transmission mode, a modulation mode, a modulation and coding mode MCS, a precoding information, a joint indication antenna port, a scrambling code ID, a layer number information, and a carrier indication corresponding to each subband or physical resource block in a cell system bandwidth of the first base station. information.
  • the information indicating the downlink transmission parameter of the scheduling user includes a downlink transmission mode corresponding to each sub-band or physical resource block in the bandwidth of the cell system in which the first base station is located;
  • the downlink transmission mode is a transmission mode based on a common reference signal CRS or a transmission mode based on a demodulation reference signal DMRS.
  • the information indicating the downlink transmission parameter of the scheduling user includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located;
  • the precoding information includes one or more of the following information:
  • the information indicating the precoding matrix index used by the scheduling user the information indicating the number of layers used by the scheduling user, the information of the precoding matrix index, the information indicating the number of layers used by the scheduling user, the precoding matrix index, and the number of CRS ports. And jointly indicating information about the number of layers used by the scheduling user, the precoding matrix index range, and the number of CRS ports, indicating that the scheduling user transmits information based on single antenna transmission of one CRS port or based on diversity of two/four CRS ports.
  • the method further includes: Step 201: The second base station requesting the network to assist the interference cancellation or suppression sends the request information to the first base station by using an inter-base station or an inter-node interface.
  • the inter-base station or inter-node interface includes: an X2 interface or a fiber interface.
  • the request information includes:
  • Step 202 Receive network auxiliary information fed back from the first base station through an inter-base station or an inter-node interface by using an inter-base station or an inter-node interface.
  • the inter-base station or inter-node interface includes: an X2 interface or a fiber interface.
  • network auxiliary signaling may be sent through high layer RRC signaling.
  • the network auxiliary information includes one or more of the following information:
  • the range information of the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, and the configuration set 1 or the configuration set 2 of the enhanced physical downlink control channel ePDCCH indicating the cell where the first base station is located The information of the domain resource and/or the frequency domain resource, the public RNTL indicates the information of the subframe requiring network-assisted interference cancellation or suppression, the information indicating the range of the precoding matrix index, and the information indicating the range of the DMRS antenna port.
  • the range information indicating the C-RNTI of the user scheduled by the first base station is two different values of the C-RNTI or the absolute value and the relative value of the C-RNTI.
  • the method further includes: Step 203: The second base station passes the physical control channel or the enhanced physical control channel or the upper layer
  • the RRC signaling sends the network auxiliary information to the user terminal, and the user terminal performs blind detection on the downlink control signaling sent by the first base station according to the received network auxiliary information.
  • an embodiment of the present invention further provides an apparatus for sending network auxiliary signaling, which at least includes:
  • a sending module configured to send downlink control signaling by using a physical downlink control channel or an enhanced physical downlink control channel; the information carried by the downlink control signaling includes at least: information indicating whether there is a scheduled user, and/or indicating a scheduling user Information about the downstream transmission parameters.
  • the device for sending network auxiliary signaling in the embodiment of the present invention further includes:
  • a scrambling module configured to scramble the cyclic redundancy check CRC of the downlink control signaling using a public wireless network temporary identifier RNTI;
  • a sending module configured to: send the scrambled downlink control signaling by using a physical downlink control channel or an enhanced physical downlink control channel.
  • the device for transmitting the network auxiliary signaling in the embodiment of the present invention indicates whether the information of the scheduling user is: indicating whether there is information about the scheduling user on each sub-band or each physical resource block in the bandwidth of the cell system in which the first base station is located.
  • the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information:
  • the information indicating the downlink transmission parameter of the scheduling user includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located;
  • the precoding information includes one or more of the following information:
  • the information indicating the precoding matrix index used by the scheduling user the information indicating the number of layers used by the scheduling user, the information of the precoding matrix index, the information indicating the number of layers used by the scheduling user, the precoding matrix index, and the number of CRS ports. And jointly indicating information about the number of layers used by the scheduling user, the precoding matrix index range, and the number of CRS ports, indicating that the scheduling user transmits information based on single antenna transmission of one CRS port or based on diversity of two/four CRS ports.
  • a receiving module configured to receive, by the inter-base station or the inter-node interface, request information sent by the second base station from the requesting network for interference cancellation or suppression, or between the inter-base station or inter-node interface, or the user terminal of the cell in which the second base station is located;
  • a sending module which is also configured to:
  • the network auxiliary information is fed back to the second base station through an inter-base station or inter-node interface.
  • the apparatus for transmitting network auxiliary signaling includes: information indicating whether network assisted interference cancellation or suppression is required; indicating whether a cell of the second base station has a user terminal to use an advanced receiver for interference cancellation or suppression Information; information indicating physical resource blocks or subframes that require network-assisted interference cancellation or suppression; and/or information indicating the carrier.
  • the network auxiliary information includes one or more of the following information:
  • the range information of the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station Indicates the range information of the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, the configuration set 1 of the enhanced physical downlink control channel ePDCCH indicating the cell where the first base station is located, or the time domain resource of the configuration set 2 Or information of a frequency domain resource, a public RNTI, information indicating a subframe that needs network-assisted interference cancellation or suppression, information indicating a range of a precoding matrix index, and information indicating a range of a DMRS antenna port.
  • a configuration module configured to configure the user terminal or the scheduled user to be in the transmission mode ⁇ , ⁇ to any one of 11 to 15 integers (including 11 and 15) by the high layer radio resource control RRC signaling.
  • the embodiment of the present invention further provides an apparatus for receiving network auxiliary signaling, which at least includes: a receiving module, configured to receive, by the first base station, downlink control signaling by using a physical downlink control channel or an enhanced physical downlink control channel;
  • the information carried in the downlink control signaling includes at least: information indicating whether there is a scheduling user, and/or information indicating a downlink transmission parameter of the scheduling user.
  • the apparatus for receiving the network auxiliary signaling in the embodiment of the present invention indicates whether the information of the scheduling user is: indicating whether there is information about the scheduling user on each sub-band or each physical resource block in the bandwidth of the cell system in which the first base station is located.
  • the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information:
  • the apparatus for receiving the network auxiliary signaling in the embodiment of the present invention includes a downlink transmission mode corresponding to each sub-band or physical resource block in the bandwidth of the cell system in which the first base station is located;
  • the downlink transmission mode is a transmission mode based on a common reference signal CRS or a transmission mode based on a demodulation reference signal DMRS.
  • the apparatus for receiving the network auxiliary signaling in the embodiment of the present invention includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located;
  • the precoding information includes one or more of the following information:
  • the information indicating the precoding matrix index used by the scheduling user the information indicating the number of layers used by the scheduling user, the information of the precoding matrix index, the information indicating the number of layers used by the scheduling user, the precoding matrix index, and the number of CRS ports. And jointly indicating the number of layers used by the scheduling user, the precoding matrix index range, and the number of CRS ports, indicating that the scheduling user transmits based on a single antenna of one CRS port or based on diversity of two/four CRS ports. .
  • a sending module configured to send request information to the first base station by using an inter-base station or inter-node interface; the receiving module is further configured to receive, by using an inter-base station or an inter-node interface, network auxiliary information that is fed back from the first base station through the inter-base station or inter-node interface;
  • Inter-base station or inter-node interfaces include: X2 interface or fiber interface.
  • the apparatus for receiving network auxiliary signaling in the embodiment of the present invention includes:
  • the network auxiliary information includes one or more of the following information:
  • a range information indicating a cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, and a configuration set indicating an enhanced physical downlink control channel ePDCCH of the cell where the first base station is located Combining 1 or configuring the information of the time domain resource and/or the frequency domain resource of the set 2, the public RNTI, the information indicating the subframe to be subjected to network-assisted interference cancellation or suppression, the information indicating the range of the precoding matrix index, and the indication DMRS Information on the antenna port range.
  • a descrambling module configured to perform blind detection on the downlink control signaling sent by the first base station according to the received network auxiliary information.
  • the downlink control signaling is directly sent to the user terminal by the first base station, and is not required to be sent by the base station of the cell where the user terminal is located, thereby reducing the signaling overhead of the X2 interface.
  • the embodiment of the present invention includes: the first base station sends the downlink control signaling by using the physical downlink control channel or the enhanced physical downlink control channel; the information carried by the downlink control signaling includes at least: information indicating whether there is a scheduled user, and/or Information indicating the downlink transmission parameters of the scheduling user.
  • the first base station directly sends the downlink control signaling to the user terminal, and does not need to be sent by the base station of the cell where the user terminal is located, thereby reducing the signaling overhead of the X2 interface, so the present invention has a strong Industrial applicability.

Abstract

L'invention concerne un procédé et un dispositif de transmission/réception de signalisation auxiliaire de réseau. Dans le procédé : une première station de base envoie des signaux de commande en liaison descendante via un canal de commande physique en liaison descendante ou un canal de commande physique en liaison descendante amélioré, des informations transportées par les signaux de commande en liaison descendante comprenant au moins : des informations indiquant si un utilisateur programmeur existe et/ou des information indiquant un paramètre de transmission en liaison descendante de l'utilisateur programmeur. Dans les modes de réalisation de la présente invention, des signaux de commande en liaison descendante sont directement envoyés à un terminal d'utilisateur par une première station de base sans être envoyés par une station de base d'une cellule où se trouve le terminal d'utilisateur, ce qui réduit le surdébit de signalisation d'une interface X2.
PCT/CN2014/080195 2013-12-30 2014-06-18 Procédé et dispositif de transmission/réception de signalisation auxiliaire de réseau WO2015100960A1 (fr)

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CN107733563B (zh) 2016-08-12 2019-08-13 中兴通讯股份有限公司 参考信号的发送方法及装置
CN110224727A (zh) * 2016-08-12 2019-09-10 华为技术有限公司 数据发送方法、信令发送方法、装置及系统
CN108023722B (zh) * 2016-11-04 2022-11-11 中兴通讯股份有限公司 一种控制信道的发送方法和装置
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