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WO2017194010A1 - Procédé et dispositif de transmission d'informations pilotes, et procédé et dispositif de réception d'informations pilotes - Google Patents

Procédé et dispositif de transmission d'informations pilotes, et procédé et dispositif de réception d'informations pilotes Download PDF

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Publication number
WO2017194010A1
WO2017194010A1 PCT/CN2017/084214 CN2017084214W WO2017194010A1 WO 2017194010 A1 WO2017194010 A1 WO 2017194010A1 CN 2017084214 W CN2017084214 W CN 2017084214W WO 2017194010 A1 WO2017194010 A1 WO 2017194010A1
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WIPO (PCT)
Prior art keywords
channel measurement
pilot signal
measurement reference
type
reference pilot
Prior art date
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Ceased
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PCT/CN2017/084214
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English (en)
Chinese (zh)
Inventor
陈艺戬
李儒岳
鲁照华
吴昊
李永
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ZTE Corp
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ZTE Corp
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Publication of WO2017194010A1 publication Critical patent/WO2017194010A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference

Definitions

  • This document relates to, but is not limited to, the field of communication technologies, and in particular, to a method and device for transmitting pilot information and a receiving method and apparatus.
  • the transmitting end In a wireless communication system, the transmitting end often takes multiple antennas to obtain a higher transmission rate. Multiple antennas can improve the signal-to-noise ratio and support more spatial multiplexing layers, compared to the open-loop multi-input multi-output (CSI) that does not use CSI (Channel State Information) information.
  • MIMO MIMO technology
  • MIMO technology using CSI information closed-loop MIMO precoding (Precoding) technology
  • Precoding closed-loop MIMO precoding
  • the core idea of the closed-loop MIMO precoding technology is that the receiving end feeds back channel information to the transmitting end, and the transmitting end uses some transmit precoding techniques according to the obtained channel information, which can greatly improve the transmission performance.
  • the transmitting end sends a downlink channel measurement pilot (CSI-RS (Channel State Information-Reference Signals)) to the receiving end.
  • CSI-RS Channel State Information-Reference Signals
  • each antenna transmits a channel measurement pilot signal.
  • the channel measurement pilot signals transmitted by different antennas are staggered in the time-frequency domain or the code domain, and the orthogonality can be maintained without mutual interference.
  • Each antenna corresponds to one CSI-RS port.
  • the channel measurement pilot is used to measure channel information.
  • the CSI-RS transmission of the maximum 8-antenna port on the base station side is supported in LTE-A (Long Term Evolution-Advanced).
  • the base station also sends RRC (Radio Resource Control) signaling to configure relevant location information and transmission period information of the CSI-RS.
  • RRC Radio Resource Control
  • the terminal receives the configuration information of the channel information measurement pilot CSI-RS transmitted by the base station side, and transmits and detects the CSI-RS pilot signal at the time-frequency resource position of each pilot port that is signaled, and each receiving antenna on the terminal side
  • the received CSI-RS pilot signal is obtained by the terminal, and the terminal and the base station perform the convention of transmitting the signal content of the pilot on each time-frequency resource location of each transmission port, so the terminal can accurately know the downlink pilot transmission signal, and then the terminal according to the terminal
  • the received pilot signal can perform downlink channel estimation to obtain downlink channel response information between the terminal side receiving antenna and the base station side transmitting antenna port. In the downlink channel estimation, it is necessary to consider the influence of noise and interference when the actual pilot signal is received.
  • LS Least Square
  • MMSE Minimum Mean Square Error
  • IRC Interference Rejection Combining
  • the terminal can estimate the channel response between the receiving antenna and the plurality of transmitting antenna ports according to the content of the transmitted pilot signal of each pilot port and the received pilot signal on each receiving antenna, so that the channel corresponding to each time-frequency resource location can be obtained.
  • the matrix in turn, can calculate optimal CSI information based on the channel matrix.
  • the CSI generally includes three types of PMI (Precoding Matrix Indicator)/CQI (Channel Quality Indicator)/RI (Rank Indicator) information, and the recommended precoding matrix and channel are respectively fed back to the base station. Quality information and number of transmission layers.
  • the terminal feeds back the calculated CQI/PMI/RI information to the base station through the control channel of the uplink physical layer or the data channel of the uplink physical layer.
  • the base station determines the number of transmission layers, determines the coding and modulation scheme, and determines the transmission precoding based on the feedback information of the terminal.
  • the downlink channel information measurement pilot CSI-RS plays a very important role in the acquisition of channel state information, which often affects the accuracy of precoding information, channel quality information and transmission layer number information, and thus the transmission performance of MIMO. Has a very big impact.
  • the downlink CSI-RS pilot used in the 4G standard is a periodic CSI-RS pilot.
  • the time domain considering that the channel change does not change abruptly, it has a certain time domain correlation, and the correlation time is greater than one subframe. The duration is 1 ms, so it is not necessary to transmit all the subframes.
  • the CSI-RS is generally sent periodically.
  • the so-called periodic pilot the concept is that the base station enters at a certain interval
  • the CSI-RS is transmitted, and the transmission position may have different subframe position offsets. The following describes the configuration of the CSI-RS period and the subframe offset in the LTE-A column.
  • the CSI-reference subframe configuration has the following structure:
  • the I CSI-RS is a configuration parameter of the CSI-RS, and the value is 0-154. Different values correspond to different CSI-RS periods and subframe offsets.
  • each CBR (Physical Resource Block) pair has a CSI-RS, and the same port (port) is transmitted in a different physical resource block pair (PRB pair). (style) the same.
  • the pattern of CSI-RS is shown in Figure 2.
  • the PRB pair can refer to the provisions in the LTE protocol 36.211. A typical case includes 12 frequency domain subcarriers and 14 time domain OFDM (Orthogonal Frequency Division Multiplexing) symbols.
  • the LTE system there are 40 REs (Resource Element) in a PRB pair that can be used as CSI-RS. It is divided into 5 patterns, and each pattern contains 8 REs, as shown in Figure 2 above.
  • the average CSI-RS pilot port occupies 1 RE in a PRB pair. All ports belonging to a CSI-RS resource need to be limited to a pattern #i shown in Figure 2.
  • the maximum number of ports supported by a CSI-RS is 8, so when the port is 8, there are five kinds of location candidates.
  • the number of ports is 4
  • the port t number there are 20 configurations.
  • the aperiodic CSI-RS is a pilot that is triggered by the base station, and the pilot can be dynamically triggered, sent for channel measurement of a specific UE (User Equipment) or a UE group, and exists in one or less In a few subframes, long-term continuous transmission is not performed, and the terminal (user equipment) transmits in a PDCCH (Physical Downlink Control Channel) or an Enhanced Physical Downlink Control Channel (ePDCCH).
  • PDCCH Physical Downlink Control Channel
  • ePDCCH Enhanced Physical Downlink Control Channel
  • the non-periodic pilot Compared with the periodic pilot, the non-periodic pilot has the advantage of more flexible configuration, and is very suitable for the UE specific (UE-specific) pilot configuration, so that different UEs can use different pilot port virtualization technologies to obtain more Good channel information feedback efficiency; when the number of users is small, the pilot overhead is smaller than the periodic pilot.
  • the parameters of the pilot transmission signal of the aperiodic CSI-RS may be pre-approved by the terminal with the base station or configured by the base station high-level signaling, where The upper layer refers to a layer above the physical layer, for example, an RRC (Radio Resource Control) layer.
  • RRC Radio Resource Control
  • the aperiodic CSI-RS is generally pre-coded pilot and is oriented to a specific user or group of users, rather than to all users in the cell.
  • the aperiodic CSI-RS can effectively reduce the number of ports during measurement by supporting precoding. Reduce the amount of calculation of CSI feedback.
  • the pilots of each user are different, the pilots cannot share the pilots like the periodic pilots, and the resource utilization decreases when the number of users is large.
  • This document provides a method and apparatus for transmitting pilot information and a receiving method and apparatus, which can improve the utilization of pilot resources.
  • the embodiment of the invention provides a method for transmitting pilot information, which is applied to a transmitting end, and the method includes:
  • Determining a second type of channel measurement reference pilot signal that interferes with the first type of channel measurement reference pilot signal Determining a second type of channel measurement reference pilot signal that interferes with the first type of channel measurement reference pilot signal; and transmitting, to the receiving end, parameter information of the second type of channel measurement reference pilot signal;
  • the first type of channel measurement reference pilot signal is used by the receiving end to perform channel measurement
  • the second type of channel measurement reference pilot signal is used to measure a part of the reference pilot signal of the first type of channel or All ports generate interference.
  • the parameter of the second type channel measurement reference pilot signal includes at least one of the following parameters:
  • the method further includes:
  • the configuring, by the receiving end, the first type of channel measurement reference pilot signal including:
  • the transmission resources of the first type channel measurement reference pilot signal configured for the receiving end are divided into N groups, and N is greater than or equal to 1;
  • Determining a second type of channel measurement reference pilot signal that causes interference to the first type of channel measurement reference pilot signal including:
  • the sending resource of the first type of channel measurement reference pilot signal includes: sending the The first type of channel measures the time-frequency location resource of the reference pilot signal.
  • the receiving end includes: a user equipment; and the sending end includes: a base station.
  • the embodiment of the invention provides a device for transmitting pilot information, which is applied to a transmitting end, and includes:
  • a first configuration module configured to configure a first type of channel measurement reference pilot signal for the receiving end
  • a second configuration module configured to determine a second type of channel measurement reference pilot signal that interferes with the first type of channel measurement reference pilot signal; and send the second type of channel measurement reference pilot signal to the receiver Parameter information;
  • the first type of channel measurement reference pilot signal is used by the receiving end to perform channel measurement
  • the second type of channel measurement reference pilot signal is used to measure a part of the reference pilot signal of the first type of channel or All ports generate interference.
  • the parameter of the second type channel measurement reference pilot signal includes at least one of the following parameters:
  • the second configuration module is further configured to send, to the receiving end, a set number K of the second type channel measurement reference pilot signal, where the K is greater than or equal to 1; and/or send the K set to the receiving end.
  • the class channel measurement reference pilot signal respectively corresponds to the interference channel information of the first type channel measurement reference pilot signal.
  • the first configuration module is configured to configure the first type of channel measurement reference pilot signal for the receiving end by:
  • the transmission resources of the first type channel measurement reference pilot signal configured for the receiving end are divided into N groups, and N is greater than or equal to 1;
  • a second configuration module is configured to determine a second type of channel measurement reference pilot signal that interferes with the first type of channel measurement reference pilot signal in the following manner:
  • the receiving end includes: a user equipment; and the sending end includes: a base station.
  • the embodiment of the invention provides a method for receiving pilot information, which is applied to a receiving end, and the method includes:
  • the first type of channel measurement reference pilot signal is used by the receiving end to perform channel measurement
  • the second type of channel measurement reference pilot signal is used to measure a part of the reference pilot signal of the first type of channel or All ports generate interference.
  • the parameter of the second type channel measurement reference pilot signal includes at least one of the following parameters:
  • the method further includes:
  • the interference port information of the first type channel measurement reference pilot signal corresponding to the K sets of the second type channel measurement reference pilot signals respectively sent by the transmitting end is received.
  • the receiving, by the receiving end, the configuration information of the first type of channel measurement reference pilot signal including:
  • the configuration information of the second type of channel measurement reference pilot signal that generates interference on the first type of channel measurement reference pilot signal including:
  • the sending resource of the first type of channel measurement reference pilot signal includes: sending the The first type of channel measures the time-frequency location resource of the reference pilot signal.
  • the receiving end includes: a user equipment; and the sending end includes: a base station.
  • the embodiment of the invention provides a device for receiving pilot information, which is applied to a receiving end, and includes:
  • a first receiving module configured to receive configuration information of a first type of channel measurement reference pilot signal configured by the transmitting end
  • a second receiving module configured to receive configuration information of a second type of channel measurement reference pilot signal that generates interference on the first type of channel measurement reference pilot signal
  • the first type of channel measurement reference pilot signal is used by the receiving end to perform channel measurement
  • the second type of channel measurement reference pilot signal is used to measure a part of the reference pilot signal of the first type of channel or All ports generate interference.
  • the parameter of the second type channel measurement reference pilot signal includes at least one of the following parameters:
  • the second receiving module is further configured to receive a set number K of the second type channel measurement reference pilot signal sent by the sending end, where the K is greater than or equal to 1; and/or receive the K set second sent by the transmitting end.
  • the class channel measurement reference pilot signal respectively corresponds to the interference channel information of the first type channel measurement reference pilot signal.
  • the first receiving module is configured to receive configuration information of the first type channel measurement reference pilot signal configured by the sending end in the following manner:
  • the second receiving module is configured to receive configuration information of the second type channel measurement reference pilot signal that generates interference on the first type channel measurement reference pilot signal in the following manner:
  • the receiving end includes: a user equipment; and the sending end includes: a base station.
  • the embodiment of the invention provides a method for transmitting pilot information, which is applied to a transmitting end, and the method includes:
  • the method further includes:
  • determining a channel measurement reference pilot signal configured for the receiving end including:
  • One port is selected from the port set P, and the ports in the port set P are multiplexed in a code division manner.
  • the port set P is ⁇ port 15, port 16 ⁇ ;
  • the port 15 and the port 16 are ports of a channel state information measurement reference signal in a Long Term Evolution (LTE) system;
  • the port selection information is notified to the receiving end by high layer or physical layer signaling.
  • the receiving end includes: a user equipment; and the sending end includes: a base station.
  • the embodiment of the invention provides a device for transmitting pilot information, which is applied to a transmitting end, and includes:
  • a configuration module configured to determine a channel measurement reference pilot signal configured for the receiving end
  • a sending module configured to send the number of ports of the channel measurement reference pilot signal to the receiving end.
  • the sending module is further configured to send, to the receiving end, a port number of the channel measurement reference pilot signal.
  • the configuration module is configured to determine a channel measurement reference pilot signal configured for the receiving end in the following manner:
  • One port is selected from the port set P, and the ports in the port set P are multiplexed in a code division manner.
  • the port set P is ⁇ port 15, port 16 ⁇ ;
  • the port 15 and the port 16 are channel state information measurement parameters in a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • the port selection information is notified to the receiving end by high layer or physical layer signaling.
  • the receiving end includes: a user equipment; and the sending end includes: a base station.
  • the embodiment of the invention provides a method for receiving pilot information, which is applied to a receiving end, and the method includes:
  • the port number is determined according to physical layer configuration signaling, high layer configuration signaling, or blind detection.
  • determining a port number according to physical layer configuration signaling, high layer configuration signaling, or blind detection including:
  • One port is selected from the port set P, and the ports in the port set P are multiplexed in a code division manner.
  • the port set P is ⁇ port 15, port 16 ⁇ ;
  • the port 15 and port 16 are ports of a channel state information measurement reference signal in a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • the receiving end includes: a user equipment; and the sending end includes: a base station.
  • the embodiment of the invention provides a device for receiving pilot information, which is applied to a receiving end, and includes:
  • a first acquiring module configured to determine a number of ports of the channel measurement reference pilot signal configured by the transmitting end
  • the second obtaining module is configured to determine the port number according to physical layer configuration signaling, high layer configuration signaling, or blind detection.
  • the second obtaining module is configured to determine the port number according to physical layer configuration signaling, high layer configuration signaling, or blind detection in the following manner:
  • one port is selected from the port set P, and the ports in the port set P are multiplexed in a code division manner.
  • the port set P is ⁇ port 15, port 16 ⁇ ;
  • the port 15 and the port 16 are channel state information measurement parameters in a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • the receiving end includes: a user equipment; and the sending end includes: a base station.
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, which are implemented when executed by a processor.
  • the base station can notify the terminal of the interference pilot information when the pilot signal is spatially multiplexed, so that the terminal can enable the terminal to Interference cancellation is performed when the pilot signal is received, thereby improving pilot resource utilization.
  • the pilot resource is flexibly configured to improve the utilization of pilot resources.
  • FIG. 1 is a schematic diagram of subframe position transmission corresponding to a CSI-RS configuration example in LTE in the background art.
  • FIG. 2 is a schematic diagram of a CSI-RS Pattern in LTE in the background art.
  • FIG. 3 is a flowchart of a method (transmitting end) for transmitting pilot information according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a method (transmitting end) for transmitting pilot information according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of another method (receiving end) for receiving pilot information according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of another method (receiving end) for receiving pilot information according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a transmitting device (transmitting end) of pilot information according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a receiving device (receiving end) of pilot information according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of another transmitting device (transmitting end) of pilot information according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of another receiving device (receiving end) of pilot information according to an embodiment of the present invention.
  • Figure 11-a is a schematic diagram of pilot interference (two pilot signals) in Example 1 of the present invention.
  • Figure 11-b is a schematic diagram of pilot interference (three pilot signals) in Example 1 of the present invention.
  • Figure 12 is a schematic diagram of pilot interference in Example 3 of the present invention.
  • an embodiment of the present invention provides a method for transmitting pilot information, which is applied to a transmitting end, and the method includes:
  • the first type of channel measurement reference pilot signal is used by the receiving end to perform channel measurement
  • the second type of channel measurement reference pilot signal is used to measure a part of the reference pilot signal of the first type of channel or All ports generate interference
  • the first type of channel measurement reference pilot signal includes one or more ports
  • the parameter of the second type channel measurement reference pilot signal includes at least one of the following parameters:
  • the number K of the second type channel measurement reference pilot signal is sent to the receiving end, where the K is greater than or equal to 1;
  • the first type channel measurement reference pilot signal is configured for the receiving end, and includes:
  • the transmission resources of the first type channel measurement reference pilot signal configured for the receiving end are divided into N groups, and N is greater than or equal to 1;
  • the determining, by the determining, the second type of channel measurement reference pilot signal that interferes with the first type of channel measurement reference pilot signal includes:
  • the transmitting resource of the first type of channel measurement reference pilot signal includes: transmitting a time-frequency location resource of the first type channel measurement reference pilot signal;
  • the first type of channel measurement reference pilot signal is a downlink precoding measurement reference pilot signal
  • the receiving end includes: a user equipment; the sending end includes: a base station;
  • an embodiment of the present invention provides a method for transmitting pilot information, which is applied to a transmitting end, and the method includes:
  • the method further includes:
  • the channel measurement reference pilot signal configured for the receiving end is determined to include:
  • the method further includes:
  • the port selection information includes: a port number
  • the port set P is ⁇ port 15, port 16 ⁇ ;
  • the port set P is ⁇ port 15, port 16, port 17, port 18 ⁇ ;
  • the port 15 and the port 16 are ports of a channel state information measurement reference signal in a Long Term Evolution (LTE) system;
  • the port selection information is notified to the receiving end by high layer or physical layer signaling;
  • the high layer signaling is, for example, RRC (Radio Resource Control) signaling;
  • the receiving end includes: a user equipment; the sending end includes: a base station;
  • an embodiment of the present invention provides a method for receiving pilot information, which is applied to a receiving end, and the method includes:
  • S520 Receive configuration information of a second type of channel measurement reference pilot signal that generates interference on the first type of channel measurement reference pilot signal.
  • the first type of channel measurement reference pilot signal is used by the receiving end to perform channel measurement
  • the second type of channel measurement reference pilot signal is used to measure a part of the reference pilot signal of the first type of channel or All ports generate interference
  • the first type of channel measurement reference pilot signal includes one or more ports
  • the parameter of the second type channel measurement reference pilot signal includes at least one of the following parameters:
  • the method further includes:
  • the interference port information of the first type channel measurement reference pilot signal corresponding to the K sets of the second type channel measurement reference pilot signals respectively sent by the transmitting end is received.
  • the configuration information of the first type channel measurement reference pilot signal configured by the receiving and sending end includes:
  • the configuration information of the second type of channel measurement reference pilot signal that generates interference on the first type of channel measurement reference pilot signal including:
  • the transmitting resource of the first type of channel measurement reference pilot signal includes: transmitting a time-frequency location resource of the first type channel measurement reference pilot signal;
  • the first type of channel measurement reference pilot signal is a downlink precoding measurement reference pilot signal
  • the receiving end includes: a user equipment; the sending end includes: a base station;
  • the embodiment of the present invention provides a method for receiving pilot information, which is applied to a receiving end, and the method includes:
  • S620 Determine a port number according to physical layer configuration signaling, high layer configuration signaling, or blind detection.
  • the method further includes:
  • the port number is determined according to physical layer configuration signaling, high layer configuration signaling, or blind detection, including:
  • the port set P is ⁇ port 15, port 16 ⁇ ;
  • the port 15 and the port 16 are ports of a channel state information measurement reference signal in a Long Term Evolution (LTE) system;
  • the high layer signaling is, for example, RRC signaling
  • the receiving end includes: a user equipment; the sending end includes: a base station;
  • an embodiment of the present invention provides a device for transmitting pilot information, which is applied to Sending end, including:
  • the first configuration module 701 is configured to configure a first type of channel measurement reference pilot signal for the receiving end;
  • a second configuration module 702 configured to determine a second type of channel measurement reference pilot signal that interferes with the first type of channel measurement reference pilot signal; and send the second type of channel measurement reference pilot to the receiver Parameter information of the signal;
  • the first type of channel measurement reference pilot signal is used by the receiving end to perform channel measurement
  • the second type of channel measurement reference pilot signal is used to measure a part of the reference pilot signal of the first type of channel or All ports generate interference.
  • the parameter of the second type channel measurement reference pilot signal includes at least one of the following parameters:
  • the second configuration module is further configured to send, to the receiving end, a set number K of the second type channel measurement reference pilot signal, where the K is greater than or equal to 1; and/or send a K set second type channel to the receiving end.
  • the interference port information of the first type channel measurement reference pilot signal corresponding to the reference pilot signal is respectively measured.
  • the first configuration module is configured to configure the first type of channel measurement reference pilot signal for the receiving end by using the following manner:
  • the transmission resources of the first type channel measurement reference pilot signal configured for the receiving end are divided into N groups, and N is greater than or equal to 1;
  • a second configuration module is configured to determine a second type of channel measurement reference pilot signal that interferes with the first type of channel measurement reference pilot signal in the following manner:
  • the receiving end includes: a user equipment; and the sending end includes: a base station.
  • the first type of channel measurement reference pilot signal is a downlink precoding measurement reference pilot signal. number.
  • an embodiment of the present invention provides a device for receiving pilot information, which is applied to a receiving end, and includes:
  • the first receiving module 801 is configured to receive configuration information of the first type channel measurement reference pilot signal configured by the transmitting end;
  • the second receiving module 802 is configured to receive configuration information of a second type of channel measurement reference pilot signal that generates interference on the first type of channel measurement reference pilot signal;
  • the first type of channel measurement reference pilot signal is used by the receiving end to perform channel measurement
  • the second type of channel measurement reference pilot signal is used to measure a part of the reference pilot signal of the first type of channel or All ports generate interference.
  • the parameter of the second type channel measurement reference pilot signal includes at least one of the following parameters:
  • the second receiving module is further configured to receive a set number K of the second type channel measurement reference pilot signal sent by the transmitting end, where the K is greater than or equal to 1; and/or receive the K set second type channel sent by the transmitting end.
  • the interference port information of the first type channel measurement reference pilot signal corresponding to the reference pilot signal is respectively measured.
  • the first receiving module is configured to receive configuration information of the first type channel measurement reference pilot signal configured by the sending end in the following manner:
  • the second receiving module is configured to receive configuration information of the second type channel measurement reference pilot signal that generates interference on the first type channel measurement reference pilot signal in the following manner:
  • the receiving end includes: a user equipment; and the sending end includes: a base station.
  • the first type of channel measurement reference pilot signal is a downlink precoding measurement reference pilot signal.
  • an embodiment of the present invention provides a device for transmitting pilot information, which is applied to a transmitting end, and includes:
  • the configuration module 901 is configured to determine a channel measurement reference pilot signal configured for the receiving end;
  • the sending module 902 is configured to send the number n of ports of the channel measurement reference pilot signal to the receiving end.
  • the sending module is further configured to send a port number of the channel measurement reference pilot signal to the receiving end.
  • the configuration module is configured to determine a channel measurement reference pilot signal configured for the receiving end by using the following manner:
  • the port set P is ⁇ port 15, port 16 ⁇ ;
  • the port 15 and the port 16 are ports of a channel state information measurement reference signal in a Long Term Evolution (LTE) system;
  • the port selection information is notified to the receiving end by high layer or physical layer signaling.
  • the high layer signaling is, for example, RRC signaling
  • the receiving end includes: a user equipment; and the sending end includes: a base station.
  • an embodiment of the present invention provides a device for receiving pilot information, which is applied to a receiving end, and includes:
  • the first obtaining module 1001 is configured to determine a port number n of a channel measurement reference pilot signal configured by the transmitting end;
  • the second obtaining module 1002 is configured to determine a port number according to physical layer configuration signaling, high layer configuration signaling, or blind detection.
  • the second obtaining module is configured to determine a port number according to physical layer configuration signaling, high layer configuration signaling, or blind detection in the following manner:
  • the port set P is ⁇ port 15, port 16 ⁇ ;
  • the port 15 and port 16 are ports of a channel state information measurement reference signal in a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • the high layer signaling is, for example, RRC signaling
  • the receiving end includes: a user equipment; and the sending end includes: a base station.
  • This example mainly introduces the interference notification technology for measuring pilots. It can multiplex some pilot ports or pilot port groups with better spatial orthogonality. For example, multiple users in the system need to perform precoding based pilot measurements.
  • Channel measurement assuming UE1, UE2, ... UEm, respectively corresponding to the port group g1, g2 ... gm of the channel measurement, find some pilots, and there is similarity between these pilots similar to Figure 11-a or Figure 11-b
  • the better orthogonality shown in the figure But in fact, the complete non-interference is almost non-existent, and the pilot is different from the data.
  • the data can be multi-user pre-coded at the transmitting end according to the information of the channel to eliminate interference.
  • the pilot here cannot be interfered by these means.
  • the unknownness of the channel information does not support the interference cancellation at the transmitting end, and on the other hand, the interference cancellation at the transmitting end affects the accuracy of the channel measurement. Therefore, the present invention contemplates the elimination of interference at the receiving end.
  • precoding CSI-RS i as the first type of measurement pilot for channel measurement
  • precoding CSI-RS j and / or CSI-RS k can be defined as a second type of measurement pilot, and the second type of measurement pilot potentially interferes with the first type of measurement pilot
  • CSI-RS i is separately configured
  • the information and some or all of the information of CSI-RS j and/or CSI-RS k are given to the terminal.
  • the information of the second type of measurement pilot CSI-RS j and/or CSI-RS k notified by the base station to the user terminal may include at least one of the following a-f information:
  • a) transmit power indication information used to indicate the pilot transmit power of the CSI-RS j and/or the CSI-RS k, which may be the power relative to the first type of measurement pilot CSI-RS i; or may be the absolute value of the power
  • sequence parameter indication information used to indicate sequence information, so that the terminal knows the source sequence information of the interference pilot, and performs interference cancellation
  • orthogonal code length indication information indicating a code division multiplexing length used by pilots of CSI-RS j and/or CSI-RS k;
  • pilot density indication information used to indicate the density of the pilot port of CSI-RS j and/or CSI-RS k, such as 1RE/port/RB or 0.5RE/port/RB;
  • port number indication information indicating the number of ports of the pilot of CSI-RS j and/or CSI-RS k so that it determines the size of the interfered area
  • pilot pattern indication information indicating the location of the pilot of the CSI-RS j and/or CSI-RS k to determine the specific location to be interfered with
  • precoding CSI-RS is the main application scenario, the non-precoded CSI-RS is equally applicable.
  • the number K of the second type of measurement pilots is mainly exemplified by one or two cases, and in fact, is not limited to a maximum of two, and can be flexibly determined according to the situation;
  • the pilot interference scenario of Figure 12 may also occur: different transmission resource groups correspond to different second type of measurement pilot signals.
  • the base station needs to consider some or all of the transmission resources of the first type of measurement pilots.
  • the group separately reports the corresponding type 2 measurement pilot information that generates interference.
  • the division manner of the transmission resource group may be based on time-frequency resource division or partitioned based on the port number.
  • the terminal detects configuration signaling to obtain information about the first type of measurement pilots and the second type of measurement pilots. After obtaining the above information, the terminal may use some existing interference cancellation methods to suppress interference, for example, if the information can be learned
  • the interference pilot sequence can extract the interference signal by using the correlation of the sequence and subtract the interference signal from the received signal.
  • the CSI-RS port adopts a code division mode.
  • the base station first determines the channel measurement reference pilot configured for the terminal. If the number of ports is 1, the information of the port index selection needs to be notified.
  • a typical case is to configure multiple sets of ports.
  • the case where the pilot of 1 performs the CSI-RS selection; the base station can support the port index selection information through the high layer signaling; for example, 1 bit indicates the port 15 of the code division multiplexing or 16; and can also indicate through the physical layer signaling;
  • there are more pilot code division multiplexing such as port 15, 16, 17, 18, which can also be used to indicate a specific port index by signaling.
  • the terminal may also determine the port index by performing blind detection on the port included in the set, and perform channel measurement, port collection. It can be ⁇ port15,16 ⁇ or ⁇ port15,16,17,18 ⁇ .
  • an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, which are implemented when executed by a processor.
  • the base station can notify the terminal of the interference pilot information when the pilot signal is spatially multiplexed, so that the terminal can perform interference cancellation when receiving the pilot signal, thereby improving the utilization of the pilot resource.
  • the pilot resource is flexibly configured to improve the utilization of pilot resources.
  • computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules or other data. Sex, removable and non-removable media.
  • Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer.
  • communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .
  • the base station notifies the terminal of the interference pilot information when the pilot signal is spatially multiplexed, so that the terminal can perform interference cancellation when receiving the pilot signal, thereby improving the utilization of the pilot resource.
  • the pilot resource is flexibly configured to improve the utilization of pilot resources.

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

Abstract

L'invention concerne un procédé et un dispositif de transmission d'informations pilotes, et un procédé et un dispositif de réception d'informations pilotes. Le procédé de transmission d'informations pilotes appliqué à une extrémité de transmission consiste : à configurer un premier type de signal pilote de référence de mesure de canal pour une extrémité réceptrice; à déterminer un deuxième type de signal pilote de référence de mesure de canal qui interfère avec le premier type de signal pilote de référence de mesure de canal; et à transmettre des informations de paramètres du deuxième type de signal pilote de référence de mesure de canal à l'extrémité réceptrice. Le premier type de signal pilote de référence de mesure de canal sert à procéder à une mesure de canal sur l'extrémité réceptrice, et le deuxième type de signal pilote de référence de mesure de canal peut produire une interférence sur tout ou partie des ports du premier type de signal pilote de référence de mesure de canal.
PCT/CN2017/084214 2016-05-13 2017-05-12 Procédé et dispositif de transmission d'informations pilotes, et procédé et dispositif de réception d'informations pilotes Ceased WO2017194010A1 (fr)

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