WO2019196870A1 - 一种参考信号的传输方法及装置 - Google Patents

一种参考信号的传输方法及装置 Download PDF

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Publication number
WO2019196870A1
WO2019196870A1 PCT/CN2019/082081 CN2019082081W WO2019196870A1 WO 2019196870 A1 WO2019196870 A1 WO 2019196870A1 CN 2019082081 W CN2019082081 W CN 2019082081W WO 2019196870 A1 WO2019196870 A1 WO 2019196870A1
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Prior art keywords
node
reference signal
port
data signal
configuration message
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PCT/CN2019/082081
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English (en)
French (fr)
Inventor
刘凤威
陈磊
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华为技术有限公司
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Priority to EP19784889.8A priority Critical patent/EP3754886A4/en
Publication of WO2019196870A1 publication Critical patent/WO2019196870A1/zh
Priority to US17/037,407 priority patent/US20210014016A1/en

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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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    • H—ELECTRICITY
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    • H—ELECTRICITY
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    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
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    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
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    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting a reference signal.
  • RNs relay nodes
  • the relay node has poor transceiver isolation and therefore has a half-duplex constraint. That is, when the relay node receives the downlink backhaul link of the upper node, it cannot send the downlink access (or backhaul) link to the lower node; when the relay node sends the uplink backhaul link to the upper node, it cannot Receive an uplink access (or backhaul) link from a lower node.
  • a method for improving the spectral efficiency is to adopt a space division multiple access (SDMA) scheme, that is, when the relay node receives the downlink backhaul link of the upper node, and simultaneously receives the downlink node from the lower node.
  • SDMA space division multiple access
  • Uplink access (or backhaul) link or when the relay node sends an uplink backhaul link to the upper node, and simultaneously sends a downlink access (or backhaul) link to the lower node.
  • the RN can simultaneously transmit data to the base station and user equipment (UE).
  • UE user equipment
  • the data transmission process of the downlink access link interferes with the data transmission process of the uplink access link. Since the data transmission of the downlink access link is scheduled by the relay node, it is difficult for the base station to obtain the specific scheduling information of the downlink access link, and it is difficult to know the interference of the downlink access link to the uplink backhaul link.
  • the embodiment of the present invention provides a method and a device for transmitting a reference signal, which are used to implement a relay node to transmit a reference signal to a base station, so that the base station obtains a downlink access link to an uplink backhaul link based on channel measurement of the reference signal. interference.
  • an embodiment of the present application provides a method for transmitting a reference signal, where the method includes the following steps:
  • the first node receives a first configuration message sent by the second node, where the first configuration message carries resource information for transmitting the first reference signal.
  • the first node sends the first reference signal by using a first port according to the first configuration message.
  • the first node sends a first data signal to the third node through the second port.
  • the first port and the second port are the same port or have an antenna port quasi-co-location QCL relationship, the first node is a relay node, and the second node is a superior node of the first node. .
  • the first port used by the first node to send the first reference signal to the second node and the second port used by the first node to transmit the first data signal to the third node are the same port or satisfy the antenna port QCL. Relationship, so that the first node sends the first reference signal through the first port, so that the first node can simultaneously transmit data to the second node and the third node (for example, the first node adopts the SDMA method to the second node and the In the scenario where the three nodes transmit data, the first node transmits data to the third node through the second port, and the second node determines the subsequent first node by performing channel measurement on the received first reference signal.
  • the second node may configure an uplink transmission parameter, such as an MCS, for the first node according to the channel measurement result of the first reference signal, and the first node may send the fourth data signal to the second node according to the configured uplink transmission parameter, and pass the second The port transmits a first data signal to the third node. Since the uplink transmission parameter configured by the second node for the first node has taken into account the interference of the first data signal with the fourth data signal, the first node sends the fourth data signal based on the uplink transmission parameter configured by the second node. Sending the first data signal not only improves the spectral efficiency, but also reduces the block error rate of the uplink data transmission.
  • an uplink transmission parameter such as an MCS
  • the second node may determine, according to the channel measurement result of the first reference signal, the data signal transmitted by the first node to the third node, and transmit the first node to the second node.
  • the interference of the data signal is used to determine the interference of the link between the first node and the third node to the link between the first node and the second node.
  • the second node is a superior node of the first node, and thus the link of the first node to the second node may be referred to as a backhaul link.
  • the link between the first node and the third node may be a backhaul link or an access chain. road.
  • the solution provided by the embodiment of the present application may determine the backhaul link between the first node and the third node to the back link between the first node and the second node.
  • the solution provided by the embodiment of the present application may determine the return link between the access node of the first node and the third node to the first node and the second node. Interference.
  • the first reference signal may be the sounding reference signal SRS.
  • the second node may determine interference of the first data signal with the fourth data signal based on a channel measurement result of the SRS.
  • the second node may adopt different processing manners based on different channel measurement results of the second reference signal by the second node.
  • the first node can also adopt different processing methods.
  • the transmitting, by the first node, the first data signal to the third node is only one of the processing modes.
  • the second node determines an uplink transmission parameter of the fourth data signal based on the channel measurement result of the first reference signal and notifies the first node by scheduling signaling.
  • the first node sends a fourth data signal to the second node according to the scheduling signaling, and sends the first data signal to the third node through the second port.
  • scheduling signaling is generally sent through DCI.
  • the second node may further send a first indication message to the first node to indicate that the first node is used to transmit the first data signal.
  • the first space division multiplexing time slot does not communicate with the third node.
  • the first node does not send the first data signal to the third node on the first space division multiplexing time slot, so as to avoid uplink data of the first data signal sent to the first node.
  • the transmission generates a large interference, thereby avoiding the deterioration of the block error rate performance of the uplink backhaul link of the first node.
  • the first indication message can be sent by using the DCI.
  • the first space division multiplexing time slot is a time slot in which the first node can simultaneously transmit data to the second node and the third node. That is to say, in the embodiment of the present application, the time slot used by the first node to transmit the fourth data signal to the second node may be multiplexed to the third node.
  • the first node may send a first data signal to the third node on the time slot, where the time slot is the first space division multiplexing time slot.
  • the second node may further send a third indication message to the first node to indicate that the first node does not communicate with the third node.
  • the interference of the first data signal to the fourth data signal is greater, and the second node directly rejects the possibility of the third node communicating with the first node based on the interference condition, thereby avoiding the first node and
  • the communication of the third node causes a large interference to the uplink backhaul link between the first node and the second node.
  • the third indication message may be sent by using the MAC CE or the RRC signaling.
  • the transmit power of the first reference signal is the same as the transmit power of the first data signal; or the transmit power of the first reference signal and the transmit power of the first data signal The difference is the specified value.
  • the second node When the second node performs channel measurement on the first reference signal, if the transmit power of the first reference signal is the same as the transmit power of the first data signal, the second node determines, according to the channel measurement result of the first reference signal, the first The interference of the data signal to the fourth data signal is more accurate.
  • the second node may also obtain the difference between the transmit power of the first reference signal and the transmit power of the first data signal. The interference of the first data signal with the fourth data signal is accurately determined.
  • the first configuration message is further used to indicate a correspondence between a first space division multiplexing time slot for transmitting the first data signal and the first reference signal.
  • the channel measurement of the first reference signal is actually to determine the interference of the first data signal with the fourth data signal in the scenario in which the subsequent first node simultaneously transmits data to the second node and the third node. Then, the first node and the second node need to agree on the slot position occupied by the first data signal corresponding to the first reference signal: the first node needs to know the time slot corresponding to the first reference signal, so as to determine the first Transmitting parameters such as precoding of the reference signal, so that the transmitting parameter of the first reference signal is consistent with the transmitting parameter of the first data signal; the second node needs to determine the position of the time slot to be measured, that is, the second node needs to determine that the first node can simultaneously
  • the time slot for transmitting data to the second node and the third node is such that the information obtained by performing channel measurement on the first reference signal can be applied to the configuration of the uplink transmission parameter (such as MCS) of the time slot.
  • the time slot in which the first node transmits the first data signal is referred to as a first space division multiplexing time slot.
  • the correspondence between the first space division multiplexing time slot and the first reference signal is required. determine.
  • the corresponding relationship between the first spatial multiplexing multiplexed time slot and the first reference signal may be understood as follows: the first reference signal is used to measure interference caused by the first data signal on the uplink backhaul link, and then the first reference signal is The first data signal has a corresponding relationship; and the first data signal is sent after the first reference signal is sent, and the time slot (or the time slot position) for transmitting the first data signal also has a corresponding relationship with the first data signal.
  • the slot is referred to as a first space division multiplex slot. Therefore, the first space division multiplexing time slot and the first reference signal also have a corresponding relationship. Only when the corresponding relationship is determined, it can be known which time slot (or time slot position) the measurement result obtained according to the first reference signal is applicable to. ).
  • first spatial multiplexing multiplexed time slot and the first reference signal may be configured by using the first configuration message, and may be configured by using other configuration messages, which is not specifically limited in this embodiment.
  • the first space division multiplex slot for transmitting the first data signal can be configured based on the request of the first node. For example, the first node sends a first request message to the second node, where the first request message is used to request to allocate the first space division multiplexing time slot; the first node receives the second node Sending a second configuration message, where the second configuration message carries indication information of the first space division multiplexing time slot.
  • the third node and other nodes may communicate with the first node in a multiplexing manner such as frequency division multiplexing, space division multiplexing, time division multiplexing, or code division multiplexing.
  • the first reference signal sent by the first node to the second node may be used to measure the interference of the first data signal sent by the first node to the third node to the fourth data signal, and may also be used to measure the first node direction.
  • the third node and the fourth node perform data transmission with the first node by using frequency division or space division multiplexing.
  • the first node may pass the second port. Sending a second data signal to the fourth node, where the first data signal and the second data signal are transmitted by using frequency division or space division multiplexing.
  • the first reference signal is frequency selective precoded.
  • the first configuration message may be configured to allocate resources of other reference signals in addition to resources for configuring the first reference signal.
  • the first configuration message carries resource information for transmitting a second reference signal
  • the method further includes: the first node sending, by using the third port, according to the first configuration message.
  • the second reference signal is sent by the first node to the fifth node through the fourth port, where the third port and the fourth port are the same port or have an antenna port QCL relationship.
  • the resource information of the second reference signal may be configured by using the first configuration message, or may be configured by using other configuration messages, which is not specifically limited in this embodiment.
  • the foregoing solution may also be extended to a scenario of more reference signals, that is, the reference signal resources configured by the first node based on the first configuration message may send multiple reference signals, and the second node may be based on channel measurement results of multiple reference signals.
  • the interference of the data transmitted between the plurality of nodes and the first node to the data transmitted by the first node to the second node is determined separately.
  • the first configuration message is further configured to indicate a correspondence between a second space division multiplexing time slot for transmitting the third data signal and the second reference signal, so that the first node and the second node The node agrees on the slot position occupied by the third data signal corresponding to the second reference signal.
  • the second space division multiplexing time slot is a time slot in which the first node can simultaneously transmit data to the second node and the fifth node. That is to say, in the embodiment of the present application, the time slot used by the first node to transmit the fifth data signal to the second node may be multiplexed to the fifth node.
  • the first node may send a third data signal to the fifth node on the time slot, where the time slot is the second space division multiplexing time slot.
  • the relationship between the second space division multiplexing time slot and the second reference signal may be understood as follows: the second reference signal is used to measure the interference caused by the third data signal on the uplink backhaul link, then the second reference signal and the second reference signal There is a corresponding relationship between the three data signals; and the third data signal is sent after the second reference signal is transmitted, and the time slot (or the slot position) of the third data signal is also associated with the third data signal, and the time slot is also associated with the third data signal. It is called the second space division multiplexing slot. Therefore, the second spatial multiplexing multiplexed time slot and the second reference signal also have a corresponding relationship. Only when the corresponding relationship is determined, it can be known which time slot (or time slot position) the measurement result obtained according to the second reference signal is applicable to. ).
  • the second space division multiplexing time slot may also be configured by the second node based on the request of the first node. For example, the first node sends a second request message to the second node, where the second request message is used to request to allocate a second space division multiplexing time slot; the first node receives the second node sending The third configuration message carries the indication information of the second space division multiplexing time slot.
  • the second request message and the first request message may be the same message, or may be different messages.
  • the second node may adopt different processing manners based on different channel measurement results of the second reference signal by the second node.
  • the first node can also adopt different processing methods.
  • the transmitting, by the first node, the third data signal to the fifth node is only one of the processing modes.
  • the second node determines an uplink transmission parameter of the fifth data signal based on the channel measurement result of the second reference signal and notifies the first node by scheduling signaling.
  • the first node sends a fifth data signal to the second node according to the scheduling signaling, and sends the third data signal to the fifth node through the second port.
  • scheduling signaling is generally sent through DCI.
  • the second node may further send a second indication message to the first node to indicate that the first node is used to transmit the third data signal.
  • the second space division multiplexing time slot does not communicate with the fifth node.
  • the first node does not send the third data signal to the fifth node on the second space division multiplexing time slot, thereby avoiding the uplink data of the third data signal sent to the first node.
  • the transmission generates a large interference, thereby avoiding the deterioration of the block error rate performance of the uplink backhaul link of the first node.
  • the second indication message can be sent by using the DCI.
  • the second node may further send a fourth indication message to the first node to indicate that the first node does not communicate with the fifth node.
  • the third data signal has a greater interference to the fifth data signal, and the second node directly rejects the possibility of the fifth node communicating with the first node based on the interference condition, thereby avoiding the first node and The communication of the fifth node generates a large interference to the uplink backhaul link between the first node and the second node.
  • the fourth indication message may be sent by DCI, MAC CE or RRC signaling.
  • an embodiment of the present application provides a method for transmitting a reference signal, where the method includes the following steps:
  • the second node sends a first configuration message to the first node, where the first configuration message carries resource information for transmitting the first reference signal.
  • the second node receives the first reference signal that is sent by the first node according to the first configuration message and is sent by the first port, where the first port and the second port are the same port or have an antenna port
  • the second port is a port for the first node to send a first data signal to the third node, the first node is a relay node, and the second node is a superior of the first node. node.
  • the second node performs channel measurement on the first reference signal.
  • the first port used by the first node to send the first reference signal to the second node and the second port used by the first node to transmit the first data signal to the third node are the same port or satisfy the antenna port QCL. Relationship, so that the first node sends the first reference signal through the first port, that is, in the scenario that the first node simultaneously transmits data to the second node and the third node, the first node transmits to the third node through the second port.
  • the second node can determine the fourth data transmitted by the first node to the third node and the fourth data transmitted by the first node to the second node by performing channel measurement on the received first reference signal. The interference generated by the signal.
  • the second node may configure an uplink transmission parameter, such as an MCS, for the first node according to the channel measurement result of the first reference signal, and the first node may send the fourth data signal to the second node according to the configured uplink transmission parameter, and pass the second The port transmits a first data signal to the third node. Since the uplink transmission parameter configured by the second node for the first node has taken into account the interference of the first data signal with the fourth data signal, the first node sends the fourth data signal based on the uplink transmission parameter configured by the second node. Sending the first data signal not only improves the spectral efficiency, but also reduces the block error rate of the uplink data transmission.
  • an uplink transmission parameter such as an MCS
  • the first reference signal may be the sounding reference signal SRS.
  • the second node may determine interference of the first data signal with the fourth data signal based on channel measurements for the SRS.
  • the second node may take different processing methods based on different channel measurements of the first reference signal by the second node.
  • the second node may determine an uplink transmission parameter of the fourth data signal based on the channel measurement result of the first reference signal and notify the first node by scheduling signaling.
  • the first node sends a fourth data signal to the second node according to the scheduling signaling, and sends the first data signal to the third node through the second port.
  • scheduling signaling is generally sent through DCI.
  • the second node may further send a first indication message to the first node to indicate that the first node is in the first space division multiplexing for transmitting the first data signal.
  • the third node is not in communication within the time slot.
  • the first node does not send the first data signal to the third node on the first space division multiplexing time slot, so as to avoid uplink data of the first data signal sent to the first node.
  • the transmission generates a large interference, thereby avoiding the deterioration of the block error rate performance of the uplink backhaul link of the first node.
  • the first indication message can be sent by using the DCI.
  • the second node may further send a third indication message to the first node to indicate that the first node does not communicate with the third node.
  • the interference of the first data signal to the fourth data signal is greater, and the second node directly rejects the possibility of the third node communicating with the first node based on the interference condition, thereby avoiding the first node and
  • the communication of the third node causes a large interference to the uplink backhaul link between the first node and the second node.
  • the third indication message may be sent by DCI, MAC CE or RRC signaling.
  • the transmit power of the first reference signal is the same as the transmit power of the first data signal; or the transmit power of the first reference signal and the transmit power of the first data signal The difference is the specified value.
  • the second node When the second node performs channel measurement on the first reference signal, if the transmit power of the first reference signal is the same as the transmit power of the first data signal, the second node determines, according to the channel measurement result of the first reference signal, the first The interference of the data signal to the fourth data signal is more accurate.
  • the second node may also obtain the difference between the transmit power of the first reference signal and the transmit power of the first data signal. The interference of the first data signal with the fourth data signal is accurately determined.
  • the first configuration message is further used to indicate a correspondence between a first space division multiplexing time slot for transmitting the first data signal and the first reference signal.
  • the channel measurement of the first reference signal by the second node is actually to determine the interference of the first data signal on the fourth data signal in the scenario where the first node simultaneously transmits data to the second node and the third node. Then, the first node and the second node need to agree on the slot position occupied by the first data signal corresponding to the first reference signal: the first node needs to know the time slot corresponding to the first reference signal, so as to determine the first Transmitting parameters such as precoding of the reference signal, so that the transmitting parameter of the first reference signal is consistent with the transmitting parameter of the first data signal; the second node needs to determine the position of the time slot to be measured, that is, the second node needs to determine that the first node can simultaneously
  • the time slot for transmitting data to the second node and the third node is such that the information obtained by performing channel measurement on the first reference signal can be applied to the configuration of the uplink transmission parameter (such as MCS) of the time slot.
  • the time slot in which the first node transmits the first data signal is referred to as a first space division multiplexing time slot.
  • the correspondence between the first space division multiplexing time slot and the first reference signal is required. determine.
  • first spatial multiplexing multiplexed time slot and the first reference signal may be configured by using the first configuration message, and may be configured by using other configuration messages, which is not specifically limited in this embodiment.
  • the allocation of the first space division multiplexing time slot may be that the second node allocates based on the request of the first node. For example, the second node receives a first request message sent by the first node, where the first request message is used to request to allocate the first space division multiplexing time slot; and the second node sends a second configuration message to the first node, where the The second configuration message carries indication information of the first space division multiplexing time slot.
  • the third node and other nodes may communicate with the first node in a multiplexing manner such as frequency division multiplexing, space division multiplexing, time division multiplexing, or code division multiplexing.
  • the first reference signal received by the second node may be used to measure the interference of the first data signal sent by the first node to the third node to the fourth data signal, and may also be used to measure the first node to other nodes ( For example, the fourth node transmits a second data signal to interfere with the first data signal sent by the first node to the second node.
  • the first data signal and the second data signal are frequency division or space division. Transfer in the same way.
  • the first reference signal is frequency selective precoding.
  • the first configuration message may be configured to allocate resources of other reference signals in addition to resources for configuring the first reference signal.
  • the first configuration message carries resource information for transmitting a second reference signal
  • the method further includes: the second node receiving the first node according to the first configuration message
  • the second reference signal sent by the third port, the third port and the fourth port are the same port or have an antenna port quasi-co-location QCL relationship, and the fourth port is the fifth node to the fifth node.
  • the node transmits a port of the third data signal; the second node performs channel measurement on the second reference signal.
  • the resource information of the second reference signal may be configured by using the first configuration message, or may be configured by using other configuration messages, which is not specifically limited in this embodiment.
  • the foregoing solution may also be extended to a scenario of more reference signals, that is, the reference signal resources configured by the first node based on the first configuration message may send multiple reference signals, and the second node may be based on channel measurement results of multiple reference signals.
  • the interference of the data transmitted between the plurality of nodes and the first node to the data transmitted by the first node to the second node is determined separately.
  • the first configuration message may be further used to indicate a correspondence between a second space division multiplexing time slot for transmitting the third data signal and the second reference signal, so that the first node and the second node A coincidence is made on the position of the time slot occupied by the third data signal corresponding to the second reference signal.
  • the second space division multiplexing time slot may also be configured by the second node based on the request of the first node. For example, the second node receives a second request message sent by the first node, where the second request message is used to request to allocate a second space division multiplexing time slot; the second node is to the first node And sending, by the third configuration message, the third configuration message carries indication information of the second space division multiplexing time slot.
  • the second request message and the first request message may be the same message, or may be different messages.
  • the second node may adopt different processing manners.
  • the second node may determine an uplink transmission parameter of the fifth data signal based on the channel measurement result of the second reference signal and notify the first node by scheduling signaling.
  • the first node sends a fifth data signal to the second node according to the scheduling signaling, and sends the third data signal to the fifth node through the second port.
  • scheduling signaling is generally sent through DCI.
  • the second node may further send a second indication message to the first node to indicate that the first node is in the second space division multiplexing for transmitting the third data signal.
  • the fifth node is not in communication within the time slot.
  • the second indication message can be sent by using the DCI.
  • the second node may further send a fourth indication message to the first node to indicate that the first node does not communicate with the fifth node.
  • the fourth indication message may be sent by DCI, MAC CE or RRC signaling.
  • an embodiment of the present application provides a reference signal transmission apparatus, where the apparatus includes:
  • the receiving module is configured to receive a first configuration message sent by the second node, where the first configuration message carries resource information for transmitting the first reference signal.
  • a sending module configured to send the first reference signal by using the first port according to the first configuration message.
  • the sending module is further configured to send the first data signal to the third node by using the second port.
  • the first port and the second port are the same port or have an antenna port quasi-co-location QCL relationship, the device is a relay node, and the second node is an upper node of the device.
  • the first reference signal is a sounding reference signal SRS.
  • the transmit power of the first reference signal is the same as the transmit power of the first data signal; or the transmit power of the first reference signal and the transmit power of the first data signal The difference is the specified value.
  • the first configuration message is further used to indicate a correspondence between a first space division multiplexing time slot for transmitting the first data signal and the first reference signal.
  • the first configuration message carries resource information for transmitting a second reference signal
  • the sending module is further configured to: send, according to the first configuration message, by using a third port a second reference signal; sending a third data signal to the fifth node through the fourth port, where the third port and the fourth port are the same port or have an antenna port QCL relationship.
  • the first configuration message is further used to indicate a correspondence between a second space division multiplexing time slot for transmitting the third data signal and the second reference signal.
  • an embodiment of the present application provides a reference signal transmission apparatus, where the apparatus includes:
  • a sending module configured to send, to the first node, a first configuration message, where the first configuration message carries resource information for transmitting the first reference signal.
  • a receiving module configured to receive, by the first node, the first reference signal sent by using the first port according to the first configuration message, where the first port and the second port are the same port or have an antenna port In the address QCL relationship, the second port is a port for the first node to send a first data signal to a third node, the first node is a relay node, and the device is a superior node of the first node.
  • a processing module configured to perform channel measurement on the first reference signal.
  • the first reference signal is a sounding reference signal SRS.
  • the first configuration message is further used to indicate a correspondence between a first space division multiplexing time slot for transmitting the first data signal and the first reference signal.
  • the first configuration message carries resource information for transmitting a second reference signal
  • the receiving module is further configured to: receive, by the first node, according to the first configuration message,
  • the second reference signal sent by the three ports, the third port and the fourth port are the same port or have an antenna port quasi-co-location QCL relationship, and the fourth port is sent by the first node to the fifth node.
  • the port of the three data signals; the processing module is further configured to: perform channel measurement on the second reference signal.
  • an embodiment of the present application provides a reference signal transmission apparatus, including: a transceiver, a memory, and a processor, where the memory is used to store program code that is required to be executed by the processor.
  • the transceiver is used for data transceiving between the device and other devices, such as the first node or the second node.
  • the processor is configured to execute the program code stored in the memory, and is specifically for performing the method described in any one of the first aspect to the second aspect.
  • the embodiment of the present application further provides a computer readable storage medium, configured to store a computer used to perform the function designed by any one of the foregoing aspects to any one of the first aspect to the second aspect
  • a software instruction comprising a program designed to perform any of the designs of any one or both of the first to second aspects above.
  • the embodiment of the present application provides a computer program product comprising instructions, when executed on a computer, causing a computer to perform the above first aspect or any one or both of the first aspect to the second aspect Any of the aspects of the method described.
  • an embodiment of the present application provides a chip, where the chip is connected to a memory, and is used for reading and executing a software program stored in the memory, so as to implement the foregoing aspects to the second aspect.
  • the embodiment of the present application provides a chip, where the chip includes a processor and a memory, and the processor is configured to read a software program stored in the memory to implement the foregoing first to second A method provided by any one of the aspects or any one of the aspects.
  • FIG. 1 is a schematic structural diagram of a communication system provided by the prior art
  • FIG. 2 is a schematic structural diagram of a first communication system according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a second communication system according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a third communication system according to an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a method for transmitting a reference signal according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a time slot distribution of a first node according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of resource distribution of a first type of first node according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of resource distribution of a second type of first node according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of another time slot distribution of a first node according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of resource distribution of a third first node according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a first reference signal transmission apparatus according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a second reference signal transmission apparatus according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a third reference signal transmission apparatus according to an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a fourth reference signal transmission apparatus according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of a fourth communication system according to an embodiment of the present application.
  • the network architecture and the service scenario described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation of the technical solutions provided by the embodiments of the present application. It can be seen that, with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.
  • Embodiments of the present application can be applied to a communication system including a relay node.
  • the communication system includes, but is not limited to, a long term evolution (LTE) system, a long term evolution-advanced (LTE-A) system, and an extended term evolution-advanced pro (LTE-).
  • LTE long term evolution
  • LTE-A long term evolution-advanced
  • LTE- extended term evolution-advanced pro
  • A-pro new radio
  • new radio new radio
  • 5G network architecture 5 th generation system
  • other communication systems can be extended to as wireless fidelity (wireless fidelity, WiFi), worldwide Interoperability for microwave access (worldwide Interoperability for microwave access, wimax), and standard-related cellular systems such as the 3rd generation partnership project (3gpp).
  • a communication system including a relay node can be as shown in FIG. 2.
  • the base station can provide services for the relay node RN1 and the relay node RN2.
  • the user equipment UE0 can directly establish a communication connection with the base station, and the user equipment UE1 can establish a communication connection with the base station through the RN1, and the user equipment UE2 can establish a communication connection with the RN1 through the RN2, thereby establishing a communication connection with the base station.
  • UE2 can also establish a connection with the base station through RN2.
  • the base station may be an ordinary base station (such as a Node B or an eNB), a new radio controller (NR controller), a gNode B (gNB) in a 5G system, a centralized network unit, a new wireless unit.
  • a UE is a device that provides voice and/or data connectivity to a user, for example, a handheld device with wireless connectivity, an in-vehicle device, and the like.
  • Common terminals include, for example, mobile phones, tablets, notebook computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, smart bracelets, pedometers, and the like.
  • MIDs mobile internet devices
  • wearable devices such as smart watches, smart bracelets, pedometers, and the like.
  • a relay node is a network device that provides data connection services for user equipment or next-level relay nodes through a wireless access link. Different from the general network device, the relay node is connected to the host node through a backhaul link, wherein the host node may be a base station or a higher-level relay node.
  • the relay node can be an RN in an LTE network.
  • the relay node may be named rTRP (relay TRP), IAB node, and so on.
  • the user equipment can also act as a relay node.
  • the relay mode in which the access link and the backhaul link share the frequency band may be referred to as an inband relay, and the relay node operating according to the relay mode may be referred to as an inband relay node.
  • the embodiment of the present application is applied to a communication system including a relay node, where the communication system includes at least three nodes: a first node, a second node, and a third node, as shown in FIG.
  • the first node is a relay node
  • the second node is a superior node of the first node.
  • the third node may be a lower node of the first node or another upper node of the first node.
  • the upper node refers to a node that can provide services for the lower node and can control the lower node (for example, data scheduling, beam management, power control, etc.).
  • the upper node is closer to the core network or the control center than the lower node, that is, in the downlink transmission process from the base station to the UE, the data generally passes through the upper node and then passes through the lower node of the node.
  • the superior node may also be referred to as an upstream node
  • the lower node may also be referred to as a downstream node.
  • the downlink data transmission path of the base station may be the base station ⁇ RN1 ⁇ RN2 ⁇ UE2, the base station is the upper node of the RN1, the RN1 is the upper node of the RN2, and the RN2 is the upper level of the UE2.
  • the downlink data transmission path of the base station may be the base station ⁇ RN2 ⁇ UE2, the base station is the upper node of the RN2, the RN2 is the upper node of the UE2, and the RN2 is the lower node of the base station.
  • UE2 is a lower node of RN2.
  • the downlink data transmission path of the base station may be the base station ⁇ RN1 ⁇ UE1, the base station is the upper node of the RN1, the RN1 is the upper node of the UE1, and the RN1 is the lower node of the base station.
  • UE1 is a lower node of RN1.
  • the second node may be the base station in FIG. 2, and the third node may be RN2 or UE1 in FIG. 2;
  • the second node may be the base station or RN1 in FIG. 2
  • the third node may be the UE2 in FIG.
  • the third node may be a lower node of the first node, or may be another upper node of the first node.
  • the third node may be RN2 or UE1 in FIG. 2, or may be another upper node of RN1 not shown in FIG. 2;
  • the third node may be UE2 in FIG. 2, or may be another upper node of RN2 not shown in FIG. 2.
  • the first node may use the same spectrum resource when transmitting data to the second node and the third node, and the first node may transmit data to the third node simultaneously.
  • the second node transmits data, for example, the first node simultaneously transmits data to the second node and the third node by means of SDMA.
  • the scheme that the first node transmits data to the second node and the third node at the same time does not use additional spectrum resources, and thus has the advantages of high spectrum efficiency and low deployment cost.
  • the data signal transmitted by the first node to the third node ie, the data signal transmitted on the link indicated by the light gray arrow of the first node in FIG. 3 to the third node
  • the data signal transmitted by the first node to the second node ie, the data signal transmitted on the link indicated by the dark arrow of the first node in FIG. 3 (as shown by the dotted arrow in FIG. 3) Shown). Since the second node has difficulty in knowing the specific scheduling information of the data signal transmitted by the first node to the third node, it is difficult for the second node to predict the channel information of the interference.
  • the second node needs to configure the uplink transmission parameter according to the interference condition of the uplink data transmission (the uplink backhaul link between the first node and the second node), so that it is inevitable that the second node has difficulty obtaining the channel information of the interference accurately. It affects the accuracy of the second node configuration uplink transmission parameters, resulting in performance degradation such as block error rate.
  • the uplink transmission parameters include, but are not limited to, a modulation and coding scheme (MCS), a transmission power, a number of transmission streams, and a precoding matrix.
  • MCS modulation and coding scheme
  • the second node determines the data signal transmitted by the first node to the third node and the data signal transmitted by the first node to the second node.
  • the interference condition which makes it difficult for the second node to accurately configure the uplink transmission parameters such as the MCS, the number of transmission streams, and the precoding matrix for the uplink backhaul link.
  • the second node needs to estimate channel state information parameters such as a signal to interference plus noise ratio (SINR) of the transmission process before scheduling the first node to perform uplink transmission, to determine an appropriate uplink transmission parameter, such as Transport stream number, precoding matrix, MCS, etc.
  • SINR signal to interference plus noise ratio
  • MCS transport stream number
  • MCS precoding matrix
  • the measurement in the channel state information parameter estimation can be divided into two parts: expected channel measurement and interference plus noise measurement. Among them, the measurement of interference plus noise is more complicated.
  • the desired channel may be a channel from the first node to the second node.
  • the uplink transmission between the UE1 and the second node may be regarded as interference, which is called intra-cell interference; in addition, the uplink transmission of other cell users may also be The uplink transmission between the second node and the first node causes interference, which is called inter-cell interference.
  • the second node configures both of the sounding reference signals (SRS) to be recorded as SRS0 and SRS1 before scheduling the first node and the UE1.
  • SRS sounding reference signals
  • the second node may measure the uplink channel through SRS0, and measure the interference of the UE1 uplink transmission to the uplink transmission of the first node by using SRS1. Due to dynamic scheduling, it is difficult for the second node to predict the specific situation of inter-cell interference, and only the average power of the interference can be measured. In actual implementation, the second node may measure the average power of the inter-cell interference at the transmission moment of the physical uplink share channel (PUSCH).
  • PUSCH physical uplink share channel
  • the interference measurement mechanism when the second node configures the uplink transmission parameters such as the MCS for the first node, only the channel measurement, the intra-cell interference measurement, and the inter-cell interference measurement are considered, and the first node is not considered.
  • the data transmission between the first node and the third node interferes with the data transmission of the uplink backhaul link (between the first node and the second node), thus
  • the existing interference measurement mechanism may cause the second node to configure the uplink parameter of the first node with low accuracy and the error rate performance of the block.
  • the embodiment of the present application provides a method and a device for transmitting a reference signal, so that the first node transmits a reference signal to the second node, so that the second node can determine the first node by using the channel measurement of the reference signal.
  • the second node may determine, according to the channel measurement of the first reference signal, a data signal that is transmitted by the first node to the third node, and the data signal that is transmitted by the first node to the second node.
  • the interference is used to determine the interference of the link between the first node and the third node to the link between the first node and the second node.
  • the second node is a superior node of the first node, and thus the link of the first node to the second node may be referred to as a backhaul link.
  • the link between the first node and the third node may be a backhaul link or an access chain. road.
  • the solution provided by the embodiment of the present application may determine the backhaul link between the first node and the third node to the back link between the first node and the second node.
  • the solution provided by the embodiment of the present application may determine the return link between the access node of the first node and the third node to the first node and the second node. Interference.
  • FIG. 5 is a schematic flowchart diagram of a reference signal transmission method according to an embodiment of the present application. The method includes the following steps.
  • S501 The first node receives the first configuration message sent by the second node.
  • the first configuration message carries resource information for transmitting the first reference signal.
  • the first node is a relay node, and the second node is a superior node of the first node.
  • the first node may be a base station or an upper relay node of the second node.
  • the first reference signal may be an SRS, or may be a reference signal such as a channel state information reference signal (CSI-RS).
  • CSI-RS channel state information reference signal
  • the SRS is mainly taken as an example, but the possibility that the first reference signal is another type of reference signal is not excluded.
  • the resource information for transmitting the first reference signal may also be referred to as configuration information of the first reference signal resource.
  • the configuration information of the first reference signal resource may include at least one of: an ID of the first reference signal resource; a number of ports of the first reference signal resource; a type of the first reference signal resource, such as periodicity, and a half Persistence, aperiodicity; time slot configuration of the first reference signal resource, such as slot level period and offset configuration; time domain resource information of the first reference signal resource, such as initial orthogonal frequency division multiplexing (orthogonal) Frequency division multiplexing (OFDM) symbol, number of repeated symbols, etc.; bandwidth information of the first reference signal resource; frequency hopping information of the first reference signal resource; frequency domain mapping position of the first reference signal resource, eg, frequency domain start and stop position, frequency Domain combo position, etc.; sequence information of the first reference signal resource; spatial relationship information of the first reference signal, the spatial relationship information can be used to indicate spatial quasi-co-location of the first reference signal and other
  • the second node may also indicate the use of the first reference signal in the first configuration information, such as beam management, antenna switching, codebook uplink transmission, non-codebook uplink transmission, and the like.
  • the first node selects an appropriate transmission mode according to the purpose of the first reference signal, for example, selecting an appropriate SRS precoding matrix, that is, selecting a port for transmitting the first reference signal.
  • the first reference signal in the embodiment of the present application is a reference signal used by the second node to perform interference measurement, and thus two types of information in the resource information of the first reference signal require special attention, that is, the first reference signal.
  • the second node may configure the use of the first reference signal as "interference measurement" in the first configuration message, such that the first node may select the appropriate port for transmitting the first reference signal in the manner described herein Transmitting the first reference signal; meanwhile, since the transmission parameter of the first reference signal is determined by the first node, the spatial relationship of the first reference signal in the first configuration message may be defaulted.
  • the resource information of the foregoing first reference signal is generally configured by RRC signaling.
  • RRC signaling the possibility that some of the parameters can be modified by other signaling is not excluded in the embodiment of the present application, for example, the media access control layer control element (media) Access control layer control elment, MAC CE) modify some of the parameters.
  • media media access control layer control element
  • MAC CE media Access control layer control elment
  • the first node may directly send the first reference signal according to the first configuration information; when the first reference signal is a semi-persistent signal, the first node needs to be activated or deactivated by using the MAC CE. The first reference signal is sent; and when the first reference signal is a non-periodic signal, the first node needs to trigger the transmission of the first reference signal by using downlink control information (DCI) signaling.
  • DCI downlink control information
  • S502 The first node sends the first reference signal by using the first port according to the first configuration message.
  • the first reference signal sent by the first node to the second node is used for interference measurement. Then, after receiving the first reference signal sent by the first node in S502, the second node may perform channel measurement on the first reference signal, so as to determine the subsequent first node according to the channel measurement result of the first reference signal.
  • the third node may be a lower node of the first node or another upper node of the first node.
  • the embodiment of the present application only limits that the first node can simultaneously transmit data to the second node and the third node (for example, the first node uses the SDMA method to simultaneously transmit data to the second node and the third node), and does not specifically limited.
  • the third node is the upper node of the first node or the lower node of the first node, as long as the first node can simultaneously transmit data to the second node and the third node, the data transmitted by the first node to the third node
  • the signal may interfere with the data signal transmitted by the first node to the second node, and the second node may determine the channel information of the interference based on the channel measurement result of the first reference signal.
  • the action of the first node transmitting the first reference signal occurs before the first node simultaneously transmits data to the second node and the third node. That is, before the first node simultaneously performs data transmission to the second node and the third node, the second node may first determine, according to the channel measurement result of the first reference signal, the data signal transmitted by the subsequent first node to the third node. Interference caused by the data signal transmitted by the first node to the second node. Therefore, when the second node configures an uplink transmission parameter such as an MCS for the first node, the interference can be taken into consideration, so that the configured uplink transmission parameter is more accurate. Then, when the first node transmits data to the second node, the data can be transmitted based on the more accurate uplink transmission parameter, thereby improving the frequency utilization rate and reducing the error block rate of the uplink backhaul link.
  • the second node may first determine, according to the channel measurement result of the first reference signal, the data signal transmitted by the subsequent first node to the third node. Interference
  • the first node when the first node sends the first reference signal, it is sent by using the first port.
  • the first port is determined in the following manner: assuming that the subsequent first node simultaneously transmits the data signal to the second node and the third node to the third node through the second port, the first port may be the same as the second port. It is also possible to satisfy the antenna port QCL relationship with the second port.
  • the two ports are the same, that is, the two ports adopt the same analog and digital precoding, and in the case of denying the channel, the channels corresponding to the same port are the same.
  • the fact that two antenna ports have a QCL relationship means that the channel large-scale characteristic of one of the antenna port transmission symbols can be derived from the channel from which the other antenna port transmits the symbol. That is, the corresponding channels of the two antenna ports have the same or similar channel large-scale characteristics.
  • the large-scale characteristics of the channel include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial receive parameters.
  • the NR protocol defines multiple QCL relationships, such as QCL relationships based on spatial parameters, ie QCL-Type D: ⁇ Spatial Rx parameter ⁇ . In general, two-port transmit signals with spatial QCL relationships have the same or similar transmit beams. direction.
  • the first port and the second port have a QCL relationship, and the specific meaning may be: a beam direction when the first reference signal is sent and a beam direction when the first node sends a data signal to the third node. Same or similar.
  • the above description of the first port and the second port is not difficult to understand.
  • the spatial relationship of the first reference signal mentioned above may be defaulted because the first node needs to determine the transmission of the first reference signal according to its own scheduling situation.
  • the parameters eg, the transmit beam direction
  • the parameters are determined not according to the first configuration message, so the spatial relationship of the first reference signal may be defaulted.
  • the first node sends the first reference signal through the first port, so that the first node can transmit data to the third node through the second port.
  • the second node can determine the interference generated by the data signal transmitted by the first node to the third node to the data signal transmitted by the first node to the second node by performing channel measurement on the received first reference signal.
  • S503 The second node performs channel measurement on the first reference signal.
  • the second node performs channel measurement on the first reference signal, and can determine that the data signal transmitted by the first node to the third node (hereinafter referred to as the first data signal) is transmitted to the first node to the second node.
  • the interference caused by the data signal (hereinafter referred to as the fourth data signal).
  • the second node may also determine interference of the first data signal with other signals by using channel measurement of the first reference signal.
  • the second node performs channel measurement on the first reference signal
  • the second node determines according to the channel measurement result of the first reference signal.
  • the interference of the first data signal to the fourth data signal is more accurate.
  • the second node may also obtain the difference between the transmit power of the first reference signal and the transmit power of the first data signal. The interference of the first data signal with the fourth data signal is accurately determined.
  • the transmit power of the first reference signal may be the same as the transmit power of the first data signal; or the difference between the transmit power of the first reference signal and the transmit power of the first data signal may be a specified value.
  • the transmit power of the first reference signal and the transmit power of the first data signal may be configured in the following three manners:
  • the second node may indicate, by using the first configuration message, that the transmit power of the first reference signal is the same as the transmit power of the first data signal, or indicate, by using the first configuration message, the transmit power of the first reference signal and the transmit power of the first data signal.
  • the difference is the specified value.
  • the transmission power of the first reference signal may be the same as the transmission power of the first data signal, or the difference between the transmission power of the first reference signal and the transmission power of the first data signal may be agreed by a protocol. Specify a value.
  • the first node may report to the second node that the transmit power of the first reference signal is the same as the transmit power of the first data signal, or the first node may compare the transmit power of the first reference signal with the transmit power of the first data signal ( That is, the specified value is reported to the second node.
  • the channel measurement of the first reference signal is actually to determine the interference of the subsequent first data signal to the fourth data signal.
  • the first node and the second node need to agree on the slot position occupied by the first data signal corresponding to the first reference signal: the first node needs to know the time slot corresponding to the first reference signal, so as to determine the first Transmitting parameters such as precoding of the reference signal, so that the transmitting parameter of the first reference signal is consistent with the transmitting parameter of the first data signal; the second node needs to determine the position of the time slot to be measured, that is, the second node needs to determine that the first node can simultaneously
  • the time slot for data transmission to the second node and the third node is such that the information measured by the first reference signal channel is applied to the configuration of the uplink transmission parameter (such as MCS) of the time slot.
  • the time slot in which the first node transmits the first data signal is referred to as a first space division multiplexing time slot.
  • the correspondence between the first space division multiplexing time slot and the first reference signal is required. determine.
  • the corresponding relationship may be understood as follows: the first reference signal is used to measure the interference caused by the first data signal on the uplink backhaul link, and then the first reference signal has a corresponding relationship with the first data signal; The first data signal is sent after the first reference signal is sent, and the time slot (or the time slot position) for transmitting the first data signal also has a corresponding relationship with the first data signal, and the time slot is called the first space division multiplexing. Time slot. Therefore, the first space division multiplexing time slot and the first reference signal also have a corresponding relationship. Only when the corresponding relationship is determined, it can be known which time slot (or time slot position) the measurement result obtained according to the first reference signal is applicable to. ).
  • the first node determines that slot0 is used to send the first reference signal according to the indication of the first configuration message. Moreover, the first node may determine, according to the first configuration message or other configuration message, that the time slot corresponding to the first reference signal is slot 3. Then, when the first node sends the first reference signal, the port that is the same as the port that transmits data to the third node on slot 3 or has a QCL relationship may be selected, or the first node may correspond to the slot 3 according to the first reference signal. The relationship, jointly determining a precoding matrix of the first reference signal and the first data signal.
  • the time slot corresponding to the first reference signal (ie, the first space division multiplexing time slot) may be indicated in the first configuration message, or may be displayed or implicitly indicated by other configuration messages.
  • the correspondence between the first space division multiplexing time slot and the first reference signal may also adopt a manner specified by the protocol.
  • the protocol may specify that the first space division multiplexing time slot always corresponds to the Nth time slot after the time slot in which the first reference signal is transmitted, and N is a positive integer greater than or equal to 1. Where N may be a configurable value.
  • the first node may request the second node to allocate a space division multiplexing time slot, that is, request a time slot in which the first node can simultaneously transmit data to the second node and the third node. Then, the second node configures the first space division multiplexing time slot for the first node, and can simultaneously configure the first reference signal for interference measurement for the first space division multiplexing time slot. In this implementation manner, the first reference signal is configured simultaneously with the first space division multiplexing time slot, and the corresponding relationship between the two can be directly obtained.
  • the first space division multiplexing time slot is a time slot in which the first node can simultaneously transmit data to the second node and the third node. That is to say, in the embodiment of the present application, the time slot used by the first node to transmit the fourth data signal to the second node may be multiplexed to the third node.
  • the first node may send a first data signal to the third node on the time slot, where the time slot is the first space division multiplexing time slot.
  • the second node may also separately configure the first reference signal and the first space division multiplexing time slot, and then indicate the correspondence between the first reference signal and the first space division multiplexing time slot by using a manner specified by the foregoing signaling indication or protocol. relationship.
  • the number of the space division multiplexing time slots that the first node requests to allocate is not limited, and the number may be one or multiple.
  • the first node determines that the second node performs data transmission, the first node can perform data transmission with the third node at the same time.
  • the first node determines that the second node performs data transmission, it can also simultaneously communicate with another node ( For example, the fifth node performs data transmission, then the first node may request the second node to allocate two space division multiplexing slots.
  • the first node when the first node requests to allocate the space division multiplexing time slot, the first node may also report the location of the space division multiplexing time slot requested for allocation. For example, in FIG. 6, the first node may request to allocate slot 3 and slot 4 as space division multiplexing slots, and after receiving the request, the second node may configure slot 3 and slot 4 as space division multiplexing slots, and It can be configured with a corresponding reference signal.
  • the first Based on the channel measurement result of the second node to the first reference signal in S503, combined with the measurement of the uplink channel between the first node and the second node, the intra-cell interference measurement, and the inter-cell interference measurement, the first can be more accurately estimated.
  • the channel state information parameter such as the SINR of the uplink data transmission of the node, so that the uplink transmission parameter configured for the first node is more accurate.
  • the result of the first reference signal may show the uplink of the data pair (between the first node and the second node) transmitted between the first node and the third node.
  • the data transmitted by the backhaul link has less interference, and may also show that the interference is large.
  • the second node can adopt different processing methods. Three of the processing methods are listed below.
  • step S503 After the foregoing step S503 is performed, the following step S504 is performed.
  • S504 The first node sends the first data signal to the third node by using the second port.
  • the first port and the second port are the same port or have an antenna port quasi-co-location QCL relationship.
  • the second node may determine an uplink transmission parameter of the fourth data signal based on the channel measurement result of the first reference signal and notify the first node by scheduling signaling.
  • the first node sends a fourth data signal to the second node according to the scheduling signaling, and performs S504 to send the first data signal to the third node by using the second port.
  • scheduling signaling is generally sent through DCI.
  • the resource distribution diagram of the first node may be as shown in FIG. 7: the first node is sent according to the SRS resource configured by the second node.
  • the interference measurement SRS an example of the first reference signal
  • the second node determines, according to the channel measurement of the interference measurement SRS, the first data signal transmitted in the Physical Downlink Share Channel (PDSCH) to be transmitted in the PUSCH Four data signal interference.
  • PDSCH Physical Downlink Share Channel
  • the same analog and digital precoding are used when transmitting the interference measurement SRS and transmitting the first data signal, and the first data signal and the fourth data signal are transmitted by using space division multiplexing, that is, the first data signal and the fourth data signal. Simultaneous transmission.
  • the interference measurement SRS is a specific example of the first reference signal.
  • the “interference measurement” indicates that the SRS is used to measure the interference of the link from the first node to the third node and the link from the first node to the second node.
  • the second node may determine the interference of the link from the first node to the third node to the link of the first node to the second node by measuring the channel of the interference measurement SRS.
  • the second node configures an uplink transmission parameter such as MCS for the uplink data transmission of the first node based on the channel measurement result of the first reference signal, and the first node may send the fourth node to the second node according to the configured uplink transmission parameter.
  • the data signal transmits the first data signal to the third node through the second port. Because the uplink transmission parameter configured by the second node for the first node has taken into account the interference of the first data signal with the fourth data signal, the first node sends the first data signal based on the configured uplink transmission parameter and sends the first data signal.
  • the data signal not only improves the spectral efficiency, but also reduces the block error rate of the uplink data transmission.
  • the first processing manner can be applied to the following scenario: the second node has the capability of suspending the first node to send the first data signal to the third node, and the second node is performing channel measurement on the first reference signal. After determining that the first node simultaneously transmits the first data signal and the fourth data signal, the interference of the first data signal to the fourth data signal is within an acceptable range, and the second node configures the uplink for the first node according to the interference. Transmitting the parameter, the first node may send the first data signal to the third node on the first space division multiplexing time slot, and send the fourth data signal to the second node according to the configured uplink transmission parameter.
  • the first processing manner may also be applied to the scenario that the second node does not have the ability to suspend the first node to send the first data signal to the third node; then, regardless of the channel measurement result of the second node to the first reference signal How to: the second node configures an uplink transmission parameter for the first node based on the interference of the first data signal to the fourth data signal, and the first node sends the fourth data signal according to the configured uplink transmission parameter, and simultaneously sends the fourth data signal to the third node. Send the first data signal.
  • the first node receives the first indication message sent by the second node.
  • the first indication message is used to indicate that the first node does not communicate with the third node in the first space division multiplexing time slot for transmitting the first data signal.
  • the first indication message may be sent by using the DCI, for example, may be carried in the scheduling signaling of the fourth data signal by the second node.
  • a bit may be configured in the scheduling signaling to indicate whether the first node is allowed to transmit the first data signal on the first space division multiplexing time slot. It should be noted that when the scheduling signaling carries the indication information, the scheduling information needs to be sent in advance, that is, before the first space division multiplexing slot.
  • the second node determines, according to the channel measurement result of the first reference signal, the first transmission to the third node if the first node subsequently transmits the data signal to the second node and the third node at the same time.
  • the interference of the data signal to the fourth data signal transmitted by the second node is large, and the second node may indicate, by using the first indication message, that the first node does not communicate with the third node in the first space division multiplexing time slot.
  • the first node is prevented from transmitting the first data signal to the third node, so as to prevent the first data signal that is sent from causing a large interference to the uplink data transmission of the first node, thereby avoiding the deterioration of the error block of the uplink backhaul link of the first node. Rate performance.
  • the second processing manner can be applied to the following scenario: the second node has the capability of suspending the first node to send the first data signal to the third node, and the second node is performing channel measurement on the first reference signal. After determining that the first node simultaneously transmits the first data signal and the fourth data signal, the interference of the first data signal to the fourth data signal is out of the receivable range, and the second node indicates the first node by using the first indication message. Do not send the first data signal to the third node on the first space division multiplexing time slot.
  • the first node receives the third indication message sent by the second node.
  • the third indication message is used to indicate that the first node does not communicate with the third node.
  • the second node determines, according to the channel measurement result of the first reference signal, the first transmission to the third node if the first node subsequently transmits the data signal to the second node and the third node at the same time.
  • the interference of the data signal to the fourth data signal transmitted to the second node is particularly large, and the second node may indicate, by the third indication message, that the first node does not communicate with the third node.
  • the difference between the third processing mode and the second processing mode is: in the third processing mode, if the first node subsequently transmits data signals to the second node and the third node at the same time, the first data signal is applied to the fourth data signal.
  • the interference is greater, and the second node directly rejects the possibility of the third node communicating with the first node based on the interference situation, instead of limiting only the first node in the first space division multiplexing as in the second processing mode.
  • the third node does not communicate with the third node, thereby preventing the communication between the first node and the third node from causing a large interference to the uplink backhaul link between the first node and the second node.
  • the first indication message is generally sent by using the DCI; and for the third processing mode, the third indication message may be transmitted through the DCI, and may also be controlled by the MAC CE or the radio resource (radio resource). Control, RRC) signaling.
  • RRC radio resource
  • the first node may terminate communication between the first node and the third node after receiving the third indication message according to the indication of the third indication message.
  • the third indication message sent by the second node may indicate that the first node does not communicate with the third node after sending the first data signal to the third node.
  • the third processing manner can be applied to the following scenario: the second node has the capability of suspending the first node to send the first data signal to the third node, and the second node is performing channel measurement on the first reference signal. Then, it is determined that if the communication between the first node and the third node has a particularly large interference to the uplink transmission of the first node, the second node indicates, by the third indication message, that the first node does not communicate with the third node.
  • the third node and other nodes may perform multiplexing with the first node by using frequency division multiplexing, space division multiplexing, time division multiplexing, or code division multiplexing. Communication.
  • the first reference signal sent by the first node to the second node is used to measure the interference of the first data signal sent by the first node to the third node to the fourth data signal, and may also be used to measure the first The interference of the data signal sent by the node to other nodes (eg, the fourth node) to the data signal sent by the first node to the second node.
  • the fourth node may be a lower node of the first node, or may be another upper node of the first node except the second node and the third node.
  • the first node can go through the second port.
  • the four nodes send the second data signal, wherein the first data signal and the second data signal are transmitted by frequency division or space division multiplexing.
  • the resource distribution diagram of the first node may be as shown in FIG. 8: the first node is based on the second node.
  • the configured SRS resource sends an interference measurement SRS (an example of the first reference signal), wherein the downlink data transmission of the first node adopts a frequency division multiplexing manner, that is, the first data signal and the second data signal adopt a frequency division multiplexing manner.
  • the transmission is performed; in the same sub-band, the first node transmits the interference measurement SRS and transmits the downlink data signal (the first data signal or the second data signal) using the same analog and digital precoding.
  • the first data signal is transmitted on one sub-band of the PDSCH and the second data signal is transmitted on another sub-band of the PDSCH.
  • the first data signal and the second data signal are transmitted in a frequency division multiplexing manner.
  • the same analog and digital pre-coding is used when transmitting the interference measurement SRS and transmitting the first data signal; the interference measurement SRS and the transmission second are transmitted on the sub-band transmitting the second data signal.
  • the same analog and digital precoding is used for the data signal. Therefore, the interference measurement SRS requires frequency selective precoding.
  • the second node may selectively perform channel measurement on the first reference signal on the partial frequency band, and the measurement result may be used to determine the first node to the first node.
  • the first node may selectively send the second data signal to the fourth node through the second port, or selectively to the third port through the second port.
  • the node sends the first data signal.
  • the first configuration message may be configured to allocate resources of other reference signals in addition to resources for configuring the first reference signal. That is, the reference signal resource configured by the first node based on the first configuration message may send multiple reference signals, and the second node may separately determine the transmission between the multiple nodes and the first node based on channel measurement results of the multiple reference signals. The interference of data with data transmitted by the first node to the second node.
  • the first configuration message carries resource information for transmitting the second reference signal; then, the first node may further send the second reference signal by using the third port according to the first configuration message;
  • the four ports send a third data signal to the fifth node, and the third port and the fourth port are the same port or have an antenna port QCL relationship.
  • the fifth node may be a lower node of the first node, or may be another upper node of the first node (other than the second node, the third node, and the fourth node).
  • the fifth node may also be the same node as the third node, or the fifth node may be the same node as the third node, which is not specifically limited in this embodiment of the present application.
  • the resource information for transmitting the second reference signal may be configured by using the first configuration message, or may be configured by using other configuration messages, which is not specifically limited in this embodiment of the present application.
  • the third port and the fourth port are the same port or satisfy the QCL relationship of the antenna port, and the specific meaning thereof may be: the beam direction and the sending direction when the second reference signal is sent.
  • the beam directions of the three data signals are the same or similar, that is, the same analog and digital precoding is used to transmit the second reference signal and the third data signal.
  • the second node may perform channel measurement on the second reference signal, thereby determining that the first data node transmits data to the second node and the fifth node at the same time, and the third data signal is paired with the first data signal.
  • the interference generated by the data signal transmitted by the node to the second node (hereinafter referred to as the fifth data signal).
  • the fifth data signal and the fourth data signal may be the same data signal or different data signals.
  • two reference signal resources may be configured, or two measurement ports may be configured on one reference signal resource. (ie, the first port and the second port), such that the second node can separately measure the interference of the data signal transmitted on the two links with the data signal transmitted by the first node to the second node.
  • resource information of multiple reference signals may be configured by using the first configuration message, so that the second node may determine, by using channel measurement results of multiple reference signals, multiple data signal pairs transmitted on multiple links respectively. Interference of a data signal transmitted by a node to a second node.
  • the channel measurement of the second reference signal is actually to determine the interference of the third data signal to the fifth data signal in the scenario where the subsequent first node transmits data to the second node and the fifth node at the same time. Then, the first node and the second node need to agree on the slot position occupied by the third data signal corresponding to the second reference signal: the first node needs to know the time slot corresponding to the second reference signal, so as to determine the second Transmitting parameters such as precoding of the reference signal, so that the transmitting parameter of the second reference signal is consistent with the transmitting parameter of the third data signal; the second node needs to determine the position of the time slot to be measured, that is, the second node needs to determine that the first node can simultaneously The time slot in which data is transmitted to the second node and the fifth node so that the information obtained by performing channel measurement on the second reference signal can be applied to the configuration of the uplink transmission parameter of the time slot.
  • the time slot in which the first node transmits the third data signal is referred to as a second space division multiplexing time slot.
  • the correspondence between the second space division multiplexing time slot and the second reference signal is required. determine.
  • the second space division multiplexing time slot is a time slot in which the first node can simultaneously transmit data to the second node and the fifth node. That is to say, in the embodiment of the present application, the time slot used by the first node to transmit the fifth data signal to the second node may be multiplexed to the fifth node.
  • the first node may send a third data signal to the fifth node on the time slot, where the time slot is the second space division multiplexing time slot.
  • the correspondence between the second space division multiplexing slot and the second reference signal may be understood as follows: the second reference signal is used to measure the interference caused by the third data signal on the uplink backhaul link, then The second reference signal has a corresponding relationship with the third data signal; and the third data signal is sent after the second reference signal is transmitted, and the time slot (or the slot position) for transmitting the third data signal also corresponds to the third data signal. Relationship, this time slot is called a second space division multiplexing time slot. Therefore, the second spatial multiplexing multiplexed time slot and the second reference signal also have a corresponding relationship. Only when the corresponding relationship is determined, it can be known which time slot (or time slot position) the measurement result obtained according to the second reference signal is applicable to. ).
  • mapping between the second spatial multiplexing multiplexed time slot and the second reference signal may be indicated by the first configuration message, or may be displayed by other configuration messages or implicitly indicated.
  • first space division multiplexing time slot and the first reference signal and the correspondence between the second space division multiplexing time slot and the second reference signal may be indicated by the first configuration message, or It is indicated by two configuration messages, which are not specifically limited in this embodiment.
  • five time slots of the first node are considered, which are slot0 to slot4, respectively.
  • the first node determines that slot 0 is used to send the first reference signal according to the indication of the first configuration message, and slot 1 is used to send the second reference signal.
  • the first node may determine, according to the first configuration message or another configuration message, that the time slot corresponding to the first reference signal is slot 3, and the time slot corresponding to the second reference signal is slot 4. Then, when the first node sends the first reference signal, the port that is the same as the port that transmits data to the third node on slot 3 or has a QCL relationship may be selected, or the first node may correspond to the slot 3 according to the first reference signal.
  • the relationship jointly determining a precoding matrix of the first reference signal and the first data signal.
  • the port that is the same as the port that transmits data to the fifth node on slot 4 or has a QCL relationship may be selected, or the first node may according to the correspondence between the second reference signal and slot 4.
  • jointly determining a precoding matrix of the second reference signal and the third data signal may be selected, or the first node may according to the correspondence between the second reference signal and slot 4.
  • the correspondence between the first space division multiplexing slot and the first reference signal and the correspondence between the second space division multiplexing slot and the second reference signal may be performed by using the foregoing signaling (for example, the first configuration message).
  • the method specified in the agreement may also be adopted.
  • the protocol may specify that the first space division multiplexing time slot always corresponds to the Nth time slot after the time slot in which the first reference signal is transmitted, and N is a positive integer greater than or equal to 1, and the second space division multiplexing is performed.
  • the slot always corresponds to the Mth slot after the slot in which the second reference signal is transmitted, and M is a positive integer greater than or equal to 1.
  • N and M are both configurable values.
  • the first node may request the second node to allocate a space division multiplexing time slot, that is, request a time slot in which the first node can simultaneously transmit data to the second node and the fifth node. Then, the second node configures a second space division multiplexing time slot for the first node, and can simultaneously configure a second reference signal for interference measurement for the second space division multiplexing time slot.
  • the second reference signal and the second space division multiplexing time slot are configured at the same time, and the corresponding relationship between the two can be directly obtained.
  • the second node may also separately configure the second reference signal and the second space division multiplexing time slot, and then indicate the correspondence between the second reference signal and the second space division multiplexing time slot by using the foregoing signaling indication or protocol specified manner. relationship.
  • the first node when requesting to allocate the second space division multiplexing time slot, may simultaneously request to allocate the foregoing first space division multiplexing time slot in one request message, or may separately request to allocate the first space division through two requests. Multiplexed time slots.
  • the number of space division multiplexing slots that the first node requests to allocate in a request message is not specifically limited.
  • the result of the second reference signal may show a data transmission pair between the first node and the fifth node (the first node and the second node)
  • the interference of the data transmission of the uplink backhaul link is small, and it may also indicate that the interference is large.
  • the second node can adopt different processing methods based on different channel measurement results.
  • the second node may configure an uplink transmission parameter for the first node based on the measurement result, and the first node may subsequently transmit data to the second node based on the configured uplink transmission parameter, and simultaneously transmit data to the fifth node; for example, the second node
  • the second indication message may be sent to the first node according to the measurement result, to indicate that the first node does not communicate with the fifth node in the second space division multiplexing time slot.
  • the second node may send a fourth indication message to the first node based on the measurement result, to indicate that the first node does not communicate with the fifth node.
  • the second node may perform channel measurement according to the first reference signal and the second reference signal after performing channel measurement on both the first reference signal and the second reference signal.
  • the result indicates whether the third node and the fifth node can communicate with the first node.
  • the second node after performing channel measurement on the interference measurement SRS1 (one example of the first reference signal) and the interference measurement SRS2 (one example of the second reference signal), the second node indicates that the first node can Transmitting a fifth data signal to the second node on the second space division multiplexing time slot corresponding to the interference measurement SRS2, and transmitting the third data signal to the fifth node by using space division multiplexing, and indicating that the first node is in interference
  • the first spatial division multiplexing time slot corresponding to the measurement SRS1 cannot simultaneously communicate with the second node and the third node.
  • the same analog and digital precoding are used when transmitting the interference measurement SRS2 and transmitting the third data signal, and the third data signal and the fifth data signal are transmitted by using space division multiplexing, that is, the third data signal and the fifth data signal. Simultaneous transmission.
  • the first space division multiplexing time slot and the second space division multiplexing time slot may be different time slots or may be the same time slot.
  • the second node may (For example, a scheduling instruction) selects a data signal corresponding to at most one reference signal (for example, a first data signal or a second data signal) for transmission.
  • a scheduling instruction selects a data signal corresponding to at most one reference signal (for example, a first data signal or a second data signal) for transmission.
  • the N reference signals configured by the second node correspond to one space division multiplexing time slot, and the second node selects at most one reference signal by using an instruction (such as a scheduling instruction). The corresponding data signal is transmitted.
  • the first node may send the fourth data signal to the second node. Simultaneously transmitting the first data signal to the third node, or sending the third data signal to the fifth node while transmitting the fifth data signal to the second node; if the first node receives the scheduling instruction of the second node, A node decides whether to perform data transmission to the third node or the fifth node according to the scheduling instruction.
  • the second node may also select whether to schedule the first node to transmit data to the second node. That is, the first node may not be scheduled by the second node on the first space division multiplexing slot corresponding to the first reference signal, that is, the first node does not necessarily be in the first space division multiplexing slot.
  • the fourth data signal is sent to the second node.
  • the second node may also select whether to schedule the first node to transmit data to the second node.
  • the first node in the second space division multiplexing time slot corresponding to the second reference signal, is not necessarily scheduled by the second node, that is, the first node does not necessarily need to be in the second space division multiplexing time slot.
  • the fifth data signal is sent to the second node.
  • the transmission scheme of the reference signal is adopted by the first port used by the first node to send the first reference signal to the second node, and the first node is used to transmit the first data signal to the third node.
  • the second port is the same port or satisfies the antenna port QCL relationship, so the first node sends the first reference signal through the first port, so that the first node can be simulated to simultaneously transmit data to the second node and the third node (for example, the first In the scenario where the node uses the SDMA method to simultaneously transmit data to the second node and the third node, the first node transmits data to the third node through the second port, and the second node performs channel by receiving the received first reference signal.
  • the measurement can determine the interference generated by the data signal transmitted by the first node to the third node to the data signal transmitted by the first node to the second node. Therefore, the second node may configure an uplink transmission parameter, such as an MCS, for the first node according to the channel measurement result of the first reference signal, and the first node may send the fourth data signal to the second node according to the configured uplink transmission parameter, and pass the second The port transmits a first data signal to the third node. Since the uplink transmission parameter configured by the second node for the first node has taken into account the interference of the first data signal with the fourth data signal, the first node sends the fourth data signal based on the uplink transmission parameter configured by the second node. Sending the first data signal not only improves the spectral efficiency, but also reduces the block error rate of the uplink data transmission.
  • an uplink transmission parameter such as an MCS
  • the embodiment of the present application further provides a reference signal transmission apparatus, which can be used to execute the method performed by the first node in the method shown in FIG. 5.
  • the transmission device 1100 of the reference signal includes a receiving module 1101 and a transmitting module 1102. among them,
  • the receiving module 1101 is configured to receive a first configuration message sent by the second node, where the first configuration message carries resource information for transmitting the first reference signal.
  • the sending module 1102 is configured to send the first reference signal by using the first port according to the first configuration message.
  • the sending module 1102 is further configured to send the first data signal to the third node by using the second port.
  • the first port and the second port are the same port or have an antenna port quasi-co-location QCL relationship, the device is a relay node, and the second node is an upper node of the device.
  • the above first reference signal includes but is not limited to SRS, CSI-RS.
  • the transmit power of the first reference signal is the same as the transmit power of the first data signal; or the difference between the transmit power of the first reference signal and the transmit power of the first data signal is specified Value.
  • the first configuration message is further configured to indicate a correspondence between the first space division multiplexing time slot for transmitting the first data signal and the first reference signal.
  • the first configuration message may further carry resource information for transmitting the second reference signal.
  • the sending module 1102 is further configured to: pass the third port according to the first configuration message. Transmitting the second reference signal; transmitting, by the fourth port, a third data signal to the fifth node, where the third port and the fourth port are the same port or have an antenna port QCL relationship.
  • the first configuration message is further used to indicate a correspondence between a second space division multiplexing time slot for transmitting the third data signal and the second reference signal.
  • the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • the functional modules in the embodiments of the present application may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the integrated modules if implemented in the form of software functional modules and sold or used as separate products, may be stored in a computer readable storage medium.
  • a computer readable storage medium A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .
  • the reference signal transmission apparatus 1100 can be used to perform the method performed by the first node in the transmission method of the reference signal shown in FIG. 5, and the implementation method and technology thereof are not described in detail in the transmission apparatus 1100 of the reference signal. For the effect, refer to the related description in the transmission method of the reference signal shown in FIG. 5.
  • the embodiment of the present application further provides a reference signal transmission apparatus, which may be used to perform the method performed by the first node in the method for transmitting the reference signal shown in FIG. 5, or may be related to the reference signal.
  • a reference signal transmission apparatus which may be used to perform the method performed by the first node in the method for transmitting the reference signal shown in FIG. 5, or may be related to the reference signal.
  • the apparatus 1200 includes at least one processor 1201 for implementing the function of the first node in the method for transmitting a reference signal provided by the embodiment of the present application.
  • Apparatus 1200 can also include at least one memory 1202 for storing program instructions and/or data.
  • Memory 1202 is coupled to processor 1201.
  • Processor 1201 may operate in conjunction with memory 1202.
  • the processor 1201 may execute program instructions stored in the memory 1202. At least one of the at least one memory 1202 may be included in the processor 1201.
  • the device 1200 can also include a communication interface 1203 that can communicate with other devices via the communication interface 1203.
  • Communication interface 1203 can be a circuit, bus, transceiver, or any other device that can be used to interact with information.
  • the other device may be a base station, a UE or a relay node.
  • the processor 1201 can transmit and receive data using the communication interface 1203.
  • the communication interface 1203 is used for data transmission and reception with the second node.
  • connection medium between the communication interface 1203, the processor 1201, and the memory 1202 is not limited in the embodiment of the present application.
  • the embodiment of the present application is connected by a bus between the memory 1202, the processor 1201, and the communication interface 1203 in FIG. 12, and the bus is indicated by a thick line in FIG. 12, and the connection manner between other components is only schematically illustrated. Not limited to limits.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 12, but it does not mean that there is only one bus or one type of bus.
  • the embodiment of the present application further provides a chip, which includes the above communication interface and the foregoing processor, and is used to support the device 1200 to implement any method performed by the first node in the method described in the embodiment shown in FIG. 5.
  • the embodiment of the present application further provides a computer readable storage medium for storing computer software instructions required to execute the foregoing processor, which includes a program for executing the above-mentioned processor.
  • the embodiment of the present application further provides a reference signal transmission apparatus, which can be used to execute the method performed by the second node in the method shown in FIG. 5.
  • the transmission device 1300 of the reference signal includes a transmitting module 1301, a receiving module 1302, and a processing module 1303. among them,
  • the sending module 1301 is configured to send a first configuration message to the first node, where the first configuration message carries resource information for transmitting the first reference signal.
  • the receiving module 1302 is configured to receive, by the first node, the first reference signal that is sent by using the first port according to the first configuration message, where the first port and the second port are the same port or have an antenna port
  • the second port is a port for the first node to send a first data signal to the third node
  • the first node is a relay node
  • the device 1300 is a superior node of the first node.
  • the processing module 1303 is configured to perform channel measurement on the first reference signal.
  • the first reference signal includes, but is not limited to, an SRS, a CSI-RS.
  • the first configuration message is further configured to indicate a correspondence between the first space division multiplexing time slot for transmitting the first data signal and the first reference signal.
  • the first configuration message carries resource information for transmitting a second reference signal; then, the receiving module 1302 is further configured to: receive, by the first node, according to the first configuration message, The third port and the fourth port are the same port or have an antenna port quasi-co-located QCL relationship, and the fourth port is the first node to the fifth node.
  • the port for transmitting the third data signal; the processing module 1303 is further configured to: perform channel measurement on the second reference signal.
  • reference signal transmission apparatus 1300 can be used to perform the method performed by the second node in the transmission method of the reference signal shown in FIG. 5, the implementation manner not described in detail in the transmission apparatus 1300 of the reference signal, and the technical effects thereof. Reference can be made to the related description in the transmission method of the reference signal shown in FIG.
  • the embodiment of the present application further provides a reference signal transmission apparatus, which may be used to perform the method performed by the second node in the method for transmitting the reference signal shown in FIG. 5, or may be related to the reference signal.
  • the transmission device 1300 is the same device.
  • the apparatus 1400 includes at least one processor 1401 for implementing the function of the second node in the method for transmitting a reference signal provided by the embodiment of the present application.
  • Apparatus 1400 can also include at least one memory 1402 for storing program instructions and/or data.
  • Memory 1402 is coupled to processor 1401.
  • Processor 1401 may operate in conjunction with memory 1402.
  • the processor 1401 may execute program instructions stored in the memory 1402. At least one of the at least one memory 1402 may be included in the processor 1401.
  • the device 1400 can also include a communication interface 1403, and the device 1400 can perform information interaction with the other device through the communication interface 1403.
  • Communication interface 1403 can be a circuit, bus, transceiver, or any other device that can be used to interact with information.
  • the other device may be a base station, a UE or a relay node.
  • the processor 1401 can transmit and receive data using the communication interface 1403.
  • the communication interface 1403 is used for data transmission and reception with the first node.
  • connection medium between the communication interface 1403, the processor 1401, and the memory 1402 is not limited in the embodiment of the present application.
  • the embodiment of the present application is connected by a bus between the memory 1402, the processor 1401, and the communication interface 1403 in FIG. 14.
  • the bus is indicated by a thick line in FIG. 14, and the connection manner between other components is only schematically illustrated. Not limited to limits.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 14, but it does not mean that there is only one bus or one type of bus.
  • the embodiment of the present application further provides a chip, which includes the foregoing communication interface and the foregoing processor, and is used to support the device 1400 to implement any method performed by the second node in the method described in the embodiment shown in FIG. 5.
  • the embodiment of the present application further provides a computer readable storage medium for storing computer software instructions required to execute the foregoing processor, which includes a program for executing the above-mentioned processor.
  • the embodiment of the present application further provides a communication system.
  • the communication system 1500 includes the above-described reference signal transmission device 1100 and the above-described reference signal transmission device 1300.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)).
  • a magnetic medium e.g., a floppy disk, a hard disk, a magnetic tape
  • an optical medium e.g., a DVD
  • a semiconductor medium e.g., a solid state disk (SSD)

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Abstract

本申请实施例公开了一种参考信号的传输方法及装置，用以实现中继节点向基站传输参考信号，从而使得基站或中继节点获知下行接入链路对上行回传链路的干扰。方法包括：第一节点接收第二节点发送的第一配置消息，第一配置消息携带用于传输第一参考信号的资源信息；第一节点根据第一配置消息、通过第一端口发送第一参考信号；第二节点对第一参考信号进行信道测量，以确定第一节点向第三节点发送的第一数据信号对第一节点向二节点发送的数据信号的干扰；第一节点通过第二端口向第三节点发送第一数据信号；其中，第一端口和第二端口为同一端口或具有天线端口准共址QCL关系，第一节点为中继节点，第二节点为第一节点的上级节点。

Description

一种参考信号的传输方法及装置
本申请要求于2018年04月11日提交中国专利局、申请号为201810321575.1、发明名称为“一种参考信号的传输方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种参考信号的传输方法及装置。
背景技术
随着移动通信技术的不断发展，频谱资源已经变得格外紧张。目前尚未分配的可以用于无线通信的频谱非常有限。为了提高频谱利用率，未来的基站部署将会更加密集。密集的基站部署就会要求基站的回传链路需要有相应的传输能力。然而，光纤的部署成本较高，这无疑会增大未来无线基站的部署成本。为此，采用无线中继技术则可以很好地解决未来密集基站的部署问题。即，在基站和用户设备之间增加一个或多个中继节点(relay node，RN)，负责对无线信号进行一次或多次转发。
在通常的部署场景下，中继节点的收发天线隔离度较差，因此具有半双工约束。即在中继节点接收上级节点的下行回传链路时，其不能向下级节点发送下行接入(或回传)链路；在中继节点向上级节点发送上行回传链路时，其不能接收来自于下级节点的上行接入(或回传)链路。
在半双工约束下，一种提升频谱效率的方法是采用空分复用(space division multiple access，SDMA)方案，即当中继节点接收上级节点的下行回传链路时，同时接收来自下级节点的上行接入(或回传)链路；或当中继节点向上级节点发送上行回传链路时，同时向下级节点发送下行接入(或回传)链路。例如，在图1所示的通信系统中，RN可以同时向基站和用户设备(user equipment，UE)传输数据。从图1可以看出，对于中继节点来说，下行接入链路的数据传输过程会对上行接入链路的数据传输过程产生干扰。由于下行接入链路的数据传输是由中继节点调度的，因而基站难以获取到下行接入链路的具体调度信息，也就难以获知下行接入链路对上行回传链路的干扰。
发明内容
本申请实施例提供一种参考信号的传输方法及装置，用以实现中继节点向基站传输参考信号，从而使得基站基于参考信号的信道测量，获知下行接入链路对上行回传链路的干扰。
第一方面，本申请实施例提供一种参考信号的传输方法，该方法包括如下步骤：
第一节点接收第二节点发送的第一配置消息，所述第一配置消息携带用于传输第一参考信号的资源信息。
所述第一节点根据所述第一配置消息、通过第一端口发送所述第一参考信号。
所述第一节点通过第二端口向第三节点发送第一数据信号。
其中，所述第一端口和所述第二端口为同一端口或具有天线端口准共址QCL关系， 所述第一节点为中继节点，所述第二节点为所述第一节点的上级节点。
采用上述方案，由于第一节点向第二节点发送第一参考信号所采用的第一端口和第一节点向第三节点传输第一数据信号所采用的第二端口为同一端口或满足天线端口QCL关系，因而第一节点通过第一端口发送第一参考信号，即可模拟在第一节点同时向第二节点和第三节点传输数据(例如，第一节点采用SDMA方式同时向第二节点和第三节点传输数据)的场景下，第一节点通过第二端口向第三节点传输数据的情形，第二节点通过对接收到的第一参考信号进行信道测量，即可确定后续第一节点向第三节点传输的第一数据信号对第一节点向第二节点传输的数据信号(以下称为第四数据信号)所产生的干扰。从而，第二节点可基于第一参考信号的信道测量结果为第一节点配置MCS等上行传输参数，第一节点则可以根据配置的上行传输参数向第二节点发送第四数据信号，通过第二端口向第三节点发送第一数据信号。由于第二节点为第一节点配置的上行传输参数已将第一数据信号对第四数据信号的干扰考虑在内，因此第一节点基于第二节点配置的上行传输参数发送第四数据信号的同时发送第一数据信号，不仅可以提高频谱效率，同时还可以降低上行数据传输的误块率。
需要说明的是，在第一方面提供的方法中，第二节点基于对第一参考信号的信道测量结果可以确定第一节点向第三节点传输的数据信号，对第一节点向第二节点传输的数据信号的干扰，即用于确定第一节点和第三节点间的链路对第一节点和第二节点间的链路的干扰。由于本申请实施例中，第二节点为第一节点的上级节点，因而第一节点至第二节点的链路可以称为回传链路。又由于第三节点可以是第一节点的上级节点，也可以是第一节点的下级节点，因而，第一节点至第三节点间的链路可以为回传链路，也可以为接入链路。当第三节点为第一节点的上级节点时，采用本申请实施例提供的方案可以确定第一节点与第三节点间的回传链路对第一节点和第二节点间的回传链路的干扰。当第三节点为第一节点的下级节点时，采用本申请实施例提供的方案可以确定第一节点与第三节点间的接入链路对第一节点和第二节点间的回传链路的干扰。
在第一方面提供的方法中，第一参考信号可以为探测参考信号SRS。
当第一参考信号为SRS，第二节点可基于对SRS的信道测量结果确定第一数据信号对第四数据信号的干扰。
需要说明的是，基于第二节点对第一参考信号的不同的信道测量结果，第二节点可以采取不同的处理方式。相应地，第一节点也可以采取不同的处理方式。以上所述的第一节点向第三节点发送第一数据信号仅为处理方式中的一种。在这种处理方式中，第二节点基于对第一参考信号的信道测量结果，确定第四数据信号的上行传输参数并通过调度信令通知第一节点。第一节点根据调度信令向第二节点发送第四数据信号，同时通过第二端口向第三节点发送第一数据信号。其中，调度信令一般通过DCI发送。
示例性地，除了上述处理方式以外，第二节点在对第一参考信号进行信道测量后，还可以向第一节点发送第一指示消息，以指示第一节点在用于传输第一数据信号的第一空分复用时隙内不与第三节点进行通信。那么，第一节点在接收到第一指示消息后，在第一空分复用时隙上不向第三节点发送第一数据信号，从而避免发送的第一数据信号对第一节点的上行数据传输产生较大干扰，进而避免恶化第一节点的上行回传链路的误块率性能。其中，第一指示消息可以通过DCI发送。
其中，第一空分复用时隙为第一节点可同时向第二节点和第三节点传输数据的时隙。 也就是说，本申请实施例中，可以将第一节点用于向第二节点传输第四数据信号的时隙复用给第三节点。第一节点可在该时隙上向第三节点发送第一数据信号，该时隙即为第一空分复用时隙。
示例性地，除了上述处理方式以外，第二节点在对第一参考信号进行信道测量后，还可以向第一节点发送第三指示消息，以指示第一节点不与第三节点进行通信。在这种处理方式中，第一数据信号对第四数据信号的干扰更大，第二节点基于该干扰情况，直接否决第三节点与第一节点进行通信的可能性，从而避免第一节点和第三节点的通信对第一节点和第二节点间的上行回传链路产生较大的干扰。其中，第三指示消息除了可以通过DCI发送外，还可以通过MAC CE或RRC信令发送。
在一种可能的设计中，所述第一参考信号的发射功率与所述第一数据信号的发射功率相同；或者，所述第一参考信号的发射功率与所述第一数据信号的发射功率之差为指定数值。
第二节点在对第一参考信号进行信道测量时，若第一参考信号的发射功率与第一数据信号的发射功率相同，则第二节点根据第一参考信号的信道测量结果确定的、第一数据信号对第四数据信号的干扰会更为准确。当然，若第一参考信号的发射功率与第一数据信号的发射功率不同，那么第二节点在获取到第一参考信号的发射功率与第一数据信号的发射功率之差的情况下，也可以准确地确定第一数据信号对第四数据信号的干扰。
在一种可能的设计中，所述第一配置消息还用于指示用于传输所述第一数据信号的第一空分复用时隙与所述第一参考信号的对应关系。
对第一参考信号的信道测量实际是为了确定后续第一节点同时向第二节点和第三节点传输数据的场景下第一数据信号对第四数据信号的干扰。那么，第一节点和第二节点需要对第一参考信号所对应的第一数据信号所占用的时隙位置达成一致：第一节点需获知第一参考信号所对应的时隙，以便确定第一参考信号的预编码等发射参数，使第一参考信号的发射参数与第一数据信号的发射参数一致；第二节点需确定待测量的时隙位置，即第二节点需确定第一节点可以同时向第二节点和第三节点传输数据的时隙，使其通过对第一参考信号进行信道测量后得到的信息可以应用于该时隙的上行传输参数(如MCS)的配置。本申请实施例中，将第一节点传输第一数据信号的时隙称为第一空分复用时隙，由上可知，第一空分复用时隙与第一参考信号的对应关系需要确定。
关于该第一空分复用时隙与第一参考信号的对应关系可以有如下理解：第一参考信号用于测量第一数据信号对上行回传链路造成的干扰，那么第一参考信号与第一数据信号存在对应关系；而第一数据信号是在发送第一参考信号之后发送的，发送第一数据信号的时隙(或时隙位置)与第一数据信号也存在对应关系，该时隙称为第一空分复用时隙。因此，第一空分复用时隙和第一参考信号也存在对应关系，只有确定了该对应关系，才可获知根据第一参考信号得到的测量结果适用于后续哪个时隙(或时隙位置)。
当然，第一空分复用时隙与所述第一参考信号的对应关系除了可通过第一配置消息配置，也可以通过其他配置消息进行配置，本申请实施例中对此不做具体限定。
不难理解，用于传输所述第一数据信号的第一空分复用时隙可基于第一节点的请求进行配置。例如，所述第一节点向所述第二节点发送第一请求消息，所述第一请求消息用于请求分配该第一空分复用时隙；所述第一节点接收所述第二节点发送的第二配置消息，所述第二配置消息携带所述第一空分复用时隙的指示信息。
此外，第三节点与其他节点(例如第四节点)可以采用频分复用、空分复用、时分复用或码分复用等复用方式与第一节点进行通信。此时，第一节点向第二节点发送的第一参考信号除了可用于测量第一节点向第三节点发送的第一数据信号对第四数据信号的干扰，还可以用于测量第一节点向其他节点(例如第四节点)发送的数据信号对第一节点向第二节点发送的数据信号的干扰。
以第三节点与第四节点采用频分或空分复用方式与第一节点进行数据传输为例，在对第一参考信号进行信道测量后，所述第一节点可以通过所述第二端口向第四节点发送第二数据信号，所述第一数据信号和所述第二数据信号采用频分或空分复用方式进行传输。同时，在这种实现方式中，第一参考信号采用频率选择性预编码。
本申请实施例中，第一配置消息除了可用于配置第一参考信号的资源，还可以配置其他参考信号的资源。
在一种可能的设计中，所述第一配置消息携带用于传输第二参考信号的资源信息；所述方法还包括：所述第一节点根据所述第一配置消息、通过第三端口发送所述第二参考信号；所述第一节点通过第四端口向第五节点发送第三数据信号，所述第三端口和所述第四端口为同一端口或具有天线端口QCL关系。
需要说明的是，第二参考信号的资源信息可通过第一配置消息配置，也可以通过其他配置消息配置，本申请实施例中对此不做具体限定。
此外，上述方案也可以扩展至更多参考信号的场景，即第一节点基于第一配置消息配置的参考信号资源可以发送多个参考信号，第二节点基于对多个参考信号的信道测量结果可以分别确定多个节点与第一节点间传输的数据对第一节点向第二节点传输的数据的干扰。
同样地，所述第一配置消息还看用于指示用于传输所述第三数据信号的第二空分复用时隙与所述第二参考信号的对应关系，以便第一节点和第二节点对第二参考信号所对应的第三数据信号所占用的时隙位置达成一致。
其中，第二空分复用时隙为第一节点可同时向第二节点和第五节点传输数据的时隙。也就是说，本申请实施例中，可以将第一节点用于向第二节点传输第五数据信号的时隙复用给第五节点。第一节点可在该时隙上向第五节点发送第三数据信号，该时隙即为第二空分复用时隙。
关于第二空分复用时隙与第二参考信号的对应关系可以有如下理解：第二参考信号用于测量第三数据信号对上行回传链路造成的干扰，那么第二参考信号与第三数据信号存在对应关系；而第三数据信号是在发送第二参考信号之后发送的，发送第三数据信号的时隙(或时隙位置)与第三数据信号也存在对应关系，该时隙称为第二空分复用时隙。因此，第二空分复用时隙和第二参考信号也存在对应关系，只有确定了该对应关系，才可获知根据第二参考信号得到的测量结果适用于后续哪个时隙(或时隙位置)。
与第一空分复用时隙类似，第二空分复用时隙也可以由第二节点基于第一节点的请求配置。例如，所述第一节点向所述第二节点发送第二请求消息，所述第二请求消息用于请求分配第二空分复用时隙；所述第一节点接收所述第二节点发送的第三配置消息，所述第三配置消息携带所述第二空分复用时隙的指示信息。
其中，第二请求消息与第一请求消息可以是同一个消息，也可以是不同的消息。
需要说明的是，基于第二节点对第二参考信号的不同的信道测量结果，第二节点可以 采取不同的处理方式。相应地，第一节点也可以采取不同的处理方式。以上所述的第一节点向第五节点发送第三数据信号仅为处理方式中的一种。在这种处理方式中，第二节点基于对第二参考信号的信道测量结果，确定第五数据信号的上行传输参数并通过调度信令通知第一节点。第一节点根据调度信令向第二节点发送第五数据信号，同时通过第二端口向第五节点发送第三数据信号。其中，调度信令一般通过DCI发送。
示例性地，除了上述处理方式以外，第二节点在对第二参考信号进行信道测量后，还可以向第一节点发送第二指示消息，以指示第一节点在用于传输第三数据信号的第二空分复用时隙内不与第五节点进行通信。那么，第一节点在接收到第二指示消息后，在第二空分复用时隙上不向第五节点发送第三数据信号，从而避免发送的第三数据信号对第一节点的上行数据传输产生较大干扰，进而避免恶化第一节点的上行回传链路的误块率性能。其中，第二指示消息可以通过DCI发送。
示例性地，除了上述处理方式以外，第二节点在对第二参考信号进行信道测量后，还可以向第一节点发送第四指示消息，以指示第一节点不与第五节点进行通信。在这种处理方式中，第三数据信号对第五数据信号的干扰更大，第二节点基于该干扰情况，直接否决第五节点与第一节点进行通信的可能性，从而避免第一节点和第五节点的通信对第一节点和第二节点间的上行回传链路产生较大的干扰。其中，第四指示消息可以通过DCI、MAC CE或RRC信令发送。
第二方面，本申请实施例提供一种参考信号的传输方法，该方法包括如下步骤：
第二节点向第一节点发送第一配置消息，所述第一配置消息携带用于传输第一参考信号的资源信息。
所述第二节点接收所述第一节点根据所述第一配置消息、通过第一端口发送的所述第一参考信号，所述第一端口和第二端口为同一端口或具有天线端口准共址QCL关系，所述第二端口为所述第一节点向第三节点发送第一数据信号的端口，所述第一节点为中继节点，所述第二节点为所述第一节点的上级节点。
所述第二节点对所述第一参考信号进行信道测量。
采用上述方案，由于第一节点向第二节点发送第一参考信号所采用的第一端口和第一节点向第三节点传输第一数据信号所采用的第二端口为同一端口或满足天线端口QCL关系，因而第一节点通过第一端口发送第一参考信号，即可模拟在第一节点同时向第二节点和第三节点传输数据的场景下，第一节点通过第二端口向第三节点传输数据的情形，第二节点通过对接收到的第一参考信号进行信道测量，即可确定后续第一节点向第三节点传输的第一数据信号对第一节点向第二节点传输的第四数据信号所产生的干扰。从而，第二节点可基于第一参考信号的信道测量结果为第一节点配置MCS等上行传输参数，第一节点则可以根据配置的上行传输参数向第二节点发送第四数据信号，通过第二端口向第三节点发送第一数据信号。由于第二节点为第一节点配置的上行传输参数已将第一数据信号对第四数据信号的干扰考虑在内，因此第一节点基于第二节点配置的上行传输参数发送第四数据信号的同时发送第一数据信号，不仅可以提高频谱效率，同时还可以降低上行数据传输的误块率。
在第二方面提供的方法中，第一参考信号可以为探测参考信号SRS。
当第一参考信号为SRS，第二节点可基于对SRS的信道测量确定第一数据信号对第四数据信号的干扰。
基于第二节点对第一参考信号的不同的信道测量结果，第二节点可以采取不同的处理方式。
示例性地，第二节点可以基于对第一参考信号的信道测量结果，确定第四数据信号的上行传输参数并通过调度信令通知第一节点。第一节点根据调度信令向第二节点发送第四数据信号，同时通过第二端口向第三节点发送第一数据信号。其中，调度信令一般通过DCI发送。
示例性地，第二节点在对第一参考信号进行信道测量后，还可以向第一节点发送第一指示消息，以指示第一节点在用于传输第一数据信号的第一空分复用时隙内不与第三节点进行通信。那么，第一节点在接收到第一指示消息后，在第一空分复用时隙上不向第三节点发送第一数据信号，从而避免发送的第一数据信号对第一节点的上行数据传输产生较大干扰，进而避免恶化第一节点的上行回传链路的误块率性能。其中，第一指示消息可以通过DCI发送。
示例性地，第二节点在对第一参考信号进行信道测量后，还可以向第一节点发送第三指示消息，以指示第一节点不与第三节点进行通信。在这种处理方式中，第一数据信号对第四数据信号的干扰更大，第二节点基于该干扰情况，直接否决第三节点与第一节点进行通信的可能性，从而避免第一节点和第三节点的通信对第一节点和第二节点间的上行回传链路产生较大的干扰。其中，第三指示消息可以通过DCI、MAC CE或RRC信令发送。
在一种可能的设计中，所述第一参考信号的发射功率与所述第一数据信号的发射功率相同；或者，所述第一参考信号的发射功率与所述第一数据信号的发射功率之差为指定数值。
第二节点在对第一参考信号进行信道测量时，若第一参考信号的发射功率与第一数据信号的发射功率相同，则第二节点根据第一参考信号的信道测量结果确定的、第一数据信号对第四数据信号的干扰会更为准确。当然，若第一参考信号的发射功率与第一数据信号的发射功率不同，那么第二节点在获取到第一参考信号的发射功率与第一数据信号的发射功率之差的情况下，也可以准确地确定第一数据信号对第四数据信号的干扰。
在一种可能的设计中，所述第一配置消息还用于指示用于传输所述第一数据信号的第一空分复用时隙与所述第一参考信号的对应关系。
第二节点对第一参考信号的信道测量实际是为了确定后续第一节点同时向第二节点和第三节点传输数据的场景下第一数据信号对第四数据信号的干扰。那么，第一节点和第二节点需要对第一参考信号所对应的第一数据信号所占用的时隙位置达成一致：第一节点需获知第一参考信号所对应的时隙，以便确定第一参考信号的预编码等发射参数，使第一参考信号的发射参数与第一数据信号的发射参数一致；第二节点需确定待测量的时隙位置，即第二节点需确定第一节点可以同时向第二节点和第三节点传输数据的时隙，使其通过对第一参考信号进行信道测量后得到的信息可以应用于该时隙的上行传输参数(如MCS)的配置。本申请实施例中，将第一节点传输第一数据信号的时隙称为第一空分复用时隙，由上可知，第一空分复用时隙与第一参考信号的对应关系需要确定。
当然，第一空分复用时隙与所述第一参考信号的对应关系除了可通过第一配置消息配置，也可以通过其他配置消息进行配置，本申请实施例中对此不做具体限定。
第一空分复用时隙的分配可以是第二节点基于第一节点的请求进行分配的。例如，第二节点接收第一节点发送的第一请求消息，该第一请求消息用于请求分配该第一空分复用 时隙；第二节点向第一节点发送第二配置消息，该第二配置消息携带所述第一空分复用时隙的指示信息。
此外，第三节点与其他节点(例如第四节点)可以采用频分复用、空分复用、时分复用或码分复用等复用方式与第一节点进行通信。此时，第二节点接收到的第一参考信号除了可用于测量第一节点向第三节点发送的第一数据信号对第四数据信号的干扰，还可以用于测量第一节点向其他节点(例如第四节点)发送的第二数据信号对第一节点向第二节点发送的第一数据信号的干扰。以第三节点与第四节点采用频分或空分复用方式与第一节点进行数据传输为例，此时，所述第一数据信号和所述第二数据信号采用频分或空分复用方式进行传输。同时，第一参考信号采用频率选择性预编码。
本申请实施例中，第一配置消息除了可用于配置第一参考信号的资源，还可以配置其他参考信号的资源。
在一种可能的设计中，所述第一配置消息携带用于传输第二参考信号的资源信息；所述方法还包括：所述第二节点接收所述第一节点根据所述第一配置消息、通过第三端口发送的所述第二参考信号，所述第三端口和第四端口为同一端口或具有天线端口准共址QCL关系，所述第四端口为所述第一节点向第五节点发送第三数据信号的端口；所述第二节点对所述第二参考信号进行信道测量。
需要说明的是，第二参考信号的资源信息可通过第一配置消息配置，也可以通过其他配置消息配置，本申请实施例中对此不做具体限定。
此外，上述方案也可以扩展至更多参考信号的场景，即第一节点基于第一配置消息配置的参考信号资源可以发送多个参考信号，第二节点基于对多个参考信号的信道测量结果可以分别确定多个节点与第一节点间传输的数据对第一节点向第二节点传输的数据的干扰。
同样地，所述第一配置消息还可用于指示用于传输所述第三数据信号的第二空分复用时隙与所述第二参考信号的对应关系，以便第一节点和第二节点对第二参考信号所对应的第三数据信号所占用的时隙位置达成一致。
与第一空分复用时隙类似，第二空分复用时隙也可以由第二节点基于第一节点的请求配置。例如，所述第二节点接收所述第一节点发送的第二请求消息，所述第二请求消息用于请求分配第二空分复用时隙；所述第二节点向所述第一节点发送的第三配置消息，所述第三配置消息携带所述第二空分复用时隙的指示信息。
其中，第二请求消息与第一请求消息可以是同一个消息，也可以是不同的消息。
需要说明的是，基于第二节点对第二参考信号的不同的信道测量结果，第二节点可以采取不同的处理方式。
示例性地，第二节点可基于对第二参考信号的信道测量结果，确定第五数据信号的上行传输参数并通过调度信令通知第一节点。第一节点根据调度信令向第二节点发送第五数据信号，同时通过第二端口向第五节点发送第三数据信号。其中，调度信令一般通过DCI发送。
示例性地，第二节点在对第二参考信号进行信道测量后，还可以向第一节点发送第二指示消息，以指示第一节点在用于传输第三数据信号的第二空分复用时隙内不与第五节点进行通信。其中，第二指示消息可以通过DCI发送。
示例性地，除了上述处理方式以外，第二节点在对第二参考信号进行信道测量后，还 可以向第一节点发送第四指示消息，以指示第一节点不与第五节点进行通信。其中，第四指示消息可以通过DCI、MAC CE或RRC信令发送。
第三方面，本申请实施例提供一种参考信号的传输装置，该装置包括：
接收模块，用于接收第二节点发送的第一配置消息，所述第一配置消息携带用于传输第一参考信号的资源信息。
发送模块，用于根据所述第一配置消息、通过第一端口发送所述第一参考信号。
所述发送模块，还用于通过第二端口向第三节点发送第一数据信号。
其中，所述第一端口和所述第二端口为同一端口或具有天线端口准共址QCL关系，所述装置为中继节点，所述第二节点为所述装置的上级节点。
在一种可能的设计中，所述第一参考信号为探测参考信号SRS。
在一种可能的设计中，所述第一参考信号的发射功率与所述第一数据信号的发射功率相同；或者，所述第一参考信号的发射功率与所述第一数据信号的发射功率之差为指定数值。
在一种可能的设计中，所述第一配置消息还用于指示用于传输所述第一数据信号的第一空分复用时隙与所述第一参考信号的对应关系。
在一种可能的设计中，所述第一配置消息携带用于传输第二参考信号的资源信息；所述发送模块还用于：根据所述第一配置消息、通过第三端口发送所述第二参考信号；通过第四端口向第五节点发送第三数据信号，所述第三端口和所述第四端口为同一端口或具有天线端口QCL关系。
在一种可能的设计中，所述第一配置消息还用于指示用于传输所述第三数据信号的第二空分复用时隙与所述第二参考信号的对应关系。
第四方面，本申请实施例提供一种参考信号的传输装置，该装置包括：
发送模块，用于向第一节点发送第一配置消息，所述第一配置消息携带用于传输第一参考信号的资源信息。
接收模块，用于接收所述第一节点根据所述第一配置消息、通过第一端口发送的所述第一参考信号，所述第一端口和第二端口为同一端口或具有天线端口准共址QCL关系，所述第二端口为所述第一节点向第三节点发送第一数据信号的端口，所述第一节点为中继节点，所述装置为所述第一节点的上级节点。
处理模块，用于对所述第一参考信号进行信道测量。
在一种可能的设计中，所述第一参考信号为探测参考信号SRS。
在一种可能的设计中，所述第一配置消息还用于指示用于传输所述第一数据信号的第一空分复用时隙与所述第一参考信号的对应关系。
在一种可能的设计中，所述第一配置消息携带用于传输第二参考信号的资源信息；所述接收模块还用于：接收所述第一节点根据所述第一配置消息、通过第三端口发送的所述第二参考信号，所述第三端口和第四端口为同一端口或具有天线端口准共址QCL关系，所述第四端口为所述第一节点向第五节点发送第三数据信号的端口；所述处理模块还用于：对所述第二参考信号进行信道测量。
第五方面，本申请实施例提供了一种参考信号的传输装置，包括：收发器、存储器以及处理器，存储器用于存储处理器所需执行的程序代码。收发器用于该装置和其他装置(例如第一节点或第二节点)之间进行数据收发。处理器用于执行存储器所存储的程序代码， 具体用于执行第一方面至第二方面中任一方面的任意一种设计所述的方法。
第六方面，本申请实施例还提供了一种计算机可读存储介质，用于存储为执行上述第一方面至第二方面中任一方面或任一方面的任意一种设计的功能所用的计算机软件指令，其包含用于执行上述第一方面至第二方面中任一方面或任一方面的任意一种设计所设计的程序。
第七方面，本申请实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面或上述第一方面至第二方面中任一方面或任一方面的任意一种设计所述的方法。
第八方面，本申请实施例提供了一种芯片，所述芯片与存储器相连，用于读取并执行所述存储器中存储的软件程序，以实现上述可实现第一方面至第二方面中任一方面或任一方面的任意一种设计提供的方法。
第九方面，本申请实施例提供了一种芯片，所述芯片包含处理器和存储器，所述处理器用于读取所述存储器中存储的软件程序，以实现上述可实现第一方面至第二方面中任一方面或任一方面的任意一种设计提供的方法。
附图说明
图1为现有技术提供的一种通信系统的结构示意图；
图2为本申请实施例提供的第一种通信系统的结构示意图；
图3为本申请实施例提供的第二种通信系统的结构示意图；
图4为本申请实施例提供的第三种通信系统的结构示意图；
图5为本申请实施例提供的一种参考信号的传输方法的流程示意图；
图6为本申请实施例提供的一种第一节点的时隙分布示意图；
图7为本申请实施例提供的第一种第一节点的资源分布示意图；
图8为本申请实施例提供的第二种第一节点的资源分布示意图；
图9为本申请实施例提供的另一种第一节点的时隙分布示意图；
图10为本申请实施例提供的第三种第一节点的资源分布示意图；
图11为本申请实施例提供的第一种参考信号的传输装置的结构示意图；
图12为本申请实施例提供的第二种参考信号的传输装置的结构示意图；
图13为本申请实施例提供的第三种参考信号的传输装置的结构示意图；
图14为本申请实施例提供的第四种参考信号的传输装置的结构示意图；
图15为本申请实施例提供的第四种通信系统的结构示意图。
具体实施方式
首先，对本申请实施例的应用场景加以介绍。
需要说明的是，本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
本申请实施例可以应用于包含中继节点的通信系统。其中，通信系统包括但不限于长 期演进(long term evolution，LTE)系统，长期演进高级(long term evolution-advanced，LTE-A)系统，增强的长期演进技术(long term evolution-advanced pro，LTE-A-pro)，新无线(new radio，NR)系统、5G网络架构(5 thgeneration system)等通信系统，也可以扩展到如无线保真(wireless fidelity，WiFi)、全球微波互联接入(worldwide interoperability for microwave access，wimax)、以及第三代合作伙伴计划(3rd generation partnership project，3gpp)等标准相关的蜂窝系统。
示例性地，包含中继节点的通信系统可以如图2所示。在图2中，基站可以为中继节点RN1和中继节点RN2提供服务。用户设备UE0可以直接与基站建立通信连接，用户设备UE1可以通过RN1与基站建立通信连接，用户设备UE2可以通过RN2与RN1建立通信连接，进而与基站建立通信连接。此外，UE2也可以通过RN2与基站建立连接。
其中，基站可以是普通的基站(如Node B或eNB)、新无线控制器(new radio controller，NR controller)、5G系统中的gNode B(gNB)、集中式网元(centralized unit)、新无线基站、射频拉远模块、微基站、分布式网元(distributed unit)、传输接收点(transmission reception point，TRP)或传输点(transmission point，TP)或者任何其它无线接入设备，本申请实施例不限于此。
UE是一种向用户提供语音和/或数据连通性的设备，例如，具有无线连接功能的手持式设备、车载设备等。常见的终端例如包括：手机、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，例如智能手表、智能手环、计步器等。
中继节点是一种网络设备，通过无线接入链路为用户设备或下一级中继节点提供数据连接等服务。与一般网络设备不同的是，中继节点通过回传链路与宿主节点连接，其中，宿主节点可以是基站或上一级中继节点。例如，中继节点可以是LTE网络中的RN。在NR中，中继节点可能被命名为rTRP(relay TRP)，IAB节点等。此外，在部分场景中，用户设备也可以作为中继节点。接入链路与回传链路共享频段的中继方式可以称为带内中继，按照这种中继方式进行操作的中继节点可以称为带内中继节点。
具体地，本申请实施例应用于包含中继节点的通信系统，该通信系统至少包含三个节点：第一节点、第二节点、第三节点，如图3所示。其中，第一节点是中继节点，第二节点是第一节点的上级节点。第三节点可以是第一节点的下级节点，也可以是第一节点的另一个上级节点。
其中，上级节点是指可以为下级节点提供服务、可以对下级节点起到一定控制作用(例如，数据调度，波束管理，功率控制等)的节点。一般情况下，上级节点相比其下级节点而言更靠近核心网或控制中心，也就是说，在从基站到UE的下行传输过程中，数据一般先经过上级节点、再经过该节点的下级节点。在某些情形下，上级节点也可以称为上游节点，下级节点也可以称为下游节点。
示例性地，对于图2所示的通信系统而言，基站的下行数据传输路径可以为基站→RN1→RN2→UE2，基站为RN1的上级节点，RN1为RN2的上级节点，RN2为UE2的上级节点；RN1为基站的下级节点，RN2为RN1的下级节点，UE2为RN2的下级节点。
示例性地，对于图2所示的通信系统而言，基站的下行数据传输路径可以为基站→RN2→UE2，基站为RN2的上级节点，RN2为UE2的上级节点；RN2为基站的下级节点，UE2为RN2的下级节点。
示例性地，对于图2所示的通信系统而言，基站的下行数据传输路径可以为基站→RN1→UE1，基站为RN1的上级节点，RN1为UE1的上级节点；RN1为基站的下级节点，UE1为RN1的下级节点。
通过以上示例可以看出，若第一节点为图2中的RN1，则第二节点可以为图2中的基站，第三节点可以为图2中的RN2或UE1；若第一节点为图2中的RN2，则第二节点可以为图2中的基站或RN1，第三节点可以为图2中的UE2。
此外，需注意，本申请实施例中，第三节点可以是第一节点的下级节点，也可以是第一节点的另一个上级节点。例如，若第一节点为图2中的RN1，则第三节点可以为图2中的RN2或UE1，也可以为图2中未示出的、RN1的另一个上级节点；若第一节点为图2中的RN2，则第三节点可以为图2中的UE2，也可以为图2中未示出的、RN2的另一个上级节点。
需要说明的是，在图3所示的通信系统中，第一节点向第二节点和第三节点传输数据时可使用相同的频谱资源，第一节点可以在向第三节点传输数据的同时向第二节点传输数据，例如，第一节点采用SDMA的方式同时向第二节点和第三节点传输数据。上述第一节点同时向第二节点和第三节点传输数据的方案没有使用额外的频谱资源，因而具有频谱效率高、部署成本低等优点。
但是，在采用上述方案进行数据传输时，第一节点向第三节点传输的数据信号(即图3中由第一节点指向第三节点的浅灰色箭头所指示的链路上传输的数据信号)会对第一节点向第二节点传输的数据信号(即图3中由第一节点指向第二节点的深灰色箭头所指示的链路上传输的数据信号)产生干扰(如图3中虚线箭头所示)。由于第二节点难以获知第一节点向第三节点传输的数据信号的具体调度信息，因而第二节点也就难以预估该干扰的信道信息。又由于第二节点需要根据上行数据传输的受干扰情况为(第一节点和第二节点间的)上行回传链路配置上行传输参数，因而第二节点难以准确获取该干扰的信道信息必然会对第二节点配置上行传输参数的准确性产生影响，从而导致误块率等性能恶化。需要指出的是，上行传输参数包括但不限于调制与编码策略(modulation and coding scheme，MCS)、发射功率、传输流数，预编码矩阵等信息。
综上，在第一节点同时向第二节点和第三节点传输数据的情况下，第二节点难以确定第一节点向第三节点传输的数据信号对第一节点向第二节点传输的数据信号的干扰情况，从而导致第二节点难以为上行回传链路准确地配置MCS、传输流数，预编码矩阵等上行传输参数。
为了使本申请更容易被理解，下面对第二节点的一种可能的干扰测量机制进行简要介绍。
第二节点在调度第一节点进行上行传输前需要对传输过程的信号与干扰加噪声比(signal to interference plus noise ratio，SINR)等信道状态信息参数加以估计，以确定恰当的上行传输参数，如传输流数，预编码矩阵，MCS等。以MCS为例，过高的MCS会恶化接收机的误块率性能，而过低的MCS则会降低频谱效率。因此，准确的信道状态信息参数估计是保证链路性能的关键因素之一。
在此干扰测量机制中，信道状态信息参数估计中的测量可分为两部分：期望信道测量及干扰加噪声测量。其中，干扰加噪声的测量较为复杂。其中，期望信道可以是第一节点 至第二节点的信道。
考虑如图4所示的传输场景，在此场景中，第二节点同时调度第一节点和小区内的UE1进行上行传输。若仅考虑第二节点与第一节点间的上行传输的受干扰情况，UE1与第二节点间的上行传输可视作干扰，称为小区内干扰；此外，其他小区用户的上行传输也会对第二节点与第一节点间的上行传输造成干扰，称为小区间干扰。
通常情况下，第二节点在调度第一节点和UE1之前会配置二者传输探测参考信号(sounding reference signal，SRS)，分别记为SRS0和SRS1。考虑第二节点与第一节点间的上行传输，第二节点可通过SRS0测量上行信道，通过SRS1测量UE1上行传输对第一节点上行传输的干扰。由于动态调度，第二节点难以预知小区间干扰的具体情况，而仅能测量干扰的平均功率。在实际实现时，第二节点可在物理上行共享信道(physical uplink share channel，PUSCH)的传输时刻测量小区间干扰的平均功率。
由上述对干扰测量机制的介绍可以看出，第二节点在为第一节点配置MCS等上行传输参数时，仅考虑信道测量、小区内干扰测量和小区间干扰测量，并没有考虑到第一节点同时向第二节点和第三节点传输数据的场景下，第一节点和第三节点间的数据传输对(第一节点和第二节点间的)上行回传链路的数据传输的干扰，因而现有的干扰测量机制会导致第二节点为第一节点配置的上行传输参数准确性低、误块率性能恶化的问题。
因此，本申请实施例提供一种参考信号的传输方法及装置，用以实现第一节点向第二节点传输参考信号，使得第二节点可以通过对该参考信号的信道测量，确定第一节点与第三节点间的数据传输对(第一节点和第二节点间的)上行回传链路的数据传输的干扰。
需要说明的是，本申请实施例中，第二节点基于对第一参考信号的信道测量可以确定第一节点向第三节点传输的数据信号，对第一节点向第二节点传输的数据信号的干扰，即用于确定第一节点和第三节点间的链路对第一节点和第二节点间的链路的干扰。由于本申请实施例中，第二节点为第一节点的上级节点，因而第一节点至第二节点的链路可以称为回传链路。又由于第三节点可以是第一节点的上级节点，也可以是第一节点的下级节点，因而，第一节点至第三节点间的链路可以为回传链路，也可以为接入链路。当第三节点为第一节点的上级节点时，采用本申请实施例提供的方案可以确定第一节点与第三节点间的回传链路对第一节点和第二节点间的回传链路的干扰。当第三节点为第一节点的下级节点时，采用本申请实施例提供的方案可以确定第一节点与第三节点间的接入链路对第一节点和第二节点间的回传链路的干扰。
下面结合附图对本申请实施例提供的参考信号传输方案进行具体说明。
需要说明的是，本申请中所涉及的多个，是指两个或两个以上。另外，需要理解的是，在本申请实施例的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
参见图5，为本申请实施例提供的参考信号传输方法的流程示意图。该方法包括如下步骤。
S501：第一节点接收第二节点发送的第一配置消息。
其中，第一配置消息携带用于传输第一参考信号的资源信息。第一节点为中继节点，第二节点为第一节点的上级节点。第一节点可以是基站，也可以是第二节点的上级中继节点。
具体地，第一参考信号可以为SRS，也可以是信道状态信息参考信号(channel state informationreference signal，CSI-RS)等参考信号。本申请实施例中主要以SRS为例进行叙述，但不排除第一参考信号为其他类型参考信号的可能性。
用于传输第一参考信号的资源信息又可以称为第一参考信号资源的配置信息。实际实现时，第一参考信号资源的配置信息可以包含以下内容的至少一个：第一参考信号资源的ID；第一参考信号资源的端口数目；第一参考信号资源的类型，例如周期性、半持续性、非周期性；第一参考信号资源的时隙配置，例如时隙级的周期及偏移配置；第一参考信号资源的时域资源信息，例如起始正交频分复用(orthogonal frequency division multiplexing，OFDM)符号、重复符号数目等；第一参考信号资源的带宽信息；第一参考信号资源的跳频信息；第一参考信号资源的频域映射位置，例如频域起止位置，频域梳齿位置等；第一参考信号资源的序列信息；第一参考信号的空间关系信息，该空间关系信息可用于指示第一参考信号与其他参考信号的空间准共址(quasi-co-location，QCL)关系，其他参考信号可以是同步信号(synchronization signal，SS)/物理广播信道(physical broadcast channel，PBCH)，信道状态信息参考信号(channel state information-reference signal，CSI-RS)，SRS等。此外，第二节点还可以在第一配置信息中指示第一参考信号的用途，例如波束管理、天线切换、码本上行传输、非码本上行传输等。第一节点会根据所第一参考信号的用途选择恰当的发送方式，例如，选择合适的SRS预编码矩阵，即选择用于传输第一参考信号的端口。
需要注意的是，本申请实施例中的第一参考信号是用于第二节点进行干扰测量的参考信号，因而第一参考信号的资源信息中有两类信息需要特别关注，即第一参考信号的用途以及第一参考信号的空间关系信息。第二节点可以在第一配置消息中将第一参考信号的用途配置为“干扰测量”，使得第一节点可按本申请所述方式(例如选择合适的、用于发送第一参考信号的端口)发送第一参考信号；同时，由于第一参考信号的发射参数由第一节点确定，因而第一配置消息中的第一参考信号的空间关系可以缺省。
上述第一参考信号的资源信息一般由RRC信令配置，当然，本申请实施例中不排除可通过其他信令修改其中部分参数的可能性，例如，可以通过媒体接入控制层控制元素(media access control layer control elment，MAC CE)修改其中部分参数。
此外，当第一参考信号为周期信号时，第一节点可根据第一配置信息直接发送第一参考信号；当第一参考信号为半持续信号时，第一节点需要通过MAC CE激活或去激活第一参考信号的发送；而当第一参考信号为非周期信号时，第一节点则需要通过下行控制信息(downlink control information，DCI)信令触发第一参考信号的发送。
S502：第一节点根据第一配置消息、通过第一端口发送第一参考信号。
如前所述，本申请实施例中，第一节点向第二节点发送的第一参考信号是用于干扰测量的。那么，第二节点在接收到第一节点在S502中发送的第一参考信号后，即可对第一参考信号进行信道测量，从而根据第一参考信号的信道测量结果确定后续第一节点向第三节点传输的数据信号对第一节点向第二节点传输的数据信号所产生的干扰。
其中，第三节点可以为第一节点的下级节点，也可以为第一节点的另一个上级节点。本申请实施例仅限定第一节点可以同时向第二节点和第三节点传输数据(例如，第一节点采用SDMA方式同时向第二节点和第三节点传输数据)，对第三节点不做具体限定。也就是说，无论第三节点是第一节点的上级节点还是第一节点的下级节点，只要第一节点可以 同时向第二节点和第三节点传输数据，第一节点向第三节点传输的数据信号就会对第一节点向第二节点传输的数据信号产生干扰，第二节点即可基于第一参考信号的信道测量结果确定该干扰的信道信息。
应理解，本申请实施例中，第一节点发送第一参考信号的动作发生在第一节点同时向第二节点和第三节点传输数据之前。也就是说，在第一节点同时向第二节点和第三节点进行数据传输之前，第二节点可以先根据对第一参考信号的信道测量结果确定后续第一节点向第三节点传输的数据信号对第一节点向第二节点传输的数据信号所产生的干扰。从而，第二节点在为第一节点配置MCS等上行传输参数时，可以将该干扰考虑在内，使得配置的上行传输参数更为准确。那么，在后续第一节点向第二节点传输数据时，即可基于更为准确的上行传输参数进行传输，提高频率利用率的同时降低上行回传链路的误块率。
具体地，第一节点在发送第一参考信号时，是通过第一端口发送的。这里，第一端口的确定方式如下：假设后续第一节点同时向第二节点和第三节点传输数据信号时是通过第二端口向第三节点传输的，那么第一端口可以与第二端口相同，也可以与第二端口满足天线端口QCL关系。在本申请实施例中，两端口相同是指两端口采用相同的模拟及数字预编码，在忽略信道时变性的情况下，相同端口对应的信道相同。
两个天线端口具有QCL关系是指其中一个天线端口传输符号的信道大尺度特性可以由另一个天线端口传输符号的信道推导得到。即两天线端口对应信道具有相同或相似的信道大尺度特性。其中，信道大尺度特性包含时延扩展、多普勒扩展、多普勒频移、平均增益、平均时延、以及空间接收参数中的一个或多个。NR协议定义了多种QCL关系，例如基于空间参数的QCL关系，即QCL-Type D:{Spatial Rx parameter}，一般来说，具有空间QCL关系的两端口的发射信号具有相同或相似的发送波束方向。
在一种可能的实现方式中，第一端口和第二端口具有QCL关系，其具体含义可以是：发送第一参考信号时的波束方向与第一节点向第三节点发送数据信号时的波束方向相同或相似。
由上述对第一端口和第二端口的介绍不难理解，前面提到的第一参考信号的空间关系可以缺省的原因是：第一节点需要根据自身的调度情况确定第一参考信号的发射参数(例如发送波束方向)，而不是根据第一配置消息确定，因此第一参考信号的空间关系可以缺省。
由于第一端口和第二端口为同一端口或满足天线端口QCL关系，因而第一节点通过第一端口发送第一参考信号，即可模拟在第一节点通过第二端口向第三节点传输数据的情形，第二节点通过对接收到的第一参考信号进行信道测量，即可确定后续第一节点向第三节点传输的数据信号对第一节点向第二节点传输的数据信号所产生的干扰。
S503：第二节点对第一参考信号进行信道测量。
如前所述，第二节点通过对第一参考信号进行信道测量，可确定后续第一节点向第三节点传输的数据信号(以下称为第一数据信号)对第一节点向第二节点传输的数据信号(以下称为第四数据信号)所产生的干扰。可选地，第二节点也可以通过对第一参考信号的信道测量确定第一数据信号对其接收其他信号的干扰。
不难理解，第二节点在对第一参考信号进行信道测量时，若第一参考信号的发射功率与第一数据信号的发射功率相同，则第二节点根据第一参考信号的信道测量结果确定的、第一数据信号对第四数据信号的干扰会更为准确。当然，若第一参考信号的发射功率与第 一数据信号的发射功率不同，那么第二节点在获取到第一参考信号的发射功率与第一数据信号的发射功率之差的情况下，也可以准确地确定第一数据信号对第四数据信号的干扰。
也就是说，第一参考信号的发射功率可以与第一数据信号的发射功率相同；或者，第一参考信号的发射功率与第一数据信号的发射功率之差可以为指定数值。
实际实现时，第一参考信号的发射功率与第一数据信号的发射功率可以通过如下三种方式配置：
方式一
第二节点可通过第一配置消息指示第一参考信号的发射功率与第一数据信号的发射功率相同，或者通过第一配置消息指示第一参考信号的发射功率与第一数据信号的发射功率之差为指定数值。
方式二
可通过协议规定的方式约定第一参考信号的发射功率与第一数据信号的发射功率相同，或者可通过协议规定的方式约定第一参考信号的发射功率与第一数据信号的发射功率之差为指定数值。
方式三
第一节点可以向第二节点上报第一参考信号的发射功率与第一数据信号的发射功率相同，或者第一节点可以将第一参考信号的发射功率与第一数据信号的发射功率之差(即指定数值)上报给第二节点。
如前所述，对第一参考信号的信道测量实际是为了确定后续第一数据信号对第四数据信号的干扰。那么，第一节点和第二节点需要对第一参考信号所对应的第一数据信号所占用的时隙位置达成一致：第一节点需获知第一参考信号所对应的时隙，以便确定第一参考信号的预编码等发射参数，使第一参考信号的发射参数与第一数据信号的发射参数一致；第二节点需确定待测量的时隙位置，即第二节点需确定第一节点可以同时向第二节点和第三节点进行数据传输的时隙，使其通过第一参考信号信道测量得到的信息应用于该时隙的上行传输参数(如MCS)的配置。本申请实施例中，将第一节点传输第一数据信号的时隙称为第一空分复用时隙，由上可知，第一空分复用时隙与第一参考信号的对应关系需要确定。
根据前面的描述，关于该对应关系可以有如下理解：第一参考信号用于测量第一数据信号对上行回传链路造成的干扰，那么第一参考信号与第一数据信号存在对应关系；而第一数据信号是在发送第一参考信号之后发送的，发送第一数据信号的时隙(或时隙位置)与第一数据信号也存在对应关系，该时隙称为第一空分复用时隙。因此，第一空分复用时隙和第一参考信号也存在对应关系，只有确定了该对应关系，才可获知根据第一参考信号得到的测量结果适用于后续哪个时隙(或时隙位置)。
示例性地，如图6所示，考虑第一节点的5个时隙，分别为slot0～slot4。第一节点根据第一配置消息的指示确定slot0用于发送第一参考信号。并且，第一节点可根据第一配置消息或其他配置消息确定与第一参考信号对应的时隙为slot3。那么，当第一节点发送第一参考信号时，可以选择与其在slot3上向第三节点传输数据的端口相同或具有QCL关系的端口，或者，第一节点可根据第一参考信号与slot3的对应关系，联合确定第一参考信号与第一数据信号的预编码矩阵。
第一参考信号所对应的时隙(即第一空分复用时隙)，可在第一配置消息里指示，也可以通过其他配置消息显示或隐式指示。
需要说明的是，第一空分复用时隙与第一参考信号的对应关系除了可采用上述信令(如第一配置消息)指示的方式外，还可以采用协议规定的方式。例如可通过协议规定，第一空分复用时隙总是对应发送第一参考信号的时隙之后的第N个时隙，N为大于或等于1的正整数。其中，N可能是可配置的值。
在一种可能的实现中，第一节点可以向第二节点请求分配空分复用时隙，即请求分配第一节点可同时向第二节点和第三节点传输数据的时隙。而后，第二节点为第一节点配置第一空分复用时隙，并且可以同时为第一空分复用时隙配置用于干扰测量的第一参考信号。在此实现方式中，第一参考信号与第一空分复用时隙同时配置，两者的对应关系也就可以直接得到。
其中，第一空分复用时隙为第一节点可同时向第二节点和第三节点传输数据的时隙。也就是说，本申请实施例中，可以将第一节点用于向第二节点传输第四数据信号的时隙复用给第三节点。第一节点可在该时隙上向第三节点发送第一数据信号，该时隙即为第一空分复用时隙。
当然，第二节点也可以分别配置第一参考信号和第一空分复用时隙，然后通过前述信令指示或协议规定的方式指示第一参考信号和第一空分复用时隙的对应关系。
需要说明的是，本申请实施例对第一节点请求分配的空分复用时隙的数量不做限定，其数量可以为一个，也可以为多个。例如，第一节点确定自身和第二节点进行数据传输时，可以同时与第三节点进行数据传输，另外，第一节点确定自身和第二节点进行数据传输时，也可以同时与另一个节点(例如第五节点)进行数据传输，那么，第一节点可以请求第二节点分配两个空分复用时隙。
此外，第一节点在请求分配空分复用时隙时，还可以同时上报请求分配的空分复用时隙的位置。例如，在图6中，第一节点可请求将slot3和slot4分配为空分复用时隙，第二节点在收到该请求后，可将slot3和slot4配置为空分复用时隙，并可为其配置对应的参考信号。
基于S503中第二节点对第一参考信号的信道测量结果，并结合对第一节点和第二节点间的上行信道的测量、小区内干扰测量和小区间干扰测量，可以更准确地估计第一节点上行数据传输的SINR等信道状态信息参数，从而使得为第一节点配置的上行传输参数更为准确。
由于S503中对第一参考信号的信道测量结果不尽相同，例如对第一参考信号的结果可能显示第一节点和第三节点间传输的数据对(第一节点和第二节点间的)上行回传链路传输的数据干扰较小，也可能显示该干扰较大。那么，基于S503中不同的测量结果，第二节点可以采取不同的处理方式。下面列举其中三种处理方式。
第一种处理方式:
执行前述步骤S503后，执行如下步骤S504。
S504：第一节点通过第二端口向第三节点发送第一数据信号。
其中，第一端口和第二端口为同一端口或具有天线端口准共址QCL关系。
在第一种处理方式中，第二节点可以基于对第一参考信号的信道测量结果，确定第四数据信号的上行传输参数并通过调度信令通知第一节点。第一节点根据调度信令向第二节点发送第四数据信号，同时执行S504通过第二端口向第三节点发送第一数据信号。其中，调度信令一般通过DCI发送。
示例性地，假设第三节点为第一节点的下级节点，在第一种处理方式中，第一节点的资源分布示意图可以如图7所示：第一节点基于第二节点配置的SRS资源发送干扰测量SRS(第一参考信号的一个示例)，第二节点基于对干扰测量SRS的信道测量确定物理下行共享信道(Physical Downlink Share Channel，PDSCH)中传输的第一数据信号对PUSCH中传输的第四数据信号的干扰。其中，发送干扰测量SRS和传输第一数据信号时采用同样的模拟及数字预编码，第一数据信号和第四数据信号的传输采用空分复用方式，即第一数据信号和第四数据信号同时传输。
需要说明的是，图7中，干扰测量SRS为第一参考信号的一个具体示例。其中，“干扰测量”表示该SRS的用途为：测量第一节点至第三节点的链路，对第一节点至第二节点的链路的干扰。具体实现时，第二节点可以通过对干扰测量SRS的信道进行测量，来确定第一节点至第三节点的链路，对第一节点至第二节点的链路的干扰情况。
通常情况下，第二节点会基于第一参考信号的信道测量结果为第一节点的上行数据传输配置MCS等上行传输参数，第一节点则可以根据配置的上行传输参数向第二节点发送第四数据信号，通过第二端口向第三节点发送第一数据信号。由于第二节点为第一节点配置的上行传输参数已将第一数据信号对第四数据信号的干扰考虑在内，因此第一节点基于配置的上行传输参数发送第四数据信号的同时发送第一数据信号，不仅可以提高频谱效率，同时还可以降低上行数据传输的误块率。
结合以上描述可以看出，第一种处理方式可应用于以下场景：第二节点具备中止第一节点向第三节点发送第一数据信号的能力，第二节点在对第一参考信号进行信道测量后，确定若后续第一节点同时发送第一数据信号和第四数据信号，第一数据信号对第四数据信号的干扰在可接收范围内，因而第二节点根据该干扰为第一节点配置上行传输参数，第一节点可在第一空分复用时隙上向第三节点发送第一数据信号，同时根据配置的上行传输参数向第二节点发送第四数据信号。
此外，第一种处理方式还可以应用于如下场景：第二节点不具备中止第一节点向第三节点发送第一数据信号的能力；那么，无论第二节点对第一参考信号的信道测量结果如何，第二节点都要基于第一数据信号对第四数据信号的干扰情况为第一节点配置上行传输参数，第一节点则根据配置的上行传输参数发送第四数据信号，同时向第三节点发送第一数据信号。
第二种处理方式
执行前述步骤S503后，执行如下步骤：第一节点接收第二节点发送的第一指示消息。其中，该第一指示消息用于指示第一节点在用于传输第一数据信号的第一空分复用时隙内不与第三节点进行通信。
一般情况下，该第一指示消息可通过DCI发送，例如可以携带在第二节点对第四数据信号的调度信令中发送。该调度信令中可以配置一个比特用于指示是否允许第一节点在第一空分复用时隙上传输第一数据信号。应注意，当调度信令携带此指示信息时，该调度信息需要提前发送，即在第一空分复用时隙前发送。
在第二种处理方式中，第二节点基于对第一参考信号的信道测量结果，确定如果第一节点后续同时向第二节点和第三节点传输数据信号的话，向第三节点传输的第一数据信号对向第二节点传输的第四数据信号的干扰较大，则第二节点可以通过第一指示消息指示第一节点在第一空分复用时隙内不与第三节点进行通信，避免第一节点向第三节点发送第一 数据信号，从而避免发送的第一数据信号对第一节点的上行数据传输产生较大干扰，进而避免恶化第一节点的上行回传链路的误块率性能。
结合以上描述可以看出，第二种处理方式可应用于以下场景：第二节点具备中止第一节点向第三节点发送第一数据信号的能力，第二节点在对第一参考信号进行信道测量后，确定若后续第一节点同时发送第一数据信号和第四数据信号，第一数据信号对第四数据信号的干扰超出可接收范围内，因而第二节点通过第一指示消息指示第一节点不要在第一空分复用时隙上向第三节点发送第一数据信号。
第三种处理方式
执行前述步骤S503后，执行如下步骤：第一节点接收第二节点发送的第三指示消息。其中，该第三指示消息用于指示第一节点不与第三节点进行通信。
在第三种处理方式中，第二节点基于对第一参考信号的信道测量结果，确定如果第一节点后续同时向第二节点和第三节点传输数据信号的话，向第三节点传输的第一数据信号对向第二节点传输的第四数据信号的干扰特别大，则第二节点可以通过第三指示消息指示第一节点不与第三节点进行通信。
第三种处理方式与第二种处理方式的区别在于：第三种处理方式中，如果第一节点后续同时向第二节点和第三节点传输数据信号，第一数据信号对第四数据信号的干扰更大，第二节点基于该干扰情况，直接否决第三节点与第一节点进行通信的可能性，而并不是像第二种处理方式中那样仅限定第一节点在第一空分复用时隙内不与第三节点进行通信，从而避免第一节点和第三节点的通信对第一节点和第二节点间的上行回传链路产生较大的干扰。此外，上述第二种处理方式中，第一指示消息一般通过DCI发送；而对于第三种处理方式，第三指示消息除了可以通过DCI发送外，还可以通过MAC CE或无线资源控制(radio resource control，RRC)信令发送。
此外，在第三种处理方式中，若发送第一参考信号的时隙与第一空分复用时隙间的间隔较小，第一节点接收到第二节点发送的第三指示消息时，可能已经通过第一空分复用时隙将第一数据信号发送给第三节点。此时，第一节点可根据第三指示消息的指示，在接收到第三指示消息后终止第一节点和第三节点间的通信。或者，为了避免出现上述情况，第二节点发送的第三指示消息可以指示第一节点在向第三节点发送第一数据信号后，不再与第三节点进行通信。
结合以上描述可以看出，第三种处理方式可应用于以下场景：第二节点具备中止第一节点向第三节点发送第一数据信号的能力，第二节点在对第一参考信号进行信道测量后，确定若第一节点与第三节点间的通信对第一节点的上行传输的干扰特别大，因而第二节点通过第三指示消息指示第一节点不与第三节点进行通信。
在一种可能的实现方式中，第三节点与其他节点(例如第四节点)可以采用频分复用、空分复用、时分复用或码分复用等复用方式与第一节点进行通信。那么，S502中，第一节点向第二节点发送的第一参考信号除了可用于测量第一节点向第三节点发送的第一数据信号对第四数据信号的干扰，还可以用于测量第一节点向其他节点(例如第四节点)发送的数据信号对第一节点向第二节点发送的数据信号的干扰。
其中，第四节点可以为第一节点的下级节点，也可以为除第二节点和第三节点之外的、第一节点的另一个上级节点。
以第三节点与第四节点采用频分或空分复用方式与第一节点进行数据传输为例，第一 节点在S502中发送第一参考信号之后，第一节点可通过第二端口向第四节点发送第二数据信号，其中，第一数据信号和第二数据信号采用频分或空分复用方式进行传输。
示例性地，若第三节点和第四节点均为第一节点的下级节点，以频分复用为例，第一节点的资源分布示意图可以如图8所示：第一节点基于第二节点配置的SRS资源发送干扰测量SRS(第一参考信号的一个示例)，其中，第一节点的下行数据传输采用频分复用方式，即第一数据信号和第二数据信号采用频分复用方式进行传输；在同一子频段上，第一节点发送干扰测量SRS和传输下行数据信号(第一数据信号或第二数据信号)时采用同样的模拟及数字预编码。
例如，图8中，第一数据信号在PDSCH的一个子频段上传输，第二数据信号在PDSCH的另一个子频段上传输。第一数据信号和第二数据信号采用频分复用方式进行传输。在传输第一数据信号的子频段上，发送干扰测量SRS和传输第一数据信号时采用同样的模拟及数字预编码；在传输第二数据信号的子频段上，发送干扰测量SRS和传输第二数据信号时采用同样的模拟及数字预编码。所以，干扰测量SRS需采用频率选择性预编码。
在图8所示的实现方式中，第二节点在接收到第一参考信号后，可选择性地对部分频段上的第一参考信号进行信道测量，其测量结果可用于确定第一节点向第四节点发送的数据信号对第一节点向第二节点发送的数据信号的干扰，或者用于确定第一节点向第三节点发送的数据信号对第一节点向第二节点发送的数据信号的干扰。
同样地，在对部分频段上的第一参考信号进行信道测量后，第一节点可选择性地通过第二端口向第四节点发送第二数据信号，或者选择性地通过第二端口向第三节点发送第一数据信号。
本申请实施例中，第一配置消息除了可用于配置第一参考信号的资源，还可以配置其他参考信号的资源。也就是说，第一节点基于第一配置消息配置的参考信号资源可以发送多个参考信号，第二节点基于对多个参考信号的信道测量结果可以分别确定多个节点与第一节点间传输的数据对第一节点向第二节点传输的数据的干扰。
示例性地，第一配置消息携带用于传输第二参考信号的资源信息；那么，第一节点还可以根据第一配置消息、通过第三端口发送第二参考信号；然后，第一节点通过第四端口向第五节点发送第三数据信号，第三端口和第四端口为同一端口或具有天线端口QCL关系。
其中，第五节点可以为第一节点的下级节点，也可以为(除第二节点、第三节点和第四节点之外的)第一节点的另一个上级节点。可选地，第五节点也可以是与第三节点相同的节点，或者，第五节点可以是与第三节点相同的节点，本申请实施例对此不做具体限定。
此外，用于传输第二参考信号的资源信息可通过第一配置消息配置，也可以通过其他配置消息进行配置，本申请实施例对此不做具体限定。
根据前面对第一端口和第二端口的分析可知，第三端口和第四端口为同一端口或满足天线端口QCL关系，其具体含义可以是：发送第二参考信号时的波束方向与发送第三数据信号时的波束方向相同或相似，即发送第二参考信号与发送第三数据信号采用同样的模拟及数字预编码。
第二节点在接收到第二参考信号后，可以对第二参考信号进行信道测量，从而确定后续第一节点同时向第二节点和第五节点传输数据的场景下，第三数据信号对第一节点向第 二节点传输的数据信号(以下称为第五数据信号)所产生的干扰。其中，第五数据信号与第四数据信号可以是同一数据信号，也可以是不同数据信号。
此外，需理解，在通过第一配置消息配置第一参考信号的资源信息和第二参考信号的资源信息时，可以配置两个参考信号资源，也可以在一个参考信号资源上配置两个测量端口(即第一端口和第二端口)，使得第二节点可以分别测量两个链路上传输的数据信号对第一节点向第二节点传输的数据信号的干扰。
采用上述方案，通过第一配置消息可以配置多个参考信号的资源信息，从而使得第二节点可以通过对多个参考信号的信道测量结果分别确定多个链路上传输的多个数据信号对第一节点向第二节点传输的数据信号的干扰。
如前所述，对第二参考信号的信道测量实际是为了确定后续第一节点同时向第二节点和第五节点传输数据的场景下，第三数据信号对第五数据信号的干扰。那么，第一节点和第二节点需要对第二参考信号所对应的第三数据信号所占用的时隙位置达成一致：第一节点需获知第二参考信号所对应的时隙，以便确定第二参考信号的预编码等发射参数，使第二参考信号的发射参数与第三数据信号的发射参数一致；第二节点需确定待测量的时隙位置，即第二节点需确定第一节点可以同时向第二节点和第五节点传输数据的时隙，使其通过对第二参考信号进行信道测量得到的信息可以应用于该时隙的上行传输参数的配置。本申请实施例中，将第一节点传输第三数据信号的时隙称为第二空分复用时隙，由上可知，第二空分复用时隙与第二参考信号的对应关系需要确定。
其中，第二空分复用时隙为第一节点可同时向第二节点和第五节点传输数据的时隙。也就是说，本申请实施例中，可以将第一节点用于向第二节点传输第五数据信号的时隙复用给第五节点。第一节点可在该时隙上向第五节点发送第三数据信号，该时隙即为第二空分复用时隙。
根据前面的描述，关于第二空分复用时隙与第二参考信号的对应关系可以有如下理解：第二参考信号用于测量第三数据信号对上行回传链路造成的干扰，那么第二参考信号与第三数据信号存在对应关系；而第三数据信号是在发送第二参考信号之后发送的，发送第三数据信号的时隙(或时隙位置)与第三数据信号也存在对应关系，该时隙称为第二空分复用时隙。因此，第二空分复用时隙和第二参考信号也存在对应关系，只有确定了该对应关系，才可获知根据第二参考信号得到的测量结果适用于后续哪个时隙(或时隙位置)。
其中，第二空分复用时隙与第二参考信号的对应关系可以通过第一配置消息指示，也可以通过其他配置消息显示或隐式指示。
需要说明的是，第一空分复用时隙与第一参考信号的对应关系以及第二空分复用时隙与第二参考信号的对应关系，可以都通过第一配置消息指示，也可以分别通过两个配置消息指示，本申请实施例中对此不做具体限定。
示例性地，如图9所示，考虑第一节点的5个时隙，分别为slot0～slot4。第一节点根据第一配置消息的指示确定slot0用于发送第一参考信号，slot1用于发送第二参考信号。第一节点可根据第一配置消息或其他配置消息确定与第一参考信号对应的时隙为slot3，与第二参考信号对应的时隙为slot4。那么，当第一节点发送第一参考信号时，可以选择与其在slot3上向第三节点传输数据的端口相同或具有QCL关系的端口，或者，第一节点可根据第一参考信号与slot3的对应关系，联合确定第一参考信号与第一数据信号的预编码矩阵。当第一节点发送第二参考信号时，可以选择与其在slot4上向第五节点传输数据的端口 相同或具有QCL关系的端口，或者，第一节点可根据此第二参考信号与slot4的对应关系，联合确定第二参考信号与第三数据信号的预编码矩阵。
需要说明的是，第一空分复用时隙与第一参考信号的对应关系以及第二空分复用时隙与第二参考信号的对应关系除了可采用上述信令(例如第一配置消息)指示的方式外，还可以采用协议规定的方式。例如可通过协议规定，第一空分复用时隙总是对应发送第一参考信号的时隙之后的第N个时隙，N为大于或等于1的正整数，第二空分复用时隙总是对应发送第二参考信号的时隙之后的第M个时隙，M为大于或等于1的正整数。其中，N和M均为可配置的值。
在一种可能的实现方式中，第一节点可以向第二节点请求分配空分复用时隙，即请求分配第一节点可同时向第二节点和第五节点传输数据的时隙。而后，第二节点为第一节点配置第二空分复用时隙，并且可同时为第二空分复用时隙配置用于干扰测量的第二参考信号。在此实现方式中，第二参考信号与第二空分复用时隙同时配置，两者的对应关系也就可以直接得到。
当然，第二节点也可以分别配置第二参考信号和第二空分复用时隙，然后通过前述信令指示或协议规定的方式指示第二参考信号和第二空分复用时隙的对应关系。
此外，第一节点在请求分配第二空分复用时隙时，可以在一个请求消息中同时请求分配前述第一空分复用时隙，也可以通过两个请求分别请求分配第一空分复用时隙。本申请实施例中对第一节点在一个请求消息中请求分配的空分复用时隙的数量不做具体限定。
和前面介绍的一样，由于对第二参考信号的信道测量结果不尽相同，例如对第二参考信号的结果可能显示第一节点和第五节点间的数据传输对(第一节点和第二节点间的)上行回传链路的数据传输的干扰较小，也可能显示该干扰较大。那么，第二节点基于不同的信道测量结果可以采取不同的处理方式。
比如，第二节点可基于测量结果为第一节点配置上行传输参数，第一节点后续可基于配置的上行传输参数向第二节点传输数据，同时向第五节点传输数据；再比如，第二节点可基于测量结果向第一节点发送第二指示消息，用以指示第一节点在第二空分复用时隙内不与第五节点进行通信。再比如，第二节点可基于测量结果向第一节点发送第四指示消息，以指示第一节点不与第五节点进行通信。
结合前面介绍的第二节点对第一参考信号的信道测量，第二节点可以在对第一参考信号和第二参考信号均进行信道测量后，根据第一参考信号和第二参考信号的信道测量结果对第三节点和第五节点是否可以和第一节点进行通信进行指示。
示例性地，如图10所示，在对干扰测量SRS1(第一参考信号的一个示例)和干扰测量SRS2(第二参考信号的一个示例)进行信道测量后，第二节点指示第一节点可以在干扰测量SRS2对应的第二空分复用时隙上向第二节点发送第五数据信号，同时采用空分复用的方式向第五节点发送第三数据信号，并指示第一节点在干扰测量SRS1对应的第一空分复用时隙上不能同时与第二节点和第三节点进行通信。其中，发送干扰测量SRS2和传输第三数据信号时采用同样的模拟及数字预编码，第三数据信号和第五数据信号的传输采用空分复用方式，即第三数据信号和第五数据信号同时传输。
其中，第一空分复用时隙和第二空分复用时隙可以为不同时隙，也可以为同一个时隙。
在一种可能的实现中，第二节点在配置了上述两个参考信号(即第一参考信号和第二参考信号)的资源信息、并对上述两个参考信号进行信道测量后，可以通过指令(如调度指 令)选择至多一个参考信号所对应的数据信号(例如第一数据信号或第二数据信号)进行传输。这种实现方式也可以扩展至更多参考信号的场景，例如，第二节点配置的N个参考信号对应一个空分复用时隙，第二节点通过指令(如调度指令)选择至多一个参考信号所对应的数据信号进行传输。
在一种可能的实现方式中，仍以上述配置两个参考信号的情况为例，若第一节点未收到第二节点的调度指令，则其可在向第二节点发送第四数据信号的同时向第三节点发送第一数据信号，也可在向第二节点发送第五数据信号的同时向第五节点发送第三数据信号；若第一节点接收到第二节点的调度指令，则第一节点根据调度指令决定是否向第三节点或第五节点进行数据传输。
在另外一种可能的实现中，第二节点在对第一参考信号进行信道测量后，也可以选择是否调度第一节点向第二节点传输数据。也就是说，在第一参考信号所对应的第一空分复用时隙上，第一节点不一定会被第二节点调度，即第一节点不一定会在第一空分复用时隙上向第二节点发送第四数据信号。同样地，第二节点在对第二参考信号进行信道测量后，也可以选择是否调度第一节点向第二节点传输数据。也就是说，在第二参考信号所对应的第二空分复用时隙上，第一节点不一定会被第二节点调度，即第一节点不一定会在第二空分复用时隙上向第二节点发送第五数据信号。
综上，采用本申请实施例提供的参考信号的传输方案，由于第一节点向第二节点发送第一参考信号所采用的第一端口和第一节点向第三节点传输第一数据信号所采用的第二端口为同一端口或满足天线端口QCL关系，因而第一节点通过第一端口发送第一参考信号，即可模拟第一节点同时向第二节点和第三节点传输数据(例如，第一节点采用SDMA方式同时向第二节点和第三节点传输数据)的场景下，第一节点通过第二端口向第三节点传输数据的情形，第二节点通过对接收到的第一参考信号进行信道测量，即可确定后续第一节点向第三节点传输的数据信号对第一节点向第二节点传输的数据信号所产生的干扰。从而，第二节点可基于第一参考信号的信道测量结果为第一节点配置MCS等上行传输参数，第一节点则可以根据配置的上行传输参数向第二节点发送第四数据信号，通过第二端口向第三节点发送第一数据信号。由于第二节点为第一节点配置的上行传输参数已将第一数据信号对第四数据信号的干扰考虑在内，因此第一节点基于第二节点配置的上行传输参数发送第四数据信号的同时发送第一数据信号，不仅可以提高频谱效率，同时还可以降低上行数据传输的误块率。
基于同一发明构思，本申请实施例还提供一种参考信号的传输装置，该装置可用于执行图5所示方法中第一节点所执行的方法。参见图11，该参考信号的传输装置1100包括接收模块1101好发送模块1102。其中，
接收模块1101，用于接收第二节点发送的第一配置消息，所述第一配置消息携带用于传输第一参考信号的资源信息。
发送模块1102，用于根据所述第一配置消息、通过第一端口发送所述第一参考信号。
所述发送模块1102，还用于通过第二端口向第三节点发送第一数据信号。
其中，所述第一端口和所述第二端口为同一端口或具有天线端口准共址QCL关系，所述装置为中继节点，所述第二节点为所述装置的上级节点。
上述第一参考信号包括但不限于SRS、CSI-RS。
可选地，所述第一参考信号的发射功率与所述第一数据信号的发射功率相同；或者，所述第一参考信号的发射功率与所述第一数据信号的发射功率之差为指定数值。
可选地，所述第一配置消息还用于指示用于传输所述第一数据信号的第一空分复用时隙与所述第一参考信号的对应关系。
在一种实现方式中，所述第一配置消息还可携带用于传输第二参考信号的资源信息；那么，所述发送模块1102还用于：根据所述第一配置消息、通过第三端口发送所述第二参考信号；通过第四端口向第五节点发送第三数据信号，所述第三端口和所述第四端口为同一端口或具有天线端口QCL关系。
在上述实现方式中，所述第一配置消息还用于指示用于传输所述第三数据信号的第二空分复用时隙与所述第二参考信号的对应关系。
需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。在本申请的实施例中的各功能模块可以集成在一个处理模块中，也可以是各个模块单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
所述集成的模块如果以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
同样需要说明的是，参考信号的传输装置1100可用于执行图5所示的参考信号的传输方法中第一节点所执行的方法，参考信号的传输装置1100中未详尽描述的实现方式及其技术效果可参见图5所示的参考信号的传输方法中的相关描述。
基于同一发明构思，本申请实施例还提供一种参考信号的传输装置，该装置可用于执行图5所示的参考信号的传输方法中第一节点所执行的方法，也可以是与参考信号的传输装置1100相同的装置。
参见图12，该装置1200中包括至少一个处理器1201，用于实现本申请实施例提供的参考信号的传输方法中第一节点的功能。装置1200还可以包括至少一个存储器1202，用于存储程序指令和/或数据。存储器1202和处理器1201耦合。处理器1201可能和存储器1202协同操作。处理器1201可能执行存储器1202中存储的程序指令。所述至少一个存储器1202中的至少一个可以包括于处理器1201中。
装置1200中还可以包括通信接口1203，装置1200可以通过通信接口1203和其它设备进行信息交互。通信接口1203可以是电路、总线、收发器或者其它任意可以用于进行信息交互的装置。其中，示例性地，该其它设备可以是基站、UE或中继节点。处理器1201可以利用通信接口1203收发数据，示例的，通信接口1203用于与第二节点间的数据收发。
本申请实施例中不限定上述通信接口1203、处理器1201以及存储器1202之间的具体连接介质。本申请实施例在图12中以存储器1202、处理器1201以及通信接口1203之间 通过总线连接，总线在图12中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图12中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
本申请实施例还提供了一种芯片，该芯片包括上述通信接口和上述处理器，用于支持装置1200实现图5所示实施例所述的方法中第一节点执行的任一种方法。
本申请实施例还提供了一种计算机可读存储介质，用于存储为执行上述处理器所需执行的计算机软件指令，其包含用于执行上述处理器所需执行的程序。
基于同一发明构思，本申请实施例还提供一种参考信号的传输装置，该装置可用于执行图5所示方法中第二节点所执行的方法。参见图13，该参考信号的传输装置1300包括发送模块1301、接收模块1302和处理模块1303。其中，
发送模块1301，用于向第一节点发送第一配置消息，所述第一配置消息携带用于传输第一参考信号的资源信息。
接收模块1302，用于接收所述第一节点根据所述第一配置消息、通过第一端口发送的所述第一参考信号，所述第一端口和第二端口为同一端口或具有天线端口准共址QCL关系，所述第二端口为所述第一节点向第三节点发送第一数据信号的端口，所述第一节点为中继节点，装置1300为所述第一节点的上级节点。
处理模块1303，用于对所述第一参考信号进行信道测量。
其中，所述第一参考信号包括但不限于SRS、CSI-RS。
可选地，所述第一配置消息还用于指示用于传输所述第一数据信号的第一空分复用时隙与所述第一参考信号的对应关系。
在一种实现方式中，所述第一配置消息携带用于传输第二参考信号的资源信息；那么，所述接收模块1302还用于：接收所述第一节点根据所述第一配置消息、通过第三端口发送的所述第二参考信号，所述第三端口和第四端口为同一端口或具有天线端口准共址QCL关系，所述第四端口为所述第一节点向第五节点发送第三数据信号的端口；所述处理模块1303还用于：对所述第二参考信号进行信道测量。
需要说明的是，参考信号的传输装置1300可用于执行图5所示的参考信号的传输方法中第二节点所执行的方法，参考信号的传输装置1300中未详尽描述的实现方式及其技术效果可参见图5所示的参考信号的传输方法中的相关描述。
基于同一发明构思，本申请实施例还提供一种参考信号的传输装置，该装置可用于执行图5所示的参考信号的传输方法中第二节点所执行的方法，也可以是与参考信号的传输装置1300相同的装置。
参见图14，该装置1400中包括至少一个处理器1401，用于实现本申请实施例提供的参考信号的传输方法中第二节点的功能。装置1400还可以包括至少一个存储器1402，用于存储程序指令和/或数据。存储器1402和处理器1401耦合。处理器1401可能和存储器1402协同操作。处理器1401可能执行存储器1402中存储的程序指令。所述至少一个存储器1402中的至少一个可以包括于处理器1401中。
装置1400中还可以包括通信接口1403，装置1400可以通过通信接口1403和其它设备进行信息交互。通信接口1403可以是电路、总线、收发器或者其它任意可以用于进行信息交互的装置。其中，示例性地，该其它设备可以是基站、UE或中继节点。处理器1401 可以利用通信接口1403收发数据，示例的，通信接口1403用于与第一节点间的数据收发。
本申请实施例中不限定上述通信接口1403、处理器1401以及存储器1402之间的具体连接介质。本申请实施例在图14中以存储器1402、处理器1401以及通信接口1403之间通过总线连接，总线在图14中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图14中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
本申请实施例还提供了一种芯片，该芯片包括上述通信接口和上述处理器，用于支持装置1400实现图5所示实施例所述的方法中第二节点执行的任一种方法。
本申请实施例还提供了一种计算机可读存储介质，用于存储为执行上述处理器所需执行的计算机软件指令，其包含用于执行上述处理器所需执行的程序。
此外，本申请实施例还提供一种通信系统。如图15所示，该通信系统1500包含上述参考信号的传输装置1100和上述参考信号的传输装置1300。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介 质(例如固态硬盘solid state disk(SSD))等。

Claims (20)

  1. 一种参考信号的传输方法，其特征在于，包括：
    第一节点接收第二节点发送的第一配置消息，所述第一配置消息携带用于传输第一参考信号的资源信息；
    所述第一节点根据所述第一配置消息、通过第一端口发送所述第一参考信号；
    所述第一节点通过第二端口向第三节点发送第一数据信号；
    其中，所述第一端口和所述第二端口为同一端口或具有天线端口准共址QCL关系，所述第一节点为中继节点，所述第二节点为所述第一节点的上级节点。
  2. 如权利要求1所述的方法，其特征在于，所述第一参考信号为探测参考信号SRS。
  3. 如权利要求1或2所述的方法，其特征在于，所述第一参考信号的发射功率与所述第一数据信号的发射功率相同；或者
    所述第一参考信号的发射功率与所述第一数据信号的发射功率之差为指定数值。
  4. 如权利要求1～3任一项所述的方法，其特征在于，所述第一配置消息还用于指示用于传输所述第一数据信号的第一空分复用时隙与所述第一参考信号的对应关系。
  5. 如权利要求1～4任一项所述的方法，其特征在于，所述第一配置消息携带用于传输第二参考信号的资源信息；
    所述方法还包括：
    所述第一节点根据所述第一配置消息、通过第三端口发送所述第二参考信号；
    所述第一节点通过第四端口向第五节点发送第三数据信号，所述第三端口和所述第四端口为同一端口或具有天线端口QCL关系。
  6. 如权利要求5所述的方法，其特征在于，所述第一配置消息还用于指示用于传输所述第三数据信号的第二空分复用时隙与所述第二参考信号的对应关系。
  7. 一种参考信号的传输方法，其特征在于，包括：
    第二节点向第一节点发送第一配置消息，所述第一配置消息携带用于传输第一参考信号的资源信息；
    所述第二节点接收所述第一节点根据所述第一配置消息、通过第一端口发送的所述第一参考信号，所述第一端口和第二端口为同一端口或具有天线端口准共址QCL关系，所述第二端口为所述第一节点向第三节点发送第一数据信号的端口，所述第一节点为中继节点，所述第二节点为所述第一节点的上级节点；
    所述第二节点对所述第一参考信号进行信道测量。
  8. 如权利要求7所述的方法，其特征在于，所述第一参考信号为探测参考信号SRS。
  9. 如权利要求7或8所述的方法，其特征在于，所述第一配置消息还用于指示用于传输所述第一数据信号的第一空分复用时隙与所述第一参考信号的对应关系。
  10. 如权利要求7～9任一项所述的方法，其特征在于，所述第一配置消息携带用于传输第二参考信号的资源信息；
    所述方法还包括：
    所述第二节点接收所述第一节点根据所述第一配置消息、通过第三端口发送的所述第二参考信号，所述第三端口和第四端口为同一端口或具有天线端口准共址QCL关系，所述第四端口为所述第一节点向第五节点发送第三数据信号的端口；
    所述第二节点对所述第二参考信号进行信道测量。
  11. 一种参考信号的传输装置，其特征在于，包括：
    接收模块，用于接收第二节点发送的第一配置消息，所述第一配置消息携带用于传输第一参考信号的资源信息；
    发送模块，用于根据所述第一配置消息、通过第一端口发送所述第一参考信号；
    所述发送模块，还用于通过第二端口向第三节点发送第一数据信号；
    其中，所述第一端口和所述第二端口为同一端口或具有天线端口准共址QCL关系，所述装置为中继节点，所述第二节点为所述装置的上级节点。
  12. 如权利要求11所述的装置，其特征在于，所述第一参考信号为探测参考信号SRS。
  13. 如权利要求11或12所述的装置，其特征在于，所述第一参考信号的发射功率与所述第一数据信号的发射功率相同；或者
    所述第一参考信号的发射功率与所述第一数据信号的发射功率之差为指定数值。
  14. 如权利要求11～13任一项所述的装置，其特征在于，所述第一配置消息还用于指示用于传输所述第一数据信号的第一空分复用时隙与所述第一参考信号的对应关系。
  15. 如权利要求11～14任一项所述的装置，其特征在于，所述第一配置消息携带用于传输第二参考信号的资源信息；
    所述发送模块还用于：
    根据所述第一配置消息、通过第三端口发送所述第二参考信号；
    通过第四端口向第五节点发送第三数据信号，所述第三端口和所述第四端口为同一端口或具有天线端口QCL关系。
  16. 如权利要求15所述的装置，其特征在于，所述第一配置消息还用于指示用于传输所述第三数据信号的第二空分复用时隙与所述第二参考信号的对应关系。
  17. 一种参考信号的传输装置，其特征在于，包括：
    发送模块，用于向第一节点发送第一配置消息，所述第一配置消息携带用于传输第一参考信号的资源信息；
    接收模块，用于接收所述第一节点根据所述第一配置消息、通过第一端口发送的所述第一参考信号，所述第一端口和第二端口为同一端口或具有天线端口准共址QCL关系，所述第二端口为所述第一节点向第三节点发送第一数据信号的端口，所述第一节点为中继节点，所述装置为所述第一节点的上级节点；
    处理模块，用于对所述第一参考信号进行信道测量。
  18. 如权利要求17所述的装置，其特征在于，所述第一参考信号为探测参考信号SRS。
  19. 如权利要求17或18所述的装置，其特征在于，所述第一配置消息还用于指示用于传输所述第一数据信号的第一空分复用时隙与所述第一参考信号的对应关系。
  20. 如权利要求17～19任一项所述的装置，其特征在于，所述第一配置消息携带用于传输第二参考信号的资源信息；
    所述接收模块还用于：
    接收所述第一节点根据所述第一配置消息、通过第三端口发送的所述第二参考信号，所述第三端口和第四端口为同一端口或具有天线端口准共址QCL关系，所述第四端口为所述第一节点向第五节点发送第三数据信号的端口；
    所述处理模块还用于：
    对所述第二参考信号进行信道测量。
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