WO2020182046A1 - Procédé de mesure de signal de référence et appareil de communication - Google Patents

Procédé de mesure de signal de référence et appareil de communication Download PDF

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Publication number
WO2020182046A1
WO2020182046A1 PCT/CN2020/077936 CN2020077936W WO2020182046A1 WO 2020182046 A1 WO2020182046 A1 WO 2020182046A1 CN 2020077936 W CN2020077936 W CN 2020077936W WO 2020182046 A1 WO2020182046 A1 WO 2020182046A1
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WIPO (PCT)
Prior art keywords
reference signal
terminal device
information
port
downlink reference
Prior art date
Application number
PCT/CN2020/077936
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English (en)
Chinese (zh)
Inventor
张鹏
汪凡
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华为技术有限公司
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Publication date
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Publication of WO2020182046A1 publication Critical patent/WO2020182046A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • 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
    • 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
    • H04B7/0613—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 simultaneous transmission
    • H04B7/0615—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 simultaneous transmission of weighted versions of same signal
    • H04B7/0619—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 simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • 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
    • H04B7/0613—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 simultaneous transmission
    • H04B7/0615—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 simultaneous transmission of weighted versions of same signal
    • H04B7/0619—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 simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • the embodiments of the present application relate to the communication field, and in particular, to a reference signal measurement method and communication device.
  • Multi-antenna technology is widely used in long term evolution (LTE), new redio (NR) and other communication systems.
  • the transmitting end can use multiple transmitting beams to send signals to the receiving end, and the receiving end can also use multiple receiving beams to receive signals.
  • the best paired beams are used for transmission and reception.
  • the so-called best paired beam that is, the signal transmitted by the transmit beam in the best paired beam, and the received signal energy obtained when the receive beam in the best paired beam is used to receive the signal is higher than when the signal is transmitted by other transceiver beams. The received signal energy obtained.
  • the best paired beam can be used to perform data scheduling on the UE.
  • the base station uses the transmit beam in the best paired beam to transmit a signal
  • the UE uses the receive beam in the best paired beam to receive the signal.
  • the best paired beam is related to the relative position between the base station and the UE. If the UE is in a high-speed motion state, the location of the UE during actual scheduling will have a larger deviation than the position when the best paired beam was measured previously. The channel conditions will change between, and the best paired beam may fail.
  • the base station Since the previous best paired beam does not match the current channel conditions between the UE and the base station, if the base station still schedules the UE based on the previous best paired beam, the correct signal reception rate will be reduced, thereby reducing the transmission performance of the communication system.
  • the embodiments of the present application provide a reference signal measurement method and a communication device.
  • the base station can obtain the channel state at a specific time, and then establish the correspondence between the best paired beam and time, and solve the communication system caused by the failure of the best paired beam in the high-speed motion scene The problem of reduced transmission performance.
  • a method for measuring a reference signal including: sending first information to a terminal device, the first information being used to indicate a first measurement unit, N receiving ports of the terminal device, and for the terminal device to be A measurement unit receives downlink reference signals through each of the N receiving ports, where N is an integer greater than or equal to 1.
  • the method further includes receiving second information from the terminal device, the second information being used to indicate a downlink measurement result of the first measurement unit.
  • the network device can instruct the terminal device to receive and measure the downlink reference signal through a specific port at a specific time (such as the measuring unit described in the embodiment of the present application) through the first information, and the terminal device also The measurement result can be reported to the network device through the second information. Further, the network device can determine the receiving port with the highest received signal energy at a specific time and the corresponding transmitting port according to the measurement result, and can also determine the best paired beam at a specific time. Furthermore, the network device can determine a time period during which the best paired beam remains unchanged, that is, the effective duration of the best paired beam. The terminal device is in a high-speed motion scene.
  • the network device uses the transmitting beam of the best paired beam to send signals, and the terminal device uses the receiving beam in the best pairing to receive signals so that the signal The received energy is the highest and the interference is the least.
  • the best paired beam can be re-determined to avoid using the best paired beam that has failed to send and receive signals, and to avoid the problem of the transmission performance degradation of the communication system caused by the failure of the best paired beam.
  • the method further includes: receiving port capability information from the terminal device, the port capability information is used to indicate Q port groups of the terminal device, and each of the Q port groups includes one or more port groups. Ports; where, the ports in each port group support simultaneous reception and/or transmission, and different port groups support time division reception and/or transmission, and Q is an integer greater than or equal to 1.
  • the network device may determine the receiving ports that can simultaneously receive the downlink reference signal according to the port capability information reported by the terminal device, and the configured first information may indicate that these receiving ports receive the downlink reference signal in the first measurement unit.
  • the network device may determine that the downlink reference signal cannot be received at the same time according to the port capability information reported by the terminal device, and the configured first information does not indicate that these receiving ports receive the downlink reference signal in the first measurement unit. Taking full account of the port characteristics of the terminal device, the receiving port of the terminal device can be reasonably configured.
  • the method further includes: sending M downlink reference signals to the terminal device through M transmission ports in the first measurement unit, where the M downlink reference signals and the M transmission ports are one by one.
  • M is an integer greater than or equal to 1.
  • the network device configures the downlink reference signal and the transmission port in a one-to-one correspondence. After obtaining the downlink measurement result of the terminal device and reporting it to the network device, the network device can correspond to a downlink reference signal identifier in the downlink measurement result.
  • the transmitting port, further combining the receiving port of the downlink reference signal, can determine a set of optimal paired beams.
  • the second information is used to indicate N target downlink reference signal identifiers, the N target downlink reference signal identifiers correspond to the N receiving ports one by one, and one of the N target downlink reference signal identifiers
  • the target downlink reference signal identifier is the identifier of the target downlink reference signal with the best measurement result on its corresponding receiving port.
  • the downlink measurement result reported by the terminal device may be the downlink reference signal with the best measurement result on the receiving port.
  • the network device may combine the sending port corresponding to the downlink reference signal with the best measurement result to determine a set of best Paired beams. After the best paired beam fails, the best paired beam can be re-determined to avoid using the best paired beam that has failed to send and receive signals, and to avoid the problem of the transmission performance degradation of the communication system caused by the failure of the best paired beam.
  • the second information is also used to indicate N channel quality indicator CQIs, the N CQIs correspond to the N receiving ports one by one, and one CQI of the N CQIs is the corresponding receiving port.
  • the measured CQI is also used to indicate N channel quality indicator CQIs, the N CQIs correspond to the N receiving ports one by one, and one CQI of the N CQIs is the corresponding receiving port. The measured CQI.
  • the terminal device when the terminal device reports the measurement result on the receiving port, it can also report the CQI measured on the receiving port. Further, the network device can also report the CQI pair according to the CQI reported by the terminal device within the effective time of the best paired beam. The terminal equipment performs scheduling.
  • a reference signal measurement method including:
  • the first information is received from the network device, the first information is used to indicate the first measurement unit, the N receiving ports of the terminal device, and the information used by the terminal device to receive the first measurement unit through each of the N receiving ports.
  • a downlink reference signal where N is an integer greater than or equal to 1; and second information is sent to the network device, and the second information is used to indicate the downlink measurement result of the first measurement unit.
  • the method further includes: sending receiving port capability information to the network device, the port capability information is used to indicate Q port groups of the terminal device, and each of the Q port groups includes one or Multiple ports; among them, the ports in each port group support simultaneous reception and/or transmission, and different port groups support time division reception and/or transmission, and Q is an integer greater than or equal to 1.
  • the method further includes: receiving M downlink reference signals from the network device through N receiving ports in the first measurement unit; where M is an integer greater than or equal to 1.
  • the second information is used to indicate N target downlink reference signal identifiers, the N target downlink reference signal identifiers correspond to the N receiving ports one by one, and one of the N target downlink reference signal identifiers
  • the target downlink reference signal identifier is the identifier of the target downlink reference signal with the best measurement result on its corresponding receiving port.
  • the second information is also used to indicate N channel quality indicator CQIs, the N CQIs correspond to the N receiving ports one by one, and one CQI of the N CQIs is the corresponding receiving port.
  • the measured CQI is also used to indicate N channel quality indicator CQIs, the N CQIs correspond to the N receiving ports one by one, and one CQI of the N CQIs is the corresponding receiving port. The measured CQI.
  • a communication device in a third aspect, may be a network device, a device in a network device, or a device that can be matched and used with the network device.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the first aspect.
  • the modules may be hardware circuits, software, or hardware circuits combined with software. .
  • the apparatus includes: a communication unit for sending first information to the terminal device, the first information for indicating the first measurement unit, the N receiving ports of the terminal device, and the terminal device The downlink reference signal received by the first measurement unit through each of the N receiving ports, where N is an integer greater than or equal to 1; the communication unit is also used for receiving second information from the terminal device, and the second information is used for Indicates the downlink measurement result of the first measurement unit.
  • the communication device may further include a processing unit, and the processing unit may be configured to generate the first information, and use the communication unit to send the first information to a terminal device.
  • the processing unit may also use the communication unit to receive the second information from the terminal device, and process the second information, for example, determine the downlink measurement result of the first measurement unit according to the second information.
  • the communication unit is further configured to receive port capability information from the terminal device.
  • the port capability information is used to indicate Q port groups of the terminal device, and each of the Q port groups includes one or more port groups. Ports; where, the ports in each port group support simultaneous reception and/or transmission, and different port groups support time division reception and/or transmission, and Q is an integer greater than or equal to 1.
  • the communication unit is further configured to send M downlink reference signals to the terminal device through M transmission ports in the first measurement unit, where the M downlink reference signals and the M transmission ports are one by one.
  • M is an integer greater than or equal to 1.
  • the second information is used to indicate N target downlink reference signal identifiers, the N target downlink reference signal identifiers correspond to the N receiving ports one by one, and one of the N target downlink reference signal identifiers
  • the target downlink reference signal identifier is the identifier of the target downlink reference signal with the best measurement result on its corresponding receiving port.
  • the second information is also used to indicate N channel quality indicator CQIs.
  • the N CQIs correspond to the N receiving ports one by one, and one of the N CQIs is the corresponding receiving port.
  • a communication device may be a terminal device, a device in a terminal device, or a device that can be matched and used with the terminal device.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the second aspect.
  • the modules may be hardware circuits, software, or hardware circuits combined with software. .
  • the device includes:
  • the communication unit is used to receive first information from the network device, the first information is used to indicate the first measurement unit, the N receiving ports of the terminal device, and the terminal device to pass through the N receiving ports of the first measurement unit.
  • the communication device may further include a processing unit, and the processing unit may be configured to generate the second information, and send the second information to a network device by using the communication unit.
  • the processing unit may also use the communication unit to receive the first information from the terminal device and process the first information.
  • the communication unit is also used to send and receive port capability information to the network device.
  • the port capability information is used to indicate Q port groups of the terminal device.
  • Each of the Q port groups includes one or Multiple ports; among them, the ports in each port group support simultaneous reception and/or transmission, and different port groups support time division reception and/or transmission, and Q is an integer greater than or equal to 1.
  • the communication unit is further configured to receive M downlink reference signals from the network device through N receiving ports in the first measurement unit; where M is an integer greater than or equal to 1.
  • the second information is used to indicate N target downlink reference signal identifiers, the N target downlink reference signal identifiers correspond to the N receiving ports one by one, and one of the N target downlink reference signal identifiers
  • the target downlink reference signal identifier is the identifier of the target downlink reference signal with the best measurement result on its corresponding receiving port.
  • the second information is also used to indicate N channel quality indicator CQIs, the N CQIs correspond to the N receiving ports one by one, and one CQI of the N CQIs is the corresponding receiving port.
  • the measured CQI is also used to indicate N channel quality indicator CQIs, the N CQIs correspond to the N receiving ports one by one, and one CQI of the N CQIs is the corresponding receiving port. The measured CQI.
  • a communication device including at least one processor, configured to implement the methods described in the above-mentioned first aspect and each possible implementation manner.
  • the communication device may further include a memory, which is coupled to the at least one processor, and the at least one processor is configured to implement the above-mentioned first aspect and the methods described in each possible implementation manner.
  • the memory is used to store instructions, and the processor can call and execute the instructions stored in the memory to implement the methods described in the first aspect and various possible implementation manners.
  • the communication device may further include a communication interface, and the communication interface is used for the communication device to communicate with other devices.
  • the other device is a terminal device.
  • the coupling in the embodiments of the present application is an indirect coupling or connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the communication device where it is located includes at least one processor and a communication interface.
  • the at least one processor uses the communication interface to send first information to the terminal device, where the first information is used to indicate the first measurement unit ,
  • the at least one The processor also uses the communication interface to receive second information from the terminal device, where the second information is used to indicate the downlink measurement result of the first measurement unit.
  • the at least one processor further uses the communication interface to receive port capability information from the terminal device.
  • the port capability information is used to indicate the Q port groups of the terminal device, each of the Q port groups A port group includes one or more ports; wherein, the ports in each port group support simultaneous reception and/or transmission, and different port groups support time division reception and/or transmission, and Q is an integer greater than or equal to 1.
  • the at least one processor further uses the communication interface to send M downlink reference signals to the terminal device through M transmission ports in the first measurement unit, where the M downlink reference signals and The M sending ports have a one-to-one correspondence, and M is an integer greater than or equal to 1.
  • the second information is used to indicate N target downlink reference signal identifiers
  • the N target downlink reference signal identifiers correspond to the N receiving ports one by one
  • the downlink reference signal identifier is the identifier of the target downlink reference signal with the best measurement result on the corresponding receiving port.
  • the second information is also used to indicate N channel quality indicator CQIs, N CQIs correspond to N receiving ports one by one, and one CQI of the N CQIs is measured on the corresponding receiving port To the CQI.
  • a communication device including at least one processor, configured to implement the methods described in the second aspect and various possible implementation manners.
  • the communication device may further include a memory, which is coupled to the at least one processor, and the at least one processor is configured to implement the second aspect and the methods described in each possible implementation manner.
  • the memory is used to store instructions, and the processor can call and execute the instructions stored in the memory to implement the above-mentioned second aspect and the methods described in each possible implementation manner.
  • the communication device may further include a communication interface, and the communication interface is used for the communication device to communicate with other devices.
  • the other device is a network device.
  • the communication device where it is located includes: at least one processor and a communication interface.
  • the at least one processor uses the communication interface to receive first information from a network device, where the first information is used to indicate the first The measuring unit, the N receiving ports of the terminal device, and the downlink reference signal for the terminal device to receive at the first measuring unit through each of the N receiving ports, where N is an integer greater than or equal to 1;
  • At least one processor also uses the communication interface to send second information to the network device, where the second information is used to indicate the downlink measurement result of the first measurement unit.
  • the at least one processor further uses the communication interface to send and receive port capability information to the network device.
  • the port capability information is used to indicate the Q port groups of the terminal device, and each of the Q port groups A port group includes one or more ports; wherein, the ports in each port group support simultaneous reception and/or transmission, and different port groups support time division reception and/or transmission, and Q is an integer greater than or equal to 1.
  • the at least one processor further uses the communication interface to receive M downlink reference signals from the network device through the N receiving ports in the first measurement unit; where M is greater than or equal to 1. Integer.
  • the second information is used to indicate N target downlink reference signal identifiers
  • the N target downlink reference signal identifiers correspond to the N receiving ports one by one
  • the downlink reference signal identifier is the identifier of the target downlink reference signal with the best measurement result on the corresponding receiving port.
  • the second information is also used to indicate N channel quality indicator CQIs, N CQIs correspond to N receiving ports one by one, and one CQI of the N CQIs is measured on the corresponding receiving port To the CQI.
  • an embodiment of the present application also provides a computer-readable storage medium, including instructions, which, when run on a computer, cause the computer to execute as described in the foregoing first aspect and/or any one of the implementation manners of the first aspect.
  • the reference signal measurement method described above, or the computer can execute the reference signal measurement method described in any one of the foregoing second aspect and/or the second aspect.
  • the embodiments of the present application also provide a computer program product, including instructions, which when run on a computer, cause the computer to execute the above-mentioned first aspect and/or any one of the implementations of the first aspect
  • the reference signal measurement method, or the computer is caused to execute the reference signal measurement method described in any one of the foregoing second aspect and/or the second aspect.
  • an embodiment of the present application provides a chip system that includes a processor and may also include a memory for implementing the reference signal described in the first aspect and/or any one of the implementation manners of the first aspect
  • the measurement method or is used to implement the reference signal measurement method in any one of the foregoing second aspect and/or the second aspect.
  • the chip system can be composed of chips, or can include chips and other discrete devices.
  • an embodiment of the present application provides a communication system that includes the communication device described in the third aspect and the communication device described in the fourth aspect, or includes the communication device described in the fifth aspect and the communication device described in the sixth aspect Communication device.
  • FIG. 1 is an architecture diagram of a communication system provided by an embodiment of this application.
  • FIG. 2 is a schematic diagram of the best paired beam provided by an embodiment of the application.
  • FIG. 3 is a schematic diagram of the best paired beam provided by an embodiment of the application.
  • FIG. 4 is a structural block diagram of a communication device provided by an embodiment of the application.
  • FIG. 5 is a schematic flowchart of a reference signal measurement method provided by an embodiment of the application.
  • FIG. 6 is a schematic diagram of a measurement unit provided by an embodiment of the application.
  • FIG. 7 is another schematic diagram of a measurement unit provided by an embodiment of the application.
  • FIG. 8 is a schematic flowchart of another reference signal measurement method provided by an embodiment of this application.
  • FIG. 9 is a schematic diagram of the movement of a terminal device according to an embodiment of the application.
  • FIG. 10 is a schematic flowchart of another reference signal measurement method provided by an embodiment of this application.
  • FIG. 11 is another structural block diagram of a communication device provided by an embodiment of this application.
  • FIG. 12 is another structural block diagram of a communication device provided by an embodiment of the application.
  • the technical solutions provided in the embodiments of the present application can be applied to wireless communication between communication devices.
  • the wireless communication between communication devices may include: wireless communication between a network device and a terminal, wireless communication between a network device and a network device, and wireless communication between a terminal and a terminal.
  • wireless communication can also be referred to as "communication” for short, and the term “communication” can also be described as "data transmission", "information transmission” or “transmission”.
  • the technical solution provided by the embodiments of the application can be used for wireless communication between a scheduling entity and a subordinate entity, and those skilled in the art can use the technical solution for wireless communication between other scheduling entities and subordinate entities, such as macro base stations and micro base stations.
  • this embodiment of the present application uses communication between a network device and a terminal device as an example to describe the method provided in the embodiment of the present application.
  • Fig. 1 shows a schematic diagram of a communication system to which the technical solution provided by the embodiments of the present application is applicable.
  • the communication system may include one or more network devices 100 (only one is shown) and can communicate with the network device 100.
  • FIG. 1 is only a schematic diagram, and does not constitute a limitation on the application scenarios of the technical solutions provided by the embodiments of the present application.
  • the network device 100 may be a transmission reception point (TRP), a base station, a relay station, or an access point.
  • the network device 100 may be a network device in a fifth generation (5th Generation, 5G) communication system or a network device in a future evolution network; it may also be a wearable device or a vehicle-mounted device.
  • the network device 100 may also be: a base transceiver station (BTS) in a global system for mobile communication (GSM) or code division multiple access (CDMA) network, and It may be an NB (NodeB) in wideband code division multiple access (WCDMA), or an eNB or eNodeB (evolutional NodeB) in long term evolution (LTE).
  • the network device 100 may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario.
  • cloud radio access network cloud radio access network, CRAN
  • the terminal device 200 may be a user equipment (UE), an access terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE agent, or a UE Devices, etc.
  • the access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication Functional handheld devices, computing devices, processing devices, in-vehicle devices, wearable devices, terminals in 5G networks or terminals in the future evolved public land mobile network (PLMN) network, etc.
  • PLMN public land mobile network
  • the communication system shown in Figure 1 can be an LTE system, an LTE-Advanced system, an NR system, an ultra-reliable low-latency communication (URLLC) scenario, and a narrowband internet (narrowband internet). of things (NB-IoT) systems, enhanced machine type communications (eMTC) systems, etc., but the communication systems to which the method provided in the embodiments of the present application is applicable are not limited to the above-mentioned communication systems.
  • NB-IoT narrowband internet
  • eMTC enhanced machine type communications
  • the technical solutions provided in the embodiments of the present application are applied in a communication system, they can be applied to various access technologies. For example, it can be applied to orthogonal multiple access (orthogonal multiple access, OMA) technology or non-orthogonal multiple access (non-orthogonal multiple access, NOMA) technology. When applied to orthogonal multiple access technology, it can be applied to orthogonal frequency division multiple access (OFDMA) or single carrier frequency division multiple access (single carrier frequency division multiple access, SC-FDMA) technologies , The embodiment of this application does not limit it.
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • SCMA sparse code multiple access
  • MUSA multi-user shared access
  • MUSA pattern split multiple access Entry
  • PDMA pattern division multiple access
  • IGMA interleave-grid multiple access
  • RSMA resource spreading multiple access
  • NCMA non-orthogonal coded multiple access
  • NOCA non-orthogonal coded access
  • the technical solutions provided in the embodiments of the present application can be applied to various scheduling types. For example, it can be applied to authorization-based scheduling or authorization-free scheduling.
  • the network device can send scheduling information to the terminal device through physical layer signaling, the scheduling information carries transmission parameters, and the network device and the terminal device perform data transmission based on the transmission parameters.
  • authorization-free scheduling scheduling information can be pre-configured, or the network device can send scheduling information to the terminal device through high-level signaling, the scheduling information carries transmission parameters, and the network device and the terminal device perform data transmission based on the transmission parameters.
  • authorization-free scheduling may also be referred to as non-dynamic scheduling (without dynamic scheduling), non-dynamic grant (without dynamic grant) or other names, which are not limited in the embodiment of this application.
  • multiple antennas may be deployed on the network device 100 and/or the terminal device 200, and the multiple antenna technology is used for communication, which significantly improves the performance of the wireless communication system.
  • the network device 100 is the transmitting end and the terminal device 200 is the receiving end; in another possible implementation manner, the terminal device 200 is the transmitting end and the network device 100 is the receiving end.
  • the transmitting end can use multiple antennas to send a signal to the receiving end, and the receiving end can use one or more antennas to receive the signal; or the transmitting end can use one antenna to send a signal to the receiving end.
  • the terminal can use multiple antennas to receive the signal.
  • the multiple antennas on the transmitting end or the receiving end form an antenna array.
  • the angle of the transmitting beam determines the angle of the transmitted signal Transmission gain.
  • the equivalent antenna pattern of the antenna array at the transmitting end is used to describe the transmission gain when signals are transmitted at various angles. For example, in a two-dimensional space, if the angle between the transmitting beam and the horizontal direction is 90°, there is a gain of 3dB, and if the transmitting end sends a signal with a 90° transmitting beam, the signal energy can be amplified by 2 times (3dB).
  • the transmitting end transmits a signal with a 60° transmitting beam, it can have a transmission gain of 0 dB.
  • the angle of the receiving signal beam determines the receiving gain of the receiving signal.
  • the equivalent antenna pattern of the antenna array at the receiving end is used to describe the receiving gain when receiving signals at various angles. For example, in a two-dimensional space, when the angle between the receiving beam and the horizontal direction is 90°, it has a gain of 3dB. If the receiving end receives a signal with a 90° receiving beam, the signal energy can be amplified by 2 times. For another example, if a signal is received with a 60° receiving beam, it has a receiving gain of 0 dB.
  • the transmitting end transmits a signal with a specific angle of the transmit beam
  • the receiving end receives the signal with a specific angle of the receive beam
  • the signal can have the highest transmit gain and receive gain, with the least interference, thereby improving the correct signal reception. Rate, improve the transmission performance of the communication system.
  • the transmitting beam and the receiving beam of the specific angle can be referred to as the best paired beam. Using the best paired beam for corresponding transmission and reception can improve the transmission performance of the communication system.
  • each candidate transmitting beam and each candidate receiving beam are traversed, and multiple sets of paired beams are determined.
  • the paired beam with the highest received energy may be determined as the best paired beam.
  • the receiving end has 2 receiving beams, namely RX1 and RX2.
  • there can be 6 groups of paired beams namely TX1-RX1, TX1-RX2, TX2-RX1, TX2-RX2, TX3-RX1, TX3-RX2.
  • the port may be understood as an antenna port.
  • the understanding of the antenna port may be as described in the LTE protocol 36.211 or the NR protocol 38.211.
  • the channel transmitted through the antenna port on a certain time domain symbol can be inferred from the channel transmitted through the antenna port on other time domain symbols.
  • the time domain symbol may be an orthogonal frequency division multiplexing (OFDM) symbol or a single carrier frequency division multiple access (SC-FDMA) symbol.
  • the transmitting end uses the transmitting beam to send signals through the transmitting port
  • the receiving end uses the receiving beam to receive signals through the receiving port.
  • the ports described in the embodiments of the present application may be physical antenna ports or logical antenna ports. Different physical antenna ports can receive signals or transmit signals at the same time.
  • One or more physical antenna ports may correspond to or be equivalent to one logical antenna port, and transmit signals through the same beam. For some devices, after sending a signal on one analog beam, it needs to be switched to send a signal on another analog beam. Similarly, after the receiving end receives a signal on one analog beam, it needs to be switched to receive the signal on another analog beam. Therefore, physical antenna ports belonging to different logical antenna ports cannot receive signals at the same time, nor can they send signals at the same time. For example, ports 1 to 4 form a logical antenna port, which can send signals through the same analog beam. Ports 5 to 8 form a logical antenna port, which can send signals through the same analog beam.
  • any two of ports 1 to 4 can receive signals or send signals at the same time
  • any two of ports 5 to 8 can receive signals or send signals at the same time
  • ports 1 to 4 cannot It can send or receive at the same time as the ports of port 5 to port 8.
  • port 4 cannot send or receive signals at the same time as port 5.
  • network equipment and terminal equipment need to pass channel measurement to determine the best paired beam. After the network device determines the best paired beam, it uses the transmit beam in the best paired beam to send signals, and the terminal device uses the receive beam in the best paired to receive signals, which can obtain better signal transmission performance.
  • the terminal device is stationary or moving slowly, the channel conditions between the network device and the terminal device will not change much. It can be considered that the channel condition when the network device determines the best paired beam is the same as when the network device actually schedules the terminal device. The channel conditions are similar, so it can be considered that the best paired beam predetermined by the network device and the channel conditions between the network device and the terminal device are always matched, and the best paired beam does not fail.
  • the terminal equipment is in a high-speed motion state, the channel conditions between the network equipment and the terminal equipment are unstable, and the channel conditions when the network equipment actually schedules the terminal equipment are quite different from the channel conditions when the optimal paired beam is determined.
  • the best paired beam fails. If the network device still uses the transmit beam in the previously determined best paired beam to send signals, the terminal device still uses the receive beam in the previously determined best paired beam because the previously determined best paired beam does not match the current channel conditions , It will reduce the correct reception rate of the signal, thereby reducing the transmission performance of the communication system.
  • CSI channel state information
  • the best paired beam determined by the network device after channel measurement is TX1-RX2. Since the terminal device is in high-speed motion, the channel conditions between the network device and the network device have changed. The best paired beam has changed, for example, it becomes TX2-RX1.
  • the network device sends first information to the terminal device, and the first information is used to indicate the first measurement unit, the N receiving ports of the terminal device, and the terminal device in the first measurement unit.
  • the network device may also receive second information from the terminal device, where the second information is used to indicate the downlink measurement result of the first measurement unit.
  • the network device can instruct the terminal device to receive and measure the downlink reference signal through a specific port at a specific time (such as the measuring unit described in the embodiment of the present application) through the first information, and the terminal device also The measurement result can be reported to the network device through the second information.
  • the network device can determine the receiving port with the highest received signal energy at a specific time and the corresponding transmitting port according to the measurement result, and can also determine the best paired beam at a specific time. Furthermore, the network device can determine a time period during which the best paired beam remains unchanged, that is, the effective duration of the best paired beam.
  • the terminal device is in a high-speed motion scene. Within the effective time of the best paired beam, the network device uses the transmitting beam of the best paired beam to send signals, and the terminal device uses the receiving beam in the best pairing to receive signals so that the signal The received energy is the highest and the interference is the least. After the best paired beam fails, the best paired beam is re-determined to avoid using the best paired beam that has failed to send and receive signals, and to avoid the problem of the transmission performance degradation of the communication system caused by the failure of the best paired beam.
  • the network device and terminal may include a hardware structure and/or software module, and the above functions are implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above-mentioned functions is executed in a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • the communication method provided in the embodiment of the present application may be applied to the communication device shown in FIG. 4, and the communication device may be the network device 100 or the terminal device 200 in the communication system shown in FIG. As shown in FIG.
  • the communication device may include at least one processor 401, configured to implement the communication method provided in the embodiment of the present application.
  • the communication device may also include a memory 402 and a communication interface.
  • the communication interface is the transceiver 403 as an example.
  • the communication device may also include a communication bus 404, which may be used for information exchange between devices, units or modules in the communication device.
  • the processor 401 is the control center of the communication device, and may be a processor or a collective name for multiple processing elements.
  • the processor 401 is a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • microprocessors digital signal processors, DSP
  • FPGA field programmable gate arrays
  • the processor 401 and the memory 402 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 401 can execute various functions of the communication device by running or executing instructions stored in the memory 402 and calling data stored in the memory 402.
  • the processor 401 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 4.
  • the communication device may include multiple processors, such as the processor 401 and the processor 405 shown in FIG. 4.
  • processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU).
  • the processor here may refer to one or more communication devices, circuits, and/or processing cores for processing data (for example, computer program instructions).
  • the memory 402 may be a read-only memory (ROM) or other types of static storage communication devices that can store static information and instructions, a random access memory (RAM), or other types that can store information and instructions.
  • the type of dynamic storage communication device can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, Optical disc storage (including compressed optical discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage communication devices, or can be used to carry or store desired program codes in the form of instructions or data structures. Any other medium that can be accessed by the computer, but not limited to this.
  • the memory 402 may exist independently and is connected to the processor 401 through the communication bus 404.
  • the memory 402 may also be integrated with the processor 401.
  • the memory 402 is used to store a software program that executes the solution of the embodiment of the present application, and is controlled to execute by the processor 401.
  • the transceiver 403 is used for communication with the second device.
  • the communication interface is used for communication between the communication device shown in FIG. 4 and other devices or networks, and the communication interface may be a transceiver, a circuit, a module, or an interface.
  • the transceiver 403 can also be used to communicate with communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (Wireless Local Area Networks, WLAN), etc.
  • the transceiver 403 may include a receiving unit to implement a receiving function, and a sending unit to implement a sending function.
  • the communication bus 404 may be an industry standard architecture (ISA) bus, an external communication device interconnection (peripheral component, PCI) bus, or an extended industry standard architecture (extended industry standard architecture, EISA) bus.
  • ISA industry standard architecture
  • PCI peripheral component
  • EISA extended industry standard architecture
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in FIG. 4 to represent it, but it does not mean that there is only one bus or one type of bus.
  • the structure of the communication device shown in FIG. 4 does not constitute a limitation on the communication device, and may include more or fewer components than shown, or a combination of some components, or a different component arrangement.
  • the embodiment of the present application provides a reference signal measurement method. As shown in FIG. 5, the method includes the following steps:
  • a network device sends first information to a terminal device, where the first information indicates the first measurement unit, the N receiving ports of the terminal device, and the terminal device through each of the N receiving ports in the first measurement unit.
  • Downlink reference signal received by a port.
  • At least one parameter in the first measurement unit, the N receiving ports of the terminal device, and the downlink reference signal that the terminal device receives at the first measurement unit through each of the N receiving ports may be pre-configured , It can also be indicated by the network device to the terminal device.
  • the first measurement unit is pre-configured, and the network device instructs the terminal device of the N receiving ports of the terminal device and is used for the terminal device to receive the N receiving ports in the first measurement unit through each of the N receiving ports.
  • Downlink reference signal Illustratively again, the first measurement unit and the N receiving ports of the terminal device are pre-configured, and the network device instructs the terminal device for the terminal device to receive the first measurement unit through each of the N receiving ports.
  • the downlink reference signal is provided.
  • the network device sends first information to the terminal device.
  • the first information is used to indicate the first measurement unit, the N receiving ports of the terminal device, and the first measurement unit to pass the N receiving ports.
  • the network device may indicate the first measurement unit, the N receiving ports of the terminal device, and the N receiving ports of the terminal device through 2 or 3 different signalings to the terminal device, and pass the N The downlink reference signal received by each of the two receiving ports.
  • the first measurement unit is any measurement unit in the measurement period configured by the network device.
  • the measurement unit can be a unit length in the time domain, for example: the length of a measurement unit can be a positive integer number of symbols, time slots, subframes, etc. in the time domain, or 0.5 milliseconds (millisecond, ms), 1 ms, 5 ms in the time domain Wait for positive milliseconds or positive integer seconds.
  • the positive integer may be an integer greater than or equal to 1, for example, an integer of 1, 2, 3 or greater.
  • the measurement period can be a unit length in the time domain.
  • the length of a measurement unit can be a positive integer number of symbols, time slots, subframes, etc. in the time domain, or a positive integer number of milliseconds or a positive integer number of seconds, such as 5ms and 10ms in the time domain.
  • the receiving port refers to the port through which the terminal device receives a signal (such as a downlink reference signal).
  • a signal such as a downlink reference signal
  • the name of the port is not limited to the aforementioned "receiving port", but may also be other names, such as the first port, the receiving port on the terminal device side, and so on.
  • the downlink reference signal may be a reference signal (reference signal, RS), for example, a channel state information reference signal (channel state information-reference signal, CSI-RS).
  • the downlink reference signal may be a pilot signal (pilot), for example, a common-pilot channel (Common-Pilot Channel).
  • the downlink reference signal may be another downlink signal that can be used for channel estimation or channel measurement.
  • RS reference signal
  • pilot pilot
  • Common-pilot channel Common-pilot channel
  • the downlink reference signal may be another downlink signal that can be used for channel estimation or channel measurement.
  • the first information may include the identification of the first measurement unit, the identification of the N receiving ports, and the sequence information and/or time domain resource information of the downlink reference signal received by each of the N receiving ports.
  • the identifiers of the N receiving ports are used to indicate the N receiving ports that receive the downlink reference signal in the first measurement unit, and the terminal device can determine the N receiving ports through which the first measurement unit receives the downlink reference signal according to the identifiers of the N receiving ports.
  • Downlink reference signal of network equipment is used to indicate the N receiving ports that receive the downlink reference signal in the first measurement unit, and the terminal device can determine the N receiving ports through which the first measurement unit receives the downlink reference signal according to the identifiers of the N receiving ports.
  • the sequence information of the downlink reference signal received by each of the N receiving ports is used to determine the sequence value of the downlink reference signal.
  • the sequence value of the downlink reference signal may be the sequence value of the reference signal described in the LTE standard 36.211 or the NR standard 38.211.
  • the sequence information of the downlink reference signal received by each receiving port may be the initial value and cyclic shift of the reference signal.
  • the sequence value of the downlink reference signal may be a real number, for example, the sequence value may be 11111 or -1-1-1-1-1.
  • the sequence value of the downlink reference signal may also be a complex number.
  • the sequence value may be 1+j, 1-j, 1+j, 1+j, 1-j.
  • the time-frequency resource of the downlink reference signal received by each of the N receiving ports may be the time-domain resource and/or frequency-domain resource of the downlink reference signal.
  • the time domain resource of the downlink reference signal received by each of the N receiving ports is used to determine the resource location of the downlink reference signal in the time domain, such as the time slot where the downlink reference signal is located, and/or the time domain symbol.
  • the frequency domain resource of the downlink reference signal received by each of the N receiving ports is used to determine the resource location of the downlink reference signal in the frequency domain, for example, the resource block (RB) where the downlink reference signal is located, and/ Or sub-carrier, etc.
  • the locations of the time-frequency resources of different ports may be the same or different, which is not limited in the embodiment of the present application.
  • the network device sends the downlink reference signal 1, the downlink reference signal 2 and the downlink reference signal 3 in the first measurement unit, and the network device configures the terminal device to receive the downlink reference signal through the receiving port 1 and the receiving port 2 in the first measurement unit.
  • the first information includes the identifier of the receiving port 1, the identifier of the receiving port 2, the sequence information of the three downlink reference signals, and the above-mentioned three downlink reference signal time-frequency resources.
  • the sequences used by reference signals 1 to 3 are sequence 1, sequence 2, and sequence 3
  • the time-frequency resources used by reference signals 1 to 3 are time-frequency resource 1, time-frequency resource 2, and time-frequency resource 3, respectively.
  • the terminal device can distinguish 3 downlink reference signals according to different sequence resources or time-frequency resources.
  • the network device configures the terminal device to measure the reference signal 1 and reference signal 2 for the receiving port 1, and the terminal device measures the reference signal 1 and the reference signal 3 for the receiving port 2.
  • the identifier of the receiving port 1 in the first information corresponds to the reference signal 1, the sequence information of the reference signal 2, and the time domain resource information, and the identifier of the receiving port 2 the reference signal 1, the sequence information of the reference signal 3, and the time domain resource information correspond.
  • the terminal device may determine to receive and measure the reference signal 1 and the reference signal 2 for the receiving port 1 and to receive and measure the reference signal 1 and the reference signal 3 for the receiving port 2 according to the first information.
  • the network device sends the reference signal 1 the terminal device will receive and measure the receiving port 1 and the receiving port 2.
  • the network device sends the reference signal 2
  • the terminal device will receive and measure the receiving port 1.
  • the network device sends the reference signal 3 the terminal device will receive and measure the receiving port 2.
  • the network device receives second information from the terminal device, where the second information is used to indicate a downlink measurement result of the first measurement unit.
  • the downlink measurement result of the first measurement unit is a measurement result of the terminal device on the downlink reference signal, and the downlink reference signal is received by the terminal device through the N receiving ports in the first measurement unit.
  • the terminal device receives the downlink reference signal issued by the network device through the receiving port, and measures the received downlink reference signal to obtain the measurement result. After the terminal device completes the measurement, it may report the downlink measurement result of the downlink reference signal received in the first measurement unit to the network device through the second information. In specific implementation, the terminal device may receive the downlink reference signal in the first measurement unit, and measure the downlink reference signal in the first measurement unit. Or, the terminal device receives the downlink reference signal in the first measurement unit, but measures the downlink reference signal received by the first measurement unit in other measurement units. For example, the measuring unit after the first measuring unit measures the downlink reference signal received by the first measuring unit.
  • the second information is used to indicate N target downlink reference signal identifiers, where the N target downlink reference signal identifiers correspond to the N receiving ports one by one, and among the N target downlink reference signal identifiers
  • a target downlink reference signal identifier is the identifier of the target downlink reference signal with the best measurement result on its corresponding receiving port. That is, for each receiving port indicated by the first information, the terminal device may report the identifier of the downlink reference signal with the best measurement result on this port.
  • the downlink reference signal with the best measurement effect on a certain receiving port is referred to as the target downlink reference signal on the receiving port.
  • the downlink reference signals with the best measurement results on different receiving ports may be the same or different, that is, the target downlink reference signal identifiers corresponding to different receiving ports may be the same or different.
  • receiving port 1 receives and measures downlink reference signal 1
  • downlink reference signal 2 receives and measures downlink reference signal 2, downlink reference signal 3.
  • the best measurement result on receiving port 1 is downlink reference signal 1.
  • the best measurement result on port 2 is downlink reference signal 3, and the target downlink reference signal identifiers corresponding to receiving port 1 and receiving port 2 are different.
  • the best measurement result on receiving port 1 is downlink reference signal 2
  • the best measurement result on receiving port 2 is downlink reference signal 2
  • the target downlink reference signal identifiers corresponding to receiving port 1 and receiving port 2 are the same.
  • the downlink measurement result obtained by the terminal device measuring the downlink reference signal may be a parameter used to evaluate the received energy level of the downlink reference signal.
  • the aforementioned downlink measurement result may be the channel quality indicator (CQI) of the line reference signal, the reference signal receiving power (RSRP), the signal to interference plus noise ratio (singal-to-interference-and- noise ratio, SINR).
  • CQI channel quality indicator
  • RSRP reference signal receiving power
  • SINR signal to interference plus noise ratio
  • the measurement results of each receiving port in the second information are arranged in a specific order. This sequence is pre-configured or configured by network equipment through signaling.
  • the measurement results in the second information are arranged in order of ports.
  • the second information sequentially includes the measurement result of the receiving port 1, the measurement result of the receiving port 2, and the measurement result of the receiving port 3.
  • the network device receives port capability information from the terminal device, where the port capability information is used to indicate Q port groups of the terminal device, and each of the Q port groups includes one or more ports.
  • the ports in each port group support simultaneous reception and/or transmission, and different port groups support time division reception and/or transmission.
  • the number of ports included in different port groups may be the same or different, which is not limited in the embodiment of the present application.
  • the ports in the same port group belong to the same analog beam, and the ports in different port groups belong to different analog beams. After a terminal device uses a certain analog beam to transmit and receive, it needs to be switched before using other analog beams to transmit and receive. Therefore, receiving ports of the same port group can receive signals or send signals at the same time, and receiving ports belonging to different port groups cannot receive signals or send signals at the same time, that is, support time division reception and/or transmission.
  • the network device may configure the foregoing first information according to the foregoing receiving port capability information. Specifically, the network device determines that some receiving ports of the terminal device can receive signals at the same time according to the port capability information, and the first information may include the identifiers of these receiving ports. For example, receiving port 1 and receiving port 2 belong to the same port group and can receive signals at the same time. The first information may include the identifier of the receiving port 1 and the identifier of the receiving port 2, and the receiving port 1 and the receiving port 2 are simultaneously receiving and measuring in the first measuring unit. The network device determines according to the port capability information that some receiving ports of the terminal device cannot receive signals at the same time, and the first information cannot include the identifiers of these receiving ports at the same time.
  • receiving port 1 and receiving port 5 do not belong to the same port group and cannot receive signals at the same time.
  • the first information cannot include the identifier of the receiving port 1 and the identifier of the receiving port 5 at the same time, that is, the receiving port 1 and the receiving port 5 cannot simultaneously receive and measure in the first measuring unit.
  • the method shown in FIG. 5 further includes: the network device sends M downlink reference signals to the terminal device through M transmission ports in the first measurement unit, where the M downlink reference signals and the M There is a one-to-one correspondence between the sending ports, and the M is an integer greater than or equal to 1.
  • the M downlink reference signals have their own identifiers, and different downlink reference signals can be distinguished by the identifiers of the downlink reference signals.
  • each downlink reference signal is sent through a designated sending port.
  • the network device After the network device obtains the target downlink reference signal identifier corresponding to a receiving port in the second information, it determines the sending port for sending the target downlink reference signal according to the target downlink reference signal identifier, and then combines the target downlink reference signal with the receiving port corresponding to the target downlink reference signal. A set of best paired beams can be determined.
  • the second information includes the identifier of the receiving port 1 and the target downlink reference signal identifier corresponding to the receiving port 1.
  • the network device sends CSI-RS1 through the sending port 1, and the network device can use The transmit beam 1 transmits CSI-RS1 through the transmit port 1, and the terminal device can use the receive beam 1 to receive the CSI-RS1 through the receive port 1. Therefore, a set of optimal paired beams can be determined, namely, transmit beam 1-receive beam 1.
  • the second information sent by the terminal device is also used to indicate N CQIs, where the N CQIs correspond to the N receiving ports one by one, and one of the N CQIs is its corresponding receiving port. CQI measured on the port. Specifically, one CQI among the N CQIs is a CQI obtained by measuring the target downlink reference signal on its corresponding receiving port.
  • the network device may also schedule the terminal device based on the CQI indicated by the second information.
  • the network device may pre-configure a period of time as the measurement period, and the measurement period includes multiple measurement units.
  • the measurement unit in the measurement period can be discrete or continuous. For example, referring to Fig. 6, the measurement period includes 3 consecutive measurement units.
  • the network device can send downlink reference signals through the sending port for multiple measurement units in the measurement period, and the terminal device can also receive the designated downlink reference signal through the designated receiving port in different measurement units, and then send the downlink measurement results of the receiving port Report to the network device.
  • the network device can obtain downlink measurement results corresponding to multiple measurement units, and can determine the best paired beam corresponding to each measurement unit, and can also determine the effective duration of the best paired beam.
  • the measurement unit is an orthogonal frequency division multiplexing (OFDM) symbol in the time domain.
  • the network device sends the downlink reference signal 1 through the sending port 1 at symbol 1, and sends the downlink reference signal 3 through the sending port 3 at symbol 1.
  • the terminal equipment receives and measures the downlink reference signal 1 and the downlink reference signal 3 through the receiving port 1 at symbol 1.
  • the terminal equipment receives and measures the downlink reference signal 1 and the downlink reference signal 3 through the receiving port 2 at symbol 1.
  • the best measurement result on receiving port 1 is downlink reference signal 1, and the best measurement result on receiving port 2 is downlink reference signal 3. Therefore, the best paired beam on symbol 1 is transmit beam1-receive beam1, transmit beam3-receive beam2.
  • the transmit beam corresponding to transmit port 1 is transmit beam 1
  • the transmit beam corresponding to transmit port 3 is transmit beam 3
  • the receive beam corresponding to receive port 1 is receive beam 1
  • the receive beam corresponding to receive port 2 is receive beam 2. .
  • the network device sends the downlink reference signal 2 through the sending port 2 at symbol 3, and sends the downstream reference signal 3 through the sending port 3 at symbol 3.
  • the terminal device receives and measures the downlink reference signal 2 and the downlink reference signal 3 through the receiving port 1 at symbol 3.
  • the terminal device receives and measures the downlink reference signal 2 and the downlink reference signal 3 through the receiving port 2 at symbol 3.
  • the best measurement result on receiving port 1 is downlink reference signal 2
  • the best measurement result on receiving port 2 is downlink reference signal 3. Therefore, the best paired beam on symbol 3 is transmit beam 2-receive beam 1 and transmit beam 3-receive beam 2.
  • the network device can determine when the best paired beam fails according to the effective duration of the best paired beam, and use the new best paired beam to send and receive in time to avoid using the best that has failed. Paired beams reduce the correct reception rate of the signal. For example, in the time interval from symbol 1 to symbol 9 in the time domain, the terminal device moves at a high speed, and uses the best paired beam of transmitting beam 3-receiving beam 2 on symbol 1 to send and receive signals. On symbol 4, The best pairing beam of transmitting beam 3-receiving beam 2 has failed, and the network device needs to re-determine the best pairing beam, and the network device and the terminal device send and receive signals based on the newly determined best pairing beam.
  • the network device may also determine the effective duration of the downlink measurement result in the effective duration of the optimal paired beam. Within the effective duration of the downlink measurement result, the network device may schedule the terminal device according to the downlink measurement result. For example, when the network device determines the best paired beam of transmit beam 3-receive beam 2 on symbol 1, the downlink measurement result is CQI, and on symbol 1 to symbol 3, the network device can use the pair measured on symbol 1 The CQI terminal equipment performs downlink scheduling.
  • the method may further include: the network device sends third information to the terminal device, the third information is used to indicate the second measurement unit, the R sending ports of the terminal device, and The uplink reference signal sent by the terminal device through each of the R sending ports in the second measurement unit, where R is an integer greater than or equal to 1. Based on this information, in the second measurement unit, the terminal device can send the uplink reference signal to the network device through the R sending ports.
  • the embodiments of the present application may be applied to a communication system supporting a time division duplex (TDD) communication standard.
  • the communication system supporting the TDD communication standard has the reciprocity of uplink and downlink (channel reciprocity).
  • the so-called reciprocity means that the uplink channel and the downlink channel have approximately the same channel profile.
  • the best paired beam described in the embodiment of the present application can also be considered as a channel condition.
  • the best paired beam for uplink is also applicable for downlink.
  • the group of best paired beams on the uplink is UE_TX_1-Base_RX_2, that is, when the terminal device uses beam 1 to send a signal, and the network device uses beam 2 to receive the signal, the received energy of the signal is the highest and the interference is the least.
  • the best paired beam UE_TX_1-Base_RX_2 is also applicable to downlink, that is, when the network device uses beam 2 to send signals, and the terminal device uses beam 1 to receive signals, the received energy of the signal is the highest and the interference is the least.
  • an embodiment of the present application also provides a reference signal measurement method. As shown in FIG. 8, the method includes the following steps:
  • the network device sends third information to the terminal device, where the third information is used to indicate the second measurement unit, the R sending ports of the terminal device, and for the terminal device to pass through the R sending ports in the second measurement unit.
  • the second measurement unit is any measurement unit in the second measurement period configured by the network device.
  • the measurement unit can be a unit length in the time domain, for example: the length of a measurement unit can be a positive integer number of symbols, time slots, subframes, etc. in the time domain, or 0.5 milliseconds (millisecond, ms), 1 ms, 5 ms in the time domain Wait for positive milliseconds or positive integer seconds.
  • the second measurement period can be a unit length in the time domain.
  • the length of a measurement unit can be a positive integer number of symbols, time slots, subframes, etc.
  • the length of the first measurement unit and the length of the second measurement unit may be the same or different, and there is no limitation in the embodiment of the present application; the time domain position of the first measurement unit and the time domain position of the second measurement unit may be the same, or Different, the embodiment of this application does not make restrictions;
  • the network device receives the uplink reference signal sent by the terminal device in the time unit T0.
  • the network device may determine multiple receiving ports for receiving uplink reference signals, and receive the uplink reference signals from the terminal device through these receiving ports.
  • the uplink reference signal sent by the terminal device is a sounding reference signal (SRS), or may be another uplink signal that can be used for uplink channel measurement or uplink channel estimation.
  • SRS sounding reference signal
  • the uplink channel state can be obtained by measuring the received uplink reference signal.
  • the network device may configure the terminal device with resources occupied by each uplink reference signal, for example, time domain resources, frequency domain resources, etc. occupied by the uplink reference signal.
  • the terminal device can send the uplink reference signal according to the resource configured by the network device.
  • the resource occupied by the uplink reference signal can also be described as the resource to which the uplink reference signal is mapped.
  • the network device After the network device receives the uplink reference signal from the terminal device, it can learn the best paired beam on the uplink in a specific time unit by measuring the received uplink reference signal.
  • the time unit may be the measurement unit described in step 501, for example, the time unit may be a time domain symbol or a time slot.
  • the measurement result of the uplink reference signal received by the network device through the receiving port 1 in the time unit T0 is the best.
  • the uplink reference signal is sent by the transmitting port 1 of the terminal device. Therefore, the network device can learn that the best paired beam in the time unit T0 is UE_TX_1-Base_RX_1.
  • UE_TX_1 represents the transmission beam 1 of the terminal device sending signals, which can be considered as the transmission beam corresponding to port 1 of the terminal device
  • Base_RX_1 represents the reception beam 1 of the network device receiving signals, which can be considered as the receiving beam corresponding to the port 1 of the network device.
  • the best paired beam on the uplink is also applicable to the downlink, that is, in the time unit T0, the best paired beam on the downlink can be Base_TX_1- UE_RX_1.
  • Base_TX_1 represents the transmission beam 1 of the network device sending signals, which can be considered as the transmission beam corresponding to port 1 of the network device
  • UE_RX_1 represents the receiving beam 1 of the terminal device receiving signals, which can be considered as the receiving beam corresponding to the port 1 of the terminal device.
  • the beam direction of UE_TX_1 is the same as the beam direction of UE_RX_1
  • the beam direction of Base_TX_1 is the same as the beam direction of Base_RX_1.
  • the network device can also learn other best paired beams, for example, Base_TX_2-UE_RX_2.
  • the network device sends first information to the terminal device, where the first information is used to indicate the first measurement unit, the N receiving ports of the terminal device, and the first measurement unit to pass each of the N receiving ports.
  • the received downlink reference signal The received downlink reference signal.
  • the network device sends the first information to the terminal device, which is used to instruct the terminal device to use the receiving port 1 to receive the downlink reference signal in the time unit T1.
  • the first information in step 802 may refer to the first information in step 501.
  • the downlink reference signal may be a CSI-RS or other signals that can be used for downlink measurement, such as cell specific reference signal (CRS), DMRS, synchronization signal, common pilot, etc.
  • CRS cell specific reference signal
  • DMRS DMRS
  • synchronization signal common pilot, etc.
  • the network device configures respective numbers for different downlink reference signals, and the first information may include the identifier of the receiving port, the identifier of the time unit, and the number of the corresponding downlink reference signal.
  • the following reference signal is CSI-RS as an example
  • the first information includes the identifier of the time unit T1, the identifier of the receiving port 1, and the downlink reference signal identifier CSI-RS 1, CSI-RS corresponding to the receiving port 1. 2. That is, the network device instructs the terminal device to receive CSI-RS 1 and CSI-RS 2 through the receiving port 1 in the time unit T1 through the first information.
  • step 803 is only taking receiving port 1 as an example.
  • the network device may also configure other receiving ports (one or more receiving ports) of the terminal device to receive the downlink reference signal at time unit T1. This is the case in this application. No restrictions.
  • the network device sends a downlink reference signal to the terminal device in the time unit T1.
  • the network device sends CSI-RS with reference to certain rules, that is, sends the corresponding CSI-RS through the specified transmission port in the specified time unit.
  • the network device is configured with the time unit in which the downlink reference signal is sent.
  • the downlink reference signal has a one-to-one correspondence with the transmission port of the network device, and the transmission port of the network device is used to transmit the downlink reference signal corresponding to the transmission port.
  • the following reference signal is CSI-RS as an example. It is assumed that CSI-RS1 corresponds to the transmission port 1 of the network device, and CSI-RS2 corresponds to the transmission port 2 of the network device.
  • the network device may send CSI-RS1 through transmission port 1 and CSI-RS2 through transmission port 2 in time unit T1.
  • the terminal device sends second information to the network device, where the second information is used to indicate the downlink measurement result of the first measurement unit.
  • the terminal device sends the second information to the network device, and reports the downlink measurement result of the receiving port 1.
  • the terminal device After receiving the first information sent by the network device in step 803, the terminal device can determine which receiving ports receive which downlink reference signals in which time units. Further, after the terminal device uses the designated receiving port to receive the corresponding downlink reference signal in the designated time unit, the terminal device can also measure the received downlink reference signal to obtain the downlink measurement result of the receiving port. In addition, the terminal device can also report the downlink measurement result to the network device. It should be noted that this embodiment of the application does not limit the time for the terminal device to measure the downlink reference signal.
  • the received downlink reference signal can be measured in the time unit of receiving the downlink reference signal, or it can be measured in the time unit of receiving the downlink reference signal. After that, the downlink reference signal is measured.
  • the second information in step 804 may refer to the second information in step 502.
  • the following reference signal is CSI-RS as an example.
  • the downlink measurement result reported by the terminal device may specifically include the identifier of the CSI-RS with the best measurement result on the receiving port number, where the CSI-RS with the best measurement result may be the measurement.
  • the terminal device receives CSI-RS1 and CSI-RS2 through receiving port 1 in time unit T1. Among them, the CQI obtained by measuring CSI-RS 1 is the largest.
  • the second information sent by the terminal device may include the downlink measurement result of the receiving port 1.
  • the downlink measurement result of the receiving port 1 may include the identifier of the time unit T1, the identifier of the receiving port 1, and the identifier of the CSI-RS with the best measurement result on the receiving port 1, such as the identifier of CSI-RS1.
  • the network device receives the second information sent by the terminal device.
  • the network device may determine the best paired beam in the time unit T1 according to the second information.
  • the effective duration of the best paired beams can be determined according to the interval between these two time units.
  • the best paired beam in the time unit T0 and the best paired beam in the time unit T1 may represent similar channel conditions, and it can be considered that the effective duration of the best paired beam in the time unit T0 is
  • the terminal device is in a static state, and the transmit beams in the two sets of best paired beams on the downlink are the same, and the receive beams are also the same, it is considered that the two sets of best paired beams are the same, which represents Similar channel conditions.
  • the interval between the two time units can be determined to be the effective duration of the best paired beam. For example, in the time unit T1, the network device sends the CSI-RS 1 through the sending port 1 and sends the CSI-RS 2 through the sending port 2.
  • the receiving port 1 of the terminal device receives CSI-RS 1 and CSI-RS 2. Among them, the measurement result obtained by measuring CSI-RS 1 is the best. Then, the best paired beam in the time unit T1 is Base_TX_1-UE_RX_1. In addition, step 801 determines that the best paired beam in the time unit T0 is Base_TX_1-UE_RX_1. Therefore, it can be determined that the effective duration of the best paired beam is still Base_TX_1-UE_RX_1
  • the terminal device When the terminal device is in a static state, the terminal device will not move, and the channel condition of the receiving port 1 in the time unit T0 is similar to the channel condition of the receiving port 1 in the time unit T1.
  • the downlink measurement result of the receiving port 1 in the time unit T0 can be used to predict the downlink measurement result of the receiving port 1 in the time unit T1.
  • the terminal device is in a moving state, and the transmit beams in the two sets of best paired beams on the downlink are the same, but the receive beams are different. It can be considered that within a period of time, the two receive beams Have similar channel conditions. Further, if the transmit beams in the optimal paired beams of two time units are the same but the receive beams are different, it can also be considered that the optimal paired beams in the interval between the two time units are relatively stable, and the interval between the two time units is determined to be The effective duration of the best paired beam.
  • the terminal device is a vehicle as an example.
  • antenna 1 and antenna 2 there are two antennas on the vehicle, antenna 1 and antenna 2.
  • antenna 1 is distributed at the front of the vehicle
  • antenna 2 is distributed at the rear of the vehicle
  • the angle between antenna 1 and antenna 2 and the horizontal is the same, both being 30 degrees.
  • antenna 1 is the receiving port 1 of the terminal device
  • antenna 2 is the receiving port 2 of the terminal.
  • the front of the vehicle passes point A, and the network device receives the uplink reference signal sent by antenna 1 and antenna 2.
  • the network device measures the received uplink reference signal and finds that the measurement result of the uplink reference signal sent by antenna 1 is the best.
  • the network device receives the uplink reference signal sent by antenna 1 through Base_RX_1, it can then be determined that in the time unit T0, there is the best paired beam Base_RX_1-UE_TX_1 on the uplink. Further, due to the uplink reciprocity, the best paired beam Base_TX_1-UE_RX_1 exists on the downlink in the time unit T0.
  • the vehicle continues to drive.
  • the rear of the vehicle passes point A.
  • the network device sends CSI-RS 1 through sending port 1, CSI-RS 2 through sending port 2, and antenna 2 receives CSI-RS 1 and CSI sent by the network device. -RS 2.
  • the best measurement result on antenna 2 is CSI-RS 1. Since the transmitting beam corresponding to the transmitting port 1 is Base_RX_1 and the receiving beam corresponding to the antenna 2 is UE_RX_2, it can be determined that the best paired beam Base_TX_1-UE_RX_2 exists on the downlink in the time unit T1.
  • the relative direction angle between the terminal device and the base station affects the channel condition between the terminal device and the base station.
  • the relative direction angles of the antenna 1 and the antenna 2 with respect to the base station are different. Therefore, the channel conditions between the antenna 1, the antenna 2 and the base station are also different.
  • the relative direction angle of antenna 2 to the base station is the same as the relative direction angle of antenna 1 to the base station when the head of the car passes point A. That is to say, when the head of the car passes point B, the antenna 2 and the base station The channel conditions are similar to the channel conditions between antenna 1 and the base station when the front of the car passes through point A.
  • the best paired beam can represent channel conditions, it can be considered that the channel conditions represented by the best paired beams Base_TX_1-UE_RX_1 and Base_TX_1-UE_RX_2 are similar. Then, it can be considered that the effective duration of the best paired beam Base_TX_1-UE_RX_1 in the time unit T0 can be
  • the channel condition of the receiving port 1 in the time unit T0 is similar to the channel condition of the receiving port 2 in the time unit T1.
  • the downlink measurement result of the receiving port 1 in the time unit T0 can be used to predict the downlink measurement result of the receiving port 2 in the time unit T1.
  • the network device may also schedule the terminal device according to the effective duration of the best paired beam.
  • the network device can predict the channel conditions within the effective time. For example, in the time unit T2, the channel conditions of the time unit (T2+
  • ) can be determined according to the predicted result, for example, the transmission beam direction of the network equipment time unit (T2+
  • the network equipment can know the best paired beam (ie, network) on the downlink in the first time unit (such as time unit T0) through SRS.
  • the network device can also instruct the terminal device to receive the designated downlink reference signal through the designated receiving port in the second time unit (e.g., time unit T1), and report the downlink measurement result on the port to the network device, and the network device returns
  • the best paired beam on the downlink in the second time unit may be determined according to the downlink measurement result reported by the terminal device.
  • the network device can also determine the effective duration of the best paired beam, that is, the interval between the first time unit and the second time unit.
  • the network device uses the transmitting beam of the best paired beam to send signals within the effective time of the best paired beam, and the terminal device uses the receiving beam in the best pairing to receive signals so that the signal The received energy is the highest and the interference is the least. It is also possible to use the best paired beam to perform channel prediction within the effective duration of the best paired beam, and perform efficient scheduling on terminal devices. After the best paired beam fails, the best paired beam is re-determined to avoid using the best paired beam that has failed to send and receive signals, and to avoid the problem that the failure of the best paired beam causes the correct signal reception rate to decrease.
  • the embodiment of the present application also provides a reference signal measurement method, which is suitable for a communication system supporting the FDD communication standard. As shown in Figure 10, the method specifically includes the following steps:
  • a network device sends a downlink reference signal to a terminal device.
  • the network device can indicate the period and offset of the downlink reference signal for the terminal device.
  • the period is used to indicate the number of time units included in one period for sending the downlink reference signal
  • the offset is used to indicate the time unit used for sending the downlink reference signal in one period.
  • the period and/or offset of the downlink reference signal can be pre-configured.
  • the network device may send the downlink reference signal to the terminal device within a period of time according to the period and offset of the downlink reference signal.
  • This period of time may be pre-configured or indicated by the network device for the terminal device.
  • the transmission period of the first downlink reference signal is 2, and the offset is 0.
  • the pre-configured time length of the network device is one time slot, and the time unit is a symbol, that is, the network device is in a time slot, every 2
  • the symbol transmits the first downlink reference signal once.
  • a time slot includes 6 symbols, which are symbol 0, symbol 1...symbol 5, and the network device sends the first downlink reference signal at symbol 0, symbol 2, and symbol 4.
  • the network device may send multiple different downlink reference signals, such as the first downlink reference signal, the second downlink reference signal, etc., within the aforementioned pre-configured time period.
  • the periods configured for different downlink reference signals are the same or different, and the offsets corresponding to different downlink reference signals are the same or different.
  • the period of sending the first downlink reference signal and the period of sending the second downlink reference signal may be the same or different.
  • the offset corresponding to the first downlink reference signal and the offset corresponding to the second downlink reference signal may be the same or different.
  • the downlink measurement result may be the result obtained by the terminal device measuring the downlink reference signal sent by the network device.
  • the downlink measurement result may include the signal received energy obtained by the terminal device measuring the downlink reference signal.
  • the received energy of the downlink reference signal can be characterized by parameters such as CQI, RSRP, and SINR.
  • the downlink measurement result includes the maximum CQI obtained by the terminal device by measuring the downlink reference signal.
  • the terminal device can report the downlink measurement result to the network device.
  • the signaling type for reporting the downlink measurement result and the signaling type for reporting the effective duration of the downlink measurement result may be the same or different, which is not limited in the embodiment of the present application.
  • the time unit for reporting the downlink measurement result and the time unit for reporting the effective duration of the downlink measurement result may be the same or different, and there is no limitation in the embodiment of the present application.
  • the downlink measurement result of the first receiving port of the terminal device in the first time unit is related to the downlink measurement result of the second receiving port of the terminal device in the second time unit
  • the downlink measurement result of the first time unit can be considered
  • the effective duration of is the interval between the first time unit and the second time unit. It is understandable that when the terminal device reports a downlink measurement result (for example, CQI) to the network device, the downlink reference signal corresponding to the CQI is received by the terminal device through the first receiving port in the first time unit.
  • a downlink measurement result for example, CQI
  • the CQI is used to determine the scheduling information of the scheduling terminal device, and the data channel is sent to the terminal device according to the scheduling information, and the terminal device can use the second The receiving port receives the data channel.
  • the first receiving port and the second receiving port may be the same or different.
  • the time unit described in the embodiment of the present application may be a unit length in the time domain.
  • the length of a measurement unit may be a positive integer number of symbols, time slots, subframes, etc. in the time domain, or 0.5 milliseconds (millisecond, ms) in the time domain. ), 1ms, 5ms, etc. positive milliseconds or positive integer seconds.
  • the positive integer may be an integer greater than or equal to 1, for example, an integer of 1, 2, 3 or greater.
  • the terminal device can determine whether the downlink measurement results of different time units are relevant in the following two ways:
  • the first type is to judge whether the downlink measurement results of different time units are relevant according to the signal received energy corresponding to the downlink measurement result.
  • the terminal device determines the valid duration of the downlink measurement result according to the correlation threshold.
  • the correlation threshold may be pre-configured, or the network device may configure the terminal device through signaling.
  • the correlation between the maximum signal receiving energy obtained by the terminal device in the first time unit and the maximum signal receiving energy obtained by the terminal device in the second time unit is greater than or equal to the correlation threshold, or the terminal device is in the first time unit
  • the deviation between the maximum signal receiving energy obtained by the time unit measurement and the maximum signal receiving energy obtained by the terminal device in the second time unit is less than or equal to the deviation threshold
  • the downlink measurement result of the terminal device in the first time unit is considered to be
  • the downlink measurement result of the terminal device in the second time unit is correlated, that is, the effective duration of the downlink measurement result obtained by the terminal device in the first time unit is considered to be the interval between the first time unit and the second time unit.
  • the relevance threshold is 90%, 99%, or other values.
  • the maximum CQI obtained by the terminal device measuring the downlink reference signal in the time unit T0 is 9, and the maximum CQI obtained by the terminal device measuring the downlink reference signal in the time unit T1 is 10, and the correlation between the CQI value 9 and the CQI value 10 is 90% , Equal to the above-mentioned correlation threshold, it is considered that the effective duration of the CQI obtained by the terminal equipment in the time unit T0 is
  • the terminal device determines the valid duration of the downlink measurement result according to the deviation threshold.
  • the deviation threshold and the correlation threshold may be pre-configured, or may be configured by the network device for the terminal device through signaling.
  • the deviation threshold may also be pre-configured, or the network device may configure the terminal device through signaling, for example, the deviation threshold is 1%, 10% or other values.
  • the CQI value measured by the terminal device in the time unit T0 is 10, allowing a 10% deviation. That is, if the CQI value measured by the terminal device in the time unit T1 is between 9 and 11, the terminal is considered The measurement result of the device in time unit T0 is still valid in time unit T1.
  • the second method is to judge whether the downlink measurement results of different time units are relevant according to the channel matrix indicated by the downlink measurement result.
  • the terminal device determines the effective duration of the downlink measurement result according to the channel matrix correlation threshold.
  • the channel matrix correlation threshold may be pre-configured, or may be configured by the network device for the terminal device through signaling.
  • the terminal device determines the valid duration of the downlink measurement result according to the channel matrix deviation threshold.
  • the channel matrix deviation threshold may be pre-configured, or may be configured by the network device for the terminal device through signaling.
  • the terminal device in the first time unit if the correlation between the channel matrix indicated by the downlink measurement result of the terminal device in the first time unit and the channel matrix indicated by the downlink measurement result of the terminal device in the second time unit is greater than or equal to the correlation threshold, or, The deviation between the channel matrix indicated by the downlink measurement result of the terminal device in the first time unit and the channel matrix indicated by the downlink measurement result of the terminal device in the second time unit is less than or equal to the deviation threshold, then the terminal device is considered to be in the first time unit.
  • the measurement result of one time unit is correlated with the measurement result of the terminal device in the second time unit, that is, the effective duration of the downlink measurement result obtained by the terminal device in the first time unit is considered to be between the first time unit and the second time unit. The interval between.
  • the deviation or correlation between the channel matrices can be determined by comparing the characteristic information of the channel matrices.
  • the characteristic information of the channel matrix may be the maximum characteristic value of the channel matrix, or the determinant of the channel matrix.
  • the channel matrix indicated by the downlink measurement result of the terminal device in time unit T0 is matrix A
  • the channel matrix indicated by the downlink measurement result of the terminal device in time unit T1 Is matrix B.
  • the maximum eigenvalue of matrix A is 10. If the maximum eigenvalue of matrix B is any value from 9 to 11, it is considered that the deviation between matrix A and matrix B is less than 10%, and the correlation is greater than 90%, then it can be determined that the terminal device is in
  • the downlink measurement result of the time unit T0 is related to the downlink measurement result of the terminal device in the time unit T1, and the effective duration of the CQI obtained by the terminal device in the time unit T0 is
  • the terminal device when the terminal device reports the effective duration, it may report the time unit included in the effective duration.
  • the effective duration includes X time units, and X is a value greater than or equal to 1.
  • the starting time of the effective duration may be the time unit of the effective duration of the terminal device reporting the downlink measurement result, or the time unit of the terminal device reporting the downlink measurement result, or the time unit of the terminal device obtaining the downlink measurement result.
  • the CQI value obtained by the terminal device by measuring the downlink reference signal at the nth symbol is 9, and the effective duration of the CQI is X symbols.
  • the CQI is valid within X symbols after the nth symbol.
  • the valid duration of the downlink measurement result may be represented by a bit sequence of length Q.
  • the terminal device can carry the effective duration of the downlink measurement result in physical layer signaling, for example, physical uplink control channel (PUCCH) or physical uplink control channel (PUSCH) .
  • the valid duration of the downlink measurement result can also be carried on the RRC signaling.
  • the effective duration of the downlink measurement results please refer to the reporting of Uplink control information in protocol 38.212.
  • the terminal device may periodically report the signaling carrying the effective duration according to the configuration of the network device. If the physical layer signaling bears the effective duration, the time unit for reporting the effective duration can be notified through downlink physical layer signaling. For example, on the downlink physical layer signaling that the network device informs the terminal device to send the CSI-RS, the terminal device is informed in which time unit the effective duration is reported to the network device.
  • the method shown in FIG. 10 further includes: the network device receives fourth information sent by the terminal device, where the fourth information is used to indicate that the terminal device has a function of determining the effective duration of the downlink measurement result.
  • the terminal device may send fourth information to the network device, indicating whether the terminal device has the ability to determine the effective duration of the downlink measurement result. Further, the network device may send a downlink reference signal to the terminal device, so that the terminal device receives and measures the downlink reference signal, and reports the effective duration of the downlink measurement result to the network device.
  • the terminal device may report its own capability information to the network device through the fourth information.
  • the network device may also instruct the terminal device to turn on or turn off this function. In this way, it can be better compatible with the existing terminal equipment that does not support this function, and the applicability of the method provided in this application is greatly improved.
  • the method shown in FIG. 10 further includes: the network device sends fifth information to the terminal device, the fifth information is used to enable the terminal device to determine the valid duration of the downlink measurement result, that is, the fifth information is used to instruct the terminal device to start reporting Effective time function.
  • the five information may be used to instruct the terminal device to turn off the function of reporting the effective duration.
  • the method shown in FIG. 10 further includes: the network device sends sixth information to the terminal device, where the sixth information is used to indicate the above-mentioned correlation threshold or deviation threshold.
  • the network device may send the fifth information and the sixth information to the terminal device through a single signaling, or may send the fifth information and the sixth information through two signalings respectively, which is not limited in the embodiment of the present application.
  • the method shown in FIG. 10 further includes: the network device schedules the terminal device according to the valid duration of the downlink measurement result.
  • the network device can predict the channel conditions within the effective time. For example, suppose that the network device obtains the downlink measurement result (for example: CQI) in the time unit T2, and the content reported by the terminal device in step 1002 indicates that the effective duration of the downlink measurement result is ⁇ T.
  • the network device may predict the channel condition in the time unit (T2+ ⁇ T) according to the channel condition of the time unit T2, for example, determine the scheduling information of the time unit (T2+ ⁇ T) according to the scheduling information of the time unit T2.
  • the scheduling information may be the transmitting beam direction of the network device, the receiving beam direction of the terminal device, the size of the scheduled data packet, the time-frequency resource of the data packet, the modulation method, the code rate, and so on.
  • the network device can continuously send the same downlink reference signal, so that the terminal device continuously measures the downlink channel to obtain the downlink measurement result, and further can determine the effective duration of the downlink measurement result.
  • the terminal device reports the effective duration of the downlink measurement result to the network device, and the network device can determine the scheduling information of the terminal device according to the downlink measurement result within the effective duration of the downlink measurement result, so as to realize efficient scheduling of the terminal device and help reduce interference. Improve the transmission performance of the communication system.
  • the network device can continuously send downlink reference signals to the terminal device, and the terminal device can measure the received downlink reference signal, and report the measurement result and the effective duration of the measurement result to the network device. Furthermore, the network device can determine the effective duration of the best paired beam according to the effective duration of the measurement result. In a scenario where the terminal device is in high-speed motion, the network device uses the transmitting beam of the best paired beam to send signals within the effective time of the best paired beam, and the terminal device uses the receiving beam in the best pairing to receive signals so that the signal The received energy is the highest and the interference is the least.
  • the best paired beam it is also possible to use the best paired beam to perform channel prediction within the effective duration of the best paired beam, and perform efficient scheduling on terminal devices. After the best paired beam fails, the best paired beam is re-determined to avoid using the best paired beam that has failed to send and receive signals, and to avoid the problem that the failure of the best paired beam causes the correct signal reception rate to decrease.
  • the methods provided in the embodiments of the present application are respectively introduced from the perspective of network equipment, terminal equipment, and interaction between the network equipment and the terminal equipment.
  • the network device and the terminal device may include a hardware structure and/or software module, and the above functions are implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module . Whether one of the above-mentioned functions is executed in a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • FIG. 11 shows a schematic diagram of a possible structure of the communication device involved in the foregoing embodiment.
  • the communication device shown in FIG. 11 may be the network device described in the embodiment of the present application, may also be a component in the network device that implements the foregoing method, or may also be a chip applied to the network device. Among them, the chip may be a system on a chip (SOC) or a baseband chip with communication functions.
  • the communication device includes a processing unit 1101 and a communication unit 1102.
  • the processing unit may be one or more processors, and the communication unit may be a transceiver.
  • the processing unit 1101 is configured to support the communication device to generate the first information, and/or other processes used in the technology described herein.
  • the communication unit 1102 is used to support the communication between the communication device and other communication devices, such as supporting the communication device to perform steps 501, 502, steps 801 to 805 in the above-mentioned embodiment, and the network equipment in steps 1001 to 1002 Functions, and/or other processes used in the techniques described herein.
  • the processing unit 1101 can use the communication unit 1102 to send and receive information.
  • FIG. 12 shows a schematic diagram of a possible structure of the communication device involved in the foregoing embodiment.
  • the communication device shown in FIG. 12 may be the terminal device described in the embodiments of the present application, may also be a component in the terminal device that implements the foregoing method, or may also be a chip applied to the terminal device. Among them, the chip may be a system on a chip (SOC) or a baseband chip with communication functions.
  • the communication device includes a processing unit 1201 and a communication unit 1202.
  • the processing unit may be one or more processors, and the communication unit may be a transceiver.
  • the processing unit 1201 is used to support the communication device to generate the second information, and/or used in other processes of the technology described herein.
  • the communication unit 1202 is used to support communication between the communication device and other communication devices, such as supporting the communication device to perform steps 501, 502, steps 801 to 804 in the above-mentioned embodiment, and functions of the terminal equipment in steps 1001 to 1002 , And/or other processes used in the techniques described herein.
  • the processing unit 1201 can use the communication unit 1202 to send and receive information.
  • the division of modules in the embodiments of the present application is illustrative, and is only a logical function division. In actual implementation, there may be other division methods.
  • the functional modules in the various embodiments of the present application may be integrated into one process. In the device, it can also exist alone physically, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules.
  • the methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented by software, it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a dedicated computer, a computer network, network equipment, user equipment, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a digital video disc (digital video disc, DVD for short)), or a semiconductor medium (for example, SSD).
  • the embodiments can be mutually cited.
  • methods and/or terms between method embodiments can be mutually cited, such as functions and/or functions between device embodiments.
  • Or terms may refer to each other, for example, functions and/or terms between the device embodiment and the method embodiment may refer to each other.

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

Abstract

L'invention concerne, selon des modes de réalisation, le domaine des communications. L'invention concerne un procédé de mesure de signal de référence et un appareil de communication, pour résoudre le problème d'un taux de réception correct réduit de signaux provoqué par un faisceau apparié optimal invalide dans une scène de mouvement à grande vitesse. Le procédé consiste à : envoyer des premières informations à un dispositif de terminal, les premières informations étant utilisées pour indiquer une première unité de mesure, N ports de réception du dispositif de terminal et un signal de référence de liaison descendante reçu par le dispositif de terminal au moyen de chaque port des N ports de réception au niveau de la première unité de mesure, N étant un nombre entier supérieur ou égal à 1 ; et recevoir des secondes informations en provenance du dispositif de terminal, les secondes informations étant utilisées pour indiquer un résultat de mesure de liaison descendante de la première unité de mesure.
PCT/CN2020/077936 2019-03-13 2020-03-05 Procédé de mesure de signal de référence et appareil de communication WO2020182046A1 (fr)

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