CN111698715A

CN111698715A - Reference signal measuring method and communication device

Info

Publication number: CN111698715A
Application number: CN201910188261.3A
Authority: CN
Inventors: 张鹏; 汪凡
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-03-13
Filing date: 2019-03-13
Publication date: 2020-09-22
Also published as: WO2020182046A1

Abstract

The embodiment of the application discloses a reference signal measuring method and a communication device, relates to the field of communication, and can solve the problem that the correct receiving rate of signals is reduced due to failure of an optimal pairing wave beam in a high-speed motion scene. The method comprises the following steps: sending first information to a terminal device, where the first information is used to indicate a first measurement unit, N receiving ports of the terminal device, and a downlink reference signal received by the terminal device through each of the N receiving ports in the first measurement unit, where N is an integer greater than or equal to 1; and receiving second information from the terminal equipment, wherein the second information is used for indicating a downlink measurement result of the first measurement unit.

Description

Reference signal measuring method and communication device

Technical Field

The embodiment of the application relates to the field of communication, in particular to a reference signal measuring method and a communication device.

Background

The multi-antenna technology is widely applied to communication systems such as Long Term Evolution (LTE), new air interface (NR), and the like. In the multi-antenna technique, a transmitting end may transmit a signal to a receiving end using a plurality of transmit beams, and the receiving end may also receive a signal using a plurality of receive beams. In order to fully exploit the advantages of multiple antennas, optimal paired beams are used for transmission and reception. The best paired beam is a signal transmitted by a transmitting beam in the best paired beam, and the energy of a received signal obtained when the signal is received by a receiving beam in the best paired beam is higher than that obtained when the signal is transmitted by other transmitting and receiving beams.

Taking a base station and a User Equipment (UE) for data transmission as an example, when the base station determines the best pairing beam, the base station may perform data scheduling on the UE by using the best pairing beam. For example, the base station transmits signals using a transmit beam in the best paired beam, and the UE receives signals using a receive beam in the best paired beam. The best matching beam is related to the relative position between the base station and the UE, and if the UE is in a high-speed motion state, the position of the UE during actual scheduling has a larger deviation than the position of the UE during previous measurement of the best matching beam, the channel condition between the UE and the base station may change, and the best matching beam may fail. Since the previous best paired beam does not match the current channel condition between the UE and the base station, if the base station still schedules the UE based on the previous best paired beam, the correct reception rate of the signal is reduced, thereby reducing the transmission performance of the communication system.

Disclosure of Invention

The embodiment of the application provides a reference signal measuring method and a communication device, a base station can acquire a channel state at a specific time, and further establishes a corresponding relation between an optimal pairing beam and the time, so that the problem that the transmission performance of a communication system is reduced due to the failure of the optimal pairing beam in a high-speed motion scene is solved.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, a method for measuring a reference signal is disclosed, which includes: sending first information to a terminal device, where the first information is used to indicate a first measurement unit, N reception ports of the terminal device, and a downlink reference signal used for the terminal device to receive at the first measurement unit through each of the N reception ports, where N is an integer greater than or equal to 1. The method further comprises receiving second information from the terminal device, the second information being used for indicating a downlink measurement result of the first measurement unit.

In the method provided by the embodiment of the present application, the network device may instruct the terminal device to receive and measure the downlink reference signal through a specific port at a specific time (e.g., the measurement unit in the embodiment of the present application) through the first information, and the terminal device may also report the measurement result to the network device through the second information. Further, the network device may determine, according to the measurement result, the receiving port with the highest received signal energy at a specific time and the corresponding transmitting port, that is, may determine the best paired beam at the specific time. Further, the network device may determine a period of time for which the best paired beam remains unchanged, i.e., an effective duration of the best paired beam. Under the scene that the terminal equipment moves at a high speed, the network equipment uses the transmitting wave beam of the optimal matched wave beam to transmit signals within the effective duration of the optimal matched wave beam, and the terminal equipment uses the receiving wave beam of the optimal matched wave beam to receive the signals, so that the receiving energy of the signals is highest, and the interference is minimum. After the best paired beam fails, the best paired beam can be determined again, so that the problem that the transmission performance of the communication system is reduced due to the failure of the best paired beam is avoided by using the failed best paired beam to transmit and receive signals.

In one possible implementation, the method further includes: receiving port capability information from the terminal device, the port capability information being used to indicate Q port groups of the terminal device, each of the Q port groups including one or more ports; the ports in each port group support simultaneous receiving and/or sending, time division receiving and/or sending is supported among different port groups, and Q is an integer greater than or equal to 1.

In this embodiment, the network device may determine, according to the port capability information reported by the terminal device, receiving ports capable of receiving the downlink reference signal at the same time, and the configured first information may indicate that the receiving ports receive the downlink reference signal at the first measurement unit. Or, the network device may determine that the downlink reference signals cannot be received simultaneously according to the port capability information reported by the terminal device, and the configured first information does not indicate that the receiving ports receive the downlink reference signals in the first measurement unit. The port characteristics of the terminal equipment are fully considered, and the receiving port of the terminal equipment can be reasonably configured.

In one possible implementation, the method further includes: and sending M downlink reference signals to the terminal equipment through M sending ports in the first measurement unit, wherein the M downlink reference signals correspond to the M sending ports one to one, and M is an integer greater than or equal to 1.

In the embodiment of the application, the network device configures downlink reference signals and the sending ports in a one-to-one correspondence manner, after the downlink measurement result of the terminal device is obtained and reported to the network device, the network device can correspond to one sending port according to the downlink reference signal identifier in the downlink measurement result, and a group of optimal paired beams can be determined by further combining the receiving port of the downlink reference signal.

In a possible implementation manner, 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 to one, and one target downlink reference signal identifier of the N target downlink reference signal identifiers is an identifier of a target downlink reference signal with an optimal measurement result on the corresponding receiving port.

In this embodiment, the downlink measurement result reported by the terminal device may be a downlink reference signal with an optimal measurement result on the receiving port, and further, the network device may determine a group of optimal pairing beams by combining the transmitting port corresponding to the downlink reference signal with the optimal measurement result. After the best paired beam fails, the best paired beam can be determined again, so that the problem that the transmission performance of the communication system is reduced due to the failure of the best paired beam is avoided by using the failed best paired beam to transmit and receive signals.

In a possible implementation manner, the second information is further used to indicate N channel quality indicators, the N CQIs correspond to the N receiving ports one by one, and one of the N CQIs is a CQI measured on its corresponding receiving port.

In the embodiment of the present application, when the terminal device reports the measurement result on the receiving port, the CQI measured on the receiving port may also be reported, and further, the network device may also schedule the terminal device according to the CQI reported by the terminal device within the effective duration of the best paired beam.

In a second aspect, a reference signal measurement method is disclosed, which includes:

receiving first information from a network device, wherein the first information is used for indicating a first measurement unit, N receiving ports of a terminal device and a downlink reference signal received by the terminal device through each port of the N receiving ports in the first measurement unit, and N is an integer greater than or equal to 1; and sending second information to the network equipment, wherein the second information is used for indicating the downlink measurement result of the first measurement unit.

In one possible implementation, the method further includes: sending and receiving port capability information to the network equipment, wherein the port capability information is used for indicating Q port groups of the terminal equipment, and each port group in the Q port groups comprises one or more ports; the ports in each port group support simultaneous receiving and/or sending, time division receiving and/or sending is supported among different port groups, and Q is an integer greater than or equal to 1.

In one possible implementation, the method further includes: receiving M downlink reference signals from a network device through N receive ports in a first measurement unit; wherein M is an integer of 1 or more.

In a third aspect, a communication apparatus is disclosed, which may be a network device, an apparatus in a network device, or an apparatus capable of being used in cooperation with a network device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the first aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one possible implementation, the apparatus includes: a communication unit, configured to send first information to a terminal device, where the first information is used to indicate a first measurement unit, N receiving ports of the terminal device, and a downlink reference signal used for the terminal device to receive at 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 further configured to receive second information from the terminal device, where the second information is used to indicate a downlink measurement result of the first measurement unit. The communication apparatus may further include a processing unit, which may be configured to generate the first information, and transmit the first information to a terminal device using the communication unit. The processing unit may also receive second information from the terminal device using the communication unit and process the second information, for example, determine a downlink measurement result of the first measurement unit according to the second information.

In a possible implementation manner, the communication unit is further configured to receive 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 receiving and/or sending, time division receiving and/or sending is supported among different port groups, and Q is an integer greater than or equal to 1.

In a possible implementation manner, the communication unit is further configured to send, in the first measurement unit, M downlink reference signals to the terminal device through M sending ports, where the M downlink reference signals and the M sending ports are in one-to-one correspondence, and M is an integer greater than or equal to 1.

In a fourth aspect, a communication apparatus is disclosed, which may be a terminal device, an apparatus in a terminal device, or an apparatus capable of being used in cooperation with a terminal device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the second aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one possible implementation, the apparatus includes:

a communication unit, configured to receive first information from a network device, where the first information is used to indicate a first measurement unit, N receiving ports of a terminal device, and a downlink reference signal used for the terminal device to receive at 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 further configured to send second information to the network device, where the second information is used to indicate a downlink measurement result of the first measurement unit. The communication apparatus may further include a processing unit that may be configured to generate the second information, and transmit the second information to a network device using the communication unit. The processing unit may also receive first information from the terminal device using the communication unit and process the first information.

In a possible implementation manner, the communication unit is further configured to send and receive port capability information to the network 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 receiving and/or sending, time division receiving and/or sending is supported among different port groups, and Q is an integer greater than or equal to 1.

In a possible implementation manner, the communication unit is further configured to receive, in the first measurement unit, M downlink reference signals from the network device through the N receiving ports; wherein M is an integer of 1 or more.

In a fifth aspect, a communication device is disclosed, which comprises at least one processor configured to implement the method described in the first aspect and possible implementations. The communication device may further comprise a memory coupled to the at least one processor, the at least one processor being configured to implement the method described in the first aspect and possible implementations above. Illustratively, the memory is configured to store instructions, and the processor may call and execute the instructions stored in the memory, so as to implement the method described in the above first aspect and possible implementations. The communication device may further comprise a communication interface for the communication device to communicate with other devices. Illustratively, 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 may be in an electrical, mechanical or other form, and is used for information interaction between the devices, units or modules.

In one possible implementation, the communication apparatus includes at least one processor and a communication interface, where the at least one processor sends, to a terminal device, first information, where the first information is used to indicate a first measurement unit, N reception ports of the terminal device, and a downlink reference signal used for the terminal device to receive at the first measurement unit through each of the N reception ports, where N is an integer greater than or equal to 1; the at least one processor further receives second information from the terminal device using the communication interface, the second information indicating a downlink measurement result of the first measurement unit.

In one possible implementation, the at least one processor further receives port capability information from the terminal device using the communication interface, the port capability information indicating Q port groups of the terminal device, each of the Q port groups including one or more ports; the ports in each port group support simultaneous receiving and/or sending, time division receiving and/or sending is supported among different port groups, and Q is an integer greater than or equal to 1.

In one possible implementation, the at least one processor further uses the communication interface to send M downlink reference signals to the terminal device through M sending ports in the first measurement unit, where the M downlink reference signals and the M sending ports are in one-to-one correspondence, and M is an integer greater than or equal to 1.

In one possible implementation, 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 one target downlink reference signal identifier of the N target downlink reference signal identifiers is an identifier of a target downlink reference signal with a best measurement result on its corresponding receiving port.

In one possible implementation, the second information is further used to indicate N channel quality indicators, the N CQIs corresponding to the N receiving ports one-to-one, and one of the N CQIs is a CQI measured on its corresponding receiving port.

In a sixth aspect, a communication device is disclosed, which comprises at least one processor configured to implement the method described in the second aspect and possible implementations. The communication device may further comprise a memory coupled to the at least one processor, the at least one processor being configured to implement the method described in the second aspect and possible implementations above. The memory is used for storing instructions, and the processor may call and execute the instructions stored in the memory, so as to implement the method described in the second aspect and possible implementation manners. The communication device may further comprise a communication interface for the communication device to communicate with other devices. Illustratively, the other device is a network device.

In one possible implementation, the communications apparatus includes: the system comprises at least one processor and a communication interface, wherein the at least one processor receives first information from a network device by using the communication interface, the first information is used for indicating a first measurement unit, N receiving ports of a terminal device and a downlink reference signal received by the terminal device through each of the N receiving ports in the first measurement unit, and N is an integer greater than or equal to 1; the at least one processor further sends second information to the network device by using the communication interface, where the second information is used to indicate a downlink measurement result of the first measurement unit.

In one possible implementation, the at least one processor further sends, to the network device, receiving port capability information, 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 receiving and/or sending, time division receiving and/or sending is supported among different port groups, and Q is an integer greater than or equal to 1.

In one possible implementation, the at least one processor further receives, using the communication interface, M downlink reference signals from the network device through N receive ports in the first measurement unit; wherein M is an integer of 1 or more.

In a seventh aspect, this embodiment of the present application further provides a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform the reference signal measurement method according to the first aspect and/or any one of the implementations of the first aspect, or cause the computer to perform the reference signal measurement method according to the second aspect and/or any one of the implementations of the second aspect.

In an eighth aspect, this embodiment further provides a computer program product, which includes instructions that, when executed on a computer, cause the computer to perform the reference signal measurement method according to the first aspect and/or any one of the implementations of the first aspect, or cause the computer to perform the reference signal measurement method according to the second aspect and/or any one of the implementations of the second aspect.

In a ninth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the reference signal measurement method according to the first aspect and/or any one implementation manner of the first aspect, or is configured to implement the reference signal measurement method according to the second aspect and/or any one implementation manner of the second aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a tenth aspect, an embodiment of the present application provides a communication system, which includes the communication apparatus of the third aspect and the communication apparatus of the fourth aspect, or includes the communication apparatus of the fifth aspect and the communication apparatus of the sixth aspect.

Drawings

Fig. 1 is an architecture diagram of a communication system provided in an embodiment of the present application;

fig. 2 is a schematic diagram of an optimal pairing beam according to an embodiment of the present application;

FIG. 3 is a schematic diagram of an optimal pairing beam according to an embodiment of the present application;

fig. 4 is a block diagram of a communication device according to an embodiment of the present disclosure;

fig. 5 is a schematic flowchart of a reference signal measurement method according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a measurement unit provided in an embodiment of the present application;

fig. 7 is another schematic diagram of a measurement unit provided in an embodiment of the present application;

fig. 8 is another schematic flow chart of a reference signal measurement method according to an embodiment of the present disclosure;

fig. 9 is a schematic diagram of a mobile terminal device according to an embodiment of the present application;

fig. 10 is another schematic flow chart of a reference signal measurement method according to an embodiment of the present application;

fig. 11 is another block diagram of a communication device according to an embodiment of the present disclosure;

fig. 12 is another block diagram of a communication device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

The technical scheme provided by the embodiment of the application can be applied to wireless communication among communication devices. The wireless communication between the 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. In the embodiments of the present application, the term "wireless communication" may also be simply referred to as "communication", and the term "communication" may also be described as "data transmission", "information transmission", or "transmission". The technical solution provided in the embodiments of the present application may be used for performing wireless communication between a scheduling entity and a subordinate entity, and those skilled in the art may use the technical solution for performing wireless communication between other scheduling entities and subordinate entities, for example, wireless communication between a macro base station and a micro base station, for example, wireless communication between a first terminal and a second terminal. For simplifying the description, the embodiments of the present application take communication between a network device and a terminal device as an example, and describe the method provided by the embodiments of the present application.

Fig. 1 is a schematic diagram of a communication system to which the technical solution provided by the embodiment of the present application is applicable, where the communication system may include one or more network devices 100 (only 1 is shown) and one or more terminal devices 200 capable of communicating with the network devices 100. Fig. 1 is a schematic diagram, and does not limit an application scenario of the technical solution provided in the embodiment of the present application.

The network device 100 may be a transmission reception node (TRP), a base station, a relay station, an access point, or the like. 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; but also wearable devices or vehicle-mounted devices, etc. In addition, 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, or an nb (nodeb) in Wideband Code Division Multiple Access (WCDMA), or an eNB or enodeb (evolved nodeb) in Long Term Evolution (LTE). The network device 100 may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario.

The terminal apparatus 200 may be a User Equipment (UE), an access terminal, a UE unit, a UE station, a mobile station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE agent, a UE device, or the like. An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capability, a computing device, a processing device, a vehicle-mounted device, a wearable device, a terminal in a 5G network, a terminal in a future evolved Public Land Mobile Network (PLMN) network, or the like.

It should be noted that the communication system shown in fig. 1 may be an LTE system, an LTE-Advanced system, an NR system, an ultra-reliable low latency communication (URLLC) scenario, a narrowband band internet of things (NB-IoT) system, an enhanced machine type communication (eMTC) system, and the like, but the communication system to which the method provided in the embodiment of the present application is applied is not limited to the above communication systems.

When the technical scheme provided by the embodiment of the application is applied to a communication system, the technical scheme can be applied to various access technologies. For example, the present invention can be applied to an Orthogonal Multiple Access (OMA) technology or a non-orthogonal multiple access (NOMA) technology. When the method is applied to the orthogonal multiple access technology, the method may be applied to Orthogonal Frequency Division Multiple Access (OFDMA) or single carrier frequency division multiple access (SC-FDMA), and the like, and the embodiments of the present application are not limited thereto. When the method is applied to the non-orthogonal multiple access technology, the method may be applied to Sparse Code Multiple Access (SCMA), multiple-user shared access (MUSA), Pattern Division Multiple Access (PDMA), Interleaved Grid Multiple Access (IGMA), resource extended multiple access (RSMA), non-orthogonal code multiple access (NCMA), or non-orthogonal code multiple access (NOCA), and the embodiments of the present application are not limited thereto.

The technical scheme provided by the embodiment of the application can be applied to various scheduling types when applied to a communication system. For example, it can be applied to grant-based scheduling or grant-free-based scheduling. When the method is applied to scheduling based on authorization, the network equipment can send scheduling information to the terminal equipment through physical layer signaling, the scheduling information carries transmission parameters, and the network equipment and the terminal equipment perform data transmission based on the transmission parameters. When the method is applied to the authorization-free scheduling, scheduling information can be preconfigured, or the network equipment can send the scheduling information to the terminal equipment through high-level signaling, the scheduling information carries transmission parameters, and the network equipment and the terminal equipment perform data transmission based on the transmission parameters. The unlicensed scheduling may also be referred to as non-dynamic scheduling (non-dynamic scheduling), non-dynamic grant (non-dynamic grant), or other names, and the embodiments of the present application are not limited thereto.

In addition, in the communication system shown in fig. 1, a plurality of antennas may be deployed on the network device 100 and/or the terminal device 200, and the performance of the wireless communication system is significantly improved by using a multi-antenna technology for communication. In some implementations, the network device 100 is a sending end, and the terminal device 200 is a receiving end; in another possible implementation manner, the terminal device 200 is a transmitting end, and the network device 100 is a receiving end. Referring to fig. 1, during communication, a transmitting end may transmit a signal to a receiving end using multiple antennas, and the receiving end may receive the signal using one or more antennas; or the transmitting end may use one antenna to transmit a signal to the receiving end, and the receiving end may use a plurality of antennas to receive the signal.

First, terms related to the embodiments of the present application are explained as follows:

(1) best paired beam:

a plurality of antennas on the transmitting end or the receiving end form an antenna array, and the angle of a beam (hereinafter referred to as a transmission beam, or a transmission beam) of a transmission signal determines the transmission gain of the transmission signal according to an equivalent antenna pattern of the antenna array of the transmitting end. The equivalent antenna pattern of the transmitting-end antenna array is used for describing the transmitting gain when signals are transmitted at various angles. For example, in a 2-dimensional space, if a transmission beam has a gain of 3dB when it is at an angle of 90 ° to the horizontal direction, signal energy may be amplified by 2 times (3dB) if a transmitting end transmits a signal with the transmission beam of 90 °. For another example, if the transmitting end transmits a signal in a transmission beam of 60 °, it may have a transmission gain of 0 dB. Similarly, the angle of the beam of the received signal (hereinafter referred to as the received beam or the received beam) determines the reception gain of the received signal according to the equivalent antenna pattern of the receiving-side antenna array. Wherein, the equivalent antenna directional diagram of the receiving end antenna array is used for describing the receiving gain when receiving signals at various angles. For example, in a 2-dimensional space, when the receiving beam has a gain of 3dB when the angle between the receiving beam and the horizontal direction is 90 °, if the receiving end receives a signal with the receiving beam of 90 °, the signal energy can be amplified by a factor of 2. For another example, if the signal is received with a receive beam of 60 °, there is a receive gain of 0 dB.

Therefore, when the transmitting end transmits signals with a certain transmitting beam angle, and the receiving end receives signals with a certain receiving beam angle, the transmitting gain and the receiving gain of the signals can be the highest, and the interference is the minimum, so that the correct receiving rate of the signals is improved, and the transmission performance of the communication system is improved. The transmitting beam and the receiving beam at the specific angle may be referred to as an optimal paired beam, and the optimal paired beam is used for corresponding transmission and reception, so that the transmission performance of the communication system can be improved.

For example, sets of paired beams are determined through each candidate transmit beam and each candidate receive beam. The paired beam with the highest received energy may be determined as the best paired beam. For example, referring to fig. 2, the transmitting end has 3 transmit beams, TX1, TX2, and TX3, respectively. The receiving end has 2 receiving beams, RX1 and RX2 respectively. During communication, 6 groups of paired beams can be used, namely TX1-RX1, TX1-RX2, TX2-RX1, TX2-RX2, TX3-RX1 and TX3-RX 2. Assuming that the transmitting end transmits a signal in TX1 and the receiving end receives a signal in RX2, the received energy of the signal is the highest. The best paired beam is then TX1-RX 2.

(2) Port:

in the embodiment of the present application, the port may be understood as an antenna port. Alternatively, the understanding of the antenna ports may be as described in relation to the LTE protocol 36.211 or the NR protocol 38.211. For example, for an antenna port, a channel transmitted through the antenna port on one time domain symbol may be inferred from channels 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.

In the communication process, a transmitting end uses a transmitting beam to transmit signals through a transmitting port, and a receiving end uses a receiving beam to receive signals through a receiving port. The port described in the embodiments of the present application may be a physical antenna port or a logical antenna port. Signals may be received simultaneously or transmitted simultaneously on different physical antenna ports.

One or more physical antenna ports may correspond to or be equivalent to one logical antenna port, transmitting signals through the same beam. For some devices, after transmitting a signal on one analog beam, a switch is required to transmit a signal on another analog beam. Similarly, after the receiving end receives signals on one analog beam, it needs to switch to receive signals on another analog beam. Therefore, physical antenna ports belonging to different logical antenna ports cannot receive signals simultaneously, and cannot transmit signals simultaneously. Illustratively, the ports 1 to 4 form a logical antenna port, and signals can be transmitted through the same analog beam. The ports 5 to 8 form a logical antenna port, and signals can be transmitted through the same analog beam. Any two ports of the ports 1 to 4 can simultaneously receive signals or simultaneously transmit signals, any two ports of the ports 5 to 8 can simultaneously receive signals or simultaneously transmit signals, and the ports of the ports 1 to 4 cannot simultaneously transmit or simultaneously receive signals with the ports of the ports 5 to 8, for example, the ports 4 cannot simultaneously transmit or simultaneously receive signals with the ports 5.

Generally, the network device and the terminal device need to go through channel measurement to determine the best paired beam. When the network equipment determines the optimal pairing wave beam, the transmitting wave beam in the optimal pairing wave beam is used for transmitting signals, and the terminal equipment uses the receiving wave beam in the optimal pairing wave beam for receiving signals, so that better signal transmission performance can be obtained. In a scenario when the terminal device is stationary or moving slowly, the channel condition between the network device and the terminal device does not change much, and the channel condition when the network device determines the best paired beam is similar to the channel condition when the network device actually schedules the terminal device, so that the channel condition between the best paired beam predetermined by the network device and the channel condition between the best paired beam and the terminal device are always matched, and the best paired beam does not fail. However, if the terminal device is in a high-speed motion state, the channel condition between the network device and the terminal device is unstable, and the channel condition when the network device actually schedules the terminal device is greatly different from the channel condition when the best paired beam is determined, which causes the best paired beam to fail. If the network device still transmits signals using the transmitting beam of the previously determined optimal paired beams and the terminal device still uses the receiving beam of the previously determined optimal paired beams, the correct receiving rate of the signals is reduced because the previously determined optimal paired beams do not match the current channel conditions, thereby reducing the transmission performance of the communication system. In addition, if the network device still schedules the terminal device based on other Channel State Information (CSI) obtained when determining the best paired beam, such as a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a Rank Indicator (RI), a CSI-RS resource Indicator (CRI), and the like, the transmission performance of the communication system may also be reduced.

For example, referring to fig. 3, the best paired beam determined by the network device after performing channel measurement is TX1-RX2, and since the terminal device is in high-speed motion and the channel condition with the network device changes, the best paired beam actually scheduled by the network device has changed, such as: becomes TX2-RX 1.

In a method provided in an embodiment of the present application, a network device sends first information to a terminal device, where the first information is used to indicate a first measurement unit, N receiving ports of the terminal device, and a downlink reference signal received by the terminal device through each of the N receiving ports in the first measurement unit. In addition, the network device may further receive second information from the terminal device, where the second information is used to indicate a downlink measurement result of the first measurement unit. In the method provided by the embodiment of the present application, the network device may instruct the terminal device to receive and measure the downlink reference signal through a specific port at a specific time (e.g., the measurement unit in the embodiment of the present application) through the first information, and the terminal device may also report the measurement result to the network device through the second information. Further, the network device may determine, according to the measurement result, the receiving port with the highest received signal energy at a specific time and the corresponding transmitting port, that is, may determine the best paired beam at the specific time. Further, the network device may determine a period of time for which the best paired beam remains unchanged, i.e., an effective duration of the best paired beam. Under the scene that the terminal equipment moves at a high speed, the network equipment uses the transmitting wave beam of the optimal matched wave beam to transmit signals within the effective duration of the optimal matched wave beam, and the terminal equipment uses the receiving wave beam of the optimal matched wave beam to receive the signals, so that the receiving energy of the signals is highest, and the interference is minimum. And after the optimal matched beam fails, the optimal matched beam is determined again, so that the problem that the transmission performance of the communication system is reduced due to the failure of the optimal matched beam is avoided by using the failed optimal matched beam to transmit and receive signals.

In order to implement the functions in the method provided by the embodiment of the present application, the network device and the terminal may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution. For example, the communication method provided by the embodiment of the present application may be applied to the communication apparatus shown in fig. 4, which may be the network device 100 or the terminal device 200 in the communication system shown in fig. 1. As shown in fig. 4, the communication apparatus may include at least one processor 401 for implementing the communication method provided in the embodiment of the present application. The communication device may further include a memory 402 and a communication interface 403. The communication device may further include a communication bus 404, which may be used for information interaction between devices, units or modules in the communication device.

The following describes each component of the communication apparatus in detail with reference to fig. 4:

the processor 401 is a control center of the communication apparatus, and may be a single processor or a collective term for a plurality of processing elements. For example, the processor 401 is a Central Processing Unit (CPU), and may be an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, such as: one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).

The processor 401 is coupled to the memory 402. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 401 may perform various functions of the communication device by executing or executing instructions stored in the memory 402 and by invoking data stored in the memory 402.

In particular implementations, processor 401 may include one or more CPUs such as CPU0 and CPU1 shown in fig. 4 as an example.

In particular implementations, a communication device may include multiple processors, such as processor 401 and processor 405 shown in fig. 4, for example, as an embodiment. Each of these processors may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). A processor herein may refer to one or more communication devices, circuits, and/or processing cores for processing data (e.g., 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 of dynamic storage communication devices that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), but is not limited to, magnetic disk storage media or other magnetic storage communication devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 402 may be self-contained and coupled to the processor 401 via a communication bus 404. The memory 402 may also be integrated with the processor 401.

Optionally, the memory 402 is used for storing a software program for executing the scheme of the embodiment of the present application, and is controlled by the processor 401 to execute.

A communication interface 403 for communication with a second device. In the embodiment of the present application, a communication interface is used for communication between the communication apparatus shown in fig. 4 and other devices or networks, and the communication interface may be a transceiver, a circuit, a module, an interface, or the like. In fig. 4, the communication interface 403 is illustrated as a transceiver 403. Of course, the communication interface 403 may also be used for communicating with a communication network, such as an ethernet, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), etc. The communication interface 403 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function.

The communication bus 404 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 4, but this does not indicate only one bus or one type of bus.

The communication device configuration shown in fig. 4 does not constitute a limitation of the communication device and may include more or fewer components than those shown, or some of the components may be combined, or a different arrangement of components.

The embodiment of the present application provides a reference signal measurement method, as shown in fig. 5, the method includes the following steps:

501. determining a first measurement unit, N receiving ports of the terminal device, and a downlink reference signal for the terminal device to receive through each of the N receiving ports in the first measurement unit.

At least one parameter of the first measurement unit, the N receiving ports of the terminal device, and the downlink reference signal received by the terminal device through each of the N receiving ports in the first measurement unit may be preconfigured, or may be indicated to the terminal device by the network device. Illustratively, the first measurement unit is preconfigured, and the network device indicates to the terminal device N receiving ports of the terminal device and downlink reference signals for the terminal device to receive at the first measurement unit through each of the N receiving ports. Further illustratively, the first measurement unit and the N receiving ports of the terminal device are preconfigured, and the network device indicates to the terminal device a downlink reference signal for the terminal device to receive at the first measurement unit through each of the N receiving ports.

In one possible implementation, the network device sends first information to the terminal device, where the first information is used to indicate the first measurement unit, N receiving ports of the terminal device, and a downlink reference signal received at the first measurement unit through each of the N receiving ports.

In another possible implementation, the network device may indicate, to the terminal device, the first measurement unit, N receiving ports of the terminal device, and a downlink reference signal for receiving at the first measurement unit through each of the N receiving ports through 2 or 3 different signaling.

Wherein N is an integer greater than or equal to 1. The first measurement unit is any one of measurement units in a measurement period configured by the network device. Wherein, the measurement unit may be a unit length in the time domain, such as: the length of one measurement unit may be a positive integer number of symbols, slots, subframes, etc. in the time domain, or a positive integer number of milliseconds (ms) or seconds(s) such as 0.5 ms, 1ms, 5ms, etc. in the time domain. In the embodiment of the present application, the positive integer may be an integer of 1 or more, for example, an integer of 1, 2, 3, or more. The measurement period may be a unit length in the time domain, such as: the length of one measurement unit may be a positive integer number of symbols, slots, subframes, etc. in the time domain, or a positive integer number of milliseconds or seconds in the time domain, such as 5ms, 10ms, etc.

The receiving port refers to a port for receiving a signal (e.g., a downlink reference signal) by a terminal device, and the name of the port is not limited to the above "receiving port", but may also be other names, such as: a first port, a terminal device side receiving port, etc. The downlink reference signal may be a Reference Signal (RS), for example, a channel state information-reference signal (CSI-RS). Alternatively, the downlink reference signal may be a Pilot signal (Pilot), for example, a Common-Pilot Channel (Common-Pilot Channel). Alternatively, the downlink reference signal may be other downlink signals that can be used for channel estimation or channel measurement. It should be noted that, the explanation of the port refers to the description of the terms in the embodiments of the present application, and is not repeated herein.

Optionally, the first information may include an identifier of the first measurement unit, identifiers of the N receiving ports, and sequence information and/or time domain resource information of the downlink reference signal received by each of the N receiving ports.

The identifier of the first measurement unit is used to indicate the first measurement unit, and the terminal device may determine when to receive the downlink reference signal according to the identifier of the first measurement unit. For example, the identification of the first measurement unit may be information of an index, a number, an offset position in a period, and the like of the first measurement unit.

The identifiers of the N receiving ports are used to indicate the N receiving ports that receive the downlink reference signals at the first measurement unit, and the terminal device may determine, according to the identifiers of the N receiving ports, through which N receiving ports the first measurement unit receives the downlink reference signals from the network device.

The sequence information of the downlink reference signal received by each of the N receiving ports is used to determine a sequence value of the downlink reference signal. Illustratively, the sequence value of the downlink reference signal may be a sequence value of a reference signal described in LTE standard 36.211 or NR standard 38.211. For example, the sequence information of the downlink reference signal received by each receiving port may be an initial value of the reference signal, cyclic shift, and the like. It should be noted that 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, for example, 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 a time-domain resource and/or a 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 a resource location of the downlink reference signal in the time domain, for example, a time slot and/or a time domain symbol where the downlink reference signal is located. The frequency domain resource of the downlink reference signal received by each of the N receiving ports is used to determine a resource location of the downlink reference signal in the frequency domain, for example, a Resource Block (RB) and/or a subcarrier where the downlink reference signal is located. The positions of the time-frequency resources of different ports may be the same or different, and the embodiment of the present application is not limited.

For example, it is assumed that the network device sends

downlink reference signals

1, 2 and 3 in the first measurement unit, and the network device configures the terminal device to receive the downlink reference signals through the receiving port 1 and the receiving port 2 in the first measurement unit. The first information includes an identifier of a receiving port 1, an identifier of a receiving port 2, sequence information of 3 downlink reference signals, and the 3 downlink reference signal time-frequency resources. For example, the sequences used by the reference signals 1 to 3 are sequence 1, sequence 2, and sequence 3, respectively, and the time-frequency resources used by the reference signals 1 to 3 are time-frequency resource 1, time-frequency resource 2, and time-frequency resource 3, respectively. The terminal device may distinguish the 3 downlink reference signals according to different sequence resources or time-frequency resources.

In addition, it is assumed that the network device configures the terminal device to measure the reference signals 1 and 2 for the receiving port 1, and the terminal device measures the reference signals 1 and 3 for the receiving port 2. Specifically, the identifier of the receiving port 1 in the first information corresponds to the sequence information and the time domain resource information of the reference signal 1 and the reference signal 2, and the identifier of the receiving port 2 corresponds to the sequence information and the time domain resource information of the reference signal 1 and the reference signal 3. Further, the terminal device may determine, according to the first information, to receive and

measure reference signals

1 and 2 for the receiving port 1, and to receive and

measure reference signals

1 and 3 for the receiving port 2. When the network device issues the reference signal 1, the terminal device receives and measures the reference signal for the receiving port 1 and the receiving port 2. When the network device issues the reference signal 2, the terminal device receives and measures the signal at the receiving port 1. When the network device issues the reference signal 3, the terminal device receives and measures the signal at the receiving port 2.

502. And the network equipment receives second information from the terminal equipment, wherein the second information is used for indicating the downlink measurement result of the first measurement unit.

The downlink measurement result of the first measurement unit is a result of the terminal device measuring a 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 equipment receives the downlink reference signal issued by the network equipment through the receiving port, and measures the received downlink reference signal to obtain a measurement result. After the terminal device completes the measurement, the downlink measurement result of the downlink reference signal received by the first measurement unit can be reported to the network device through the second information. In a 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. Alternatively, 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, a measurement unit subsequent to the first measurement unit measures the downlink reference signal received by the first measurement unit.

Optionally, 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 to one, and one target downlink reference signal identifier in the N target downlink reference signal identifiers is an identifier of a target downlink reference signal with an optimal measurement result on a 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. In this embodiment of the present application, the downlink reference signal with the best measurement effect on a certain receiving port is referred to as a target downlink reference signal on the receiving port.

It should be noted that 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. For example, the receiving port 1 receives and measures the downlink reference signal 1 and the downlink reference signal 2, the receiving port 2 receives and measures the downlink reference signal 2 and the downlink reference signal 3, the best measurement result on the receiving port 1 is the downlink reference signal 1, the best measurement result on the receiving port 2 is the downlink reference signal 3, and the identifiers of the target downlink reference signals corresponding to the receiving port 1 and the receiving port 2 are different. Or, the best measurement result on the receiving port 1 is the downlink reference signal 2, the best measurement result on the receiving port 2 is the downlink reference signal 2, and the target downlink reference signal identifications corresponding to the receiving port 1 and the receiving port 2 are the same.

In a possible implementation manner, the downlink measurement result obtained by the terminal device measuring the downlink reference signal may be a parameter used to evaluate the received energy of the downlink reference signal. For example, the downlink measurement result may be a Channel Quality Indicator (CQI) of a downlink reference signal, a Reference Signal Receiving Power (RSRP), and a signal-to-interference-plus-noise ratio (SINR).

In one possible implementation, the measurement results of the receiving ports in the second information are arranged in a specific order. This order is pre-configured or configured by the network device through signaling. For example, the measurement results in the second information are arranged in port order. Illustratively, the second information includes a measurement result of the receiving port 1, a measurement result of the receiving port 2, and a measurement result of the receiving port 3 in this order.

Optionally, the network device receives port capability information from a terminal device, where the port capability information is used to indicate Q port groups of the terminal device, and each port group in the Q port groups includes one or more ports. Wherein, the ports in each port group support simultaneous receiving and/or transmitting, and different port groups support time-division receiving and/or transmitting. The number of ports included in different port groups may be the same or different, and the embodiments of the present application are not limited. In one possible implementation, 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 the terminal device uses a certain analog beam for transceiving, it needs to switch to use other analog beams for transceiving. Therefore, the receiving ports of the same port group can receive signals or transmit signals simultaneously, and the receiving ports belonging to different port groups cannot receive signals or transmit signals simultaneously, i.e. time division receiving and/or transmitting is supported.

The network device may configure the first information according to the receiving port capability information. Specifically, the network device determines that some receiving ports of the terminal device can receive signals simultaneously according to the port capability information, and the first information may include the identifications of these receiving ports. For example, the receiving port 1 and the receiving port 2 belong to the same port group, and can receive signals simultaneously. The first information may include an identifier of receiving port 1 and an identifier of receiving port 2, and receiving port 1 and receiving port 2 receive and measure at the same time in the first measuring unit. The network device determines that some receiving ports of the terminal device cannot receive signals simultaneously according to the port capability information, and the first information cannot include the identifications of the receiving ports simultaneously. For example, the receiving port 1 and the 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 identification of the receiving port 1 and the identification of the receiving port 5 at the same time, that is, the receiving port 1 and the receiving port 5 cannot receive and measure at the first measuring unit at the same time.

Optionally, the method shown in fig. 5 further includes: the network device sends M downlink reference signals to the terminal device through M sending ports in a first measurement unit, wherein the M downlink reference signals are in one-to-one correspondence with the M sending ports, and M is an integer greater than or equal to 1. Specifically, the M downlink reference signals have respective identifiers, and different downlink reference signals can be distinguished through the identifiers of the downlink reference signals. In addition, each downlink reference signal is transmitted through a designated transmission port. After the network device obtains the target downlink reference signal identifier corresponding to a certain receiving port in the second information, the network device determines a sending port for sending the target downlink reference signal according to the target downlink reference signal identifier, and then determines a group of best paired beams by combining the receiving port corresponding to the target downlink reference signal. For example, the second information includes an identifier of a receiving port 1 and an identifier of a target downlink reference signal corresponding to the receiving port 1, assuming that the identifier of the target downlink reference signal is CSI-RS1, the network device transmits CSI-RS1 through the transmitting port 1, the network device may transmit CSI-RS1 through the transmitting port 1 using a transmitting beam 1, and the terminal device may receive CSI-RS1 through the receiving port 1 using a receiving beam 1, so that a set of best paired beams, i.e., transmitting beam 1-receiving beam 1, may be determined.

Optionally, the second information sent by the terminal device is further 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 a CQI measured on the receiving port corresponding to the N CQIs. Specifically, one of the N CQIs is a CQI obtained by measuring a 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.

In a possible implementation manner, the network device may pre-configure a period of time as a measurement period, where the measurement period includes a plurality of measurement units. The measurement units in the measurement period may be discrete or continuous. Illustratively, referring to fig. 6, a measurement cycle includes 3 consecutive measurement units. The network device may send the downlink reference signal through the sending port in multiple measurement units in the measurement period, and the terminal device may also receive the specified downlink reference signal through the specified receiving port in different measurement units, and report the downlink measurement result of the receiving port to the network device. In this way, the network device may obtain downlink measurement results corresponding to the multiple measurement units, and may further determine the best paired beam corresponding to each measurement unit, and may also determine the effective duration of the best paired beam.

For example, referring to fig. 7, it is assumed that the measurement unit is an Orthogonal Frequency Division Multiplexing (OFDM) symbol in a time domain. The network device transmits downlink reference signal 1 through transmission port 1 at symbol 1, and transmits downlink reference signal 3 through transmission port 3 at symbol 1. Meanwhile, the terminal device receives and measures downlink reference signals 1 and downlink reference signals 3 through a receiving port 1 at symbol 1. The terminal equipment receives and measures downlink reference signals 1 and downlink reference signals 3 through a receiving port 2 at a symbol 1. The best measurement result at the receiving port 1 is the downlink reference signal 1, and the best measurement result at the receiving port 2 is the downlink reference signal 3. Thus, the best paired beams on symbol 1 are transmit beam 1-receive beam 1, transmit beam 3-receive beam 2. It is assumed that the transmission beam corresponding to the transmission port 1 is the transmission beam 1, the transmission beam corresponding to the transmission port 3 is the transmission beam 3, the reception beam corresponding to the reception port 1 is the reception beam 1, and the reception beam corresponding to the reception port 2 is the reception beam 2.

In addition, the network device transmits downlink reference signal 2 through transmission port 2 at symbol 3, and transmits downlink reference signal 3 through transmission port 3 at symbol 3. Meanwhile, the terminal equipment receives and measures the

downlink reference signals

2 and 3 through the receiving port 1 at the symbol 3. The terminal equipment receives and measures the downlink reference signals 2 and the downlink reference signals 3 through the receiving port 2 at the symbol 3. The best measurement result at the receiving port 1 is the downlink reference signal 2, and the best measurement result at the receiving port 2 is the downlink reference signal 3. Thus, the best paired beams on symbol 3 are transmit beam 2-receive beam 1, transmit beam 3-receive beam 2. It can be seen that the set of best paired beams, i.e. the transmission beam 3-the reception beam 2, does not change in the period from symbol 1 to symbol 3, and therefore, it can be considered that the channel condition corresponding to the transmission beam 3-the reception beam 2 hardly changes in the period from symbol 1 to symbol 3, and the effective duration of the best paired beam, i.e. the transmission beam 3-the reception beam 2, is 3 symbols.

Further, when the terminal device is in high-speed motion, the network device may determine when the best paired beam fails according to the effective duration of the best paired beam, and use a new best paired beam for transceiving in time, thereby avoiding using the failed best paired beam to reduce the correct receiving rate of the signal. For example, in the time interval from symbol 1 to symbol 9 in the time domain, the terminal device performs high-speed motion, the best paired beam of the transmission beam 3-the reception beam 2 is used for transmitting and receiving signals on symbol 1, the best paired beam of the transmission beam 3-the reception beam 2 is failed on symbol 4, the network device needs to re-determine the best paired beam, and the network device and the terminal device perform signal transmission and reception based on the newly determined best paired beam.

In a possible implementation manner, the network device may further determine the effective duration of the downlink measurement result in the effective duration of the best paired beam, and 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 the transmit beam 3-receive beam 2 on symbol 1, the downlink measurement result is CQI, and the network device may perform downlink scheduling on the CQI terminal device according to the measurement result on symbol 1 through symbol 3.

When the method shown in fig. 5 is applied to a TDD system, the method may further include: the network device sends third information to the terminal device, where the third information is used to indicate a second measurement unit, R sending ports of the terminal device, and an uplink reference signal used for the terminal device to send 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 the information, in the second measurement unit, the terminal device may send the uplink reference signal to the network device through the R sending ports.

The embodiment of the application can be applied to a communication system supporting a Time Division Duplex (TDD) communication system. A communication system supporting a TDD communication scheme has reciprocity (channel reciprocity) between uplink and downlink. Reciprocity means that the uplink channel and the downlink channel have approximately the same channel condition (channelprofile). The best paired beam described in the embodiment of the present application may also be considered as a channel condition, and on the premise that reciprocity is established, the best paired beam in the uplink is also applicable to the downlink. For example, the set of best paired beams on the uplink is UE _ TX _1-Base _ RX _2, that is, when the terminal device uses beam 1 to transmit signals and the network device uses beam 2 to receive signals, the received energy of the signals 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 transmit signals, and when the terminal device uses beam 1 to receive signals, the received energy of the signals is the highest, and the interference is the smallest.

Based on the reciprocity of the TDD communication system, an embodiment of the present application further provides a reference signal measurement method, as shown in fig. 8, where the method includes the following steps:

801. the network device sends third information to the terminal device, where the third information is used to indicate a second measurement unit, R sending ports of the terminal device, and an uplink reference signal used for the terminal device to send through each of the R sending ports in the second measurement unit, where R is an integer greater than or equal to 1.

The second measurement unit is any one measurement unit in a second measurement period configured by the network device. Wherein, the measurement unit may be a unit length in the time domain, such as: the length of one measurement unit may be a positive integer number of symbols, slots, subframes, etc. in the time domain, or a positive integer number of milliseconds (ms) or seconds(s) such as 0.5 ms, 1ms, 5ms, etc. in the time domain. The second measurement period may be a unit length in the time domain, such as: the length of one measurement unit may be a positive integer number of symbols, slots, subframes, etc. in the time domain, or a positive integer number of milliseconds or seconds in the time domain, such as 5ms, 10ms, etc. The length of the first measuring unit and the length of the second measuring unit may be the same or different, and the embodiment of the present application is not limited; 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, and the embodiment of the present application is not limited;

illustratively, the network device receives the uplink reference signal sent by the terminal device at time unit T0.

In a specific implementation, the network device may determine a plurality of receiving ports for receiving the uplink reference signal, and receive the uplink reference signal from the terminal device through the receiving ports.

The uplink reference signal sent by the terminal device may be a Sounding Reference Signal (SRS), or may be another uplink signal that can be used for performing uplink channel measurement or uplink channel estimation. After the network device receives the uplink reference signal sent by the terminal device, the uplink channel state can be obtained by measuring the received uplink reference signal.

Before the terminal device sends the uplink reference signal, the network device may configure, for the terminal device, resources occupied by each uplink reference signal, for example, time domain resources, frequency domain resources, and the like occupied by the uplink reference signal. The terminal device may 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 a resource to which the uplink reference signal is mapped.

After receiving the uplink reference signal from the terminal device, the network device may obtain the best paired beam on the uplink of the 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. For example, the network device receives the uplink reference signal through the receiving port 1 in the time unit T0 with the best measurement result, and in addition, the uplink reference signal is sent by the sending port 1 of the terminal device. Thus, the network device may know that the best paired beam in time cell T0 is UE _ TX _1-Base _ RX _ 1. Wherein, UE _ TX _1 represents a transmission beam 1 for a terminal device to transmit a signal, which may be considered as a transmission beam corresponding to port 1 of the terminal device; base _ RX _1 represents a receive beam 1 for a network device to receive signals, which may be considered as a receive beam corresponding to port 1 of the network device.

Since TDD systems support uplink and downlink reciprocity, in time unit T0, the best paired beam on the uplink is also applicable to the downlink, i.e. in time unit T0, the best paired beam on the downlink may be Base _ TX _1-UE _ RX _ 1. Wherein, Base _ TX _1 represents a transmission beam 1 of a signal transmitted by a network device, and may be considered as a transmission beam corresponding to port 1 of the network device; UE _ RX _1 represents a receiving beam 1 for receiving signals by the terminal device, and can be considered as a receiving beam corresponding to port 1 of the terminal device. It should be noted that the beam direction of UE _ TX _1 is the same as that of UE _ RX _1, and the beam direction of Base _ TX _1 is the same as that of Base _ RX _ 1.

Similarly, the network device may also know other best paired beams, e.g., Base _ TX _2-UE _ RX _ 2.

802. The network device sends first information to the terminal device, wherein the first information is used for indicating a first measurement unit, N receiving ports of the terminal device and a downlink reference signal received by the first measurement unit through each port of the N receiving ports.

Illustratively, the network device sends first information to the terminal device, for instructing the terminal device to receive the downlink reference signal using receiving port 1 at time unit T1.

It should be noted that the first information in step 802 may refer to the first information in step 501.

In the embodiment of the present application, the downlink reference signal may be a CSI-RS or other signals that can be used for downlink measurement, such as a cell specific reference signal (CRS), a DMRS, a synchronization signal, a common pilot, and the like. The network device configures respective numbers for different downlink reference signals, and the first information may include an identifier of the receiving port, an identifier of the time unit, and a number of the corresponding downlink reference signal.

Specifically, taking the downlink reference signal as CSI-RS as an example, the first information includes an identifier of time unit T1, an identifier of receiving port 1, and downlink reference signal identifiers CSI-RS1 and CSI-RS2 corresponding to receiving port 1. That is, the network device instructs the terminal device to receive the CSI-RS1 and CSI-RS2 through the receiving port 1 at time unit T1 through the first information.

It should be noted that, step 803 is only taken as an example of receiving port 1, and the network device may also configure other receiving ports (one or more receiving ports) of the terminal device to receive the downlink reference signal in time unit T1, which is not limited in this embodiment of the application.

803. The network device sends the downlink reference signal to the terminal device at time unit T1.

In a specific implementation, the network device sends the CSI-RS according to a certain rule, that is, sends the corresponding CSI-RS through a specified sending port in a specified time unit. It should be noted that the network device configures a time unit in which the downlink reference signal is transmitted. In addition, the downlink reference signals correspond to the transmission ports of the network device one to one, and the transmission ports of the network device are used for transmitting the downlink reference signals corresponding to the transmission ports.

Taking the downlink reference signal as the CSI-RS as an example, it is assumed that the CSI-RS1 corresponds to transmission port 1 of the network device, and the CSI-RS2 corresponds to transmission port 2 of the network device. The network device may transmit CSI-RS1 through transmit port 1 and CSI-RS2 through transmit port 2 at time unit T1.

804. And the terminal equipment sends second information to the network equipment, wherein the second information is used for indicating the downlink measurement result of the first measurement unit.

Exemplarily, the terminal device sends the second information to the network device, and reports the downlink measurement result of the receiving port 1.

After the terminal device receives the first information sent by the network device in step 803, it may 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 may also measure the received downlink reference signal to obtain a downlink measurement result of the receiving port. In addition, the terminal equipment can also report a downlink measurement result to the network equipment. It should be noted that, in the embodiment of the present application, the time for the terminal device to measure the downlink reference signal is not limited, the received downlink reference signal may be measured in the time unit for receiving the downlink reference signal, or the downlink reference signal may be measured at a time after the time unit for receiving the downlink reference signal.

It should be noted that the second information in step 804 may refer to the second information in step 502.

Taking the downlink reference signal as the CSI-RS as an example, the downlink measurement result reported by the terminal device may specifically include an 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 CSI-RS with the largest measured CQI or RSRP. For example, the terminal device receives the CSI-RS1 and CSI-RS2 through the reception port 1 at time unit T1. Wherein the CQI obtained by measuring the CSI-RS1 is the maximum.

In a specific implementation, the second information sent by the terminal device may include a downlink measurement result of the receiving port 1. The downlink measurement result of the receiving port 1 may include an identifier of the time unit T1, an identifier of the receiving port 1, and an identifier of a CSI-RS with the best measurement result on the receiving port 1, for example, an identifier of the CSI-RS 1.

805. And the network equipment receives the second information sent by the terminal equipment.

It should be noted that, after receiving the second information, the network device may determine the best paired beam in the time unit T1 according to the second information. In addition, if the best paired beams in two time units represent similar channel conditions, the effective duration of the best paired beams can be determined according to the interval between the two time units. For example, the best paired beam in time unit T0 and the best paired beam in time unit T1 represent similar channel conditions, and the effective duration of the best paired beam in time unit T0 can be considered as | T1-T0 |.

In one possible implementation, when the terminal device is in a static state, and the transmitting beams and the receiving beams in the two best paired beams on the downlink are the same, the two best paired beams are considered to be the same, which represents similar channel conditions. That is, if the transmit beam and the receive beam of the best paired beam corresponding to two time units are the same, the interval between the two time units can be determined as the effective duration of the best paired beam. Illustratively, at time element T1, the network device transmits CSI-RS1 via transmit port 1 and CSI-RS2 via transmit port 2. At time element T1, receive port 1 of the terminal device receives CSI-RS1 and CSI-RS 2. Among them, the measurement result obtained by measuring the CSI-RS1 is the best. Then the best paired beam in time unit T1 is Base _ TX _1-UE _ RX _ 1. In addition, step 801 determines that the best paired beam in time unit T0 is Base _ TX _1-UE _ RX _ 1. Thus, the validity duration of the best paired beam still being Base _ TX _1-UE _ RX _1 may be determined to be | T1-T0 |.

When the terminal device is in a static state, the terminal device will not be displaced, and the channel condition of receiving port 1 in time unit T0 is similar to the channel condition of receiving port 1 in time unit T1. The downstream measurement of receiving port 1 in time unit T0 can be used to predict the downstream measurement of receiving port 1 in time unit T1.

In another possible implementation, the terminal device is in motion, and the transmit beams in the two best paired beams on the downlink are the same, but the receive beams are different, so that it can be considered that the two receive beams have similar channel conditions for a period of time. Further, if the transmitting beams in the best paired beams of the two time units are the same and the receiving beams are different, the best paired beams in the interval of the two time units can also be considered to be relatively stable, and the effective duration of the best paired beams is determined as the interval of the two time units.

For example, referring to fig. 9, a terminal device is a vehicle (vehicle) as an example. Assume that there are two antennas, antenna 1 and antenna 2, on the vehicle. The antenna 1 is distributed on the vehicle head, the antenna 2 is distributed on the vehicle tail, and included angles between the antenna 1 and the antenna 2 and the horizontal plane are the same and are both 30 degrees. In addition, the antenna 1 is a reception port 1 of the terminal device, and the antenna 2 is a reception port 2 of the terminal device. In a time unit T0, when the vehicle head passes through point a, the network device receives the uplink reference signals sent by the

antennas

1 and 2, the network device finds that the measurement result of the uplink reference signal sent by the antenna 1 is optimal by measuring the received uplink reference signal, and assumes that the beam corresponding to the antenna 1 is UE _ TX _1, and the network device receives the uplink reference signal sent by the antenna 1 through Base _ RX _1, thereby determining that the optimal pairing beam Base _ RX _1-UE _ TX _1 exists on the uplink in the time unit T0. Further, due to the uplink reciprocity, there is a best paired beam Base _ TX _1-UE _ RX _1 on the downlink in time unit T0.

When the vehicle continues to run, in a time unit T1, the tail of the vehicle passes through the point A, the network device sends CSI-RS1 through the sending port 1 and sends CSI-RS2 through the sending port 2, and the antenna 2 receives the CSI-RS1 and the CSI-RS2 sent by the network device. The best measurement result on the antenna 2 is the CSI-RS 1. Since the transmission beam corresponding to the transmission port 1 is Base _ RX _1 and the reception 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.

It should be noted that the relative direction angle between the terminal device and the base station affects the channel condition between the terminal device and the base station. Referring to fig. 9, when the vehicle head passes through point a, the relative directional angles of the

antennas

1 and 2 with respect to the base station are different, and thus, the channel conditions between the

antennas

1 and 2 and the base station are also different. When the vehicle head passes through point B, the relative directional angle of the antenna 2 with respect to the base station is the same as the relative directional angle of the antenna 1 with respect to the base station when the vehicle head passes through point a, that is, the channel condition between the antenna 2 and the base station when the vehicle head passes through point B is similar to the channel condition between the antenna 1 and the base station when the vehicle head passes through point a. Since the best paired beams may represent channel conditions, the channel conditions represented by the best paired beams Base _ TX _1-UE _ RX _1, Base _ TX _1-UE _ RX _2 may be considered similar. Then, it can be considered that the effective duration of the best paired beam Base _ TX _1-UE _ RX _1 in time unit T0 may be | T1-T0 |.

When the terminal device is in motion, the channel condition of receiving port 1 at time unit T0 is similar to the channel condition of receiving port 2 at time unit T1, with the displacement generated by the terminal device. The downstream measurement of receiving port 1 in time unit T0 can be used to predict the downstream measurement of receiving port 2 in time unit T1.

Optionally, in the embodiment shown in fig. 8, the network device may also schedule the terminal device according to the effective duration of the best paired beam.

In a specific implementation, it can be considered that the channel condition represented by the best paired beam is stable within the effective duration of the best paired beam. Thus, the network device can predict the channel conditions within the validity period. For example, the channel condition for time unit (T2+ | T1-T0|) is predicted at time unit T2 from the channel condition (e.g., RSRP, CQI, etc.) for time unit T2. Furthermore, the scheduling information of the time unit (T2+ | T1-T0|) can be determined according to the result of the prediction, for example, the transmitting beam direction of the network device time unit (T2+ | T1-T0|), the receiving beam direction of the terminal device in the time unit (T2+ | T1-T0|), the size of the scheduling packet, the time-frequency resource of the scheduling packet, the modulation mode, the code rate, and the like.

It can be seen that in the communication system of the TDD communication scheme, since the communication system supports uplink and downlink reciprocity, the network device can know the best paired beam (i.e. the best paired relationship between the transmission beam of the network device and the reception beam of the terminal device) on the downlink in the first time unit (e.g. time unit T0) through the SRS. In addition, the network device may further instruct the terminal device to receive the specified downlink reference signal through the specified receiving port in a second time unit (e.g., time unit T1), and report the downlink measurement result on the port to the network device, and then the network device may further determine the best paired beam on the downlink in the second time unit according to the downlink measurement result reported by the terminal device. When the best paired beams in the first time unit and the second time unit represent similar channel conditions, the network device may further determine an effective duration of the best paired beams, i.e., an interval between the first time unit and the second time unit. When the terminal equipment is in a high-speed moving scene, the network equipment uses the transmitting beam of the optimal matching beam to transmit signals within the effective duration of the optimal matching beam, and the terminal equipment uses the receiving beam in the optimal matching pair to receive the signals, so that the receiving energy of the signals is highest, and the interference is minimum. And in the effective duration of the optimal pairing wave beam, the optimal pairing wave beam is used for channel prediction, and the terminal equipment is efficiently scheduled. And after the optimal matched beam fails, the optimal matched beam is determined again, so that the problem that the optimal matched beam which fails is used for transmitting and receiving signals is avoided, and the problem that the correct receiving rate of signal receiving is reduced due to the failure of the optimal matched beam is avoided.

The embodiment of the application also provides a reference signal measuring method, which is suitable for a communication system supporting the FDD communication system. As shown in fig. 10, the method specifically includes the following steps:

1001. and the network equipment sends the downlink reference signal to the terminal equipment.

In a specific implementation, the network device may indicate, to the terminal device, a period and an offset of the downlink reference signal. The period is used for indicating the number of time units included in one period for transmitting the downlink reference signal, and the offset is used for indicating the time units used for transmitting the downlink reference signal in one period.

Optionally, the period and/or offset of the downlink reference signal may be preconfigured.

The network device may send the downlink reference signal to the terminal device within a period of time according to the period and the offset of the downlink reference signal. The time period may be preconfigured, or may be indicated by the network device for the terminal device. For example, the transmission period of the first downlink reference signal is 2, the offset is 0, it is assumed that the duration pre-configured by the network device is one time slot, and the time unit is a symbol, that is, the network device transmits the first downlink reference signal every 2 symbols in one time slot. For example, one slot includes 6 symbols, symbol 0, symbol 1 …, symbol 5, and the network device sends the first downlink reference signal at symbol 0, symbol 2, and symbol 4.

It should be noted that the network device may send a plurality of different downlink reference signals within the preconfigured duration, for example: a first downlink reference signal, a second downlink reference signal, etc. 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. For example, the period for transmitting the first downlink reference signal and the period for transmitting 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.

1002. And the terminal equipment reports the effective duration of the downlink measurement result to the network equipment.

The downlink measurement result may be a result obtained by the terminal device measuring a downlink reference signal sent by the network device. Specifically, the downlink measurement result may include signal received energy obtained by the terminal device measuring the downlink reference signal. The received energy of the downlink reference signal may be characterized by parameters such as CQI, RSRP, SINR, and the like. Illustratively, the downlink measurement result includes the maximum CQI obtained by the terminal device measuring the downlink reference signal. Optionally, the terminal device may report the downlink measurement result to the network device. The signaling type of reporting the downlink measurement result and the signaling type of reporting the effective duration of the downlink measurement result may be the same or different, and the embodiment of the present application is not limited. 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 the embodiment of the present application is not limited.

In addition, when 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 effective duration of the downlink measurement result of the first time unit may be considered as the interval between the first time unit and the second time unit. It can be understood that, when the terminal device reports a downlink measurement result (e.g., 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. When the network device schedules the terminal device at or before the second time unit, the CQI is used to determine scheduling information for scheduling the terminal device, and a data channel is sent to the terminal device according to the scheduling information, so that the terminal device can receive the data channel using the second receiving port. 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 a time domain, such as: the length of one measurement unit may be a positive integer number of symbols, slots, subframes, etc. in the time domain, or a positive integer number of milliseconds (ms) or seconds(s) such as 0.5 ms, 1ms, 5ms, etc. in the time domain. In the embodiment of the present application, the positive integer may be an integer of 1 or more, for example, an integer of 1, 2, 3, or more.

It should be noted that the terminal device may determine whether downlink measurement results of different time units are related through the following two ways:

firstly, judging whether downlink measurement results of different time units are related or not according to signal receiving energy corresponding to the downlink measurement results.

Optionally, the terminal device determines an effective duration of the downlink measurement result according to the correlation threshold. The correlation threshold value may be pre-configured, or may be configured by the network device through signaling for the terminal device.

For example, if the correlation between the maximum signal received energy obtained by the terminal device in the first time unit and the maximum signal received energy obtained by the terminal device in the second time unit is greater than or equal to the correlation threshold, or the maximum signal received energy obtained by the terminal device in the first time unit and the deviation between the maximum signal received energies obtained by the terminal device in the second time unit are 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 correlated with the downlink measurement result of the terminal device in the second time unit, i.e., 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.

For example, the correlation threshold may be 90%, 99%, or other values. For example, if the maximum CQI obtained by the terminal device measuring the downlink reference signal in the time unit T0 is 9, 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%, which is equal to the correlation threshold, the effective duration of the CQI obtained by the terminal device in the time unit T0 is considered to be | T1-T0 |.

Optionally, the terminal device determines the effective duration of the downlink measurement result according to the deviation degree threshold. The threshold value of degree of deviation and the threshold value of degree of correlation may be pre-configured, or may be configured for the terminal device by the network device through signaling.

The deviation threshold may also be configured in advance, or may be configured by the network device for the terminal device through signaling, for example, the deviation threshold is 1%, 10%, or another value. Illustratively, the CQI value measured by the terminal device in time unit T0 is 10, allowing a degree of deviation of 10%, i.e., if the CQI value measured by the terminal device in time unit T1 is between 9 and 11, the measurement result of the terminal device in time unit T0 is considered to be valid in time unit T1.

And secondly, judging whether the downlink measurement results of different time units are related or not according to the channel matrix indicated by the downlink measurement results.

Optionally, 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 for the terminal device by the network device through signaling.

Optionally, the terminal device determines the effective duration of the downlink measurement result according to the channel matrix deviation degree threshold. The channel matrix deviation degree threshold may be pre-configured, or may be configured for the terminal device by the network device through signaling.

For example, if the degree of 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 degree of 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, the measurement result of the terminal device in the first time unit is considered to be 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 the interval between the first time unit and the second time unit.

Wherein the degree of 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 eigenvalue of the channel matrix, or may be a determinant of the channel matrix.

For example, assuming that the correlation threshold is 90% and the deviation threshold is 10%, the channel matrix indicated by the downlink measurement result of the terminal device in time unit T0 is matrix a, and the channel matrix indicated by the downlink measurement result of the terminal device in time unit T1 is matrix B. The maximum eigenvalue of the matrix A is 10, if the maximum eigenvalue of the matrix B is any one of values from 9 to 11, the deviation degree of the matrix A and the matrix B is considered to be less than 10%, and the correlation degree is more than 90%, it can be determined that the downlink measurement result of the terminal equipment in the time unit T0 is related to the downlink measurement result of the terminal equipment in the time unit T1, and the effective duration of the CQI obtained by the terminal equipment in the time unit T0 is | T1-T0 |.

Optionally, the terminal device may report the effective duration, and may report the time unit included in the effective duration. The valid duration includes X time units, where X is a number greater than or equal to 1. The starting time of the effective duration may be a time unit of the effective duration when the terminal device reports the downlink measurement result, or a time unit of the terminal device reporting the downlink measurement result, or a time unit of the terminal device obtaining the downlink measurement result. Illustratively, the CQI value obtained by the terminal device 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 for X symbols after the nth symbol.

Optionally, when the terminal device reports the effective duration, the effective duration of the downlink measurement result may be represented by a bit sequence with a length of Q. When the length of the bit sequence is qbit, different bit sequence values represent a particular length of time. For example, when Q is 2, 00 represents 5ms, 01 represents 10ms, 10 represents 15ms, and 11 represents 20 ms. Where Q may be a pre-configured fixed value.

It should be noted that the terminal device may carry the valid duration of the downlink measurement result in a physical layer signaling, for example, a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH). The effective duration of the downlink measurement result may also be carried on the RRC signaling. The report of the validity duration of the downlink measurement result may refer to the report of uplink control information in the protocol 38.212.

Optionally, the terminal device may periodically report the signaling carrying the effective duration according to the configuration of the network device. If the effective duration is carried by the physical layer signaling, the time unit for reporting the effective duration can be notified through the 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 network device informs the terminal device in which time unit to report the valid duration to the network device.

Optionally, the method shown in fig. 10 further includes: and the network equipment receives fourth information sent by the terminal equipment, wherein the fourth information is used for indicating that the terminal equipment has the 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 a capability of determining the valid duration of the downlink measurement result. Further, the network device may send the 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.

It should be noted that, when the network device does not determine whether the terminal device has the function of calculating the effective duration of the downlink measurement result, the terminal device may report its own capability information to the network device through the fourth information. Optionally, the network device may also instruct the terminal device to turn the function on or off. Therefore, the method can be better compatible with the existing terminal equipment which does not support the function, and the applicability of the method provided by the application is greatly improved.

Illustratively, the method shown in fig. 10 further includes: the network device sends fifth information to the terminal device, where the fifth information is used to enable the terminal device to determine an effective duration of a downlink measurement result, that is, the fifth information is used to instruct the terminal device to start a function of reporting the effective duration. Optionally, the five pieces of information may be used to instruct the terminal device to close the function of reporting the effective duration.

Optionally, the method shown in fig. 10 further includes: and the network equipment sends sixth information to the terminal equipment, wherein the sixth information is used for indicating the correlation threshold or the deviation threshold.

In a specific implementation, the network device may send the fifth information and the sixth information to the terminal device through one signaling, or may send the fifth information and the sixth information through two signaling, which is not limited in this embodiment of the present application.

Optionally, the method shown in fig. 10 further includes: and the network equipment schedules the terminal equipment according to the effective duration of the downlink measurement result.

Specifically, it can be considered that the channel condition indicated by the downlink measurement result is stable within the valid duration of the downlink measurement result. Thus, the network device can predict the channel conditions within the validity period. For example, it is assumed that the network device obtains the downlink measurement result (e.g., CQI) in time unit T2, and the content reported by the terminal device in step 1002 indicates that the validity duration of the downlink measurement result is Δ T. The network device may predict the channel condition within the time unit (T2+ Δ T) from the channel condition of the time unit T2, e.g., determine the scheduling information of the time unit (T2+ Δ T) from the scheduling information of the time unit T2. The scheduling information may be a transmission beam direction of the network device, a reception beam direction of the terminal device, a size of the scheduling data packet, a time-frequency resource of the scheduling data packet, a modulation mode, a code rate, and the like.

In the method provided by the application, 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 that the terminal device can be efficiently scheduled, interference can be reduced, and the transmission performance of a communication system can be improved.

It should be noted that the method shown in fig. 10 is also applicable to a communication system supporting a TDD communication scheme.

In the method provided by the embodiment of the application, the network device can continuously send the downlink reference signal 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. And the network device can determine the effective duration of the optimal pairing beam according to the effective duration of the measurement result. Under the scene that the terminal equipment is in high-speed motion, the network equipment uses the transmitting beam of the optimal matching beam to transmit signals within the effective duration of the optimal matching beam, and the terminal equipment uses the receiving beam of the optimal matching beam to receive signals, so that the receiving energy of the signals is highest, and the interference is minimum. And in the effective duration of the optimal pairing wave beam, the optimal pairing wave beam is used for channel prediction, and the terminal equipment is efficiently scheduled. And after the optimal matched beam fails, the optimal matched beam is determined again, so that the problem that the optimal matched beam which fails is used for transmitting and receiving signals is avoided, and the problem that the correct receiving rate of signal receiving is reduced due to the failure of the optimal matched beam is avoided.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of a network device, a terminal device, and interaction between the network device and the terminal device. In order to implement the functions in the method provided by the embodiments of the present application, the network device and the terminal device may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

Fig. 11 shows a schematic diagram of a possible structure of the communication device according to the above-described embodiment. The communication apparatus shown in fig. 11 may be the network device described in the embodiment of the present application, or may be a component in the network device that implements the foregoing method, or may be a chip applied to the network device. The chip may be a system on a chip (SOC) or a baseband chip having a communication function. As shown in fig. 11, the communication apparatus 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.

A processing unit 1101 to enable the communication apparatus to generate the first information, and/or other processes for the techniques described herein.

A communication unit 1102 for supporting communication between the communication apparatus and other communication apparatuses, such as supporting the communication apparatus to perform the functions of the network device in steps 501, 502, steps 801 to 805, steps 1001 to 1002, and/or other processes for the technology described herein in the above embodiments. The processing unit 1101 may transmit and receive information using the communication unit 1102.

It should be noted that all relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

Fig. 12 shows a schematic diagram of a possible structure of the communication device according to the above embodiment. The communication apparatus shown in fig. 12 may be the terminal device described in the embodiment of the present application, or may be a component in the terminal device, which implements the method described above, or may be a chip applied to the terminal device. The chip may be a system on a chip (SOC) or a baseband chip having a communication function. As shown in fig. 12, the communication apparatus 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.

A processing unit 1201 for enabling the communication apparatus to generate the second information, and/or other processes for the techniques described herein.

A communication unit 1202, configured to support communication between the communication apparatus and other communication apparatuses, such as supporting the communication apparatus to perform the functions of the terminal device in steps 501, 502, steps 801 to 804, steps 1001 to 1004, and/or other processes for the technology described herein in the foregoing embodiments. The processing unit 1201 may send and receive information using the communication unit 1202.

The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

The method provided by the embodiment of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a user device, or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., an SSD), among others.

In the embodiments of the present application, the embodiments may refer to each other, for example, methods and/or terms between the embodiments of the method may refer to each other, for example, functions and/or terms between the embodiments of the apparatus and the embodiments of the method may refer to each other, without logical contradiction.

Various modifications and alterations to this application may occur to those skilled in the art without departing from the scope of this application. Thus, if such modifications and variations of the present application fall within the scope of the method provided by the embodiments of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims

1. A method for reference signal measurement, comprising:

sending first information to a terminal device, where the first information is used to indicate a first measurement unit, N receiving ports of the terminal device, and a downlink reference signal received by the terminal device through each of the N receiving ports in the first measurement unit, where N is an integer greater than or equal to 1;

and receiving second information from the terminal equipment, wherein the second information is used for indicating a downlink measurement result of the first measurement unit.

2. The method of claim 1, further comprising:

receiving port capability information from the terminal device, the port capability information indicating Q port groups of the terminal device, each of the Q port groups including one or more ports; the ports in each port group support simultaneous receiving and/or sending, time division receiving and/or sending is supported among different port groups, and Q is an integer greater than or equal to 1.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

and sending M downlink reference signals to the terminal equipment through M sending ports in the first measurement unit, wherein the M downlink reference signals are in one-to-one correspondence with the M sending ports, and M is an integer greater than or equal to 1.

4. The method according to any of claims 1-3, wherein the second information is used for indicating downlink measurement results of the first measurement unit, and comprises:

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 to one, and one target downlink reference signal identifier in the N target downlink reference signal identifiers is an identifier of a target downlink reference signal with an optimal measurement result on the corresponding receiving port.

5. The method according to any of claims 1-4, wherein the second information is further used to indicate N Channel Quality Indication (CQI) s, the N CQI s corresponding to the N receiving ports one-to-one, and one of the N CQI is a CQI measured on its corresponding receiving port.

6. A method for reference signal measurement, comprising:

receiving first information from a network device, where the first information is used to indicate a first measurement unit, N receiving ports of a terminal device, and a downlink reference signal for the terminal device to receive at the first measurement unit through each of the N receiving ports, where N is an integer greater than or equal to 1;

and sending second information to the network equipment, wherein the second information is used for indicating a downlink measurement result of the first measurement unit.

7. The method of claim 6, further comprising:

sending and receiving port capability information to the network device, wherein the port capability information is used for indicating Q port groups of the terminal device, and each port group in the Q port groups comprises one or more ports; the ports in each port group support simultaneous receiving and/or sending, time division receiving and/or sending is supported among different port groups, and Q is an integer greater than or equal to 1.

8. The method according to claim 6 or 7, characterized in that the method further comprises:

receiving, in the first measurement unit, M downlink reference signals from the network device through the N receive ports; wherein M is an integer greater than or equal to 1.

9. The method according to any of claims 6 to 8, wherein the second information is used for indicating a downlink measurement result of the first measurement unit, and comprises:

10. The method according to any of claims 6-9, wherein the second information is further used to indicate N channel quality indication CQIs, the N CQIs corresponding to the N receiving ports one-to-one, and one of the N CQIs is measured on its corresponding receiving port.

11. A communication device, characterized in that it is adapted to implement the reference signal measurement method of any of claims 1-10.

12. A communications device comprising at least one processor and a memory, the at least one processor coupled to the memory, the at least one processor configured to implement the reference signal measurement method of any one of claims 1-10.