WO2021097679A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2021097679A1
WO2021097679A1 PCT/CN2019/119503 CN2019119503W WO2021097679A1 WO 2021097679 A1 WO2021097679 A1 WO 2021097679A1 CN 2019119503 W CN2019119503 W CN 2019119503W WO 2021097679 A1 WO2021097679 A1 WO 2021097679A1
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WIPO (PCT)
Prior art keywords
time unit
pilot signal
terminal
network device
sub
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PCT/CN2019/119503
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English (en)
Chinese (zh)
Inventor
王婷
黄逸
张瑞
周国华
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201980102034.2A priority Critical patent/CN114642017A/zh
Priority to PCT/CN2019/119503 priority patent/WO2021097679A1/fr
Publication of WO2021097679A1 publication Critical patent/WO2021097679A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering

Definitions

  • This application relates to the field of wireless communication technology, and in particular to a communication method and device.
  • the base station can use the transmit beam to transmit signals to the terminal.
  • the transmission beam used by the base station to send a signal to the terminal is determined by the base station according to the pilot signal sent by the terminal, or determined by the base station according to feedback information of the terminal.
  • This technical solution is generally applicable to terminals that move at low speeds in a non-line of sight (NLOS) environment, such as mobile phones, tablet computers, and so on.
  • NLOS non-line of sight
  • a terminal moving at high speed in a line of sight (LOS) environment such as an unmanned aerial vehicle (UAV) flying in the air
  • UAV unmanned aerial vehicle
  • the present application provides a communication method and device, which help improve the reliability of signals received by a terminal moving at a high speed in a LOS environment, and improve communication performance.
  • an embodiment of the present application provides a communication method, which specifically includes: receiving a first pilot signal group from a first terminal in a first time unit, and receiving a second pilot signal group from the first terminal in a second time unit. Pilot signal group; then, send the first signal to the first terminal, where the transmission beam of the first signal is determined according to the first pilot signal group and the second pilot signal group, the first time unit and the second time The unit is different.
  • the network device can determine the transmission beam used to send the first signal to the terminal according to the two sets of pilot signals sent by the first terminal, and the two sets of pilot signals are the units of the terminal at different time. Sent on. This helps to increase the possibility of alignment between the transmission beam of the base station and the reception beam of the terminal, thereby improving the reliability of the terminal receiving the signal sent by the network device, and improving the communication performance.
  • first indication information is sent to the first terminal, where the first indication information is used to instruct the first terminal to send the first pilot signal group and the second pilot signal group.
  • the first indication information is sent to the first terminal.
  • the signal received power from the first terminal refers to the received power of the signal from the first terminal received by the network device.
  • the first terminal When the signal received power from the first terminal is less than or equal to the first threshold, the first terminal may also have poor reception performance of the network device signal. Therefore, in this case, the first terminal is triggered to send two sets of pilots Signal, readjust the sending beam for sending the signal to the first terminal, which helps to improve the reliability of the first terminal to receive the signal from the network device.
  • the transmission beam of the first signal is determined according to the first angle of arrival and the second angle of arrival, the first angle of arrival is determined according to the first pilot signal group, and the second angle of arrival is determined according to the second pilot signal group.
  • the signal group is determined; wherein, the first angle of arrival is the angle of arrival between the first terminal and the network device in the first time unit, and the second angle of arrival is the angle of arrival between the second terminal and the network device in the second time unit The angle of arrival.
  • the transmission beam of the first signal can be determined based on the angle of arrival between the first terminal and the network device in the first time unit and the angle of arrival between the first terminal and the network device in the second time unit, which can improve
  • the accuracy of the transmission beam of the signal sent by the network device to the first terminal improves the reliability of the signal communicated between the network device and the first terminal, and also helps simplify the implementation.
  • the first time unit includes a first sub-time unit and a second sub-time unit, and the first pilot signal group includes a first pilot signal and a second pilot signal;
  • the time unit receives the first pilot signal from the first terminal, and the second sub-time unit receives the second pilot signal from the first terminal.
  • the time interval between the first position in the first sub-time unit and the second position in the second sub-time unit is the first time interval.
  • the first pilot signal group and the second pilot signal group may include multiple pilot signals. This solution can meet the scenario where the first terminal has multiple transmitting beams and/or the network device has multiple receiving beams, improving the network The accuracy of the sending beam of the signal sent by the device to the first terminal improves the reliability of the signal communicated between the network device and the first terminal.
  • the second indication information is sent to the first terminal, and the second indication information is used to indicate the time between the first position in the first sub-time unit and the second position in the second sub-time unit interval.
  • determining the time interval between the first sub-time unit and the second sub-time unit through the second indication information can flexibly determine the transmission time of the pilot signal, improve flexibility, and further reduce the overhead of the pilot signal. Communication performance.
  • the LOS path of the first pilot signal is the first LOS path; the angle of arrival of the first LOS path is the angle of arrival between the first terminal and the network device in the second sub-time unit;
  • the first sub-time unit receives the second signal from the second terminal;
  • the LOS path of the second signal is the second LOS path; when the second LOS path is different from the first LOS, the second signal is eliminated.
  • the signal reception strength of the second signal is greater than or equal to the second threshold.
  • the second sub-time unit and the first sub-time unit are two consecutive sub-time units in time; or,
  • the time interval between the second sub-time unit and the first sub-time unit is less than the coherence time of the channel; or,
  • the angle of arrival of the first pilot signal is the same as the angle of arrival of the second pilot signal; or,
  • the difference between the angle of arrival of the first pilot signal and the angle of arrival of the second pilot signal is less than or equal to the third threshold
  • the angle of arrival of the first pilot signal is the angle of arrival between the first sub-time unit, the first terminal and the network device;
  • the angle of arrival of the second pilot signal is the angle of arrival between the second sub-time unit, the first terminal and the network device.
  • the undisturbed pilot signal on one of the two sub-time units can be used to determine the position on the other sub-time unit. Interfere the signal, and then eliminate the interference and improve the signal reception performance.
  • the first pilot signal from the first terminal is received through the first receiving beam in the first sub-time unit; the second pilot signal from the first terminal is received through the second receiving beam in the second sub-time unit. Pilot signal.
  • first receiving beam and the second receiving beam are the same, or the first receiving beam and the second receiving beam are different.
  • the first pilot signal group includes a third pilot signal
  • the second pilot signal group includes a fourth pilot signal
  • the second indication information is sent to the first terminal, and the second indication information is used to indicate that the time interval between the first position of the first time unit and the second position of the second time unit is second time interval. It is convenient for the first terminal to determine the first time unit for sending the first pilot signal group and the second time unit for sending the second pilot signal group. Compared with the predefined method, the pilot signal group can be sent more flexibly and efficiently.
  • the second time interval is determined according to the moving speed of the first terminal. It helps to improve the reliability of the transmission beam of the first signal determined according to the first pilot signal group and the second pilot signal group. In addition, determining the second time interval based on the moving speed may consider different scenarios to select a suitable second time interval, which can further reduce the pilot overhead.
  • an embodiment of the present application provides a communication method, which specifically includes:
  • the first pilot signal group is sent to the network device in the first time unit, and the second pilot signal group is sent to the network device in the second time unit; the signal sent by the transmission beam from the network device is received, and the transmission beam is based on The first pilot signal group and the second pilot signal group are determined.
  • the first time unit is different from the second time unit.
  • the terminal since the terminal can send the first pilot signal group to the network device in the first time unit, and send the second pilot signal group to the network device in the second time unit, the network device can be enabled according to the first pilot signal group.
  • the frequency signal group and the second pilot signal group determine the transmission beam used to transmit signals to the terminal. This helps to increase the possibility of alignment between the transmission beam of the base station and the reception beam of the terminal, thereby improving the reliability of the terminal receiving the signal sent by the network device, and improving the communication performance.
  • the first indication information is received from the network device, and the first indication information is used to instruct the terminal to send the first pilot signal group and the second pilot signal group.
  • the first indication information is used to instruct the terminal to send the first pilot signal group and the second pilot signal group.
  • the timer is started to start timing; if the pilot signal is not sent to the network device before the timer expires, after the timer expires , Sending the first pilot signal group to the network device in the first time unit, and sending the second pilot signal group to the network device in the second time unit.
  • the timing duration of the timer may be predefined, or may be instructed by the network device, or may be determined by the terminal according to a certain algorithm or strategy, which is not limited. Specifically, the timing duration of the timer can be understood as: the duration between the end time of the timer and the start time of the timer. Help reduce the overhead of pilot signals and further improve communication performance. In addition, it can avoid the problem of poor beam tracking performance if the pilot signal is not sent for a long time, which will lead to poor communication performance.
  • the first time unit includes a first sub-time unit and a second sub-time unit
  • the first pilot signal group includes a first pilot signal and a second pilot signal
  • the time unit sends the first pilot signal to the network device, and sends the second pilot signal to the network device in the second sub-time unit.
  • the first pilot signal group and the second pilot signal group may include multiple pilot signals. This solution can meet the scenario where the first terminal has multiple transmitting beams and/or the network device has multiple receiving beams, improving the network The accuracy of the sending beam of the signal sent by the device to the first terminal improves the reliability of the signal communicated between the network device and the first terminal.
  • the time interval between the first sub-time unit and the second sub-time unit is the first time interval.
  • the first pilot signal is sent to the network device through the first transmission beam in the first sub-time unit; the second pilot signal is sent to the network device through the second transmission beam in the second sub-time unit.
  • the first pilot signal group includes the third pilot signal; the second pilot signal group includes the fourth pilot signal.
  • the receiving network device sends the second indication information, and the second indication information is used to indicate that the time interval between the first position of the first time unit and the second position of the second time unit is the second time interval.
  • determining the time interval between the first sub-time unit and the second sub-time unit through the second indication information can flexibly determine the transmission time of the pilot signal, improve flexibility, and further reduce the overhead of the pilot signal. Communication performance. It is convenient for the first terminal to determine the first time unit for sending the first pilot signal group and the second time unit for sending the second pilot signal group. Compared with the predefined method, the pilot signal group can be sent more flexibly and efficiently.
  • the second time interval is determined according to the moving speed of the terminal. It helps to improve the reliability of the transmission beam of the first signal determined according to the first pilot signal group and the second pilot signal group. In addition, determining the second time interval based on the moving speed may consider different scenarios to select a suitable second time interval, which can further reduce the pilot overhead.
  • an embodiment of the present application provides an interference cancellation method, which specifically includes: receiving a signal in a first time unit, where the signal includes a first signal component and a second signal component; when the second signal component arrives When the angle satisfies the first condition, the second signal component is eliminated.
  • the signal reception strength of the second signal component is greater than or equal to the first threshold.
  • the arrival angle of the second signal component can meet the first condition in the following manner:
  • the angle of arrival of the second signal component is greater than or equal to the second threshold; or,
  • the angle of arrival of the second signal component is within the first range; or,
  • the angle of arrival of the second signal is the angle of arrival of the signal sent by the air terminal; or,
  • the angle of arrival of the second signal component is not the angle of arrival of the signal sent by the ground terminal.
  • an embodiment of the present application also provides an interference cancellation method, which specifically includes:
  • the first signal is received in the first time unit; wherein, the first signal includes a first signal component and a second signal component; when the second LOS path is different from the first LOS path, the second signal is eliminated Signal component.
  • the angle of arrival of the first LOS path is the angle of arrival of the second signal received in the second time unit; the LOS path of the second signal component is the second LOS path.
  • the arrival angle 1 is different from the arrival angle 2, or the difference between the arrival angle 1 and the arrival angle 2 is not within the error range.
  • the angle of arrival 1 is the angle of arrival of the first LOS path, that is, the angle of arrival of the second signal received in the second time unit, that is, the angle of arrival between the first terminal and the network device in the second time unit;
  • Angle 2 is the arrival angle of the second LOS path, that is, the arrival angle between the second terminal and the network device in the first time unit.
  • the LOS of the first signal component is the first LOS path. It can be understood that the arrival angle 3 is the same as the arrival angle 1, or the difference between the arrival angle 3 and the arrival angle 1 is within the error range.
  • the angle of arrival 3 is the angle of arrival of the first signal component, that is, the angle of arrival between the first terminal and the network device in the first time unit.
  • the signal component of the received signal whose LOS is not the first LOS path can be eliminated, it is helpful to eliminate interference from other terminals in the LOS environment.
  • the signal reception intensity of the second signal component is greater than or equal to the first threshold.
  • the first LOS path is determined according to the second signal.
  • the second time unit and the first time unit are two consecutive time units in time; or,
  • the time interval between the second time unit and the first time unit is less than the coherence time of the channel; or,
  • the angle of arrival of the first signal component is the same as the angle of arrival of the second signal; or,
  • the difference between the angle of arrival of the first signal component and the angle of arrival of the second signal is less than or equal to a second threshold
  • the angle of arrival of the first signal component is the angle of arrival between the first terminal and the network device in the first time unit;
  • the angle of arrival of the second signal is the angle of arrival of the first terminal in the second time unit The angle of arrival with the network device.
  • the interference signal on the other time unit can be determined based on the undisturbed pilot signal on one time unit of the two time units, and then Eliminate interference and improve signal reception performance.
  • an embodiment of the present application provides a device, the device includes a processor, and is configured to implement the methods described in each of the foregoing aspects.
  • the device may also include a memory for storing instructions and data.
  • the memory is coupled with the processor, and when the processor executes the program instructions stored in the memory, the above aspects and any possible design description method for each aspect can be implemented.
  • the device may also include a communication interface, which is used for the device to communicate with other devices.
  • the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface, and other devices may be Network equipment or terminal equipment, etc.
  • the device includes:
  • Memory used to store program instructions
  • the processor is configured to call instructions stored in the memory, so that the device executes any possible design method of the first aspect and the first aspect of the embodiments of the present application, or causes the device to execute the second aspect of the embodiments of the present application The method of design.
  • the embodiments of the present application also provide a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute the foregoing aspects and any possible design method of each aspect.
  • an embodiment of the present application further provides a chip system.
  • the chip system includes a processor and may also include a memory, which is used to implement various aspects and any possible design method of each aspect.
  • the chip system can be composed of chips, or it can include chips and other discrete devices.
  • the embodiments of the present application also provide a computer program product, including instructions, which when run on a computer, cause the computer to execute each aspect and any possible design method of each aspect.
  • FIG. 1 is a schematic diagram of a time unit according to an embodiment of the application
  • FIG. 2 is a schematic diagram of a network architecture of a communication system according to an embodiment of the application.
  • FIG. 3 is a schematic flowchart of a communication method according to an embodiment of the application.
  • FIG. 4 is a schematic diagram of another time unit according to an embodiment of the application.
  • FIG. 5 is a schematic diagram of a position in a time unit according to an embodiment of the application.
  • FIG. 6 is a schematic diagram of a beam tracking process according to an embodiment of the application.
  • FIG. 7 is a schematic diagram of another time unit according to an embodiment of the application.
  • FIG. 8 is a schematic diagram of another beam tracking process according to an embodiment of the application.
  • FIG. 9 is a schematic diagram of another beam tracking process according to an embodiment of the application.
  • FIG. 10 is a schematic diagram of another beam tracking process according to an embodiment of the application.
  • FIG. 11 is a schematic diagram of a communication scenario according to an embodiment of the application.
  • FIG. 12 is a schematic flowchart of an interference cancellation method according to an embodiment of this application.
  • FIG. 13 is a schematic diagram of another communication scenario according to an embodiment of the application.
  • FIG. 14 is a schematic flowchart of another interference cancellation method according to an embodiment of this application.
  • FIG. 15 is a schematic structural diagram of a device according to an embodiment of the application.
  • FIG. 16 is a schematic structural diagram of another device according to an embodiment of the application.
  • At least one in the embodiments of the present application refers to one or more.
  • “Multiple” means two or more.
  • “And/or” describes the association relationship of the associated objects, indicating that there can be three types of relationships.
  • a and/or B can mean that A exists alone, A and B exist at the same time, and B exists alone. Among them, A and B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an “or” relationship.
  • “The following at least one (item)” or similar expressions refers to any combination of these items, including any combination of single item (item) or plural items (item).
  • At least one of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c.
  • each of a, b, and c can be an element itself, or a collection containing one or more elements.
  • transmission can include sending and/or receiving, and can be a noun or a verb.
  • an embodiment of the present application provides a communication method so that the network equipment can determine the signal to be sent to the terminal according to the two sets of pilot signals sent by the terminal.
  • the two sets of pilot signals are sent by the terminal in different time units. This helps to increase the possibility of alignment of the transmission beam of the base station with the reception beam of the terminal, thereby improving the reliability of the terminal receiving the signal sent by the network device, and improving the communication performance.
  • the LOS environment refers to a relatively stable and simple channel environment without obstructions.
  • signals may be transmitted through reflection, scattering, and diffraction.
  • the channel environment is relatively complex and unstable.
  • the relatively complex channel environment with obstacles is called the NLOS environment.
  • LOS can also be called line-of-sight, and NLOS can also be called non-line-of-sight.
  • the terminal is a device with a wireless transceiver function, which may be called a terminal device, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), and so on.
  • the terminal of the embodiment of the present application can move at a high speed in the LOS environment.
  • the high speed in the embodiment of the present application can be understood as the moving speed not less than a certain threshold.
  • the threshold may be 100 meters/second, 120 meters/second, etc., may be predefined through a communication protocol, or determined by the terminal according to a preset algorithm or rule, which is not limited.
  • the specific form of the terminal may be UAV, airborne terminal, airplane, high-speed rail, vehicle-mounted terminal, and so on.
  • UAV can be understood as a kind of aircraft that uses radio equipment to remote control or comes with its own program control.
  • the terminal can support at least one wireless communication technology, such as long term evolution (LTE), new radio (NR), future communication technology, and so on.
  • LTE long term evolution
  • NR new radio
  • the network device in the embodiment of the application is a device that provides a wireless access function for a terminal, and may also be referred to as an access network device, a radio access network (radio access network, RAN) device, and so on.
  • the network device may support at least one wireless communication technology, such as LTE, NR, and future communication technology.
  • the network equipment includes but is not limited to: next-generation base station (gNB), evolved node B (evolved node B, eNB), and wireless network in the fifth-generation mobile communication system (5th-generation, 5G) Controller (radio network controller, RNC), node B (node B, NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved node B) , Or home node B, HNB), baseband unit (BBU), transmitting and receiving point (TRP), transmitting point (TP), mobile switching center, small station, micro station, etc.
  • gNB next-generation base station
  • eNB evolved node B
  • 5G fifth-generation mobile communication system
  • 5G fifth-generation mobile communication system
  • RNC radio network controller
  • node B node B
  • BSC base station controller
  • BTS base transceiver station
  • home base station for example, home evolved node B) , Or home node B, HNB
  • BBU baseband unit
  • the network device can also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (CRAN) scenario, or the network device can They are relay stations, access points, in-vehicle devices, terminals, wearable devices, and network devices in future mobile communications or network devices in the future evolved public mobile land network (PLMN).
  • CU centralized unit
  • DU distributed unit
  • PLMN public mobile land network
  • the time unit in the embodiment of the present application refers to a period of time in the time domain, and may include one or more sub-time units.
  • the sub-time unit may be a basic time unit or an atomic time unit.
  • a basic time unit is usually composed of one or more atomic time units.
  • the communication between the terminal and the network device takes the basic time unit as a unit.
  • the basic time unit can be a radio frame, subframe, slot, micro-slot, mini-slot, or symbol, etc., but nothing is done. limited.
  • the atomic time unit may be a time unit with a smaller granularity than the specified basic time unit.
  • the atomic time unit can be a symbol.
  • the atomic time unit may be a time slot, a symbol, or the like.
  • the duration of different basic time units may be the same or different, which is not limited.
  • different subcarrier intervals correspond to basic time units of different durations. Take the time slot as the basic time unit as an example. For example, when the subcarrier interval is 15kHz, the duration of one time slot can be 1ms; when the subcarrier interval is 30kHz, the duration of one time slot can be 0.5ms.
  • a time unit is a basic time unit and includes one or more sub-time units.
  • the sub-time units are atomic time units.
  • taking the basic time unit as a time slot as an example, a time unit is a time slot, including 14 symbols.
  • the sub-time unit is a symbol.
  • one time unit may include multiple basic time units.
  • the sub-time unit may be a basic time unit or an atomic time unit.
  • taking the basic time unit as a radio frame as an example one time unit includes multiple radio frames, and one radio frame includes 10 subframes.
  • the sub-time unit is a radio frame or sub-frame.
  • one time unit includes multiple subframes, one subframe includes one or more time slots, and one time slot includes one or more symbols.
  • the sub-time unit is a sub-frame, or a time slot, or a symbol.
  • taking the basic time unit as a time slot as an example one time unit includes multiple time slots, and one time slot includes one or more symbols.
  • the sub-time unit is a time slot or symbol.
  • a basic time unit when a basic time unit is composed of an atomic time unit, for example, if a basic time unit is a symbol, then a time unit may include one or more symbols, and the sub-time unit is a symbol.
  • a basic time unit is a time slot, then a time unit may include one or more time slots, and the sub-time unit is a time slot.
  • a time slot is composed of multiple symbols, and the atomic time unit can be a symbol.
  • duration of different time units in the embodiments of the present application may be different or the same, which is not limited.
  • Pilot signal It may also be referred to as a reference signal (reference signal, RS).
  • the pilot signal can be used for channel sounding, channel measurement, cell selection, cell reselection, or open-loop power control.
  • the pilot signal can be a channel sounding reference signal (sounding reference signal, SRS), a demodulation reference signal (demodulation reference signal, DMRS), a channel state information reference signal (channel state information-reference signal, CSI-RS), tracking
  • the reference signal Tracking reference signal, TRS
  • TRS Track reference signal
  • the pilot signal carries information through the pilot sequence, that is, the pilot sequence is a part of the pilot signal, and the pilot sequences of different pilot signals are different.
  • pilot signal group is a group of pilot signals, and the group of pilot signals is carried on the same time unit.
  • a pilot signal group may include N pilot signals, and the value of N may be 1, or a positive integer greater than 1.
  • the value of N may be related to whether directional transmission or omnidirectional transmission is adopted between the terminal and the network device.
  • omni-directional transmission is used between the terminal and the network device, that is, the terminal sends the pilot signal omni-directionally, and the network device receives the pilot signal omni-directionally, then the value of N can be 1, that is, One pilot signal is carried on one time unit.
  • the terminal sends pilot signals in omnidirectional transmission, and the network equipment uses M different receiving beams to receive the pilot signals directionally, then the value of N can be less than or equal to M, for example, one time unit can carry M pilots signal.
  • the terminal uses K transmit beams to send pilot signals directionally, and the network equipment uses M different receive beams to receive pilot signals directionally, then the value of N can be less than or equal to M ⁇ K, for example, a time unit can carry M ⁇ K pilot signals.
  • the terminal uses K transmit beams to send pilot signals directionally, and the network equipment receives the pilot signals omnidirectionally, then the value of N can be less than or equal to K, for example, one time unit can carry K pilot signals .
  • M and K are positive integers.
  • the multiple pilot signals are usually carried on different sub-time units.
  • the pilot signal group i includes a pilot signal i1 and a pilot signal i2.
  • the pilot signal i1 is carried on the sub-time unit i1
  • the pilot signal i2 is carried on the sub-time unit i1.
  • sub-time unit i1 and sub-time unit i2 are two sub-time units included in time unit i.
  • the pilot sequences of different pilot signals belonging to a pilot signal group may be the same or different; or, the pilot sequences of pilot signals belonging to different pilot signal groups may be The same can also be different, which is not limited.
  • pilot sequence of the pilot signal may be determined by the terminal according to a certain algorithm or strategy, or may be notified to the terminal by the network device through signaling.
  • the terminal can randomly determine the pilot sequence of the pilot signal.
  • pilot signals carried on different time units in the embodiment of the present application may be the same or different, which is not limited.
  • the LOS path in the embodiments of the present application refers to a linear propagation path between the transmitting end and the receiving end of the wireless signal without obstruction in the LOS environment.
  • FIG. 2 it is a schematic diagram of a network architecture of a communication system according to an embodiment of the application, including network equipment and terminals.
  • the network device and the terminal can communicate through a licensed spectrum, or communicate through an unlicensed spectrum, and can also communicate through a licensed spectrum and an unlicensed spectrum at the same time.
  • the network device and the terminal can communicate through a frequency spectrum below 6 gigahertz (gigahertz, GHz), or communicate through a frequency spectrum above 6 GHz, or communicate using a frequency spectrum below 6 GHz and a frequency spectrum above 6 GHz at the same time. That is, this application is applicable to both low-frequency scenes (for example, sub 6G) and high-frequency scenes (above 6G).
  • the network architecture of the communication system shown in FIG. 2 is only an example, and does not limit the network architecture of the communication system in the embodiment of the present application.
  • the embodiments of the present application do not limit the number of network devices and the number of terminals in the communication system.
  • the communication system of the embodiment of the present application includes multiple network devices
  • the network device and the network device can communicate with each other.
  • the communication system includes multiple macro base stations and multiple micro base stations.
  • the macro base station and the macro base station, the micro base station and the micro base station, and the macro base station and the micro base station can perform multi-point coordinated communication.
  • sidelink communication may be performed between the terminals and the terminals.
  • the communication method in the embodiment of the present application is applicable to the above-mentioned multiple communication systems.
  • FIG. 3 a schematic diagram of a communication method provided in an embodiment of this application specifically includes the following steps.
  • Step 301 The first terminal sends a first pilot signal group to a network device in a first time unit.
  • the first terminal sends the first pilot signal group to the network device in the first time unit, which can be understood as: the first terminal carries the first pilot signal group on the first time unit Sent to the network device.
  • the position used to carry the first pilot signal in the first time unit may be predefined, or may be notified to the first terminal by the network device through signaling, which is not limited.
  • Step 302 The first terminal sends a second pilot signal group to the network device in a second time unit. Among them, the first time unit is different from the second time unit.
  • the first terminal when the first terminal sends the second pilot signal group to the network device in the second time unit, it can be understood that: the first terminal carries the second pilot signal group on the second time unit and sends it to the network device.
  • the position used to carry the second pilot signal in the second time unit may be predefined, or may be notified by the network device to the first terminal through signaling, which is not limited.
  • first time unit and the second time unit can refer to the above-mentioned relevant explanation of the time unit, which will not be repeated here.
  • the first time unit and the second time unit are different, which can be understood as: the time period carrying the first pilot signal group in the first time unit is different from the time period carrying the second pilot signal group in the second time unit. overlapping. It should be noted that for the first time unit and the second time unit, there may or may not be an overlapping part, which is not limited.
  • the first time unit includes a time period a1, a time period a2, and a time period a3
  • the second time unit includes a time period b1, a time period b2, and a time period b3.
  • time period a1 and time period a2 are time periods used to carry the first pilot signal group
  • time period b1 and time period b2 are time periods used to carry the second pilot signal group
  • time period a1 and time period a2 there is no overlap with the time period b1 and the time period b2, that is, the time period a1 and the time period a2 do not overlap with the time period b1 and the time period b2.
  • the time period a3 and the time period b3 may have overlapping parts or overlapping parts, that is, the time period a3 and the time period b3 may or may not overlap, which is not limited.
  • Step 303 The network device receives the first pilot signal group in the first time unit, receives the second pilot signal group in the second time unit, and sends the first signal to the first terminal.
  • the transmission beam of the first signal is determined according to the first pilot signal group and the second pilot signal group.
  • the network device determines the first angle of arrival according to the first pilot signal group; and determines the second angle of arrival according to the second pilot signal group. Then, the network device determines the transmission beam of the first signal according to the first angle of arrival and the second angle of arrival.
  • the first angle of arrival is the angle of arrival between the first time unit, the first terminal and the network device
  • the second angle of arrival is the angle of arrival between the second time unit, the first terminal and the network device.
  • the network device may determine the first angle of arrival according to the first pilot signal in the first pilot signal group; and determine the second angle of arrival according to the second pilot signal in the second pilot signal group. Then, the network device determines the angular velocity of the movement of the first terminal according to the first angle of arrival and the second angle of arrival, and then determines the precoding matrix according to the angular velocity of the movement of the first terminal. Finally, the first signal is multiplied by the precoding matrix to form a transmission beam of the first signal, so that the first terminal can send the first signal to the network device.
  • the first pilot signal may be the pilot signal with the highest signal received power or strength in the first pilot signal group.
  • the first pilot signal is the pilot signal included in the first pilot signal group.
  • the algorithm used in the embodiment of the present application to determine the angle of arrival based on the pilot signal may be a multi-signal classification (MUSIC) algorithm, a Root-MUSIC algorithm, or a signal parameter estimation based on rotation invariance technology (estimating signal parameters via rotational invariance techniques, ESPRIT) algorithms, etc., which are not limited.
  • the network device receives the first pilot signal on the symbol s1 in the first time unit, and receives the second pilot signal on the symbol s2 in the second time unit.
  • the angle of arrival between the first terminal and the network device at symbol s1 is the first angle of arrival
  • the angle of arrival between the first terminal and the network device at symbol s2 is the second angle of arrival.
  • the first arrival angle includes ⁇ (s1) and ⁇ (s1), where ⁇ (s1) is the horizontal angle between the first terminal of symbol s1 and the network device, and ⁇ (s1) is the first terminal of symbol s1
  • the second angle of arrival includes ⁇ (s2) and ⁇ (s2), where ⁇ (s2) is the horizontal angle between the first terminal and the network device in the symbol s2, ⁇ (s2) Is the vertical angle between the first terminal and the network device at symbol s2.
  • N s1 represents the sequence number of the symbol s1
  • N s2 represents the sequence number of the symbol s2
  • T s represents the duration of one symbol.
  • the horizontal angle ⁇ between the first terminal and the network device in the symbol s and the vertical angle ⁇ between the first terminal and the network device can be predicted, where ⁇ satisfies expression 3 and ⁇ satisfies the expression 4.
  • N s represents the sequence number of the symbol s. Among them, N s > N s2 > N s1 , that is, the symbol s is located after the symbol s2, and the symbol s2 is located after the symbol s1.
  • a( ⁇ , ⁇ ) is the steering vector
  • ⁇ d is the antenna spacing
  • ⁇ is the wavelength
  • M is the total number of horizontal antennas
  • N is the total number of vertical antennas. It can be understood that the total number of horizontal antennas is M, the total number of vertical antennas is N, and the antennas of the network equipment are M*N area arrays.
  • the precoding matrix w p at the symbol s is obtained, q .
  • the precoding matrix w p, q of the symbol s is used as the precoding matrix of the time unit where the symbol s is located.
  • the precoding matrix w p, q is multiplied by the first signal to form a transmission beam of the first signal.
  • the transmission beam of the first signal may also be determined by other methods.
  • the first terminal may periodically, and/or trigger by a timer, and/or trigger by an event to send the first pilot signal group and the second pilot signal group to the network device.
  • the first pilot signal group is carried on the first time unit
  • the second pilot signal group is carried on the second time unit. It is understandable that the first terminal sends the first pilot signal group and the second pilot signal group to the network device through a timer or event trigger, and periodically triggers the sending of the first pilot signal group and the second pilot signal group to the network device. Compared with the frequency signal group, it helps to reduce the signaling overhead.
  • a way of triggering the first terminal to send the first pilot signal and the second pilot signal to the network device through a timer is:
  • the first terminal After sending the pilot signal to the network device in the third time unit, the first terminal starts the timer to start counting. If the first terminal does not send the pilot signal to the network device before the timer expires, the first terminal sends the first pilot signal group and the second pilot signal group to the network device when the timer expires.
  • the timing duration of the timer is 10 seconds, or 20 seconds, etc., which may be predefined, or determined by the first terminal according to a certain algorithm, or may be instructed by the network device to the first terminal. limited.
  • the timing duration of a timer can be understood as: the duration between the start time of the timer and the end time of the timer.
  • the pilot transmission time can be understood as the start time of the timer.
  • the end time of the timer timing can be understood as the time at which the first terminal needs to send the pilot signal to the network device.
  • the third time unit is before the first time unit and the second time unit.
  • the event that triggers the first terminal to send the first pilot signal group and the second pilot signal group to the network device may be: the first terminal receives the first indication information from the network device.
  • the first indication information is used to instruct the first terminal to send the first pilot signal group and the second pilot signal group.
  • the network device sends the first instruction information to the first terminal.
  • the first terminal After receiving the first instruction information sent by the network device, the first terminal sends the first pilot signal group to the network device in the first time unit and the first terminal
  • the second time unit sends the second pilot signal group to the network device.
  • the network device may send the first indication information to the first terminal through an event trigger.
  • the network device may send the first indication information to the network device when detecting that the received power of the first signal is less than or equal to the first threshold.
  • the first signal received power is the received power of the signal from the first terminal received by the network device.
  • the first threshold may be XdB, and X may be a real number or an integer.
  • the network device When the first signal received power is less than or equal to the first threshold, for the network device, the signal received power of the first terminal is low, which may be caused by the misalignment of the network device's transmit beam and the first terminal's receive beam Therefore, when the network device detects that the received power of the first signal is less than or equal to the first threshold, it sends the first indication information to the first terminal, triggering the first terminal to send the first pilot signal group and the second pilot signal group, thereby It is helpful for the network device to perform beam tracking according to the first pilot signal group and the second pilot signal group, obtain more accurate beam information, and improve the communication performance between the network device and the first terminal.
  • the network device may also send the first indication information to the first terminal after it has not received the signal sent by the first terminal for a certain period of time.
  • the duration can be 1 minute, 30 seconds, and so on.
  • the network device may also send the first indication information to the first terminal when the packet loss rate or the bit error rate of the signal received from the first terminal exceeds a certain threshold.
  • the network device may carry the first indication information in a certain dynamic signaling (for example, downlink control information (DCI), or other physical layer signaling, etc.) and send it to the first terminal.
  • DCI downlink control information
  • the foregoing is only an example of triggering the network device to send the first indication information, and does not constitute a limitation to the embodiment of the present application.
  • the network device may also trigger the sending of the first indication information to the first terminal in other ways. .
  • the event that triggers the first terminal to send the first pilot signal group and the second pilot signal group to the network device may also be: the first terminal detects the packet loss rate or the bit error rate of the signal received from the network device Exceed a certain threshold. For example, the first terminal detects that the packet loss rate of the signal received from the network device in the fourth time unit is greater than or equal to the threshold A, and sends the first pilot signal group to the network device in the first time unit, and in the second time unit Send the second pilot signal group to the network device. It should be noted that the fourth time unit is before the first time unit and the second time unit.
  • the event that triggers the first terminal to send the first pilot signal group and the second pilot signal group to the network device may also be: the first terminal detects that the signal received power or intensity of the signal received from the network device is lower than A certain threshold. For example, the first terminal receives the second signal from the network device in the fifth time unit, and when the signal received power or intensity of the second signal is lower than the threshold B, sends the first pilot signal group to the network device in the first time unit , Sending the second pilot signal group to the network device in the second time unit.
  • the fifth time unit is before the first time unit and the second time unit.
  • first time unit and the second time unit may be discontinuous in time, and there is a time interval.
  • the time interval between the first time unit and the second time unit may be predefined, or may be indicated to the first terminal by the network device through signaling.
  • the network device sends second indication information to the first terminal.
  • the second indication information is used to indicate that the time interval between the first time unit and the second time unit is the first time interval.
  • the interval between the first time unit and the second time unit is referred to as the pilot interval below.
  • the pilot interval may be understood as: the time interval between the first position of the first time unit and the second position of the second time unit.
  • the first position may be the start position of the first time unit, the end position of the first time unit, or the middle position of the first time unit.
  • the second position may be the start position of the second time unit, the end position of the second time unit, or the middle position of the second time unit.
  • the start position of the first time unit is T11
  • the end position of the first time unit is T12
  • the middle position of the first time unit is T13
  • the start position of the second time unit is T21
  • the end position of the second time unit is T22
  • the middle position of the second time unit is T23.
  • the pilot interval is the time interval between the start position of the first time unit and the start position of the second time unit.
  • the pilot interval is the time interval between T11 and T21.
  • the pilot interval is the time interval between the end position of the first time unit and the start position of the second time unit.
  • the pilot interval is the time interval between T12 and T21.
  • the pilot interval is the time interval between the start position of the first time unit and the end position of the second time unit.
  • the pilot interval is the time interval between T11 and T22.
  • first position may also be the start position, or end position, or middle position of the Nth sub-time unit included in the first time unit.
  • second position please refer to the related introduction of the first position. No longer.
  • the unit of the pilot interval may be a time unit, or a sub-time unit, and may also be milliseconds (ms), seconds (s), etc., which is not limited.
  • the pilot interval may be N1 subframes, or M1 time slots, or P1 symbols, or x1 milliseconds, or y1 seconds, etc., where N1, M1, P1, x1, and y1 are integers greater than or equal to zero.
  • the pilot interval is determined according to the moving speed of the first terminal. Among them, the greater the moving speed of the first terminal, the smaller the pilot interval. This helps to increase the possibility that the network device determines that the transmission beam of the first signal is aligned with the reception beam of the first terminal.
  • the network device may be configured with multiple pilot intervals, and different pilot intervals correspond to different moving speed ranges.
  • the network device configures pilot interval 1, pilot interval 2, and pilot interval 3 for the first terminal.
  • the moving speed range corresponding to pilot interval 1 is moving speed range 1
  • the moving speed range corresponding to pilot interval 2 is moving speed range 2
  • the moving speed range corresponding to pilot interval 3 is moving speed range 3. If the moving speed of the first terminal is in the moving speed range 2, the first terminal sends the first pilot signal group and the second pilot signal group to the network device according to the pilot interval 2.
  • the network device may also configure multiple pilot intervals by configuring multiple pilot patterns, or pilot locations, or pilot resources.
  • the pilot interval may be determined by the first terminal according to its own moving speed, or may be determined by the network device according to the moving speed of the first terminal.
  • the moving speed of the first terminal may be determined by the network device according to the pilot signal or other signals sent by the first terminal, or may be reported by the first terminal, which is not limited.
  • Scenario 1 No beam scanning. That is, the first terminal sends pilot signals omnidirectionally, and the network equipment receives pilot signals omnidirectionally.
  • each of the aforementioned pilot signal groups may include one pilot signal, that is, one pilot signal is carried on one time unit. signal.
  • the first terminal sends a pilot signal in two time units respectively.
  • i is a positive integer greater than or equal to 1.
  • the first terminal sends the pilot signal i1 to the network device in time unit i1, and sends the pilot signal i2 to the network device in time unit i2.
  • the network device receives the pilot signal i1 in time unit i1.
  • the pilot signal i1 of a terminal receives the pilot signal i2 from the first terminal at the time unit i2.
  • the network device determines the transmission beam of the first signal according to the pilot signal i1 and the pilot signal i2.
  • the determined sending beam of the first signal is the optimal beam direction for the network device to send the signal to the first terminal, so that the reliability of the first terminal receiving the first signal sent by the network device can be improved, and the communication performance can be improved.
  • the time unit i1 can be understood as the first time unit shown in FIG. 4, and the time unit i2 can be understood as the second time unit shown in FIG.
  • the time interval between two time units carrying pilot signals may be the same or different.
  • the pilot signal in the m-th beam tracking process, is carried on the time unit m1 and time unit m2, respectively, and in the n-th beam tracking process, the pilot signal is carried on the time unit n1 and time unit n2, respectively.
  • the time interval M between the time unit m1 and the time unit m2, and the time interval N between the time unit n1 and the time unit n2 may be the same or different.
  • the time interval M and the time interval N are the same.
  • the acceleration of the first terminal is not 0, the time interval M and the time interval N are different.
  • the position of the pilot signal carried by the time unit m1 and the time unit m2, the time unit n1 and the time unit n2 can be the same or different; the time unit m1 and the time unit n1, the time unit m2 and the time unit n2 carry The position of the pilot signal can be the same or different.
  • Scenario 2 Beam scanning of multiple receiving beams on the network device side.
  • the network device may include Y receiving beams, but use V receiving beams to receive the pilot signal in a directional direction. Among them, V is less than or equal to Y.
  • the V receiving beams are determined by the network device from the Y receiving beams according to a certain algorithm or strategy.
  • the first terminal may send V pilot signals to the network device in one time unit, that is, one pilot signal group includes V pilot signals.
  • the network device can determine the optimal receiving beam from the V receiving beams according to the receiving conditions of the V pilot signals.
  • the network device may determine the sending beam for sending the first signal to the first terminal according to the determined optimal receiving beam.
  • the V pilot signals included in a pilot signal group may be the same or different.
  • the first terminal repeatedly sends V pilot signals to the network device at different moments in a time unit.
  • V is the number of receiving beams used by the network device to directionally receive the pilot signal, which may be predefined or notified by the network device to the first terminal through signaling, which is not limited.
  • the receiving beam used by the network device to directionally receive the pilot signal may be an analog beam, a digital beam, or a hybrid beam (ie, a beam where an analog beam and a digital beam are mixed), which is not limited.
  • the first terminal sends a group of pilot signals to the network device at different moments in a time unit.
  • the first time unit includes V sub-time units.
  • the first terminal can send pilot signals to the network device on the V sub-time units.
  • the network device can use different receiving beams for the V time units. Pilot signal from the first terminal.
  • the use of the V sub-time units in the first time unit by the first terminal may be determined according to a certain algorithm or strategy, or may be instructed by the network device, or may be predefined, which is not limited.
  • the network equipment In a beam tracking process, the network equipment usually uses the same receiving beam to receive the pilot signals in two time units that carry two sets of pilot signals. Take the i-th beam tracking process as an example. For example, in the i-th beam tracking process, on the time unit i1 and the time unit i2, the same receiving beam is usually used to receive the pilot signal. For example, the time unit i1 and the time unit i2 use the same receiving beam to receive the pilot signal sub-time units corresponding to each other. For the corresponding understanding here, please refer to the following description of the embodiment in FIG. 7.
  • the time unit i1 is the time unit that carries a group of pilot signals in the i-th beam tracking process, which can be understood as the above-mentioned first time unit
  • the time unit i2 is the time unit that carries another group in the i-th beam tracking process.
  • the time unit of the pilot signal can be understood as the above-mentioned second time unit.
  • the time unit i1 includes a sub-time unit i11, a sub-time unit i12, and a sub-time unit i13
  • the time unit i2 includes a sub-time unit i21, a sub-time unit i22, and a sub-time unit i23.
  • the sub-time unit i11 corresponds to the sub-time unit i21
  • the sub-time unit i12 corresponds to the sub-time unit i22
  • the sub-time unit i13 corresponds to the sub-time unit i23.
  • the receiving beam used by the network device to receive the pilot signal in the sub-time unit i11 and the sub-time unit i21 is the same, and the receiving beam used to receive the pilot signal in the sub-time unit i12 and the sub-time unit i22 is the same.
  • the receiving beams used by the time unit i13 and the sub-time unit i23 to receive the pilot signal are the same.
  • the position of the sub-time unit i11 relative to the time unit i1 and the position of the sub-time unit i21 relative to the time unit i2 can be the same or different.
  • the duration of the sub-time unit 11 and the duration of the sub-time unit 21 may be the same or different.
  • the receiving beams used by the network devices may be the same or different.
  • the network device uses the receiving beam 1, the receiving beam 2 and the receiving beam 3 in the m-th beam tracking process and the n-th beam tracking process.
  • the time unit m1 includes sub-time units m11, m12, and m13
  • the time unit m2 includes sub-time units m21, m22, and m23.
  • the sub-time unit m11 corresponds to m21
  • m12 corresponds to m22.
  • m13 corresponds to m23, namely:
  • the first terminal sends the pilot signal to the network device in the sub-time unit m11.
  • the network device uses the receiving beam 1 in the sub-time unit m11 to receive the pilot signal from the first terminal; the first terminal sends the pilot signal to the network in the sub-time unit m12.
  • the device sends a pilot signal.
  • the network device uses the receiving beam 2 to receive the pilot signal from the first terminal in the sub-time unit m12; the first terminal sends the pilot signal to the network device in the sub-time unit m13.
  • the network The device uses the receiving beam 3 to receive the pilot signal from the first terminal in the sub-time unit m13.
  • the first terminal sends the pilot signal to the network device in the sub-time unit m21.
  • the network device uses the receiving beam 1 in the sub-time unit m21 to receive the pilot signal from the first terminal; the first terminal sends the pilot signal to the network in the sub-time unit m22.
  • the device sends a pilot signal.
  • the network device uses the receiving beam 2 to receive the pilot signal from the first terminal in the sub-time unit m22; the first terminal sends the pilot signal to the network device in the sub-time unit m23.
  • the network The device uses the receiving beam 3 to receive the pilot signal from the first terminal in the sub-time unit n23.
  • the network device determines the pilot signal with the maximum signal received power or strength according to the pilot signals received in the sub-time unit m11, the sub-time unit m12, and the sub-time unit m13.
  • the network device determines the pilot signal with the maximum signal received power or strength according to the pilot signals received in the sub-time unit m21, the sub-time unit m22, and the sub-time unit m23.
  • the network device determines the transmission beam of the first signal according to the pilot signal with the highest signal received power or strength in the time unit m2 and the pilot signal with the highest signal received power or strength in the time unit m1.
  • the signal received power or the strongest pilot signal on the time unit m1 can be received by the network equipment using the same receiving beam, or can be received by different receivers. Received by the beam.
  • the network device determines the transmission beam of the first signal in the n-th beam tracking process
  • Scenario 3 Beam scanning with multiple transmission beams on the terminal side.
  • the first terminal may include X transmit beams, but uses U transmit beams to transmit the pilot signal in a directional manner. Among them, U is less than or equal to X.
  • the first terminal may send U pilot signals to the network device in one time unit, that is, one pilot signal group includes U pilot signals.
  • the network device can determine the optimal transmission beam from the U transmission beams according to the reception conditions of the U pilot signals, and then notify the first terminal of the determined optimal transmission beam.
  • the network device may determine the sending beam for sending the first signal to the first terminal according to the determined optimal sending beam.
  • U pilot signals included in a pilot signal group may be the same or different.
  • the first terminal repeatedly sends U pilot signals to the network device at different times in a time unit.
  • U is the number of transmission beams used by the first terminal to send the pilot signal directionally, which may be predefined, or notified by the network device to the first terminal through signaling, or the first terminal according to The actual situation is determined based on a certain algorithm or rule, and there is no restriction on this.
  • the transmission beam used by the first terminal for directional transmission of the pilot signal may be an analog beam, a digital beam, or a hybrid beam (ie, a beam where the analog beam and the digital beam are mixed), which is not limited. .
  • the first terminal uses one transmission beam to send the pilot signal to the network device at different moments in the first time unit.
  • the first time unit includes U sub-time units, and the first terminal may respectively use one transmission beam on the U sub-time units to send the pilot signal to the network device.
  • the network device may receive pilot signals from different transmission beams of the first terminal.
  • the use of the U sub-time units in the first time unit by the first terminal may be determined according to a certain algorithm or strategy, may also be instructed by the network device, or may be predefined, which is not limited.
  • the first terminal usually uses the same transmit beam to receive the pilot signal in a time unit that carries two sets of pilot signals.
  • the same transmitting beam is usually used to transmit the pilot signal.
  • the time unit i1 and the time unit i2 use the same transmission beam to send the pilot signal sub-time units corresponding to each other.
  • the time unit i1 is the time unit that carries a group of pilot signals in the i-th beam tracking process, which can be understood as the above-mentioned first time unit
  • the time unit i2 is the time unit that carries another group in the i-th beam tracking process.
  • the time unit of the pilot signal can be understood as the above-mentioned second time unit.
  • the number of sub-time units included in the time unit i1 is the same as the number of sub-time units included in the time unit i2.
  • the sub-time unit i11 corresponds to the sub-time unit i21
  • the sub-time unit i12 corresponds to the sub-time unit i22
  • the sub-time unit i13 corresponds to the sub-time unit i23. That is, the first terminal uses the same transmission beam to transmit the pilot signal in the sub-time unit i11 and the sub-time unit i21, and uses the same transmission beam to transmit the pilot signal in the sub-time unit i12 and the sub-time unit i22.
  • the transmission beams used by the sub-time unit i13 and the sub-time unit i23 to transmit the pilot signal are the same.
  • the transmitting beams used by the first terminal may be the same or different.
  • the first terminal uses transmit beam 1, transmit beam 2 and transmit beam 3 in the m-th beam tracking process and the n-th beam tracking process.
  • the time unit m1 includes sub-time units m11, m12, and m13
  • the time unit m2 includes sub-time units m21, m22, and m23.
  • the sub-time unit m11 corresponds to m21
  • m12 corresponds to m22.
  • m13 corresponds to m23.
  • the first terminal uses transmit beam 1 to send the pilot signal in the sub-time unit m11.
  • the network device receives the pilot signal from the first terminal in the sub-time unit m11; the first terminal is in the sub-time unit m11.
  • the unit m12 uses the transmit beam 2 to send the pilot signal.
  • the network device receives the pilot signal from the first terminal in the sub-time unit m12; the first terminal uses the transmit beam 3 to send the pilot signal in the sub-time unit m13.
  • the network device receives the pilot signal from the first terminal in the sub-time unit m13.
  • the first terminal uses the transmit beam 1 to transmit the pilot signal in the sub-time unit m21.
  • the network device receives the pilot signal from the first terminal in the sub-time unit m21; the first terminal uses the transmit beam 2 to transmit in the sub-time unit m22.
  • the pilot signal corresponds to the pilot signal from the first terminal in the sub-time unit m22; the first terminal uses the transmit beam 3 to send the pilot signal in the sub-time unit m23.
  • the network device is in the sub-time unit. m23 receives the pilot signal from the first terminal.
  • the network device determines the pilot signal with the maximum signal received power or strength according to the pilot signals received in the sub-time unit m11, the sub-time unit m12, and the sub-time unit m13.
  • the network device determines the pilot signal with the maximum signal received power or strength according to the pilot signals received in the sub-time unit m21, the sub-time unit m22, and the sub-time unit m23.
  • the transmission beam of the first signal is determined according to the pilot signal with the highest signal received power or strength in the time unit m2 and the pilot signal with the highest signal received power or strength in the time unit m2. It should be noted that the signal received power or the strongest pilot signal on the time unit m1, and the signal received power or the strongest pilot signal on the time unit m1 may be transmitted by the first terminal using the same transmitting beam, or different Send beam sent.
  • the network device determines the transmission beam of the first signal in the n-th beam tracking process
  • Scenario 4 Beam scanning with multiple receiving beams on the network device side and multiple transmitting beams on the terminal side.
  • the first terminal may include X transmit beams
  • the network device may include Y receive beams.
  • the first terminal uses U transmit beam orientations to send pilot signals to the network device
  • the network device uses V receive beams to receive signals from the first terminal. Pilot signal of a terminal.
  • U is less than or equal to X
  • V is less than or equal to Y.
  • the first terminal can only use one transmit beam to send a signal to the network device at a time, and the network device can only use one receive beam to receive a signal at a time, for a pilot signal, it corresponds to one transmission of the first terminal.
  • a combination of a beam and a receiving beam of the network device, that is, one pilot signal corresponds to a beam combination, and the beam combination includes a transmitting beam of the first terminal and a receiving beam of the network device.
  • the transmit beam of the first terminal and the receive beam of the network device exist U ⁇ V beam combinations.
  • the number of pilot signals that the first terminal can send to the network device in a time unit is related to the number of beam combinations used. For example, if the first terminal uses the transmission beams corresponding to the Z beam combinations in the U ⁇ V beam combinations to send pilot signals, the number of pilot signals that can be sent to the network device in one time unit is Z.
  • the number of beam combinations may be predefined, or may be indicated to the first terminal by the network device through signaling, which is not limited.
  • the first terminal uses which beam combination of U ⁇ V beam combinations to send the pilot signal, which can be determined by the first terminal according to a certain algorithm or strategy, or it can be a network Instructed by the device to the terminal.
  • the beam combinations generally used for the two time units carrying the pilot signal group are the same. Taking the i-th beam tracking process as an example, the same beam combination is usually used in the time unit i1 and the time unit i2.
  • the time unit i1 is a time unit that carries a group of pilot signals
  • the time unit i2 is a time unit that carries another group of pilot signals.
  • the time unit i1 and the time unit i2 use the same beam combination sub-time units corresponding to each other.
  • the beam combinations used by the two time units carrying the pilot signal group may be different or the same.
  • the first terminal uses transmit beam 1, transmit beam 2 and transmit beam 3 to directionally send pilot signals
  • the network device uses receive beam 1, receive beam 2, and receive beam 3 to directionally receive pilot signals.
  • beam combination 1 includes transmitting beam 1 and receiving beam 1
  • beam combination 2 includes transmitting beam 2 and receiving beam 2
  • beam combination 3 includes transmitting beam 3 and receiving beam 3
  • beam combination 4 includes transmitting beam 1 and receiving beam 2.
  • Beam combination 5 includes transmit beam 2 and transmit beam 3
  • beam combination 6 includes transmit beam 1 and receive beam 3
  • beam combination 7 includes transmit beam 2 and receive beam 1
  • beam combination 8 includes transmit beam 3 and receive beam 1
  • beam combination 9 includes transmitting beam 3 and receiving beam 2.
  • the beam combinations used on the sub-time units of the time unit m1 and the time unit m2 are beam combination 1, beam combination 2 and beam combination 3, and in the nth beam tracking process ,
  • the beam combinations used on the sub-time units of the time unit n1 and the time unit n2 are beam combination 3, beam combination 4, and beam combination 5, respectively.
  • the beam combinations used in the sub-time units of the time unit n1 and the time unit n2 can also be beam combination 1, beam combination 2, and beam combination 3, respectively.
  • the beam combination used in the secondary beam tracking process is the same.
  • the time unit m1 includes sub-time units m11, m12, and m13
  • the time unit m2 includes sub-time units m21, m22, and m23.
  • the sub-time unit m11 corresponds to m21
  • m12 corresponds to m22
  • m13 corresponds to m23.
  • the first terminal uses the transmit beam 1 in the sub-time unit m11 to send the pilot signal to the network device
  • the network device uses the receive beam 1 in the sub-time unit m11 to receive the pilot signal from the first terminal
  • the terminal uses the transmit beam 2 to send the pilot signal to the network device in the sub-time unit m12.
  • the network device uses the receive beam 2 in the sub-time unit m12 to receive the pilot signal from the first terminal; the first terminal uses the sub-time unit m13
  • the transmitting beam 3 is used to send the pilot signal to the network device.
  • the network device uses the receiving beam 3 in the sub-time unit m13 to receive the pilot signal from the first terminal.
  • the first terminal uses the transmit beam 1 in the sub-time unit m21 to send the pilot signal.
  • the network device uses the receive beam 1 in the sub-time unit m21 to receive the pilot signal from the first terminal; the first terminal uses the sub-time unit m22 The transmitting beam 2 sends the pilot signal.
  • the network device uses the receiving beam 2 to receive the pilot signal from the first terminal in the sub-time unit m22; the first terminal uses the transmitting beam 3 to send the pilot signal in the sub-time unit m23, corresponding to Yes, the network device uses the receiving beam 3 in the sub-time unit m23 to receive the pilot signal from the first terminal.
  • the network device can determine the pilot signal with the highest signal reception strength or power from the pilot signals received by the sub-time unit m11, the sub-time unit m12, and the sub-time unit m13, and from the sub-time unit m21 and the sub-time unit m22 Among the pilot signals received by the sub-time unit m23, the pilot signal with the largest signal reception strength or power is determined. Then, the transmission beam of the first signal is determined according to the pilot signal with the highest signal reception strength or power received in the time unit m1 and the time unit m2, respectively. It should be noted that the beam combination used by the signal received power or the strongest pilot signal on the time unit m1 and the beam combination used by the signal received power or the strongest pilot signal on the time unit m2 may be the same or different.
  • a beam tracking process involved includes the first terminal separately sending a group of pilot signals in two time units.
  • the wireless signal can travel in a straight line between the terminal and the network device without obstruction.
  • terminal 1 sends a signal to network device 1
  • terminal 2 sends a signal to network device 2. Since terminal 1 and terminal 2 send signals at the same time, if network device 1 receives a signal from terminal 2, If the signal sent by terminal 1 is not orthogonal to the signal sent by terminal 2, the signal from terminal 2 will interfere with the network device 1 receiving the signal from terminal 1.
  • the embodiment of the present application also provides a method for interference cancellation, which can make the network device perform interference cancellation based on the LOS path and improve communication performance.
  • an interference cancellation method specifically includes the following steps.
  • Step 1201 The network device receives the first signal in time unit 1.
  • the first signal includes a first signal component and a second signal component.
  • Step 1202 When the LOS path 1 is different from the LOS path 2, the network device eliminates the second signal component.
  • the arrival angle of the LOS path 1 is the arrival angle 1.
  • the angle of arrival 1 is the angle of arrival between the time unit 2, the network device and the first terminal.
  • LOS path 2 is the LOS path of the second signal component.
  • the LOS path of the first signal component is LOS path 1.
  • the arrival angle 1 is different from the arrival angle 2, or the difference between the arrival angle 1 and the arrival angle 2 is not within the error range.
  • the angle of arrival 1 is the angle of arrival of the first LOS path, that is, the angle of arrival of the second signal received in the second time unit, that is, the angle of arrival between the first terminal and the network device in the second time unit;
  • Angle 2 is the arrival angle of the second LOS path, that is, the arrival angle between the second terminal and the network device in the first time unit.
  • the LOS of the first signal component is the first LOS path. It can be understood that the arrival angle 3 is the same as the arrival angle 1, or the difference between the arrival angle 3 and the arrival angle 1 is within the error range.
  • the angle of arrival 3 is the angle of arrival of the first signal component, that is, the angle of arrival between the first terminal and the network device in the first time unit.
  • the signal component of the received signal whose LOS is not the first LOS path can be eliminated, it is helpful to eliminate interference from other terminals in the LOS environment.
  • the angle of arrival 1 is determined by the network device according to the second signal sent by the first terminal.
  • the specific manner of determining the angle of arrival based on the signal refer to the foregoing implementation manner of determining the angle of arrival based on the pilot signal, which will not be repeated here.
  • the first signal component can be understood as a useful signal component.
  • the first signal component is a signal sent from the first terminal in time unit 1, which is a useful signal
  • the second signal component can be It is understood as an interference signal component
  • the second signal component is a signal sent from the second terminal in time unit 1, which is an interference signal.
  • the second terminal and the first terminal are different terminals.
  • the second signal can be understood as a useful signal.
  • the second signal is a signal sent from the first terminal in the time unit 2.
  • the network device receives the first signal in time unit 1 and receives the second signal in time unit 2.
  • the first signal includes a first pilot signal from the first terminal
  • the second signal includes a second pilot signal from the first terminal.
  • the network device can use the second signal Determine the arrival angle 1 and the LOS path 1 between the first terminal and the network device, and then identify the interference signal in the first signal according to the determined arrival angle 1 and the LOS path 1, so as to eliminate the interference signal.
  • the interfered signal refers to a signal including an interference signal component in the signal.
  • the first pilot signal sent by the first terminal in time unit 1 and the second pilot signal sent in time unit 2 may be determined by itself or instructed by a network device
  • the pilot sequences of the pilot signals sent on different time units have a relatively low probability of conflicting with the pilot signals sent by other terminals, so the network equipment can be based on receiving undisturbed pilot signals on time unit 1 and time unit 2.
  • the first terminal receives the third indication information of the network device, and the third indication information is used to instruct the first terminal to send the first pilot signal and the second pilot signal to the network device.
  • the first terminal sends the first pilot signal in time unit 1 and the second pilot signal in time unit 2 according to the third instruction information.
  • the network device can detect whether the received signal is an interfered signal through a spatially matched filter. For example, if the signal includes signal components from two or more LOS paths, the signal is the interfered signal. If the signal only includes signal components from one LOS path, the signal is an undisturbed signal.
  • the network device may detect whether the signal includes multiple signal components whose arrival angles satisfy the first condition through a spatial filter, and use the signal components whose arrival angles satisfy the first condition as the signal component from the LOS path 1.
  • the first condition may be predefined, or determined by the network device according to a certain algorithm or rule.
  • network devices are determined through machine learning.
  • a signal component whose arrival angle satisfies the first condition may mean that the arrival angle is within the first arrival angle range, or not within the second arrival angle range, or the arrival angle is greater than or equal to a certain threshold.
  • the angle of arrival that satisfies the first condition may be referred to as the angle of arrival between the air terminal and the network device, or the angle of arrival of the air terminal for short.
  • the angle of arrival that does not meet the first condition may be referred to as the angle of arrival between the ground terminal and the network device, referred to as the angle of arrival of the ground terminal.
  • the arrival angles of the signal components p, q included in the signal include a horizontal angle ⁇ p and a vertical angle ⁇ q , where the horizontal angle ⁇ p indicates the horizontal angle between the terminal sending the signal component p, q and the network device , The vertical angle ⁇ q indicates the angle in the vertical direction between the terminal sending the signal components p, q and the network device.
  • L ⁇ is the number of horizontal antennas
  • L ⁇ is the number of vertical antennas
  • Interfering signals include both interference signal components and useful signal components.
  • the signal received power T p,q If it is not 0, it is determined that the signal is not interfered with.
  • the signal component whose signal received power T p,q is not 0 and whose angle of arrival satisfies the first condition is the useful signal component, and the transmission path of the useful signal component is the LOS path.
  • the LOS path of the useful signal component is LOS path 1.
  • the angle of arrival For the signal component of the angle of arrival, use the angle of arrival as the first signal component with the LOS path being LOS path 1.
  • the signal transmitted on the channel satisfying Expression 9 in the first signal is taken as the signal component whose LOS path is LOS path 1, that is, the first signal component.
  • A [a( ⁇ 0 , ⁇ 0 ),a( ⁇ 1 , ⁇ 1 ),...,a( ⁇ L ⁇ -1 , ⁇ L ⁇ -1 )].
  • the time unit 1 and the time unit 2 are time-based Two consecutive time units.
  • time unit 1 and time unit 2 are two consecutive time units in time.
  • the time interval between time unit 1 and time unit 2 is less than the coherence time of the channel.
  • the time interval between the time unit 1 and the time unit 2 may satisfy: the arrival angle 2 and the arrival angle 1 are the same, or the difference between the arrival angle 2 and the arrival angle 1 is less than or equal to the threshold value 0.
  • the angle of arrival 1 is the angle of arrival between the time unit 2, the first terminal and the network device
  • the angle of arrival 2 is the angle of arrival between the time unit 1, the first terminal and the network device.
  • the angle of arrival 1 is the angle of arrival of the second signal from the first terminal received by the network device in time unit 2
  • the angle of arrival 2 is the signal from the first terminal received by the network device in time unit 1 (that is, the first The angle of arrival of the signal component).
  • the threshold 0 may be predefined or determined according to a certain algorithm or rule, which is not limited.
  • the time interval between the time unit 1 and the time unit 2 can refer to the above-mentioned related introduction of the time interval between the first time unit and the second time unit, which will not be repeated here.
  • the time interval between time unit 1 and time unit 2 may be predefined, or the time interval is notified to the first terminal by the network device through signaling, or determined by the network device according to the moving speed of the first terminal.
  • the embodiment of the present application does not limit the manner of determining the time interval between the time unit 1 and the time unit 2.
  • the signal reception intensity or power of the second signal component is greater than or equal to the threshold value 1, that is, when the signal reception intensity or power of the second signal component is greater than or equal to the threshold value 1, the second signal is eliminated Weight.
  • the threshold value 1 may be predefined or determined according to a certain algorithm or rule, which is not limited. That is to say, for interference signal components with low signal reception strength or power, the interference to useful signal components is small or negligible. Therefore, interference cancellation may not be performed, which helps simplify the implementation. For interference signal components with greater signal reception strength or power, the interference to the useful signal components is greater, so interference cancellation is required.
  • threshold 1 (threshold1) satisfies expression 10:
  • K is a constant, which may be predefined or determined according to a certain algorithm or strategy. There is no restriction on this.
  • T p, q satisfy Expression 8.
  • time unit 1 and the time unit 2 in the embodiment of the present application may be understood as the sub-time unit in the foregoing embodiment, or may be a time unit.
  • the network device receives the first pilot signal from the first terminal in the first sub-time unit, and receives the first pilot signal from the first terminal in the second sub-time unit.
  • the second pilot signal of the terminal If the network device also receives the third signal from the second terminal in the first sub-time unit, the signal received by the network device in the first sub-time unit includes the first signal from the first terminal.
  • the pilot signal, and the third signal from the second terminal The signal received by the network device in the second sub-time unit only includes the second pilot signal from the first terminal.
  • the first pilot signal and the third signal are signal components of signals received by the network device in the first sub-time unit, the first pilot signal is a useful signal component, and the third signal is an interference signal component.
  • the LOS path of the first pilot signal is LOS path 1
  • the angle of arrival of LOS path 1 is angle of arrival 1, which is the same as the angle of arrival between the second sub-time unit, the first terminal and the network device .
  • the LOS path of the third signal is LOS path 2, and LOS path 2 is different from LOS path 1. Therefore, the network equipment can eliminate the third signal according to the angle of arrival 1, thereby avoiding the interference of the third signal to the first pilot signal. Help improve channel estimation.
  • the third signal may be a pilot signal, where the pilot sequence of the third pilot signal is the same as the pilot sequence of the first pilot signal.
  • the transmission of wireless signals in the LOS scenario may also cause interference to the signal transmission in the non-LOS scenario, thereby affecting the communication of the terminal (for example, a ground terminal) in the non-LOS scenario.
  • terminal 1 sends a signal to network device 1
  • terminal 2 sends a signal to network device 2.
  • network device 2 If the signal from the terminal 1 is received, the signal from the terminal 1 will cause interference to the network device 2 receiving the signal from the terminal 2.
  • wireless signals can travel in a straight line between the terminal and the network device without obstruction.
  • the embodiment also provides a method for interference cancellation, which can make the network device perform interference cancellation based on the angle of arrival and improve communication performance.
  • another interference cancellation method provided in an embodiment of this application specifically includes the following steps.
  • Step 1401 The network device receives a signal in time unit 1, and the signal includes a first signal component and a second signal component.
  • Step 1402 When the angle of arrival of the second signal component meets the second condition, cancel the second signal component.
  • the second condition may be predefined, or determined by the network device according to a predefined algorithm or policy, which is not limited. For example, if the angle of arrival of the second signal component satisfies the second condition, reference may be made to the related introduction of the signal component whose angle of arrival satisfies the first condition in FIG. 11, which is not repeated here.
  • the network device may detect whether the signal includes multiple signal components whose arrival angles meet the second condition through a spatial filter, and use the signal components whose arrival angles meet the second condition as the signal component from the LOS path.
  • the second condition can be predefined, or determined by the network device according to a certain algorithm or rule. For example, network devices are determined through machine learning.
  • the signal component whose arrival angle meets the second condition may mean that the arrival angle is within the third arrival angle range, or not within the fourth arrival angle range, or the arrival angle is greater than or equal to a certain threshold.
  • the angle of arrival that satisfies the second condition may be referred to as the angle of arrival between the air terminal and the network device, or the angle of arrival of the air terminal for short.
  • the angle of arrival that does not meet the second condition may be referred to as the angle of arrival between the ground terminal and the network device, referred to as the angle of arrival of the ground terminal.
  • the network device detects the signal component in the signal.
  • the network device may detect signal components included in the signal through a spatially matched filter. For example, a signal component whose angle of arrival meets the second condition is taken as the second signal component, and a signal component whose angle of arrival does not satisfy the second condition is taken as the first signal component.
  • the network device may determine the signal component included in the received signal, and the angle of arrival and signal reception power corresponding to the signal component based on Expression 6 and Expression 7, and Expression 8.
  • the signal received power of the second signal component is greater than or equal to the threshold 2.
  • the threshold 2 may refer to the specific implementation of the threshold 1, which will not be repeated here.
  • the threshold 2 may be predefined, or determined according to a certain algorithm or rule, which is not limited. That is to say, for interference signal components with low signal reception strength or power, the interference to useful signal components is small or negligible. Therefore, interference cancellation may not be performed, which helps simplify the implementation. For interference signal components with greater signal reception strength or power, the interference to the useful signal components is greater, so interference cancellation is required.
  • the threshold in the embodiment of the present application may also be referred to as a threshold, which is not limited.
  • the communication method provided in the embodiments of the present application is introduced from the perspective of a terminal device as an execution subject.
  • the terminal device may include a hardware structure and/or a software module, and realize the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether a certain function of the above-mentioned functions is executed by a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • an embodiment of the present application further provides an apparatus 1500.
  • the apparatus 1500 includes a transceiver module 1502 and a processing module 1501.
  • the apparatus 1500 is used to implement the function of the terminal in the foregoing method.
  • the device 1500 may be a network device or a device in a network device.
  • the device may be a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the processing module 1501 may be used to determine the transmission beam of the first signal.
  • the transceiver module 1502 is configured to receive the first pilot signal group from the first terminal in the first time unit, and receive the second pilot signal group from the first terminal in the second time unit, or send the first pilot signal group to the first terminal. signal.
  • the apparatus 1500 is used to implement the function of the terminal device in the foregoing method.
  • the apparatus 1500 may be a terminal device or a device in a terminal device.
  • the device may be a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the transceiver module 1502 is configured to send a first pilot signal group to the network device in a first time unit, send a second pilot signal group to the network device in a second time unit, and receive the first signal from the network device.
  • the processing module 1501 is used to trigger the transceiver module 1502 to send the first pilot signal group and the second pilot signal group.
  • the processing module 1501 and the transceiver module 1502 please refer to the record in the above method embodiment.
  • the division of modules in the embodiments of this application is illustrative, and it is only a logical function division. In actual implementation, there may be other division methods.
  • the functional modules in the various embodiments of this application can be integrated into one process. In the device, it can also exist alone physically, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software function modules.
  • an embodiment of the present application further provides an apparatus 1600.
  • the apparatus 1600 is used to implement the function of the terminal in the foregoing method, and the apparatus 1600 may be a network device or a device in the network device.
  • the apparatus 1600 includes at least one processor 1601, configured to implement the function of the network device in the foregoing method.
  • the processor 1601 may be used to determine the transmission beam of the first signal.
  • the apparatus 1600 may further include at least one memory 1602 for storing program instructions and/or data.
  • the memory 1602 is coupled with the processor 1601.
  • the coupling in the embodiments of the present application is an interval coupling or a communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the memory 1602 may also be located outside the apparatus 1600.
  • the processor 1601 may cooperate with the memory 1602 to operate.
  • the processor 1601 may execute program instructions stored in the memory 1602. At least one of the at least one memory may be included in the processor.
  • the apparatus 1600 may further include a communication interface 1603 for communicating with other devices through a transmission medium, so that the apparatus used in the apparatus 1600 can communicate with other devices.
  • the communication interface 1603 may be a transceiver, circuit, bus, module, or other type of communication interface, and the other device may be a network device.
  • the processor 1601 uses the communication interface 1603 to send and receive data, and is used to implement the method in the foregoing embodiment.
  • the communication interface 1603 is used to receive the first pilot signal group and the second pilot signal group, or send the first signal.
  • the device 1600 is used to implement the functions of the terminal in the foregoing method, and the device 1600 may be a terminal or a device in the terminal.
  • the apparatus 1600 has at least one processor 1601, configured to implement the function of the first terminal in the foregoing method.
  • the processor 1601 may be used to trigger the sending of the first pilot signal group and the second pilot signal group.
  • the apparatus 1600 may further include at least one memory 1602 for storing program instructions and/or data.
  • the memory 1602 is coupled with the processor 1601.
  • the coupling in the embodiments of the present application is an interval coupling or a communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the memory 1602 may also be located outside the apparatus 1600.
  • the processor 1601 may cooperate with the memory 1602 to operate.
  • the processor 1601 may execute program instructions stored in the memory 1602. At least one of the at least one memory may be included in the processor.
  • the apparatus 1600 may further include a communication interface 1603 for communicating with other devices through a transmission medium, so that the apparatus used in the apparatus 1600 can communicate with other devices.
  • the communication interface 1603 may be a transceiver, a circuit, a bus, a module, or another type of communication interface, and the other device may be a terminal.
  • the processor 1601 uses the communication interface 1603 to send and receive data, and is used to implement the method in the foregoing embodiment.
  • the communication interface 1603 can send the first pilot signal group and the second pilot signal group, or receive the first signal.
  • connection medium between the communication interface 1603, the processor 1601, and the memory 1602 is not limited.
  • the memory 1602, the processor 1601, and the communication interface 1603 may be connected by a bus, and the bus may be divided into an address bus, a data bus, and a control bus.
  • the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which may implement or Perform the methods, steps, and logical block diagrams disclosed in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), for example Random-access memory (RAM).
  • the memory is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited to this.
  • the memory in the embodiments of the present application may also be a circuit or any other device capable of realizing a storage function for storing program instructions and/or data.
  • the methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented by software, it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, network equipment, user equipment, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a digital video disc (digital video disc, DVD for short)), or a semiconductor medium (for example, SSD).

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Un procédé et un appareil de communication, se rapportant au domaine technique des communications, sont destinés à être utilisés pour améliorer la fiabilité d'un terminal se déplaçant à grande vitesse dans un environnement LOS pour recevoir un signal. Le procédé comprend les étapes suivantes : un dispositif de réseau reçoit un premier groupe de signaux pilotes à partir d'un premier terminal à l'intérieur d'une première unité de temps et reçoit un second groupe de signaux pilotes à partir du premier terminal à l'intérieur d'une seconde unité de temps, puis envoie un premier signal au premier terminal. De plus, un faisceau de transmission du premier signal est déterminé en fonction du premier groupe de signaux pilotes et du second groupe de signaux pilotes, et la première unité de temps est différente de la seconde unité de temps. La solution technique aide à améliorer la possibilité d'aligner le faisceau de transmission du dispositif de réseau avec un faisceau de réception du terminal, ce qui permet d'améliorer la fiabilité du terminal pour recevoir le signal envoyé par le dispositif de réseau.
PCT/CN2019/119503 2019-11-19 2019-11-19 Procédé et appareil de communication WO2021097679A1 (fr)

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PCT/CN2019/119503 WO2021097679A1 (fr) 2019-11-19 2019-11-19 Procédé et appareil de communication

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CN103281110A (zh) * 2013-04-26 2013-09-04 大唐移动通信设备有限公司 波束赋形方法和设备
US20180323855A1 (en) * 2017-05-04 2018-11-08 Samsung Electronics Co., Ltd. Method and apparatus for beam association between downlink/uplink
CN109802801A (zh) * 2017-11-17 2019-05-24 华为技术有限公司 发送和接收信号的方法、装置和系统

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CN103281110A (zh) * 2013-04-26 2013-09-04 大唐移动通信设备有限公司 波束赋形方法和设备
US20180323855A1 (en) * 2017-05-04 2018-11-08 Samsung Electronics Co., Ltd. Method and apparatus for beam association between downlink/uplink
CN109802801A (zh) * 2017-11-17 2019-05-24 华为技术有限公司 发送和接收信号的方法、装置和系统

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