CN114642017A

CN114642017A - A communication method and device

Info

Publication number: CN114642017A
Application number: CN201980102034.2A
Authority: CN
Inventors: 王婷; 黄逸; 张瑞; 周国华
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2022-06-17
Also published as: WO2021097679A1

Abstract

A communication method and device relate to the technical field of communication, so as to improve the reliability of a signal received by a terminal moving at high speed in an LOS environment. Wherein the method includes: the network device receives the first pilot signal group from the first terminal in the first time unit, and receives the second pilot signal group from the first terminal in the second time unit; and then sends to the first terminal The first signal, and the transmission beam of the first signal is determined according to the first pilot signal group and the second pilot signal group, and the first time unit and the second time unit are different. This technical solution helps to improve the possibility that the transmission beam of the network device is aligned with the reception beam of the terminal, thereby improving the reliability of the terminal receiving the signal sent by the network device.

Description

PCT国内申请，说明书已公开。PCT domestic application, the description has been published.

Claims

A method of communication, the method comprising:

receiving a first set of pilot signals from a first terminal at a first time unit and a second set of pilot signals from the first terminal at a second time unit; the first time unit and the second time unit are different;

transmitting a first signal to the first terminal, a transmission beam of the first signal being determined from the first set of pilot signals and the second set of pilot signals.
The method of claim 1, wherein the method further comprises:

and sending first indication information to the first terminal, wherein the first indication information is used for indicating the first terminal to send the first pilot signal group and the second pilot signal group.
The method of claim 1 or 2, wherein the transmit beam for the first signal is determined from the first set of pilot signals and the second set of pilot signals, comprising:

a transmit beam of the first signal is determined from a first angle of arrival determined from the first set of pilot signals and a second angle of arrival determined from the second set of pilot signals;

wherein the first angle of arrival is an angle of arrival between the first terminal and a network device at the first time unit; the second angle of arrival is an angle of arrival between the first terminal and the network device at the second time unit.
The method of any of claims 1 to 3, wherein the first time unit comprises a first sub-time unit and a second sub-time unit, the first set of pilot signals comprises a first pilot signal and a second pilot signal;

the receiving a first set of pilot signals from a first terminal at a first time unit includes:

receiving a first pilot signal from the first terminal at the first sub-time unit and receiving the second pilot signal from the first terminal at the second sub-time unit.
The method of claim 4, wherein the line-of-sight, LOS, path of the first pilot signal is a first LOS path; the arrival angle of the first LOS path is a third arrival angle; the third angle of arrival is an angle of arrival between the first terminal and the network device at the second sub-time unit;

the method further comprises the following steps:

receiving a second signal from a second terminal in the first sub-time unit; the LOS path of the second signal is a second LOS path; canceling the second signal when the second LOS path is different from the first LOS.
The method of claim 5, wherein a signal received strength of the second signal is greater than or equal to a second threshold.
The method of claim 5 or 6, wherein the second sub-time unit and the first sub-time unit are two sub-time units that are consecutive 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,

a fourth angle of arrival is the same as the third angle of arrival; or,

a difference between a fourth angle-of-arrival and the third angle-of-arrival is less than or equal to a third threshold;

wherein the fourth angle of arrival is an angle of arrival between the first terminal and the network device in the first sub-time unit.
The method of any of claims 4 to 7, wherein said receiving a first pilot signal from said first terminal in said first sub-time unit comprises:

receiving the first pilot signal from the first terminal through a first receive beam in the first sub-time unit;

said receiving said second pilot signal from said first terminal in said second sub-time unit comprises:

receiving the second pilot signal from the first terminal through a second receive beam in the second sub-time unit.
The method of any of claims 1 to 3, wherein the first set of pilot signals comprises third pilot signals and the second set of pilot signals comprises fourth pilot signals.
A method of communication, the method comprising:

transmitting a first set of pilot signals to a network device at a first time unit and a second set of pilot signals to the network device at a second time unit; the first time unit is different from the second time unit;

receiving a first signal transmitted from the network device, a transmission beam of the first signal being determined from the first set of pilot signals and the second set of pilot signals.
The method of claim 10, wherein the method further comprises:

and receiving first indication information from the network equipment, wherein the first indication information is used for indicating a terminal to send the first pilot signal group and the second pilot signal group.
The method of claim 10, wherein the method further comprises:

after a pilot signal is sent to the network equipment in a third time unit, starting a timer to start timing;

detecting that no pilot signal is sent to the network equipment before the timer finishes timing;

the transmitting a first set of pilot signals to a network device at a first time unit and a second set of pilot signals to the network device at a second time unit includes:

when the timer finishes timing, the first pilot signal group is sent to the network equipment in the first time unit, and the second pilot signal group is sent to the network equipment in the second time unit.
The method of any of claims 10 to 12, wherein the first time unit comprises a first sub-time unit and a second sub-time unit, the first set of pilot signals comprises a first pilot signal and a second pilot signal;

the first pilot signal group sent to the network device in the first time unit includes:

transmitting the first pilot signal to the network device in the first sub-time unit, and transmitting the second pilot signal to the network device in the second sub-time unit.
The method of claim 13, wherein said transmitting said first pilot signal to said network device in said first sub-time unit comprises:

transmitting the first pilot signal to the network device through a first transmit beam in the first sub-time unit;

the transmitting the second pilot signal to the network device in the second sub-time unit includes:

and transmitting the second pilot signal to the network equipment through a second transmission beam in the second sub-time unit.
The method of any of claims 10 to 12, wherein the first set of pilot signals comprises a third pilot signal; the second set of pilot signals includes a fourth pilot signal.
A communications device arranged to implement a method as claimed in any one of claims 1 to 9 or arranged to implement a method as claimed in any one of claims 10 to 15.
A communications apparatus comprising a processor and a memory, the memory having stored therein instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 1 to 9.
A communications apparatus comprising a processor and a memory, the memory having stored therein instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 10 to 15.
A computer-readable storage medium having stored thereon instructions which, when executed on a computer, cause the computer to perform the method of any of claims 1 to 9, or 10 to 15.