WIRELESS COMMUNICATION METHOD AND DEVICE
FIG4 is a schematic diagram of different patterns of PTRSs
FIG4 is a schematic diagram of different patterns of PTRSs, and (a) in FIG4 is a schematic diagram of a current pattern of a PTRS. The network device determines the pattern of the phase tracking reference signal based on the at least one of the modulation and coding scheme threshold that is corresponding to the pattern of the phase tracking reference signal and requested by the terminal device, the scheduled resource block quantity threshold that is corresponding to the pattern of the phase tracking reference signal and requested by the terminal device, and the factor of the impact of the phase noise of the terminal device on the signal received by the terminal device that are sent by the terminal device and the at least one of the currently scheduled modulation and coding scheme and the currently scheduled bandwidth. The determined pattern of the PTRS may be (b) in FIG4 or (c) in FIG4. In FIG. (a), a PTRS has a frequency domain density of 1 (there is one PTRS on every 12 subcarriers) and a time domain density of 1. In FIG. (b), a PTRS has a frequency domain density of 1 (there is one PTRS on every 12 subcarriers) and a time domain density of 1/2. In FIG. (c), a PTRS has a frequency domain density of 1/2 (there is one PTRS on every 24 subcarriers) and a time domain density of 1. The network device flexibly adjusts the pattern of the phase tracking reference signal, so that a quantity of subcarriers occupied by the phase tracking reference signal is reduced.
schematic diagram
4
Table
['3. The method according to claim 1, wherein before the determining, by a network device, a pattern of a phase tracking reference signal based on at least one of a modulation and coding scheme threshold that is corresponding to the pattern of the phase tracking reference signal and requested by a terminal device, a scheduled resource block quantity threshold that is corresponding to the pattern of the phase tracking reference signal and requested by the terminal device, and a factor of impact of phase noise of the terminal device on a signal received by the terminal device and at least one of a modulation and coding scheme currently scheduled by the network device for the terminal device and bandwidth currently scheduled by the network device for the terminal device, the method further comprises: receiving, by the network device, a number of a table of the modulation and coding scheme threshold corresponding to the pattern of the phase tracking reference signal and/or a number of a table of the scheduled resource block quantity threshold corresponding to the pattern of the phase tracking reference signal that are/is sent by the terminal device.']