Frequency compensation method and frequency compensation apparatus
Example frequency compensation methods and apparatus are described. One example method includes determining first information and sending the first information by a network device to a terminal device, where the first information indicates a frequency compensation manner of an uplink signal of the terminal device or the first information indicates a configuration parameter of the terminal device. The terminal device receives the first information, and determines, based on the first information, the frequency compensation manner to be used to send the uplink signal. The terminal device performs frequency compensation for the uplink signal based on the frequency compensation manner.
1 . A frequency compensation method, comprising:
receiving, by a terminal device, first information from a network device, wherein the first information indicates a configuration parameter of the terminal device, and wherein the configuration parameter comprises timestamp information;
receiving, by the terminal device, second information from the network device, wherein the second information indicates to the terminal device to determine uplink timing information;
determining, by the terminal device, the uplink timing information of the terminal device based on the second information, the timestamp information, and global navigation satellite system (GNSS) time information;
determining, by the terminal device based on the uplink timing information, that the terminal device is in a first moving communication state; and
determining, by the terminal device, a frequency compensation manner of an uplink signal of the terminal device as a frequency compensation manner corresponding to the first moving communication state, wherein:
the frequency compensation manner is a first frequency compensation manner or a second frequency compensation manner;
a first compensation value corresponding to the first frequency compensation manner is a frequency offset generated by relative motion between the network device and the terminal device; and
a second compensation value corresponding to the second frequency compensation manner is a difference between a first threshold and the frequency offset generated by relative motion between the network device and the terminal device; and
performing, by the terminal device, frequency compensation for the uplink signal based on the frequency compensation manner.
2 . The frequency compensation method according to claim 1 , wherein:
the first threshold is determined based on a compensation value of a downlink signal of the network device; or
the first threshold is specified in a protocol.
3 . The frequency compensation method according to claim 1 , wherein:
the first information further indicates the frequency compensation manner of the uplink signal of the terminal device; and
the frequency compensation method further comprises:
in response to determining that the first information is a first bit value, determining, by the terminal device, the frequency compensation manner as the first frequency compensation manner corresponding to the first bit value; or
in response to determining that the first information is a second bit value, determining, by the terminal device, the frequency compensation manner as the second frequency compensation manner corresponding to the second bit value.
4 . The frequency compensation method according to claim 1 , wherein:
a transmit frequency of the uplink signal is a difference between an absolute frequency of the uplink signal and the first compensation value; or
a transmit frequency of the uplink signal is a difference between an absolute frequency of the uplink signal and the second compensation value.
5 . The frequency compensation method according to claim 1 , further comprising
determining, by the terminal device based on the configuration parameter, that the terminal device is in the first moving communication state; and
determining, by the terminal device, the frequency compensation manner as the frequency compensation manner corresponding to the first moving communication state.
6 . The frequency compensation method according to claim 1 , wherein:
the configuration parameter further comprises location information of a reference point of the network device; and
the frequency compensation method further comprises:
determining, by the terminal device based on the location information of the reference point of the network device, that the terminal device is in the first moving communication state; and
determining, by the terminal device, the frequency compensation manner as the frequency compensation manner corresponding to the first moving communication state.
7 . The frequency compensation method according to claim 1 , wherein the first information further comprises:
at least one of a cell identifier or a beam identifier.
8 . The frequency compensation method according to claim 1 , wherein the first information is carried in any one of the following messages:
a broadcast message, a handover configuration message, or a measurement configuration message.
9 . A frequency compensation apparatus, comprising:
at least one processor; and
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
receive first information from a network device, wherein the first information indicates a configuration parameter of the frequency compensation apparatus, and wherein the configuration parameter comprises timestamp information;
receive second information from the network device, wherein the second information indicates to the frequency compensation apparatus to determine uplink timing information;
determine the uplink timing information of the frequency compensation apparatus based on the second information, the timestamp information, and global navigation satellite system (GNSS) time information;
determine, based on the uplink timing information, that the frequency compensation apparatus is in a first moving communication state; and
determine a frequency compensation manner of an uplink signal of the frequency compensation apparatus as a frequency compensation manner corresponding to the first moving communication state, wherein:
the frequency compensation manner is a first frequency compensation manner or a second frequency compensation manner;
a first compensation value corresponding to the first frequency compensation manner is a frequency offset generated by relative motion between the network device and the frequency compensation apparatus; and
a second compensation value corresponding to the second frequency compensation manner is a difference between a first threshold and the frequency offset generated by relative motion between the network device and the frequency compensation apparatus; and
perform frequency compensation for the uplink signal based on the frequency compensation manner.
10 . The frequency compensation apparatus according to claim 9 , wherein:
the first threshold is determined based on a compensation value of a downlink signal of the network device; or
the first threshold is specified in a protocol.
11 . The frequency compensation apparatus according to claim 9 , wherein:
the first information further indicates the frequency compensation manner of the uplink signal of the frequency compensation apparatus; and
the one or more memories store the programming instructions for execution by the at least one processor further to:
in response to determining that the first information is a first bit value, determine the frequency compensation manner as the first frequency compensation manner corresponding to the first bit value; or
in response to determining that the first information is a second bit value, determine the frequency compensation manner as the second frequency compensation manner corresponding to the second bit value.
12 . The frequency compensation apparatus according to claim 9 , wherein:
a transmit frequency of the uplink signal is a difference between an absolute frequency of the uplink signal and the first compensation value; or
a transmit frequency of the uplink signal is a difference between an absolute frequency of the uplink signal and the second compensation value.
13 . The frequency compensation apparatus according to claim 9 , wherein:
the one or more memories store the programming instructions for execution by the at least one processor further to:
determine, based on the configuration parameter, that the frequency compensation apparatus is in the first moving communication state; and
determine the frequency compensation manner as the frequency compensation manner corresponding to the first moving communication state.
14 . The frequency compensation apparatus according to claim 9 , wherein:
the configuration parameter further comprises location information of a reference point of the network device; and
the one or more memories store the programming instructions for execution by the at least one processor further to:
determine, based on the location information of the reference point of the network device, that the frequency compensation apparatus is in the first moving communication state; and
determine the frequency compensation manner as the frequency compensation manner corresponding to the first moving communication state.
15 . The frequency compensation apparatus according to claim 9 , wherein the first information further comprises:
at least one of a cell identifier or a beam identifier.
16 . A communication system, comprising a terminal device and a network device, wherein the terminal device comprises:
at least one processor; and
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
receive first information from the network device, wherein the first information indicates a configuration parameter of the terminal device, and wherein the configuration parameter comprises timestamp information;
receive second information from the network device, wherein the second information indicates to the terminal device to determine uplink timing information;
determine the uplink timing information of the terminal device based on the second information, the timestamp information, and global navigation satellite system (GNSS) time information;
determine, based on the uplink timing information, that the terminal device is in a first moving communication state; and
determine a frequency compensation manner of an uplink signal of the terminal device as a frequency compensation manner corresponding to the first moving communication state, wherein:
the frequency compensation manner is a first frequency compensation manner or a second frequency compensation manner;
a first compensation value corresponding to the first frequency compensation manner is a frequency offset generated by relative motion between the network device and the terminal device; and
a second compensation value corresponding to the second frequency compensation manner is a difference between a first threshold and the frequency offset generated by relative motion between the network device and the terminal device; and
perform frequency compensation for the uplink signal based on the frequency compensation manner.