Method and apparatus for determining transmit power
A method and an apparatus for determining transmit power, where a first network device obtains first information corresponding to a first carrier, where the first information includes at least one of a path loss, a range of the path loss, signal strength, a range of the signal strength, a channel quality state, or a range of the channel quality state; and where the first network device sends the first information to a terminal device. The terminal device determines uplink transmit power on the first carrier based on the first information. In this way, the uplink transmit power on the first carrier is accurately controlled, communication reliability is improved, and power consumption of the terminal device is reduced.
1 . A method for determining transmit power, the method comprising:
sending a first uplink signal to a first network device on a first carrier, wherein the first carrier is an all-uplink carrier;
receiving first information from a second network device, wherein the first information indicates at least one of a path loss, a range of the path loss, a signal strength, a range of the signal strength, a channel quality state, or a range of the channel quality state, wherein the path loss corresponds to the first carrier or a first carrier group, wherein the range of the path loss corresponds to the first carrier or the first carrier group, wherein the signal strength corresponds to the first carrier or the first carrier group, wherein the range of the signal strength corresponds to the first carrier or the first carrier group, wherein a signal quality state corresponds to the first carrier or the first carrier group, wherein the range of the signal quality state corresponds to the first carrier or the first carrier group, wherein the first carrier is an uplink carrier or a carrier whose uplink slot configuration dominates in a slot configuration, and wherein the first carrier is in the first carrier group; and determining uplink transmit power on the first carrier based on the first information.
2 . The method according to claim 1 , wherein sending the first uplink signal to the first network device on the first carrier comprises sending, on the first carrier, the first uplink signal to the first network device at a first power value, and wherein the first power value is:
comprised in the first uplink signal,
preconfigured, or
associated with a transmission configuration of the first uplink signal.
3 . The method according to claim 1 , wherein the first information is carried in a random access response message or system information.
4 . The method according to claim 1 , further comprising:
obtaining at least one of a target power value corresponding to the first carrier or a path loss compensation factor corresponding to the first carrier, wherein the target power value and the path loss compensation factor are configured by the first network device or the second network device for a terminal device using radio resource control signaling; and
determining the uplink transmit power based on the first information and at least one of the target power value or the path loss compensation factor.
5 . The method according to claim 1 , wherein the first uplink signal is a sounding reference signal (SRS).
6 . A method for determining transmit power, the method comprising:
receiving a first uplink signal from a terminal device on a first carrier, wherein the first carrier is an all-uplink carrier;
determining first information based on the first uplink signal, wherein the first information comprises at least one of a path loss, a range of the path loss, a signal strength, a range of the signal strength, a channel quality state, or a range of the channel quality state; and
sending the first information to a second network device, wherein the first information comprises at least one of the path loss, the range of the path loss, the signal strength, the range of the signal strength, the channel quality state, or the range of the channel quality state, wherein the path loss corresponds to the first carrier or a first carrier group, wherein the range of the path loss corresponds to the first carrier or the first carrier group, wherein the signal strength corresponds to the first carrier or the first carrier group, wherein the range of the signal strength corresponds to the first carrier or the first carrier group, wherein a signal quality state corresponds to the first carrier or the first carrier group, wherein the range of the signal quality state corresponds to the first carrier or the first carrier group, wherein the first carrier is an uplink carrier or a carrier whose uplink slot configuration dominates in a slot configuration, and wherein the first carrier is in the first carrier group.
7 . The method according to claim 6 , wherein receiving the first uplink signal from the terminal device on the first carrier comprises receiving, on the first carrier, the first uplink signal from the terminal device at a first power value, wherein the first power value is:
comprised in the first uplink signal,
preconfigured, or
associated with a transmission configuration of the first uplink signal.
8 . The method according to claim 6 , wherein the first uplink signal is a sounding reference signal (SRS).
9 . An apparatus for determining transmit power, the apparatus comprising:
a memory storage device configured to store instructions; and
one or more processors in communication with the memory storage device, wherein the instructions, when executed by the one or more processors, cause the apparatus to:
send a first uplink signal to a first network device on a first carrier, wherein the first carrier is an all-uplink carrier;
receive first information from a second network device, wherein the first information indicates at least one of a path loss, a range of the path loss, a signal strength, a range of the signal strength, a channel quality state, or a range of the channel quality state, wherein the path loss corresponds to the first carrier or a first carrier group, wherein the range of the path loss corresponds to the first carrier or the first carrier group, wherein the signal strength corresponds to the first carrier or the first carrier group, wherein the range of the signal strength corresponds to the first carrier or the first carrier group, wherein a signal quality state corresponds to the first carrier or the first carrier group, wherein the range of the signal quality state corresponds to the first carrier or the first carrier group, wherein the first carrier is an uplink carrier or a carrier whose uplink slot configuration dominates in a slot configuration, and wherein the first carrier is in the first carrier group; and
determine uplink transmit power on the first carrier based on the first information.
10 . The apparatus according to claim 9 , wherein the instructions, when executed by the one or more processors, further cause the apparatus to send, on the first carrier, the first uplink signal to the first network device at a first power value, wherein the first power value is:
comprised in the first uplink signal,
preconfigured, or
associated with a transmission configuration of the first uplink signal.
11 . The apparatus according to claim 9 , wherein the first information is carried in a random access response message or system information.
12 . The apparatus according to claim 9 , wherein the instructions, when executed by the one or more processors, further cause the apparatus to:
obtain at least one of a target power value corresponding to the first carrier or a path loss compensation factor corresponding to the first carrier, wherein the target power value and the path loss compensation factor are configured by the first network device or the second network device for a terminal device using radio resource control signaling; and further determine the uplink transmit power based on the first information and at least one of the target power value or the path loss compensation factor.
13 . The apparatus according to claim 9 , wherein the first uplink signal is a sounding reference signal (SRS).
14 . An apparatus for determining transmit power, the apparatus comprising:
a memory storage device configured to store instructions; and
one or more processors in communication with the memory storage device, wherein the instructions, when executed by the one or more processors, cause the apparatus to:
receive a first uplink signal from a terminal device on a first carrier, wherein the first carrier is an all-uplink carrier;
determine first information based on the first uplink signal, wherein the first information comprises at least one of a path loss, a range of the path loss, a signal strength, a range of the signal strength, a channel quality state, or a range of the channel quality state; and
send the first information to a second network device, wherein the first information comprises at least one of the path loss, the range of the path loss, the signal strength, the range of the signal strength, the channel quality state, or the range of the channel quality state, wherein the path loss corresponds to the first carrier or a first carrier group, wherein the range of the path loss corresponds to the first carrier or the first carrier group, wherein the signal strength corresponds to the first carrier or the first carrier group, wherein the range of the signal strength corresponds to the first carrier or the first carrier group, wherein a signal quality state corresponds to the first carrier or the first carrier group, wherein the range of the signal quality state corresponds to the first carrier or the first carrier group, wherein the first carrier is an uplink carrier or a carrier whose uplink slot configuration dominates in a slot configuration, and wherein the first carrier is in the first carrier group.
15 . The apparatus according to claim 14 , wherein the instructions, when executed by the one or more processors, further cause the apparatus to receive, on the first carrier, the first uplink signal from the terminal device at a first power value, wherein the first power value is:
comprised in the first uplink signal,
preconfigured, or
associated with a transmission configuration of the first uplink signal.
16 . The apparatus according to claim 14 , wherein the instructions, when executed by the one or more processors, further cause the apparatus to send the first information to the terminal device within a first slot, wherein the first slot is a downlink slot configured by a first network device for the terminal device.
17 . The apparatus according to claim 14 , wherein the first uplink signal is a sounding reference signal (SRS).