Transmission power control for beam failure recovery requests
Systems, apparatuses, and methods are described for wireless communications. A base station may transmit indications of target received powers for a random access procedure and a beam failure recovery procedure. A wireless device may transmit a random access preamble and a beam failure recovery preamble using different transmission powers based on the indications of target received powers.
1 . A method comprising:
receiving, by a wireless device, at least one configuration parameter for pathloss associated with a preamble transmission via a cell, wherein the at least one configuration parameter is associated with a candidate signal; and
transmitting, via a random access channel and using a transmission power that is based on the at least one configuration parameter for pathloss, a preamble for beam failure recovery associated with the cell.
2 . The method of claim 1 , wherein the at least one configuration parameter indicates a reference signal power associated with the candidate signal.
3 . The method of claim 2 , further comprising determining, based on a difference between the reference signal power and a filtered reference signal received power (RSRP), a pathloss value.
4 . The method of claim 1 , further comprising determining, based on a pathloss value, the transmission power,
wherein the pathloss value is based on a difference between a reference signal power associated with the candidate signal and a filtered reference signal received power (RSRP).
5 . The method of claim 1 , wherein the candidate signal comprises a synchronization signal block corresponding to a candidate beam.
6 . The method of claim 1 , wherein the candidate signal is associated with the random access channel for transmission of the preamble.
7 . The method of claim 1 , further comprising:
receiving at least one message indicating a plurality of candidate reference signals for beam failure recovery associated with the cell, wherein each candidate reference signal of the plurality of candidate reference signals corresponds to a respective preamble of a plurality of preambles, and
wherein the candidate signal is a selected candidate reference signal, of the plurality of candidate reference signals, corresponding to the transmitted preamble for beam failure recovery.
8 . A method comprising:
transmitting, by a base station, at least one configuration parameter for pathloss associated with a preamble transmission via a cell, wherein the at least one configuration parameter is associated with a candidate signal; and
receiving, via a random access channel, a preamble for beam failure recovery associated with the cell, wherein a transmission power for the preamble for beam failure recovery is associated with the at least one configuration parameter.
9 . The method of claim 8 , wherein the at least one configuration parameter indicates a reference signal power associated with the candidate signal.
10 . The method of claim 9 , wherein the pathloss is based on a difference between the reference signal power and a filtered reference signal received power (RSRP).
11 . The method of claim 8 , wherein the transmission power is based on the pathloss.
12 . The method of claim 8 , wherein the candidate signal comprises a synchronization signal block corresponding to a candidate beam.
13 . The method of claim 8 , wherein the candidate signal is associated with the random access channel for transmission of the preamble.
14 . The method of claim 8 , further comprising:
transmitting at least one message indicating a plurality of candidate reference signals for beam failure recovery associated with the cell, wherein each candidate reference signal of the plurality of candidate reference signals corresponds to a respective preamble of a plurality of preambles, and
wherein the candidate signal is a selected candidate reference signal, of the plurality of candidate reference signals, corresponding to the received preamble for beam failure recovery.
15 . A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, configure the wireless device to:
receive at least one configuration parameter for pathloss associated with a preamble transmission via a cell, wherein the at least one configuration parameter is associated with a candidate signal; and
transmit, via a random access channel and using a transmission power that is based on the at least one configuration parameter for pathloss, a preamble for beam failure recovery associated with the cell.
16 . The wireless device of claim 15 , wherein the at least one configuration parameter indicates a reference signal power associated with the candidate signal.
17 . The wireless device of claim 16 , wherein the instructions, when executed by the one or more processors, configure the wireless device to determine, based on a difference between the reference signal power and a filtered reference signal received power (RSRP), a pathloss value.
18 . The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, configure the wireless device to determine, based on a pathloss value, the transmission power, and
wherein the pathloss value is based on a difference between a reference signal power associated with the candidate signal and a filtered reference signal received power (RSRP).
19 . The wireless device of claim 15 , wherein the candidate signal comprises a synchronization signal block corresponding to a candidate beam.
20 . The wireless device of claim 15 , wherein the candidate signal is associated with the random access channel for transmission of the preamble.
21 . The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, configure the wireless device to:
receive at least one message indicating a plurality of candidate reference signals for beam failure recovery associated with the cell, wherein each candidate reference signal of the plurality of candidate reference signals corresponds to a respective preamble of a plurality of preambles, and
wherein the candidate signal is a selected candidate reference signal, of the plurality of candidate reference signals, corresponding to the transmitted preamble for beam failure recovery.
22 . A base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, configure the base station to:
transmit at least one configuration parameter for pathloss associated with a preamble transmission via a cell, wherein the at least one configuration parameter is associated with a candidate signal; and
receive, via a random access channel, a preamble for beam failure recovery associated with the cell, wherein a transmission power for the preamble for beam failure recovery is associated with the at least one configuration parameter.
23 . The base station of claim 22 , wherein the at least one configuration parameter indicates a reference signal power associated with the candidate signal.
24 . The base station of claim 23 , wherein the pathloss is based on a difference between the reference signal power and a filtered reference signal received power (RSRP).
25 . The base station of claim 22 , wherein the transmission power is based on the pathloss.
26 . The base station of claim 22 , wherein the candidate signal comprises a synchronization signal block corresponding to a candidate beam.
27 . The base station of claim 22 , wherein the candidate signal is associated with the random access channel for transmission of the preamble.
28 . The base station of claim 22 , wherein the instructions, when executed by the one or more processors, configure the base station to:
transmit at least one message indicating a plurality of candidate reference signals for beam failure recovery associated with the cell, wherein each candidate reference signal of the plurality of candidate reference signals corresponds to a respective preamble of a plurality of preambles, and
wherein the candidate signal is a selected candidate reference signal, of the plurality of candidate reference signals, corresponding to the received preamble for beam failure recovery.
29 . A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:
receive at least one configuration parameter for pathloss associated with a preamble transmission via a cell, wherein the at least one configuration parameter is associated with a candidate signal; and
transmit, via a random access channel and using a transmission power that is based on the at least one configuration parameter for pathloss, a preamble for beam failure recovery associated with the cell.
30 . The non-transitory computer-readable medium of claim 29 , wherein the at least one configuration parameter indicates a reference signal power associated with the candidate signal, and
wherein the candidate signal is associated with the random access channel for transmission of the preamble.
31 . The non-transitory computer-readable medium of claim 29 , wherein the instructions, when executed, configure the wireless device to determine, based on a pathloss value, the transmission power, and
wherein the pathloss value is based on a difference between a reference signal power associated with the candidate signal and a filtered reference signal received power (RSRP).
32 . A non-transitory computer-readable medium storing instructions that, when executed, configure a base station to:
transmit at least one configuration parameter for pathloss associated with a preamble transmission via a cell, wherein the at least one configuration parameter is associated with a candidate signal; and
receive, via a random access channel, a preamble for beam failure recovery associated with the cell, wherein a transmission power for the preamble for beam failure recovery is associated with the at least one configuration parameter.
33 . The non-transitory computer-readable medium of claim 32 , wherein the at least one configuration parameter indicates a reference signal power associated with the candidate signal, and
wherein the candidate signal is associated with the random access channel for transmission of the preamble.
34 . The non-transitory computer-readable medium of claim 33 , wherein the pathloss is based on a difference between the reference signal power and a filtered reference signal received power (RSRP), and
wherein the transmission power is based on the pathloss.
35 . A system comprising:
a wireless device; and
a base station,
wherein the base station is configured to:
transmit at least one configuration parameter for pathloss associated with a preamble transmission via a cell, wherein the at least one configuration parameter is associated with a candidate signal, and
wherein the wireless device is configured to:
transmit, via a random access channel and using a transmission power that is based on the at least one configuration parameter for pathloss, a preamble for beam failure recovery associated with the cell.
36 . The system of claim 35 , wherein the at least one configuration parameter indicates a reference signal power associated with the candidate signal, and
wherein the candidate signal is associated with the random access channel for transmission of the preamble.
37 . The system of claim 36 , wherein the pathloss is based on a difference between the reference signal power and a filtered reference signal received power (RSRP), and
wherein the transmission power is based on the pathloss.
38 . The system of claim 35 , wherein the base station is configured to:
transmit at least one message indicating a plurality of candidate reference signals for beam failure recovery associated with the cell, wherein each candidate reference signal of the plurality of candidate reference signals corresponds to a respective preamble of a plurality of preambles, and
wherein the candidate signal is a selected candidate reference signal, of the plurality of candidate reference signals, corresponding to the preamble for beam failure recovery.