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 from a base station, one or more radio resource control messages comprising configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble received target power value for beam failure recovery associated with the cell; and
a second preamble received target power value for random access associated with the cell;
based on a beam failure of the cell, transmitting, using a first transmission power that is based on the first preamble received target power value, a first preamble for beam failure recovery associated with the beam failure of the cell; and
transmitting, via the cell and using a second transmission power that is based on the second preamble received target power value, a second preamble associated with random access.
2. The method of claim 1 , further comprising:
determining the first transmission power based on adding the first preamble received target power value and a power offset value indicated by a preamble format parameter.
3. The method of claim 1 , further comprising:
measuring, based on one or more first reference signal resources, a beam link quality; and
determining, based on the measured beam link quality, the beam failure of the cell.
4. The method of claim 1 , wherein the first transmission power is further based on a first reference signal power value and a first path loss value.
5. The method of claim 4 , wherein the first path loss value is based on a layer 1 reference signal received power value.
6. The method of claim 1 , wherein the configuration parameters further comprise at least one of:
a channel state information reference signal;
a synchronization signal block; or
a demodulation reference signal for a physical broadcast channel.
7. The method of claim 1 , wherein the transmitting the second preamble comprises:
transmitting, based on receiving a physical downlink control channel order, the second preamble.
8. A method comprising:
transmitting, by a base station to a wireless device, one or more radio resource control messages comprising configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble received target power value for beam failure recovery associated with the cell; and
a second preamble received target power value for random access associated with the cell;
receiving, from the wireless device, a first preamble for beam failure recovery associated with a beam failure of the cell, wherein a first transmission power of the first preamble is based on the first preamble received target power value; and
receiving, via the cell and from the wireless device, a second preamble associated with random access, wherein a second transmission power of the second preamble is based on the second preamble received target power value.
9. The method of claim 8 , wherein the first transmission power comprises a sum of the first preamble received target power value and a power offset value indicated by a preamble format parameter.
10. The method of claim 8 , further comprising:
determining, based on the receiving the first preamble, the beam failure of the cell; and
transmitting, after the determining the beam failure of the cell, a signal associated with beam failure recovery.
11. The method of claim 8 , wherein the first transmission power is further based on a first reference signal power value and a first path loss value.
12. The method of claim 11 , wherein the first path loss value is based on a layer 1 reference signal received power value.
13. The method of claim 8 , wherein the configuration parameters further comprise at least one of:
a channel state information reference signal;
a synchronization signal block; or
a demodulation reference signal for a physical broadcast channel.
14. The method of claim 8 , further comprising:
transmitting, before receiving the second preamble, a physical downlink control channel order to cause the wireless device to transmit the second preamble.
15. A method comprising:
receiving, by a wireless device from a base station, one or more radio resource control messages comprising configuration parameters, wherein the configuration parameters comprise:
a first target power value for beam failure recovery; and
a second target power value for random access;
detecting a failure of a first beam;
transmitting, based on the detecting and using a first transmission power that is based on the first target power value, a first preamble for beam failure recovery;
receiving a physical downlink control channel (PDCCH) order; and
transmitting, based on the PDCCH order and using a second transmission power that is based on the second target power value, a second preamble for random access.
16. The method of claim 15 , further comprising:
determining the first transmission power, wherein the determining the first transmission power comprises adding the first target power value and a power offset value indicated by a preamble format parameter.
17. The method of claim 15 , wherein the first transmission power is further based on a first reference signal power value and a first path loss value.
18. The method of claim 17 , wherein the first path loss value is based on a layer 1 reference signal received power value.
19. The method of claim 15 , wherein the configuration parameters further comprise at least one of:
a channel state information reference signal;
a synchronization signal block; or
a demodulation reference signal for a physical broadcast channel.
20. The method of claim 15 , further comprising:
based on the receiving the PDCCH order, selecting the second preamble.
21. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive, from a base station, one or more radio resource control messages comprising configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble received target power value for beam failure recovery associated with the cell; and
a second preamble received target power value for random access associated with the cell;
based on a beam failure of the cell, transmit, using a first transmission power that is based on the first preamble received target power value, a first preamble for beam failure recovery associated with the beam failure of the cell; and
transmit, via the cell and using a second transmission power that is based on the second preamble received target power value, a second preamble associated with random access.
22. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
determine the first transmission power based on adding the first preamble received target power value and a power offset value indicated by a preamble format parameter.
23. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
measure, based on one or more first reference signal resources, a beam link quality; and
determine, based on the measured beam link quality, the beam failure of the cell.
24. The wireless device of claim 21 , wherein the first transmission power is further based on a first reference signal power value and a first path loss value.
25. The wireless device of claim 24 , wherein the first path loss value is based on a layer 1 reference signal received power value.
26. The wireless device of claim 21 , wherein the configuration parameters further comprise at least one of:
a channel state information reference signal;
a synchronization signal block; or
a demodulation reference signal for a physical broadcast channel.
27. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to transmit the second preamble by:
transmitting, based on receiving a physical downlink control channel order, the second preamble.
28. A base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the base station to:
transmit, to a wireless device, one or more radio resource control messages comprising configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble received target power value for beam failure recovery associated with the cell; and
a second preamble received target power value for random access associated with the cell;
receive, from the wireless device, a first preamble for beam failure recovery associated with a beam failure of the cell, wherein a first transmission power of the first preamble is based on the first preamble received target power value; and
receive, via the cell and from the wireless device, a second preamble associated with random access, wherein a second transmission power of the second preamble is based on the second preamble received target power value.
29. The base station of claim 28 , wherein the first transmission power comprises a sum of the first preamble received target power value and a power offset value indicated by a preamble format parameter.
30. The base station of claim 28 , wherein the instructions, when executed by the one or more processors, cause the base station to:
determine, based on receiving the first preamble, the beam failure of the cell; and
transmit, after determining the beam failure of the cell, a signal associated with beam failure recovery.
31. The base station of claim 28 , wherein the first transmission power is further based on a first reference signal power value and a first path loss value.
32. The base station of claim 31 , wherein the first path loss value is based on a layer 1 reference signal received power value.
33. The base station of claim 28 , wherein the configuration parameters further comprise at least one of:
a channel state information reference signal;
a synchronization signal block; or
a demodulation reference signal for a physical broadcast channel.
34. The base station of claim 28 , wherein the instructions, when executed by the one or more processors, cause the base station to:
transmit, before receiving the second preamble, a physical downlink control channel order to cause the wireless device to transmit the second preamble.
35. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive, from a base station, one or more radio resource control messages comprising configuration parameters, wherein the configuration parameters comprise:
a first target power value for beam failure recovery; and
a second target power value for random access;
detect a failure of a first beam;
transmit, based on detecting and using a first transmission power that is based on the first target power value, a first preamble for beam failure recovery;
receive a physical downlink control channel (PDCCH) order; and
transmit, based on the PDCCH order and using a second transmission power that is based on the second target power value, a second preamble for random access.
36. The wireless device of claim 35 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
determine the first transmission power by adding the first target power value and a power offset value indicated by a preamble format parameter.
37. The wireless device of claim 35 , wherein the first transmission power is further based on a first reference signal power value and a first path loss value.
38. The wireless device of claim 37 , wherein the first path loss value is based on a layer 1 reference signal received power value.
39. The wireless device of claim 35 , wherein the configuration parameters further comprise at least one of:
a channel state information reference signal;
a synchronization signal block; or
a demodulation reference signal for a physical broadcast channel.
40. The wireless device of claim 35 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
based on receiving the PDCCH order, select the second preamble.
41. A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:
receive, from a base station, one or more radio resource control messages comprising configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble received target power value for beam failure recovery associated with the cell; and
a second preamble received target power value for random access associated with the cell;
based on a beam failure of the cell, transmit, using a first transmission power that is based on the first preamble received target power value, a first preamble for beam failure recovery associated with the beam failure of the cell; and
transmit, via the cell and using a second transmission power that is based on the second preamble received target power value, a second preamble associated with random access.
42. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the wireless device to:
determine the first transmission power based on adding the first preamble received target power value and a power offset value indicated by a preamble format parameter.
43. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the wireless device to:
measure, based on one or more first reference signal resources, a beam link quality; and
determine, based on the measured beam link quality, the beam failure of the cell.
44. The non-transitory computer-readable medium of claim 41 , wherein the first transmission power is further based on a first reference signal power value and a first path loss value.
45. The non-transitory computer-readable medium of claim 44 , wherein the first path loss value is based on a layer 1 reference signal received power value.
46. The non-transitory computer-readable medium of claim 41 , wherein the configuration parameters further comprise at least one of:
a channel state information reference signal;
a synchronization signal block; or
a demodulation reference signal for a physical broadcast channel.
47. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the wireless device to transmit the second preamble by:
transmitting, based on receiving a physical downlink control channel order, the second preamble.
48. A non-transitory computer-readable medium storing instructions that, when executed, configure a base station to:
transmit, to a wireless device, one or more radio resource control messages comprising configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble received target power value for beam failure recovery associated with the cell; and
a second preamble received target power value for random access associated with the cell;
receive, from the wireless device, a first preamble for beam failure recovery associated with a beam failure of the cell, wherein a first transmission power of the first preamble is based on the first preamble received target power value; and
receive, via the cell and from the wireless device, a second preamble associated with random access, wherein a second transmission power of the second preamble is based on the second preamble received target power value.
49. The non-transitory computer-readable medium of claim 48 , wherein the first transmission power comprises a sum of the first preamble received target power value and a power offset value indicated by a preamble format parameter.
50. The non-transitory computer-readable medium of claim 48 , wherein the instructions, when executed, further configure the base station to:
determine, based on receiving the first preamble, the beam failure of the cell; and
transmit, after determining the beam failure of the cell, a signal associated with beam failure recovery.
51. The non-transitory computer-readable medium of claim 48 , wherein the first transmission power is further based on a first reference signal power value and a first path loss value.
52. The non-transitory computer-readable medium of claim 51 , wherein the first path loss value is based on a layer 1 reference signal received power value.
53. The non-transitory computer-readable medium of claim 48 , wherein the configuration parameters further comprise at least one of:
a channel state information reference signal;
a synchronization signal block; or
a demodulation reference signal for a physical broadcast channel.
54. The non-transitory computer-readable medium of claim 48 , wherein the instructions, when executed, further configure the base station to:
transmit, before receiving the second preamble, a physical downlink control channel order to cause the wireless device to transmit the second preamble.
55. A system comprising:
a base station; and
a wireless device,
wherein the base station is configured to:
transmit, to the wireless device, one or more radio resource control messages comprising configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble received target power value for beam failure recovery associated with the cell; and
a second preamble received target power value for random access associated with the cell; and
wherein the wireless device is configured to:
based on a beam failure of the cell, transmit, using a first transmission power that is based on the first preamble received target power value, a first preamble for beam failure recovery associated with the beam failure of the cell; and
transmit, via the cell and using a second transmission power that is based on the second preamble received target power value, a second preamble associated with random access.
56. The system of claim 55 , wherein the wireless device is further configured to:
determine the first transmission power based on adding the first preamble received target power value and a power offset value indicated by a preamble format parameter.
57. The system of claim 55 , wherein the wireless device is further configured to:
measure, based on one or more first reference signal resources, a beam link quality; and
determine, based on the measured beam link quality, the beam failure of the cell.
58. The system of claim 55 , wherein the first transmission power is further based on a first reference signal power value and a first path loss value.
59. The system of claim 58 , wherein the first path loss value is based on a layer 1 reference signal received power value.
60. The system of claim 55 , wherein the configuration parameters further comprise at least one of:
a channel state information reference signal;
a synchronization signal block; or
a demodulation reference signal for a physical broadcast channel.
61. The system of claim 55 , wherein the wireless device is further configured to transmit the second preamble by:
transmitting, based on receiving a physical downlink control channel order, the second preamble.
62. The system of claim 55 , wherein the base station is further configured to:
determine, based on receiving the first preamble, the beam failure of the cell; and
transmit, after determining the beam failure of the cell, a signal associated with beam failure recovery.
63. The system of claim 55 , wherein the base station is further configured to:
transmit, before receiving the second preamble, a physical downlink control channel order to cause the wireless device to transmit the second preamble.