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, configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble power parameter for beam failure recovery associated with the cell; and
a second preamble power parameter for random access associated with the cell;
based on a beam failure of the cell, transmitting, via a first random access channel and using a first transmission power that is based on the first preamble power parameter, a first preamble for beam failure recovery associated with the beam failure of the cell; and
transmitting, via a second random access channel of the cell and using a second transmission power that is based on the second preamble power parameter, a second preamble associated with random access.
2. The method of claim 1 , further comprising:
determining the first transmission power based on a sum of:
a power value associated with the first preamble power parameter; and
a power offset value indicated by a preamble format parameter.
3. The method of claim 1 , further comprising:
determining, based on one or more first reference signal resources, a beam link quality; and
determining, based on the 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 receiving the configuration parameters comprises receiving one or more messages comprising the configuration parameters, and
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 , further comprising receiving a physical downlink control channel order,
wherein the transmitting the second preamble comprises:
transmitting, based on the physical downlink control channel order, the second preamble.
8. The method of claim 1 , wherein the transmitting the second preamble comprises:
transmitting the second preamble for an initial access procedure.
9. The method of claim 1 , wherein the configuration parameters further comprise at least one of:
a non-contention-based random access channel resource associated with the first random access channel; and
a contention-based random access channel resource associated with the second random access channel,
wherein the transmitting the first preamble comprises transmitting, based on the non-contention-based random access channel resource, the first preamble, and
wherein the transmitting the second preamble comprises transmitting, based on the contention-based random access channel resource, the second preamble.
10. A method comprising:
transmitting, by a base station, configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble power parameter for beam failure recovery associated with the cell; and
a second preamble power parameter for random access associated with the cell;
receiving, from a wireless device and via a first random access channel, 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 power parameter; and
receiving, via a second random access channel of 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 power parameter.
11. The method of claim 10 , wherein the first transmission power comprises a sum of a power value associated with the first preamble power parameter and a power offset value indicated by a preamble format parameter.
12. The method of claim 10 , further comprising:
determining, based on 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.
13. The method of claim 10 , wherein the first transmission power is further based on a first reference signal power value and a first path loss value.
14. The method of claim 13 , wherein the first path loss value is based on a layer 1 reference signal received power value.
15. The method of claim 10 , wherein the transmitting the configuration parameters comprises transmitting one or more messages comprising the configuration parameters, and
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.
16. The method of claim 10 , further comprising:
transmitting, before receiving the second preamble, a physical downlink control channel order to cause the wireless device to transmit the second preamble.
17. The method of claim 10 , wherein the receiving the second preamble comprises:
receiving the second preamble for an initial access procedure.
18. The method of claim 10 , wherein the configuration parameters further comprise at least one of:
a non-contention-based random access channel resource associated with the first random access channel; and
a contention-based random access channel resource associated with the second random access channel,
wherein the receiving the first preamble comprises receiving, based on the non-contention-based random access channel resource, the first preamble, and
wherein the receiving the second preamble comprises receiving, based on the contention-based random access channel resource, the second preamble.
19. 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 configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble power parameter for beam failure recovery associated with the cell; and
a second preamble power parameter for random access associated with the cell;
based on a beam failure of the cell, transmit, via a first random access channel and using a first transmission power that is based on the first preamble power parameter, a first preamble for beam failure recovery associated with the beam failure of the cell; and
transmit, via a second random access channel of the cell and using a second transmission power that is based on the second preamble power parameter, a second preamble associated with random access.
20. The wireless device of claim 19 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
determine the first transmission power based on a sum of:
a power value associated with the first preamble power parameter; and
a power offset value indicated by a preamble format parameter.
21. The wireless device of claim 19 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
determine, based on one or more first reference signal resources, a beam link quality; and
determine, based on the beam link quality, the beam failure of the cell.
22. The wireless device of claim 19 , wherein the first transmission power is further based on a first reference signal power value and a first path loss value.
23. The wireless device of claim 22 , wherein the first path loss value is based on a layer 1 reference signal received power value.
24. The wireless device of claim 19 , wherein the instructions, when executed by the one or more processors, cause the wireless device to receive the configuration parameters by receiving one or more messages comprising the configuration parameters, and
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.
25. The wireless device of claim 19 , wherein the instructions, when executed by the one or more processors, cause the wireless device to receive a physical downlink control channel order, and
wherein the instructions, when executed by the one or more processors, cause the wireless device to transmit the second preamble by transmitting, based on the physical downlink control channel order, the second preamble.
26. The wireless device of claim 19 , wherein the second preamble is for an initial access procedure.
27. The wireless device of claim 19 , wherein the configuration parameters further comprise at least one of:
a non-contention-based random access channel resource associated with the first random access channel; and
a contention-based random access channel resource associated with the second random access channel,
wherein the instructions, when executed by the one or more processors, cause the wireless device to transmit the first preamble by transmitting, based on the non-contention-based random access channel resource, the first preamble, and
wherein the instructions, when executed by the one or more processors, cause the wireless device to transmit the second preamble by transmitting, based on the contention-based random access channel resource, 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 configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble power parameter for beam failure recovery associated with the cell; and
a second preamble power parameter for random access associated with the cell;
receive, from a wireless device and via a first random access channel, 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 power parameter; and
receive, via a second random access channel of 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 power parameter.
29. The base station of claim 28 , wherein the first transmission power comprises a sum of a power value associated with the first preamble power parameter 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 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 instructions, when executed by the one or more processors, cause the base station to transmit the configuration parameters by transmitting one or more messages comprising the configuration parameters, and
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. The base station of claim 28 , wherein the second preamble is for an initial access procedure.
36. The base station of claim 28 , wherein the configuration parameters further comprise at least one of:
a non-contention-based random access channel resource associated with the first random access channel; and
a contention-based random access channel resource associated with the second random access channel,
wherein the instructions, when executed by the one or more processors, cause the base station to receive the first preamble by receiving, based on the non-contention-based random access channel resource, the first preamble, and
wherein the instructions, when executed by the one or more processors, cause the base station to receive the second preamble by receiving, based on the contention-based random access channel resource, the second preamble.
37. A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:
receive configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble power parameter for beam failure recovery associated with the cell; and
a second preamble power parameter for random access associated with the cell;
based on a beam failure of the cell, transmit, via a first random access channel and using a first transmission power that is based on the first preamble power parameter, a first preamble for beam failure recovery associated with the beam failure of the cell; and
transmit, via a second random access channel of the cell and using a second transmission power that is based on the second preamble power parameter, a second preamble associated with random access.
38. The non-transitory computer-readable medium of claim 37 , wherein the instructions, when executed, further configure the wireless device to:
determine the first transmission power based on a sum of:
a power value associated with the first preamble power parameter; and
a power offset value indicated by a preamble format parameter.
39. The non-transitory computer-readable medium of claim 37 , wherein the instructions, when executed, further configure the wireless device to:
determine, based on one or more first reference signal resources, a beam link quality; and
determine, based on the beam link quality, the beam failure of the cell.
40. The non-transitory computer-readable medium of claim 37 , wherein the first transmission power is further based on a first reference signal power value and a first path loss value.
41. The non-transitory computer-readable medium of claim 40 , wherein the first path loss value is based on a layer 1 reference signal received power value.
42. The non-transitory computer-readable medium of claim 37 , wherein the instructions, when executed, configure the wireless device to receive the configuration parameters by receiving one or more messages comprising the configuration parameters, and
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.
43. The non-transitory computer-readable medium of claim 37 , wherein the instructions, when executed, further configure the wireless device to receive a physical downlink control channel order, and
wherein the instructions, when executed, configure the wireless device to transmit the second preamble by transmitting, based on the physical downlink control channel order, the second preamble.
44. The non-transitory computer-readable medium of claim 37 , wherein the second preamble is for an initial access procedure.
45. The non-transitory computer-readable medium of claim 37 , wherein the configuration parameters further comprise at least one of:
a non-contention-based random access channel resource associated with the first random access channel; and
a contention-based random access channel resource associated with the second random access channel,
wherein the instructions, when executed, configure the wireless device to transmit the first preamble by transmitting, based on the non-contention-based random access channel resource, the first preamble, and
wherein the instructions, when executed, configure the wireless device to transmit the second preamble by transmitting, based on the contention-based random access channel resource, the second preamble.
46. A non-transitory computer-readable medium storing instructions that, when executed, configure a base station to:
transmit configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble power parameter for beam failure recovery associated with the cell; and
a second preamble power parameter for random access associated with the cell;
receive, from a wireless device and via a first random access channel, 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 power parameter; and
receive, via a second random access channel of 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 power parameter.
47. The non-transitory computer-readable medium of claim 46 , wherein the first transmission power comprises a sum of a power value associated with the first preamble power parameter and a power offset value indicated by a preamble format parameter.
48. The non-transitory computer-readable medium of claim 46 , wherein the instructions, when executed, further configure the base station to:
determine, based on 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.
49. The non-transitory computer-readable medium of claim 46 , wherein the first transmission power is further based on a first reference signal power value and a first path loss value.
50. The non-transitory computer-readable medium of claim 49 , wherein the first path loss value is based on a layer 1 reference signal received power value.
51. The non-transitory computer-readable medium of claim 46 , wherein the instructions, when executed, configure the base station to transmit the configuration parameters by transmitting one or more messages comprising the configuration parameters, and
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.
52. The non-transitory computer-readable medium of claim 46 , 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.
53. The non-transitory computer-readable medium of claim 46 , wherein the second preamble is for an initial access procedure.
54. The non-transitory computer-readable medium of claim 46 , wherein the configuration parameters further comprise at least one of:
a non-contention-based random access channel resource associated with the first random access channel; and
a contention-based random access channel resource associated with the second random access channel,
wherein the instructions, when executed, configure the base station to receive the first preamble by receiving, based on the non-contention-based random access channel resource, the first preamble, and
wherein the instructions, when executed, configure the base station to receive the second preamble by receiving, based on the contention-based random access channel resource, the second preamble.
55. A system comprising:
a base station; and
a wireless device;
wherein the base station is configured to:
transmit configuration parameters of a cell, wherein the configuration parameters comprise:
a first preamble power parameter for beam failure recovery associated with the cell; and
a second preamble power parameter for random access associated with the cell; and
wherein the wireless device is configured to:
based on a beam failure of the cell, transmit, via a first random access channel and using a first transmission power that is based on the first preamble power parameter, a first preamble for beam failure recovery associated with the beam failure of the cell; and
transmit, via a second random access channel of the cell and using a second transmission power that is based on the second preamble power parameter, 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 a sum of:
a power value associated with the first preamble power parameter; 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:
determine, based on one or more first reference signal resources, a beam link quality; and
determine, based on the 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 base station is configured to transmit the configuration parameters by transmitting one or more messages comprising the configuration parameters, and
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 base station is further configured to transmit a physical downlink control channel order, and
wherein the wireless device is configured to transmit the second preamble by transmitting, based on the physical downlink control channel order, the second preamble.
62. The system of claim 55 , wherein the second preamble is for an initial access procedure.
63. The system of claim 55 , wherein the configuration parameters further comprise at least one of:
a non-contention-based random access channel resource associated with the first random access channel; and
a contention-based random access channel resource associated with the second random access channel,
wherein the wireless device is configured to transmit the first preamble by transmitting, based on the non-contention-based random access channel resource, the first preamble, and
wherein the wireless device is configured to transmit the second preamble by transmitting, based on the contention-based random access channel resource, the second preamble.
64. The system of claim 55 , wherein the base station is further configured to:
determine, based on 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.