Type 2 power headroom of a primary cell
A base station transmits, to a wireless device, at least one message comprising configuration parameters of a plurality of cells. The plurality of cells comprise a primary cell and one or more secondary cells. The base station receives, from the wireless device, a power headroom report (PHR). The PHR comprises a Type 2 power headroom of the primary cell in response to a licensed assisted access cell, of the one or more secondary cells, having an uplink that is configured and activated.
1. A method comprising:
transmitting, by a base station to a wireless device, at least one radio resource control RRC) message comprising configuration parameters of a primary cell and at least one licensed assisted access cell with an uplink;
transmitting, to the wireless device, a medium access control control element (MAC CE) activation/deactivation (A/D) command indicating activation of the at least one licensed assisted access cell; and
receiving, from the wireless device, a power headroom report (PHR), wherein the PHR comprises a Type 2 power headroom of the primary cell in response to the at least one licensed assisted access cell with the uplink being configured and activated.
2. The method of claim 1 , wherein the PHR further comprises a Type 1 power headroom field for the primary cell.
3. The method of claim 1 , wherein the at least one RRC message further comprises at least one parameter indicating that an extended PHR is configured.
4. The method of claim 3 , wherein the at least one RRC message further comprises a first information element indicating whether a simultaneous physical uplink control channel transmission and a physical uplink shared channel transmission are configured for the primary cell.
5. The method of claim 1 , wherein a Type 2 power headroom level for the Type 2 power headroom is determined based on:
a power of a physical uplink control channel; and
a power of a physical uplink shared channel.
6. The method of claim 5 , wherein a Type 1 power headroom level for a Type 1 power headroom is determined based on the power of the physical uplink shared channel.
7. The method of claim 1 , wherein a Type 2 power headroom level for the Type 2 power headroom is determined based on a measurement of a pathloss reference.
8. The method of claim 1 , wherein the PHR comprises the Type 2 power headroom in response to a simultaneous physical uplink control channel and a physical uplink shared channel being configured.
9. The method of claim 1 , wherein the PHR comprises the Type 2 power headroom in response to a secondary cell comprising a physical uplink control channel secondary cell being configured and activated.
10. The method of claim 1 , further comprising transmitting channel state information of the at least one licensed assisted access cell via an uplink channel of the primary cell.
11. A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a base station, cause the base station to:
transmit, to a wireless device, at least one radio resource control (RRC) message comprising configuration parameters of a primary cell and at least one licensed assisted access cell with an uplink;
transmit, to the wireless device, a medium access control control element (MAC CE) activation/deactivation (A/D) command indicating activation of the at least one licensed assisted access cell; and
receive, from the wireless device, a power headroom report (PHR), wherein the PHR comprises a Type 2 power headroom of the primary cell in response to the at least one licensed assisted access cell with the uplink being configured and activated.
12. The non-transitory computer-readable medium of claim 11 , wherein the PHR further comprises a Type 1 power headroom field for the primary cell.
13. The non-transitory computer-readable medium of claim 11 , wherein the at least one RRC message further comprises at least one parameter indicating that an extended PHR is configured.
14. The non-transitory computer-readable medium of claim 13 , wherein the at least one RRC message further comprises a first information element indicating whether a simultaneous physical uplink control channel transmission and a physical uplink shared channel transmission are configured for the primary cell.
15. The non-transitory computer-readable medium of claim 11 , wherein a Type 2 power headroom level for the Type 2 power headroom is determined based on:
a power of a physical uplink control channel; and
a power of a physical uplink shared channel.
16. The non-transitory computer-readable medium of claim 15 , wherein a Type 1 power headroom level for a Type 1 power headroom is determined based on the power of the physical uplink shared channel.
17. The non-transitory computer-readable medium of claim 11 , wherein a Type 2 power headroom level for the Type 2 power headroom is determined based on a measurement of a pathloss reference.
18. The non-transitory computer-readable medium of claim 11 , wherein the PHR comprises the Type 2 power headroom in response to a simultaneous physical uplink control channel and a physical uplink shared channel being configured.
19. The non-transitory computer-readable medium of claim 11 , wherein the PHR comprises the Type 2 power headroom in response to a secondary cell comprising a physical uplink control channel secondary cell being configured and activated.
20. The non-transitory computer-readable medium of claim 11 , wherein the instructions further cause the base station to transmit channel state information of the at least one licensed assisted access cell via an uplink channel of the primary cell.