Multi-carrier power headroom reporting
A wireless device receives a first parameter indicating whether simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission is configured for a primary cell of a plurality of cells. The plurality of cells comprise the primary cell and a PUCCH secondary cell. Based on the first parameter and the PUCCH secondary cell being deactivated, a first power headroom (PH) comprising a first Type 2 PH field for the primary cell is transmitted. Independent of the first parameter and based on the PUCCH secondary cell being activated, a second PH report comprising a second Type 2 PH field for the primary cell is transmitted.
1. A method comprising:
receiving, by a wireless device, a first parameter indicating whether simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission is configured for a primary cell of a plurality of cells, the plurality of cells comprising the primary cell and a PUCCH secondary cell;
based on the first parameter and the PUCCH secondary cell being deactivated, transmitting a first power headroom (PH) report comprising a first Type 2 PH field for the primary cell; and
independent of the first parameter and based on the PUCCH secondary cell being activated, transmitting a second PH report comprising a second Type 2 PH field for the primary cell.
2. The method of claim 1 , further comprising receiving a second parameter indicating that simultaneous PUCCH and PUSCH transmission is configured for the PUCCH secondary cell (SCell), wherein:
the first PH report comprises no Type 2 PH field for the PUCCH SCell; and
the second PH report comprises a third Type 2 PH field for the PUCCH SCell.
3. The method of claim 1 , further comprising receiving a second parameter indicating that simultaneous PUCCH and PUSCH transmission is configured for the PUCCH secondary cell (SCell), wherein the second PH report comprises a third Type 2 PH field for the PUCCH SCell.
4. The method of claim 1 , further comprising receiving a second parameter indicating that simultaneous PUCCH and PUSCH transmission is not configured for the PUCCH secondary cell (SCell), wherein the second PH report comprises a third Type 2 PH field for the PUCCH SCell.
5. The method of claim 4 , further comprising receiving an activation command indicating activation of the PUCCH secondary cell prior to the transmitting of the second PH report.
6. The method of claim 4 , further comprising:
measuring, by the wireless device, one or more path loss values employing signals received on one or more pathloss reference cells; and
determining one or more fields of the first PH report employing the one or more path loss values.
7. The method of claim 6 , further comprising determining one or more fields of the second PH report employing the one or more path loss values.
8. The method of claim 7 , wherein a first media access control (MAC) control element (CE) comprising the first PH report is identified by a subheader, the subheader comprising:
a logical channel identifier (LCID) field; and
a length field.
9. The method of claim 8 , wherein the first PH report comprises one or more Type 1 power headroom fields.
10. The method of claim 4 , wherein a first media access control (MAC) control element (CE) comprising the first PH report is identified by a subheader, the subheader comprising:
a logical channel identifier (LCID) field; and
a length field.
11. The method of claim 4 , wherein the first PH report is configured to be employed by a base station for at least one of uplink packet scheduling or uplink power control.
12. The method of claim 1 , further comprising receiving an activation command indicating activation of the PUCCH secondary cell prior to the transmitting of the second PH report.
13. The method of claim 1 , further comprising:
measuring, by the wireless device, one or more path loss values employing signals received on one or more pathloss reference cells; and
calculating one or more fields of the first PH report employing the one or more path loss values.
14. The method of claim 13 , further comprising calculating one or more fields of the second PH report employing the one or more path loss values.
15. The method of claim 14 , wherein a first media access control (MAC) control element (CE) comprising the first PH report is identified by a subheader, the subheader comprising:
a logical channel identifier (LCID) field; and
a length field.
16. The method of claim 15 , wherein the first PH report comprises one or more Type 1 power headroom fields.
17. The method of claim 1 , wherein a first media access control (MAC) control element (CE) comprising the first PH report is identified by a subheader, the subheader comprising:
a logical channel identifier (LCID) field; and
a length field.
18. The method of claim 1 , wherein the first PH report is configured to be employed by a base station for at least one of uplink packet scheduling or uplink power control.
19. A method comprising:
receiving, by a wireless device, a first parameter indicating that simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission is not configured for a primary cell of a plurality of cells, the plurality of cells comprising the primary cell and a PUCCH secondary cell; and
based on the PUCCH secondary cell being activated, transmitting a PH report comprising a first Type 2 PH field for the primary cell while the simultaneous PUCCH and PUSCH transmission is not configured for the primary cell.
20. The method of claim 19 , further comprising receiving a second parameter indicating whether simultaneous PUCCH and PUSCH transmission is configured for the PUCCH secondary cell (SCell), wherein the PH report comprises a second Type 2 PH for the PUCCH SCell.