Multi-carrier power headroom in a wireless network
View Patent ↗A wireless device receives message(s) comprising parameters indicating whether simultaneous PUCCH and PUSCH transmission is configured for a primary cell and for a PUCCH SCell. The wireless device transmits a power headroom (PH) report. If the PUCCH SCell is activated, the PH report comprises a first Type 2 PH field for the primary cell and a second Type 2 PH field for the PUCCH SCell. Otherwise, if simultaneous PUCCH and PUSCH transmission is configured for the primary cell, the PH report comprises the first Type 2 PH field for the primary cell and no PH field for the PUCCH SCell.
1. A method comprising:
receiving, by a wireless device, at least one message comprising:
a first parameter indicating whether simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission is configured for a primary cell; and
a second parameter indicating whether simultaneous PUCCH and PUSCH transmission is configured for a PUCCH secondary cell (SCell); and
transmitting a power headroom (PH) report, wherein:
in response to the PUCCH SCell being activated, the PH report comprises a first Type 2 PH field for the primary cell and a second Type 2 PH field for the PUCCH SCell, independent of whether simultaneous PUCCH and PUSCH transmission is configured or not configured for the primary cell or the PUCCH SCell; and
in response to the PUCCH SCell being deactivated and simultaneous PUCCH and PUSCH transmission being configured for the primary cell, the PH report comprises the first Type 2 PH field for the primary cell and no PH field for the PUCCH SCell.
2. 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 PH report employing the one or more path loss values.
3. The method of claim 1 , wherein a media access control (MAC) control element (CE) comprising the PH report is identified by a subheader, the subheader comprising:
a logical channel identifier (LCID) field; and
a length field.
4. The method of claim 1 , wherein the PH report comprises one or more Type 1 power headroom fields.
5. The method of claim 4 , further comprising:
calculating a Type 2 power headroom level employing:
a PUCCH calculated power; and
a PUSCH calculated power; and
calculating a Type 1 power headroom level employing the PUSCH calculated power.
6. The method of claim 1 , wherein the PH report is configured to be employed by a base station for at least one of uplink packet scheduling or uplink power control.
7. The method of claim 1 , wherein the at least one message comprises configuration parameters of a plurality of cells, the plurality of cells grouped into a plurality of PUCCH groups comprising:
a primary PUCCH group comprising the primary cell; and
a secondary PUCCH group comprising the PUCCH SCell.
8. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed, cause the wireless device to:
receive at least one message comprising:
a first parameter indicating whether simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission is configured for a primary cell; and
a second parameter indicating whether simultaneous PUCCH and PUSCH transmission is configured for a PUCCH secondary cell (SCell); and
transmit a power headroom (PH) report, wherein:
in response to the PUCCH SCell being activated, the PH report comprises a first Type 2 PH field for the primary cell and a second Type 2 PH field for the PUCCH SCell, independent of whether simultaneous PUCCH and PUSCH transmission is configured or not configured for the primary cell or the PUCCH SCell; and
in response to the PUCCH SCell being deactivated and simultaneous PUCCH and PUSCH transmission being configured for the primary cell, the PH report comprises the first Type 2 PH field for the primary cell and no PH field for the PUCCH SCell.
9. The wireless device of claim 8 , wherein the instructions, when executed, further cause the wireless device to:
measure one or more pathloss values employing signals received on one or more path loss reference cells; and
calculate one or more fields of the PH report employing the one or more path loss values.
10. The wireless device of claim 8 , wherein a media access control (MAC) control element (CE) comprising the PH report is identified by a subheader, the subheader comprising:
a logical channel identifier (LCID) field; and
a length field.
11. The wireless device of claim 8 , wherein the PH report comprises one or more Type 1 power headroom fields.
12. The wireless device of claim 11 , wherein the instructions, when executed, further cause the wireless device to:
calculate a Type 2 power headroom level employing:
a PUCCH calculated power; and
a PUSCH calculated power; and
calculate a Type 1 power headroom level employing the PUSCH calculated power.
13. The wireless device of claim 8 , wherein the PH report is configured to be employed by a base station for at least one of uplink packet scheduling or uplink power control.
14. The wireless device of claim 8 , wherein the at least one message comprises configuration parameters of a plurality of cells, the plurality of cells grouped into a plurality of PUCCH groups comprising:
a primary PUCCH group comprising the primary cell; and
a secondary PUCCH group comprising the PUCCH SCell.
15. A method comprising:
transmitting, by a base station to a wireless device, at least one message comprising:
a first parameter indicating whether simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission is configured for a primary cell; and
a second parameter indicating whether simultaneous PUCCH and PUSCH transmission is configured for a PUCCH secondary cell (SCell);
receiving, from the wireless device, a power headroom (PH) report, wherein:
in response to the PUCCH SCell being activated, the PH report comprises a first Type 2 PH field for the primary cell and a second Type 2 PH field for the PUCCH SCell, independent of whether simultaneous PUCCH and PUSCH transmission is configured or not configured for the primary cell or the PUCCH SCell; and
in response to the PUCCH SCell being deactivated and simultaneous PUCCH and PUSCH transmission being configured for the primary cell, the PH report comprises the first Type 2 PH field for the primary cell and no PH field for the PUCCH SCell.
16. The method of claim 15 , wherein a media access control (MAC) control element (CE) comprising the PH report is identified by a subheader, the subheader comprising:
a logical channel identifier (LCID) field; and
a length field.
17. The method of claim 15 , wherein the PH report comprise one or more Type 1 power headroom fields.
18. The method of claim 17 , further comprising:
calculating a Type 2 power headroom level employing:
a PUCCH calculated power; and
a PUSCH calculated power; and
a calculation of a Type 1 power headroom level employing the PUSCH calculated power.
19. The method of claim 15 , further comprising transmitting, to the wireless device, one or more power control commands employing at least a PH report MAC CE.
20. The method of claim 15 , wherein the at least one message further comprises configuration parameters of a plurality of cells, the plurality of cells grouped into a plurality of PUCCH groups comprising:
a primary PUCCH group comprising the primary cell; and
a secondary PUCCH group comprising the PUCCH SCell.