Radio link issues in a carrier aggregation
View Patent ↗A base station transmits to a wireless device at least one first message comprising configuration parameters of a plurality of cells. The plurality of cells is grouped into a plurality of physical uplink control channel (PUCCH) groups comprising a primary PUCCH group comprising a primary cell with a primary PUCCH received by the base station and a secondary PUCCH group. The secondary PUCCH group comprising a PUCCH secondary cell with a secondary PUCCH received by the base station and one or more other secondary cells. The base station detects a radio link issue with the PUCCH secondary cell. The base station transmits at least one media access control (MAC) command configured to deactivate at least one of the one or more other secondary cells in the secondary PUCCH group in response to the radio link issue with the PUCCH secondary cell.
1. A method comprising:
transmitting, by a base station to a wireless device, at least one first message comprising configuration parameters of a plurality of cells, wherein the plurality of cells are grouped into a plurality of physical uplink control channel (PUCCH) groups comprising:
a primary PUCCH group comprising a primary cell with a primary PUCCH received by the base station; and
a secondary PUCCH group comprising:
a PUCCH secondary cell with a secondary PUCCH received by the base station; and
one or more other secondary cells;
detecting a radio link issue with the PUCCH secondary cell; and
transmitting at least one media access control (MAC) command configured to deactivate at least one of the one or more other secondary cells in the secondary PUCCH group in response to the radio link issue with the PUCCH secondary cell.
2. The method of claim 1 , wherein the at least one MAC command is further configured to deactivate the PUCCH secondary cell.
3. The method of claim 1 , wherein the one or more other secondary cells have acceptable radio link quality.
4. The method of claim 1 , wherein the detecting the radio link issue is based at least on one of the following:
detecting a loss of PUCCH secondary cell signals;
detecting a loss of synchronization with the PUCCH secondary cell signals; and
measuring an error rate on the PUCCH secondary cell above a second value.
5. The method of claim 1 , wherein the detecting the radio link issue is based at least on one of the following:
measuring an interference on the PUCCH secondary cell above a second value;
receiving a channel quality indicator (CQI) feedback indicating a signal quality on the PUCCH secondary cell lower than a third value; and
receiving measurement reports indicating a signal quality on the PUCCH secondary cell lower than a fourth value.
6. The method of claim 1 , wherein the detecting the radio link issue occurs when the base station receives a third message from the wireless device.
7. The method of claim 1 , wherein the at least one MAC command comprises a bitmap indicating deactivation of the at least one of the one or more other secondary cells.
8. 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, at least one first message comprising configuration parameters of a plurality of cells, wherein the plurality of cells are grouped into a plurality of physical uplink control channel (PUCCH) groups comprising:
a primary PUCCH group comprising a primary cell with a primary PUCCH received by the base station; and
a secondary PUCCH group comprising:
a PUCCH secondary cell with a secondary PUCCH received by the base station; and
one or more other secondary cells;
detect a radio link issue with the PUCCH secondary cell; and
transmit at least one MAC command configured to deactivate at least one of the one or more other secondary cells in the secondary PUCCH group in response to the radio link issue with the PUCCH secondary cell.
9. The base station of claim 8 , wherein the at least one MAC command is further configured to deactivate the PUCCH secondary cell.
10. The base station of claim 8 , wherein the one or more other secondary cells have acceptable radio link quality.
11. The base station of claim 8 , wherein the instructions, when executed, further cause the base station to:
detect a loss of PUCCH secondary cell signals;
detect a loss of synchronization with the PUCCH secondary cell signals; or
measure an error rate on the PUCCH secondary cell above a second value.
12. The base station of claim 8 , wherein the instructions, when executed, further cause the base station to:
measure an interference on the PUCCH secondary cell above a second value;
receive a channel quality indicator (CQI) feedback indicating a signal quality on the PUCCH secondary cell lower than a third value; or
receiving measurement reports indicating a signal quality on the PUCCH secondary cell lower than a fourth value.
13. The base station of claim 8 , wherein the base station detects the radio link issue when the base station receives a third message from the wireless device.
14. A method comprising:
transmitting, by a base station to a wireless device, at least one first message comprising configuration parameters of a plurality of cells, wherein the plurality of cells are grouped into a plurality of physical uplink control channel (PUCCH) groups comprising:
a primary PUCCH group comprising a primary cell with a primary PUCCH received by the base station; and
a secondary PUCCH group comprising:
a PUCCH secondary cell with a secondary PUCCH received by the base station; and
one or more other secondary cells;
detecting a radio link issue with the PUCCH secondary cell; and
transmitting at least one second message configured to release at least one of the one or more other secondary cells in the secondary PUCCH group in response to the radio link issue with the PUCCH secondary cell.
15. The method of claim 14 , wherein the at least one second message is further configured to release the PUCCH secondary cell.
16. The method of claim 14 , wherein the one or more other secondary cells have acceptable radio link quality.
17. The method of claim 14 , wherein the detecting the radio link issue is based at least on one of the following:
detecting a loss of PUCCH secondary cell signals;
detecting a loss of synchronization with the PUCCH secondary cell signals; and
measuring an error rate on the PUCCH secondary cell above a first value.
18. The method of claim 14 , wherein the detecting the radio link issue is based at least on one of the following:
measuring an interference on the PUCCH secondary cell above a second value;
receiving a channel quality indicator (CQI) feedback indicating a signal quality on the PUCCH secondary cell lower than a third value; and
receiving measurement reports indicating a signal quality on the PUCCH secondary cell lower than a fourth value.
19. The method of claim 14 , wherein the detecting the radio link issue occurs when the base station receives a third message from the wireless device.
20. The method of claim 14 , wherein the transmitting the at least one second message comprises at least one cell index of the at least one of the one or more other secondary cells.