Downlink and uplink channel transmission and monitoring in a wireless network
A wireless device receives one or more radio resource control (RRC) messages comprising configuration parameters for a first licensed assisted access (LAA) cell and a second LAA cell. The wireless device selectively monitors, in a first subframe, a downlink physical control channel (PDCCH) on a first LAA cell, depending on whether there is an uplink transmission in the first subframe on the second LAA cell.
1. A method comprising:
receiving, by a wireless device, one or more radio resource control (RRC) messages comprising configuration parameters for a first licensed assisted access (LAA) cell and a second LAA cell;
transmitting an uplink transmission during a subframe via the second LAA cell; and
based on the uplink transmission during the subframe via the second LAA cell, skipping monitoring of a physical downlink control channel (PDCCH) during the subframe for the first LAA cell.
2. The method of claim 1 , wherein the uplink transmission is a physical uplink shared channel (PUSCH) transmission.
3. The method of claim 1 , wherein the PDCCH is an enhanced PDCCH.
4. The method of claim 1 , wherein the first LAA cell and the second LAA cell belong to a first cell group.
5. The method of claim 4 , wherein the first cell group comprises a plurality of cells that operate in a first frequency band.
6. The method of claim 4 , wherein the one or more RRC messages further comprise one or more configuration parameters of the first cell group.
7. The method of claim 1 , wherein the subframe for the second LAA cell is a partial uplink subframe.
8. The method of claim 1 , wherein the subframe for the second LAA cell is a full uplink subframe.
9. The method of claim 1 , wherein the first LAA cell and the second LAA cell operate according to frame structure Type 3.
10. 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 one or more radio resource control (RRC) messages comprising configuration parameters for a first licensed assisted access (LAA) cell and a second LAA cell;
transmit an uplink transmission during a subframe via the second LAA cell; and
based on the uplink transmission during the subframe via the second LAA cell, skip monitoring of a physical downlink control channel (PDCCH) during the subframe for a first LAA cell.
11. The wireless device of claim 10 , wherein the uplink transmission is a physical uplink shared channel (PUSCH) transmission.
12. The wireless device of claim 10 , wherein the PDCCH is an enhanced PDCCH.
13. The wireless device of claim 10 , wherein the first LAA cell and the second LAA cell belong to a first cell group.
14. The wireless device of claim 13 , wherein the first cell group comprises a plurality of cells, that operate in a first frequency band.
15. The wireless device of claim 13 , wherein the one or more RRC messages further comprise one or more configuration parameters of the first cell group.
16. The wireless device of claim 10 , wherein the subframe for the second LAA cell is a partial uplink subframe.
17. The wireless device of claim 10 , wherein the subframe for the second LAA cell is a full uplink subframe.
18. The wireless device of claim 10 , wherein the first LAA cell and the second LAA cell operate according to frame structure Type 3.
19. The method of claim 1 , further comprising:
based on an uplink transmission not occurring during a subframe for the second LAA cell, monitoring the PDCCH during the subframe for the first LAA cell.
20. The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to monitor, based on an uplink transmission not occurring during a subframe for the second LAA cell, the PDCCH during the subframe for the first LAA cell.
21. A system comprising:
a first device; and
a second device;
wherein the first device comprises:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the first device to:
transmit, to the second device, one or more radio resource control (RRC) messages comprising configuration parameters for a first licensed assisted access (LAA) cell and a second LAA cell; and
wherein the second device comprises:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the second device to:
transmit an uplink transmission during a subframe via the second LAA cell; and
based on the uplink transmission during the subframe for the second LAA cell, skip monitoring of a physical downlink control channel (PDCCH) during the subframe for the first LAA cell.
22. The system of claim 21 , wherein the uplink transmission is a physical uplink shared channel (PUSCH) transmission.
23. The system of claim 21 , wherein the PDCCH is an enhanced PDCCH.
24. The system of claim 21 , wherein the first LAA cell and the second LAA cell belong to a first cell group.
25. The system of claim 24 , wherein the first cell group comprises a plurality of cells that operate in a first frequency band.
26. The system of claim 24 , wherein the one or more RRC messages further comprise one or more configuration parameters of the first cell group.
27. The system of claim 21 , wherein the subframe for the second LAA cell is a partial uplink subframe.
28. The system of claim 21 , wherein the subframe for the second LAA cell is a full uplink subframe.
29. The system of claim 21 , wherein the first LAA cell and the second LAA cell operate according to frame structure Type 3.
30. The system of claim 21 , wherein the instructions, when executed by the one ore more processors of the second device, cause the second device to monitor, based on an uplink transmission not occurring during a subframe for the second LAA cell, the PDCCH during the subframe for the first LAA cell.