Downlink and uplink channel transmission and monitoring in a wireless network

• US 10,548,121 B2
• Filed: 01/30/2017
• Issued: 01/28/2020
• Est. Priority Date: 02/03/2016
• Status: Active Grant

• Current Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Original Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Inventors: Dinan, Esmael Hejazi, Babaei, Alireza
• Primary Examiner(s): Taha, Shukri
• Application Number:
  US15/419,445
• Publication Number:
  US 20170223676A1
• Time in Patent Office: 1,093 Days
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

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.

Claims

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.

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.

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.

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.