Scheduling request on a secondary cell of a wireless device

• US 10,637,628 B2
• Filed: 11/02/2018
• Issued: 04/28/2020
• Est. Priority Date: 06/12/2015
• Status: Active Grant

• Current Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Original Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Inventors: Dinan, Esmael Hejazi
• Primary Examiner(s): Ho, Chuong T
• Application Number:
  US16/179,465
• Publication Number:
  US 20190089507A1
• Time in Patent Office: 543 Days
• Field of Search: 370329, 370330
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

Systems, apparatuses, and methods are described for wireless communications. A wireless device may receive configuration parameters for a primary cell and a secondary cell. The secondary cell may have configured scheduling request resources and the primary cell may not have configured scheduling request resources. The wireless device may initiate a random access procedure based on certain conditions in a time interval.

Claims

1. A method comprising:

receiving, by a wireless device, configuration parameters of a plurality of cells, wherein the plurality of cells comprises;

a primary cell with no configured scheduling request (SR) resources; and

a secondary cell, in a secondary timing advance group (sTAG), with configured SR resources;

receiving an activation command to activate the secondary cell; and

initiating a random access procedure based on a determination that;

an SR process is pending in a time interval;

uplink data channel resources are not available for transmission in the time interval; and

uplink transmission timing of the sTAG is out-of-sync in the time interval.

2. The method of claim 1, wherein the secondary cell is in an activated state in the time interval.

3. The method of claim 1, further comprising transmitting a random access preamble in random access resources of the primary cell.

4. The method of claim 1, wherein the plurality of cells are grouped into a plurality of physical uplink control channel (PUCCH) groups comprising:

a primary PUCCH group comprising the primary cell, wherein the primary cell is configured for a transmission of a primary PUCCH signal to a base station; and

a secondary PUCCH group comprising the secondary cell, wherein the secondary cell is configured for a transmission of a secondary PUCCH signal to the base station.

5. The method of claim 1, wherein the plurality of cells are grouped into a plurality of timing advance groups (TAGs) comprising:

a primary TAG comprising the primary cell; and

the sTAG comprising the secondary cell.

6. The method of claim 1, further comprising receiving a random access response comprising an uplink grant.

7. The method of claim 1, wherein the configuration parameters of the plurality of cells comprise a time alignment timer parameter for the sTAG.

8. The method of claim 1, wherein the configuration parameters comprise:

first configuration parameters of a primary PUCCH for the primary cell; and

second configuration parameters of a secondary PUCCH for the secondary cell.

9. The method of claim 1, further comprising initiating the SR process based on the wireless device having one or more uplink packets for transmission.

10. The method of claim 1, wherein the time interval is at least one of:

a frame, a subframe, a transmission time interval (TTI), a slot, or a symbol.

11. A wireless device comprising:

one or more processors; and

memory storing instructions that, when executed, cause the wireless device to;

receive configuration parameters of a plurality of cells, wherein the plurality of cells comprise;

a primary cell with no configured scheduling request (SR) resources; and

a secondary cell, in a secondary timing advance group (sTAG), with configured SR resources;

receive an activation command to activate the secondary cell; and

initiate a random access procedure based on a determination that;

an SR process is pending in a time interval;

uplink data channel resources are not available for transmission in the time interval; and

uplink transmission timing of the sTAG is out-of-sync in the time interval.

12. The wireless device of claim 11, wherein the secondary cell is in an activated state in the time interval.

13. The wireless device of claim 11, wherein the instructions, when executed, further cause the wireless device to transmit a random access preamble in random access resources of the primary cell.

14. The wireless device of claim 11, wherein the plurality of cells are grouped into a plurality of physical uplink control channel (PUCCH) groups comprising:

a primary PUCCH group comprising the primary cell, wherein the primary cell is configured for a transmission of a primary PUCCH signal to a base station; and

a secondary PUCCH group comprising the secondary cell, wherein the secondary cell is configured for a transmission of a secondary PUCCH signal to the base station.

15. The wireless device of claim 11, wherein the plurality of cells are grouped into a plurality of timing advance groups (TAGs) comprising:

a primary TAG comprising the primary cell; and

the sTAG comprising the secondary cell.

16. The wireless device of claim 11, wherein the instructions, when executed, further cause the wireless device to receive a random access response comprising an uplink grant.

17. The wireless device of claim 11, wherein the configuration parameters of the plurality of cells comprise a time alignment timer parameter for the sTAG.

18. The wireless device of claim 11, wherein the configuration parameters comprise:

first configuration parameters of a primary PUCCH for the primary cell; and

second configuration parameters of a secondary PUCCH for the secondary cell.

19. The wireless device of claim 11, wherein the instructions, when executed, further cause the wireless device to initiate the SR process based on the wireless device having one or more uplink packets for transmission.

20. The wireless device of claim 11, wherein the time interval is at least one of:

a frame, a subframe, a transmission time interval (TTI), a slot, or a symbol.

21. A system comprising:

a base station comprising;

one or more processors; and

memory storing instructions that, when executed by the one or more processors of the base station, cause the base station to;

transmit configuration parameters of a plurality of cells, wherein the plurality of cells comprise;

a primary cell with no configured scheduling request (SR) resources; and

a secondary cell, in a secondary timing advance group (sTAG), with configured SR resources; and

transmit an activation command to activate the secondary cell; and

a wireless device comprising;

one or more processors; and

memory storing instructions that, when executed by the one or more processors of the wireless device, cause the wireless device to;

initiate a random access procedure based on a determination that;

an SR process is pending in a time interval;

uplink data channel resources are not available for transmission in the time interval; and

uplink transmission timing of the sTAG is out-of-sync in the time interval.

22. The system of claim 21, wherein the secondary cell is in an activated state in the time interval.

23. The system of claim 21, wherein the instructions stored in the memory of the wireless device, when executed by the one or more processors of the wireless device, further cause the wireless device to transmit a random access preamble in random access resources of the primary cell.

24. The system of claim 21, wherein the plurality of cells are grouped into a plurality of physical uplink control channel (PUCCH) groups comprising:

a primary PUCCH group comprising the primary cell, wherein the primary cell is configured for a transmission of a primary PUCCH signal to the base station; and

a secondary PUCCH group comprising the secondary cell, wherein the secondary cell is configured for a transmission of a secondary PUCCH signal to the base station.

25. The system of claim 21, wherein the plurality of cells are grouped into a plurality of timing advance groups (TAGs) comprising:

a primary TAG comprising the primary cell; and

the sTAG comprising the secondary cell.

26. The system of claim 21, wherein the instructions stored in the memory of the base station, when executed by the one or more processors of the base station, further cause the base station to transmit a random access response comprising an uplink grant.

27. The system of claim 21, wherein the configuration parameters of the plurality of cells comprise a time alignment timer parameter for the sTAG.

28. The system of claim 21, wherein the configuration parameters comprise:

first configuration parameters of a primary PUCCH for the primary cell; and

second configuration parameters of a secondary PUCCH for the secondary cell.

29. The system of claim 21, wherein the instructions stored in the memory of the wireless device, when executed by the one or more processors of the wireless device, further cause the wireless device to initiate the SR process based on the wireless device having one or more uplink packets for transmission.

30. The system of claim 21, wherein the time interval is at least one of:

a frame, a subframe, a transmission time interval (TTI), a slot, or a symbol.

31. A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:

receive configuration parameters of a plurality of cells, wherein the plurality of cells comprise;

a primary cell with no configured scheduling request (SR) resources; and

a secondary cell, in a secondary timing advance group (sTAG), with configured SR resources;

receive an activation command to activate the secondary cell; and

initiate a random access procedure based on a determination that;

an SR process is pending in a time interval;

uplink data channel resources are not available for transmission in the time interval; and

uplink transmission timing of the sTAG is out-of-sync in the time interval.

32. The non-transitory computer-readable medium of claim 31, wherein the secondary cell is in an activated state in the time interval.

33. The non-transitory computer-readable medium of claim 31, wherein the instructions, when executed, further configure the wireless device to transmit a random access preamble in random access resources of the primary cell.

34. The non-transitory computer-readable medium of claim 31, wherein the plurality of cells are grouped into a plurality of physical uplink control channel (PUCCH) groups comprising:

a primary PUCCH group comprising the primary cell, wherein the primary cell is configured for a transmission of a primary PUCCH signal to a base station; and

a secondary PUCCH group comprising the secondary cell, wherein the secondary cell is configured for a transmission of a secondary PUCCH signal to the base station.

35. The non-transitory computer-readable medium of claim 31, wherein the plurality of cells are grouped into a plurality of timing advance groups (TAGs) comprising:

a primary TAG comprising the primary cell; and

the sTAG comprising the secondary cell.

36. The non-transitory computer-readable medium of claim 31, wherein the instructions, when executed, further configure the wireless device to receive a random access response comprising an uplink grant.

37. The non-transitory computer-readable medium of claim 31, wherein the configuration parameters of the plurality of cells comprise a time alignment timer parameter for the sTAG.

38. The non-transitory computer-readable medium of claim 31, wherein the configuration parameters comprise:

first configuration parameters of a primary PUCCH for the primary cell; and

second configuration parameters of a secondary PUCCH for the secondary cell.

39. The non-transitory computer-readable medium of claim 31, wherein the instructions, when executed, further configure the wireless device to initiate the SR process based on the wireless device having one or more uplink packets for transmission.

40. The non-transitory computer-readable medium of claim 31, wherein the time interval is at least one of:

a frame, a subframe, a transmission time interval (TTI), a slot, or a symbol.