Scheduling request on a secondary cell of a wireless device

• US 10,200,177 B2
• Filed: 05/19/2016
• Issued: 02/05/2019
• 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:
  US15/159,629
• Publication Number:
  US 20160365959A1
• Time in Patent Office: 992 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

A plurality of cells comprise a primary cell with no configured scheduling request (SR) resources and a secondary cell with configured SR resources. A wireless device receives an activation command indicating activation of the secondary cell. The wireless device initiates a random access procedure when in a subframe: an SR process is pending; no uplink data channel resources are available for transmission; and a time alignment timer of an sTAG comprising the secondary cell is not running.

Claims

1. A method comprising:

receiving, by a wireless device, at least one message comprising configuration parameters of a plurality of cells, the plurality of cells comprising;

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

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

receiving an activation command indicating activation of the secondary cell; and

initiating a random access procedure when in a subframe;

an SR process is pending;

no uplink data channel resources are available for transmission; and

a time alignment timer of the sTAG is not running.

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

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 with a primary PUCCH transmitted to a base station; and

a secondary PUCCH group comprising the secondary cell with a secondary PUCCH transmitted 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, wherein the SR resources are configured on the secondary cell in the subframe.

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

8. The method of claim 1, wherein the at least one message comprises a time alignment timer parameter for the sTAG.

9. 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.

10. The method of claim 1, further comprising initiating the SR process when the wireless device has one or more uplink packets for transmission.

11. 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 configuration parameters of a plurality of cells, the plurality of cells comprising;

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

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

receive an activation command indicating activation of the secondary cell; and

initiate a random access procedure when in a subframe;

an SR process is pending;

no uplink data channel resources are available for transmission; and

a time alignment timer of the sTAG is not running.

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

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 with a primary PUCCH transmitted to a base station; and

a secondary PUCCH group comprising the secondary cell with a secondary PUCCH transmitted 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 SR resources are configured on the secondary cell in the subframe.

17. 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.

18. The wireless device of claim 11, wherein the at least one message comprises a time alignment timer parameter for the sTAG.

19. 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.

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