Scheduling Request Resource Selection

• US 20160270114A1
• Filed: 03/03/2016
• Published: 09/15/2016
• Est. Priority Date: 03/09/2015
• Status: Active Grant

• Current Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Original Assignee: Ofinno Technologies, LLC
• Inventors: Dinan, Esmael Hejazi
• Granted Patent: US 10,165,592 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/52 based on load

Abstract

A plurality of cells comprise a primary cell with a primary physical uplink control channel (PUCCH) and a PUCCH secondary cell with a secondary PUCCH. The wireless device transmits a scheduling request on one valid PUCCH resource for a scheduling request resource in a subframe. The wireless device selects one of the primary PUCCH and the secondary PUCCH as the one valid PUCCH resource for transmitting the scheduling request in the subframe when the wireless device has more than the one valid PUCCH resource for the scheduling request in the subframe.

Claims

1. A method comprising:

receiving at least one message comprising configuration parameters of a plurality of cells comprising;

a primary cell with a primary physical uplink control channel (PUCCH) transmitted to a base station; and

a PUCCH secondary cell with a secondary PUCCH transmitted to the base station;

instructing a physical layer, by a media access control (MAC) entity, to transmit a scheduling request signal on one valid PUCCH resource for a scheduling request in a subframe, wherein the MAC entity selects one of the primary PUCCH and the secondary PUCCH as the one valid PUCCH resource for the scheduling request to transmit the scheduling request signal in the subframe when the MAC entity has more than the one valid PUCCH resource for the scheduling request in the subframe; and

transmitting, by the physical layer, the scheduling request signal on the one valid PUCCH resource.

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

a) a primary PUCCH group comprising the primary cell; and

b) a secondary PUCCH group comprising the PUCCH secondary cell.

3. The method of claim 1, wherein a PUCCH resource for the scheduling request is valid when the scheduling request signal can be transmitted on the PUCCH resource.

4. The method of claim 1, wherein the MAC entity selects the one valid PUCCH resource according to an implementation rule.

5. The method of claim 1, wherein a PUCCH resource for the scheduling request on the PUCCH secondary cell is invalid when the PUCCH secondary cell is deactivated.

6. The method of claim 1, wherein the MAC entity selects the primary PUCCH resource for the scheduling request when both the primary PUCCH and the secondary PUCCH have valid PUCCH resources.

7. The method of claim 1, wherein the MAC entity selects the one valid PUCCH resource employing at least one of the following rules:

the MAC entity prioritizes the primary PUCCH resource for the scheduling request;

the MAC entity employs PUCCH resource load information;

the MAC entity alternates between the primary PUCCH resource for the scheduling request and the secondary PUCCH resource for the scheduling request; and

the MAC entity employs a random or pseudo random process.

8. The method of claim 1, wherein a wireless device autonomously selects one of the primary PUCCH resource for the scheduling request and the secondary PUCCH resource for the scheduling request when the MAC entity has more than one valid PUCCH resource for the scheduling request in the subframe.

9. The method of claim 1, wherein the at least one message comprises a scheduling request configuration index employed to determine whether the subframe has valid resources for transmitting the scheduling request signal.

10. The method of claim 1, wherein the at least one message comprises:

a first scheduling request configuration index for scheduling request resources on the primary PUCCH; and

a second scheduling request configuration index for scheduling request resources on the secondary PUCCH.

11. The method of claim 1, further comprising determining whether the primary PUCCH or the secondary PUCCH or both have at least one valid PUCCH resource for the scheduling request configured for the subframe.

12. 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 at least one message comprising configuration parameters of a primary physical uplink control channel (PUCCH) and a secondary PUCCH;

as long as one scheduling request (SR) is pending, for each subframe in a plurality of subframes;

if no uplink shared channel resources are available for a transmission in the subframe and if a MAC entity has at least one valid PUCCH resource for scheduling request configured for the subframe and if the subframe is not part of a measurement gap and if a scheduling request timer is not running and if a scheduling request counter is less than a configured value;

increment the scheduling request counter by one and instruct a physical layer, by a media access control (MAC) entity to transmit a scheduling request on one valid PUCCH resource for a scheduling request in a subframe, wherein the MAC entity selects one of the primary PUCCH and the secondary PUCCH as the one valid PUCCH resource for transmitting the scheduling request in the subframe when the MAC entity has more than the one valid PUCCH resource for the scheduling request in the subframe.

13. The wireless device of claim 12, wherein the at least one message comprises a plurality of cells grouped into a plurality of physical uplink control channel (PUCCH) groups comprising:

a) a primary PUCCH group comprising the primary cell; and

b) a secondary PUCCH group comprising the PUCCH secondary cell.

14. The wireless device of claim 12, wherein a PUCCH resource for the scheduling request is valid when a scheduling request signal can be transmitted on the PUCCH resource.

15. The wireless device of claim 12, wherein the MAC entity selects the one valid PUCCH resource according to an implementation rule.

16. The wireless device of claim 12, wherein a PUCCH resource for the scheduling request on the PUCCH secondary cell is invalid when the PUCCH secondary cell is inactivated.

17. The wireless device of claim 12, wherein the MAC entity selects the primary PUCCH resource for scheduling request when both the primary PUCCH and the secondary PUCCH have valid PUCCH resources.

18. 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 at least one message comprising configuration parameters of a plurality of cells comprising;

a primary cell with a primary physical uplink control channel (PUCCH) transmitted to a base station; and

a PUCCH secondary cell with a secondary PUCCH transmitted to the base station;

instruct a physical layer to transmit a scheduling request on one valid PUCCH resource for a scheduling request resource in a subframe, wherein the wireless device selects one of the primary PUCCH and the secondary PUCCH as the one valid PUCCH resource for transmitting the scheduling request in the subframe when the wireless device has more than the one valid PUCCH resource for the scheduling request in the subframe; and

transmit, by the physical layer, the scheduling request on the one valid PUCCH resource.

19. The wireless device of claim 18, wherein the wireless device autonomously selects one of the primary PUCCH resource for the scheduling request and the secondary PUCCH resource for the scheduling request when the MAC entity has more than one valid PUCCH resource for the scheduling request in the subframe.

20. The wireless device of claim 18, wherein the at least one message comprises:

a first scheduling request configuration index for scheduling request resources on the primary PUCCH; and

a second scheduling request configuration index for scheduling request resources on the secondary PUCCH.