METHOD AND RELATED DEVICE OF SCHEDULING REQUEST BEHAVIOR IN A WIRELESS COMMUNICATION SYSTEM

• US 20100074231A1
• Filed: 08/10/2009
• Published: 03/25/2010
• Est. Priority Date: 09/22/2008
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: HTC Corporation
• Inventors: Hsu, Chia-Chun
• Granted Patent: US 8,649,320 B2
• Time in Patent Office: Days
• US Class Current: 370/336
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support

Abstract

A method of scheduling request (SR) behavior for a UE configured with semi-persistent scheduling in a wireless communication system includes triggering an SR when the UE does not have an uplink resource allocated for a current transmission time interval, and controlling the triggered SR to remain pending and to be repeated until uplink resources are granted for a new transmission.

Claims

1. A method of scheduling request, abbreviated to SR, behavior of a user equipment, abbreviated to UE, in a wireless communication system, the method comprising:

triggering an SR when the UE does not have any uplink resource allocated for a current transmission time interval; and

when semi-persistent scheduling is configured, controlling the triggered SR to remain pending and to be repeated until uplink resources are granted for a new transmission.

2. The method of claim 1, wherein the uplink resources for the new transmission are granted by a dynamic scheduling cell radio network temporary identifier.

3. The method of claim 1, wherein the uplink resources for the new transmission are granted by a semi-persistent scheduling cell radio network temporary identifier.

4. The method of claim 1, wherein the uplink resources for the new transmission are configured by a radio resource control layer of the UE due to semi-persistent scheduling.

5. A communication device of a wireless communication system for scheduling request, abbreviated to SR, behavior, the communication device comprising:

a computer readable recording medium for storing program code corresponding to a process;

a processor coupled to the computer readable recording medium for processing the program code to execute the process, wherein the process comprises;

triggering an SR when the communication device does not have any uplink resource allocated for a current transmission time interval; and

controlling the triggered SR to remain pending and to be repeated until uplink resources are granted for a new transmission.

6. The communication device of claim 5, wherein the uplink resources for the new transmission are granted by a dynamic scheduling cell radio network temporary identifier or a semi-persistent scheduling cell radio network temporary identifier.

7. The communication device of claim 5, wherein the uplink resources for the new transmission are configured by a radio resource control layer of the communication device due to semi-persistent scheduling.

8. A communication device of a wireless communication system for scheduling request, abbreviated to SR, behavior, the communication device comprising:

a trigger unit for triggering an SR when the communication device does not have any uplink resource allocated for a current transmission time interval; and

an SR control unit coupled to the trigger unit, for controlling the triggered SR to remain pending and to be repeated until uplink resources are granted for a new transmission when semi-persistent scheduling is configured.

9. The communication device of claim 8, wherein the uplink resources for the new transmission are granted by a dynamic scheduling cell radio network temporary identifier.

10. The communication device of claim 8, wherein the uplink resources for the new transmission are granted by a semi-persistent scheduling cell radio network temporary identifier.

11. The communication device of claim 8, wherein the uplink resources for the new transmission are configured by a radio resource control layer of the communication device due to semi-persistent scheduling.

12. A method of scheduling request, abbreviated to SR, behavior for a user equipment, abbreviated to UE, in a wireless communication system, the method comprising:

monitoring a transmission buffer; and

stopping sending an SR when the transmission buffer is emptied.

13. The method of claim 12, wherein the step of stopping sending the SR when the transmission buffer is emptied comprises:

when a physical uplink control channel is configured with the UE, deactivating a pending SR.

14. The method of claim 12, wherein the step of stopping sending the SR when the transmission buffer is emptied comprises:

when no physical uplink control channel is configured with the UE, stopping transmitting a Random Access Preamble.

15. A communication device of a wireless communication system for scheduling request, abbreviated to SR, behavior, the communication device comprising:

a computer readable recording medium for storing program code corresponding to a process;

a processor coupled to the computer readable recording medium for processing the program code to execute the process, wherein the process comprises;

monitoring a transmission buffer; and

stopping sending an SR when the transmission buffer is emptied.

16. The communication device of claim 15, wherein the step of stopping sending the SR when the transmission buffer is emptied comprises:

when a physical uplink control channel is configured with the communication device, deactivating a pending SR.

17. The communication device of claim 15, wherein the step of stopping sending the SR when the transmission buffer is emptied comprises:

when no physical uplink control channel is configured with the communication device, stopping transmitting a Random Access Preamble.

18. A communication device of a wireless communication system for scheduling request, abbreviated to SR, behavior, the communication device comprising:

a monitoring unit for monitoring a transmission buffer; and

an SR control unit coupled to the monitoring unit, for stopping sending an SR when the monitoring unit observes that the transmission buffer is emptied.

19. The communication device of claim 18, wherein the SR control unit deactivates a pending SR when a physical uplink control channel is configured with the communication device.

20. The communication device of claim 18, wherein the SR control unit stops transmitting a Random Access Preamble when no physical uplink control channel is configured with the communication device.