Uplink scheduling and resource allocation with fast indication

• US 8,472,397 B2
• Filed: 05/30/2012
• Issued: 06/25/2013
• Est. Priority Date: 04/27/2007
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Cai, Zhijun, Womack, James Earl, Suzuki, Takashi
• Primary Examiner(s): Gelin, Jean
• Application Number:
  US13/484,147
• Publication Number:
  US 20120236808A1
• Time in Patent Office: 391 Days
• Field of Search: 370/328, 370/329, 370/310, 370/314, 370/318, 370/319, 370/320, 370/321, 370/324, 370/335, 370/336, 370/352, 455/450, 455/451, 455/452.1
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0031 Multiple signaling transmission H04L1/1664, F15 take precedence
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1858 Transmission or retransmission of more than one copy of acknowledgement message
• CPC Class Codes: H04L 65/1083 In-session procedures
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04W 60/04 using triggered events
• CPC Class Codes: H04W 72/1263 Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Abstract

Systems and methods for signalling transitions between talk-spurt state and silence state for wireless terminals having semi-persistently allocated uplink resources are employed. A layer 1/2 indication of the state transitions may be transmitted using a resource that is specifically allocated for that purpose. Alternatively, ACK/NACK signalling may be employed. Layer 1 indications may be employed for both state transition types. Alternatively, in-band MAC layer signalling may be used to signal state transition from talk-spurt state to silence, or the network may deduce this state transition on its own. A different uplink wireless transition resource is allocated for the talk-spurt state vs. the silence state.

Claims

1. A method in a UE in a Long Term Evolution (LTE) system, comprising:

sending a Voice over IP (VOIP) packet using a Physical Uplink Shared Channel (PUSCH) resource

sending a scheduling request using a Physical Uplink Control Channel (PUCCH) resource,

wherein the PUCCH resource is specific to the UE and configured by a Radio Resource Control;

resending the Scheduling Request at least one time, using PUCCH resource;

wherein transmissions occur on the PUCCH resource only when the UE is sending a Scheduling Request on the PUCCH resource.

2. The method of claim 1, wherein the Scheduling Request is an indication that the UE has transitioned from an inactive state to an active state.

3. The method of claim 2, wherein the active state is a talk-spurt state for a voice over Internet Protocol ‘

VoIP’

session, and the inactive state is a silence state for the VoIP session.

4. The method of claim 1, wherein the Scheduling Request is indicated by the presence of a transmission on the PUCCH resource.

5. The method of claim 1, wherein the Scheduling Request includes a request for an uplink resource.

6. The method of claim 5, wherein the requested uplink resource is an Uplink Shared Channel resource.

7. A UE configured to implement the method of claim 1.

8. A UE configured to implement the method of claim 2.

9. A UE configured to implement the method of claim 3.

10. A non-transitory computer readable medium having computer executable instructions stored thereon for execution by a UE which, when executed control the execution of the method of claim 1.

11. A method in a wireless base station, the method comprising:

receiving a Voice over IP (VOIP) packet using a Physical Uplink Shared Channel (PUSCH) resource

receiving repeated Scheduling Request transmissions from a UE through a Physical Uplink Control Channel (PUCCH) resource,

wherein the PUCCH resource is specific to the UE and configured by a Radio Resource Control

wherein transmissions occur on the PUCCH resource only when the particular UE is sending a Scheduling Request on the PUCCH resource.

12. The method of claim 11 wherein the repeated Scheduling Request transmissions indicate that the particular UE has transitioned from an inactive state to an active state.

13. The method of claim 12, wherein the active state is a talk-spurt state for a voice over Internet Protocol ‘

VoIP’

session, and the inactive state is a silence state for the VoIP session.

14. The method of claim 11, wherein the Scheduling Request transmissions are indicated by the presence of transmissions on the PUCCH resource.

15. The method of claim 11, wherein the Scheduling Request includes a request for an uplink resource.

16. The method of claim 15, wherein the request for an uplink resource is a request for an uplink resource.

17. The method of claim 15, further comprising assigning an Uplink Channel to the UE.

18. A base station configured to implement the method of claim 11.

19. A base station configured to implement the method of claim 12.

20. A base station configured to implement the method of claim 13.

21. A non-transitory computer readable medium having computer executable instructions stored thereon for execution by a base station which, when executed control the execution of the method of claim 11.