Apparatus and methods for enhanced mobile power management

• US 9,516,597 B2
• Filed: 09/10/2013
• Issued: 12/06/2016
• Est. Priority Date: 12/04/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Tabatabaei Yazdi, Seyed Mohammadsadegh, Zhu, Xipeng, Pica, Francesco, Sambhwani, Sharad Deepak, Kapoor, Rohit
• Primary Examiner(s): Nguyen, Brian D
• Application Number:
  US14/443,039
• Publication Number:
  US 20150296459A1
• Time in Patent Office: 1,183 Days
• US Class Current: 1/1
• CPC Class Codes: H04W 52/0222 in packet switched networks
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Methods and apparatus for power management comprise detecting, at a user equipment (UE), a state transition trigger, wherein the state transition trigger indicates a current data transmission termination or an anticipated data transmission termination. Further, the methods and apparatus comprise sending a state transition indication to the network entity in response to detecting the state transition trigger. Moreover, the methods and apparatus comprise adjusting a state of the UE based at least in part on sending the state transition indication to the network entity.

Claims

1. A method of power management, comprising:

detecting, at a user equipment (UE), a state transition trigger, wherein the state transition trigger indicates a current data transmission termination or an anticipated data transmission termination;

sending a state transition indication to a network entity in response to detecting the state transition trigger, wherein the state transition indication comprises at least one additional bit in a signal connection release indication (SCRI) to indicate UE autonomous state transition without network control; and

adjusting a state of the UE based at least in part on sending the state transition indication to the network entity.

2. The method of claim 1, wherein the state transition indication further comprises:

at least two bits to indicate a desired UE target radio resource control (RRC) state.

3. The method of claim 2, wherein the state transition indication is included in an RRC message, including at least one of a signal connection release indication (SCRI) and a target state indication, on a control plane in response to the state transition trigger indicating the current data transmission termination.

4. The method of claim 3, wherein the current data transmission termination comprises at least one of an expiration of an inactivity timer or a determination of a last packet transmitted to the network entity.

5. The method of claim 3, wherein the target state indication specifies a UE target state, and wherein the UE target state includes at least one of an Idle, a Forward Access Channel (CELL_FACH), Cell Paging Channel (CELL_PCH), or a Universal Terrestrial Radio Access Network (UTRAN) Registration Area (CELL_URA).

6. The method of claim 2, wherein the state transition indication is included in at least one of a media access control (MAC) message or a radio link control (RLC) message, including at least one of signaling connection release indication (SCRI) or a target state indication embedded in a last packet on a user plane in response to the state transition trigger indicating the anticipated data transmission termination.

7. The method of claim 6, wherein the anticipated data termination comprises at least one of an expiration of an inactivity timer or a determination of a last packet of data to be transmitted to the network entity.

8. The method of claim 6, wherein the target state indication specifies a UE target state, and wherein the UE target state includes at least one of an Idle, a Forward Access Channel (CELL_FACH), Cell Paging Channel (CELL_PCH),or a Universal Terrestrial Radio Access Network (UTRAN) Registration Area (CELL_URA).

9. The method of claim 1, wherein adjusting the state of the UE comprises entering a low power state.

10. The method of claim 9, wherein entering the low power state comprises entering before or after receiving a data reception acknowledgement message (ACK) from the network entity.

11. The method of claim 9, wherein entering the low power state without receiving a network originated low power initiation message.

12. The method of claim 1, further comprising:

releasing a network connection after sending the state transition indication to the network entity.

13. A non-transitory computer readable medium storing computer executable code for power management, comprising code to:

detect, at a user equipment (UE), a state transition trigger, wherein the state transition trigger indicates a current data transmission termination or an anticipated data transmission termination;

send a state transition indication to a network entity in response to detecting the state transition trigger, wherein the state transition indication comprises at least one additional bit in a signal connection release indication (SCRI) to indicate UE autonomous state transition without network control; and

adjust a state of the UE based at least in part on sending the state transition indication to the network entity.

14. An apparatus for power management, comprising:

means for detecting, at a user equipment (UE), a state transition trigger, wherein the state transition trigger indicates a current data transmission termination or an anticipated data transmission termination;

means for sending a state transition indication to a network entity in response to detecting the state transition trigger, wherein the state transition indication comprises at least one additional bit in a signal connection release indication (SCRI) to indicate UE autonomous state transition without network control; and

means for adjusting a state of the UE based at least in part on sending the state transition indication to the network entity.

15. An apparatus for power management, comprising:

a memory; and

at least one processor coupled to the memory and configured to;

detect, at a user equipment (UE), a state transition trigger, wherein the state transition trigger indicates a current data transmission termination or an anticipated data transmission termination;

send a state transition indication to a network entity in response to detecting the state transition trigger, wherein the state transition indication comprises at least one additional bit in a signal connection release indication (SCRI) to indicate UE autonomous state transition without network control; and

adjust a state of the UE based at least in part on sending the state transition indication to the network entity.

16. The apparatus of claim 15, wherein the state transition indication further comprises:

at least two bits to indicate a desired UE target radio resource control (RRC) state.

17. The apparatus of claim 15, wherein the state transition indication is included in an RRC message, including at least one of a signal connection release indication (SCRI) and a target state indication, on a control plane in response to the state transition trigger indicating the current data transmission termination.

18. The apparatus of claim 17, wherein the current data transmission termination comprises at least one of an expiration of an inactivity timer or a determination of a last packet transmitted to the network entity.

19. The apparatus of claim 17, wherein the target state indication specifies a UE target state, and wherein the UE target state includes at least one of an Idle, a Forward Access Channel (CELL_FACH), Cell Paging Channel (CELL_PCH), or a Universal Terrestrial Radio Access Network (UTRAN) Registration Area (CELL_URA).

20. The apparatus of claim 15, wherein adjusting the state of the UE comprises entering a low power state.