Low-power LTE (LP-LTE) paging-monitoring

Patent metadata

Field	Value
Publication number	US-11032772-B2
Application number	US-202016893039-A
Country	US
Kind code	B2
Filing date	Jun 4, 2020
Priority date	Mar 14, 2016
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

A wireless communication device (UE) may include a paging subsystem that performs paging-monitoring as part of wireless communications of the wireless communication device. The UE may place wireless communication system resources not required during paging-monitoring into either a low-power state or a power-down state, and those system resources may remain in one of those respective states during paging-monitoring. The wireless communication system resources not required during the paging-monitoring may include at least a wireless communications protocol stack used during the wireless communications of the UE, and at least system resources used for performing uplink related tasks independently of wireless communication system resources used for performing downlink related tasks. The paging subsystem may include at least a control manager subsystem capable of decoding a physical downlink control channel, a downlink control subsystem capable of performing tasks related to a physical downlink data channel, and a message parser for parsing paging messages.

First claim

The invention claimed is:

1. An apparatus comprising:
a processor configured to cause a device to:
save state information representative of a present state of first system resources of the device into non-volatile memory, wherein the first system resources of the device are not used by the device during monitoring for paging performed by the device;
perform the monitoring for paging; and
write the saved state information from the non-volatile memory into a system memory of the device in response to detecting, during the monitoring for paging, a paging assigned to the device.

2. The apparatus of claim 1 , wherein the processor is configured to further cause the device to:
power down the first system resources once the state information has been saved into the non-volatile memory.

3. The apparatus of claim 1 , wherein the processor is configured to further cause the device to:
write additional information corresponding to the first system resources into the system memory of the device in response to detecting the paging assigned to the device.

4. The apparatus of claim 1 , wherein the processor is configured to further cause the device to:
process a physical control channel as part of the monitoring for paging to detect a paging grant.

5. The apparatus of claim 4 , wherein the processor is configured to further cause the device to:
process a physical data channel in response to detecting the paging grant detect a paging message corresponding to the paging grant; and
decode the paging message to detect the paging assigned to the device.

6. The apparatus of claim 5 , wherein the physical control channel includes a physical downlink control channel and the physical data channel includes a physical downlink shared channel.

7. The apparatus of claim 1 , wherein the processor is configured to further cause the device to:
perform measurements during the monitoring for paging.

8. The apparatus of claim 1 , wherein the processor is configured to further cause the device to:
place system resources used for the monitoring for paging into an off state in response to the monitoring for paging indicating that there is no paging assigned to the device.

9. A device, comprising:
radio circuitry for facilitating wireless communications of the device; and
a processor communicatively coupled to the radio circuitry and configured to cause the device to:
save state information representative of a present state of first system resources of the device into non-volatile memory, wherein the first system resources of the device are not used by the device during monitoring for paging performed by the device;
perform the monitoring for paging; and
write the saved state information from the non-volatile memory into a system memory of the device in response to detecting, during the monitoring for paging, a paging assigned to the device.

10. The device of claim 9 , wherein the processor is configured to further cause the device to:
power down the first system resources once the state information has been saved into the non-volatile memory.

11. The device of claim 9 , wherein the processor is configured to further cause the device to:
write additional information corresponding to the first system resources into the system memory of the device in response to detecting the paging assigned to the device.

12. The device of claim 9 , wherein the processor is configured to further cause the device to:
process a physical control channel as part of the monitoring for paging to detect a paging grant;
process a physical data channel in response to detecting the paging grant to detect a paging message corresponding to the paging grant; and
decode the paging message to detect the paging assigned to the device.

13. The device of claim 9 , wherein the processor is configured to further cause the device to:
perform measurements during the monitoring for paging.

14. The device of claim 9 , the processor is configured to further cause the device to:
perform an attach procedure to a wireless network subsequent to writing the saved state information into the system memory, to respond to the paging assigned to the device.

15. A non-transitory memory element storing programming instructions executable by a processor to cause a device to:
save state information representative of a present state of first system resources of the device into non-volatile memory, wherein the first system resources are not used during monitoring for paging performed by the device;
perform the monitoring for paging; and
write the saved state information from the non-volatile memory into a system memory of the device in response to detecting, during the monitoring for paging, a paging assigned to the device.

16. The non-transitory memory element of claim 15 , wherein the programming instructions are executable by the processor to further cause the device to:
power down the first system resources once the state information has been saved into the non-volatile memory.

17. The non-transitory memory element of claim 16 , wherein the programming instructions are executable by the processor to further cause the device to:
write additional information corresponding to the first system resources into the system memory of the device in response to detecting the paging assigned to the device.

18. The non-transitory memory element of claim 16 , wherein the programming instructions are executable by the processor to further cause the device to:
process a physical control channel as part of the monitoring for paging to detect a paging grant;
process a physical data channel in response to detecting the paging grant to detect a paging message corresponding to the paging grant; and
decode the paging message to detect the paging assigned to the device.

19. The non-transitory memory element of claim 15 , wherein the programming instructions are executable by the processor to further cause the device to:
perform measurements during the monitoring for paging.

20. The non-transitory memory element of claim 19 , wherein the programming instructions are executable by the processor to further cause the device to:
perform an attach procedure to a wireless network subsequent to writing the saved state information into the system memory, to respond to the paging assigned to the device.

Assignees

• Apple Inc

Inventors

• Elsayed Moustafa M
• Tabet Tarik

Classifications

• H04W52/0229 Primary

  where the received signal is a wanted signal · CPC title

• H04W68/00

  User notification, e.g. alerting and paging, for incoming communication, change of service or the like · CPC title

• H04W76/28

  Discontinuous transmission [DTX]; Discontinuous reception [DRX] · CPC title

• Y02D30/70

  in wireless communication networks · CPC title