Flexible paging and on-demand page indicator

Patent metadata

Field	Value
Publication number	US-10051601-B2
Application number	US-201514836435-A
Country	US
Kind code	B2
Filing date	Aug 26, 2015
Priority date	Mar 15, 2015
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

Certain aspects of the present disclosure generally relate to techniques for on-demand paging. In one aspect, a method is provided for receiving a paging message by a mobile device. The method generally includes acquiring network time, determining, based on the network time or an internal timer, that the mobile device is within a paging window wherein the mobile device can receive a paging message, and sending an indication message, in response to the determination. The mobile device may receive a response to the indication message, the response indicating whether or not there is a paging message for the mobile device.

First claim

What is claimed is:

1. A method for receiving a paging message by a mobile device, comprising:
determining a paging window that includes a paging occasion (PO) of a paging cycle and a duration that is at least one of: before or after the PO;
acquiring symbol-level network timing information for synchronization to a network;
determining, based on the symbol-level network timing information, that the mobile device is within the paging window; and
performing an on-demand paging procedure in the paging window, wherein performing the on-demand paging procedure comprises:
sending a message that indicates the mobile device is able to receive a paging indicator message or that requests a paging indicator message for the mobile device, wherein the paging indicator message indicates whether there is a paging message for the mobile device; and
receiving the paging indicator message in response to the message.

2. The method of claim 1 , wherein the paging indicator message is received via a physical downlink control channel (PDCCH) or physical downlink shared channel (PDSCH).

3. The method of claim 1 , further comprising:
exiting a deep sleep-state to acquire the network timing information; and
returning to the deep sleep state if the paging indicator message indicates that there is no paging message for the mobile device.

4. The method of claim 3 , wherein the exiting is in preparation for performing one or more tasks at the mobile device.

5. The method of claim 4 , wherein:
performing the one or more tasks comprises sending mobile originated (MO) data or control information; and
the message is transmitted with the MO data or control information.

6. The method of claim 1 , further comprising:
performing a connection procedure with the network to receive the paging message if the paging indicator message indicates there is a paging message for the mobile device.

7. The method of claim 6 , further comprising:
receiving, with the paging indicator message, at least one of scheduling information for data associated with the paging message or data associated with the paging message.

8. The method of claim 1 , wherein the message is sent with at least one of data or control information originating from the mobile device.

9. The method of claim 1 , further comprising:
providing capability information, wherein the capability information indicates whether paging indicator messages are to be sent in response to the message.

10. The method of claim 9 , wherein the capability information is provided in a capabilities message.

11. The method of claim 9 , wherein the capability information is provided in a registration message.

12. The method of claim 9 , further comprising:
providing, with the capability information, an indication of a tolerable latency for the paging messages to be buffered for the mobile device.

13. The method of claim 1 , further comprising:
receiving an indication from the network that paging indicator messages will be sent in response to the message.

14. The method of claim 1 , wherein at least one of a periodicity or length of the paging window is dependent on a tolerable latency during which the paging message for the mobile device is held in a buffer at the network.

15. The method of claim 14 , wherein the mobile device is configured to maintain a timer to ensure the message is sent within the tolerable latency.

16. The method of claim 1 , wherein the mobile device is configured to determine a next paging window based on a current paging window.

17. The method of claim 1 , wherein determining that the mobile device is within the paging window comprises determining that a threshold amount of time has passed since transmitting a last message.

18. The method of claim 1 , wherein determining that the mobile device is within the paging window comprises:
defining the paging window based on a worst case timing drift associated with a synchronization level of the mobile device and a time of the PO; and
checking an internal timer to determine whether the mobile device is within the defined paging window.

19. The method of claim 1 , further comprising:
determining a time of occurrence of one of the POs after determining the paging cycle;
entering a deep sleep state; and
exiting the deep sleep state after a duration targeting the determined time of occurrence of the PO to acquire the symbol-level network timing information.

20. A method for paging a mobile device by a base station (BS), comprising:
within a paging window during which an on-demand paging procedure is performed, receiving a message from the mobile device that indicates the mobile device is able to receive a paging indicator message or that requests a paging indicator message for the mobile device, wherein the paging window includes a paging occasion (PO) of a paging cycle and a duration that is at least one of: before or after the PO; and
in response to the message, providing a paging indicator message to the mobile device within the paging window, wherein the paging indicator message indicates whether there is a paging message for the mobile device.

21. The method of claim 20 , wherein the message is received with data originating from the mobile device.

22. The method of claim 20 , further comprising:
receiving a paging message from a network node for the mobile device; and
buffering the paging message for a threshold duration or until the message is received from the mobile device.

23. The method of claim 22 , wherein the threshold duration is indicated in the paging message.

24. The method of claim 22 , wherein the threshold duration is configured by an operation, administrative, and maintenance (OAM) function.

25. The method of claim 22 , wherein the threshold duration is indicated in capability information.

26. The method of claim 20 , further comprising:
determining the mobile device is to receive paging messages in response to the message.

27. The method of claim 26 , wherein the determination is based on an indication in the paging message.

28. The method of claim 26 ,
wherein the determination is made based on an indication in capability information received from the mobile device.

29. The method of claim 28 , wherein the capability information is received in a capabilities message.

30. The method of claim 28 , wherein the capability information is received in a registration message.

31. The method of claim 20 , further comprising:
sending an indication to the mobile device that paging indicator messages will be sent on-demand in response to the message.

32. The method of claim 20 , wherein the paging indicator message is sent after a fixed delay relative to a time when the message is received.

33. A method by a network node, comprising:
sending a paging message to a base station to be delivered to a mobile device within a paging window, wherein the paging window includes a paging occasion (PO) of a paging cycle and a duration that is at least one of: before or after the PO; and
providing an indication to the base station that an on-demand paging procedure is to be performed for delivering the paging message to the mobile device, wherein performing the on-demand paging procedure comprises:
delivering a paging indicator message to the mobile

Assignees

• Qualcomm Inc

Inventors

• Ang Peter Pui Lok
• Zeng Wei
• Ji Tingfang
• Horn Gavin Bernard
• Soriaga Joseph Binamira
• Bhushan Naga
• Smee John Edward

Classifications

• H04W68/00 Primary

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

• H04W76/27

  Transitions between radio resource control [RRC] states · CPC title

• H04W68/02 Primary

  Arrangements for increasing efficiency of notification or paging channel · CPC title