System information updating

• US 10,616,822 B2
• Filed: 07/20/2015
• Issued: 04/07/2020
• Est. Priority Date: 02/10/2015
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Kubota, Keiichi, Horn, Gavin Bernard
• Primary Examiner(s): Ho, Huy C
• Application Number:
  US14/804,140
• Publication Number:
  US 20160234735A1
• Time in Patent Office: 1,723 Days
• Field of Search: 455436, 455515
• CPC Class Codes: H04W 48/14 using user query or user detection

Abstract

A first method includes receiving a first signal at a user equipment (UE), where the UE communicates with a network using first system information, the first signal including an indication of whether system information is to be requested by the UE; determining, based at least in part on the first signal, to request updated system information; and requesting updated system information based at least in part on the determining. A second method includes transmitting a first signal from a base station to a UE, where the UE communicates with a network using first system information, the first signal including an indication of whether system information is to be requested by the UE and information to allow the UE to determine to request updated system information; receiving a request from the UE for updated system information; and transmitting the updated system information based at least in part on the request.

Claims

1. A method for wireless communication, comprising:

receiving a first signal at a user equipment (UE), the UE communicating with a network using first system information, the first signal comprising at least a paging message indicating that system information has changed;

receiving a second signal at the UE after receiving the paging message, the second signal identifying which portion of system information has changed;

determining, based at least in part on the identified portion of system information, whether to request updated system information; and

requesting the updated system information based at least in part on the determining.

2. The method of claim 1, wherein determining whether to request updated system information comprises one of:

identifying that the UE has moved into a zone using second system information that is different from the first system information;

identifying that the network has changed at least a portion of the first system information;

identifying that the UE has moved more than a predetermined distance from a location where the UE obtained the first system information;

or

identifying a distance between a current location of the UE and a location where the UE obtained the first system information; and

determining that the identified distance exceeds a predetermined threshold.

3. The method of claim 2, further comprising:

obtaining the predetermined threshold from the network.

4. The method of claim 1, wherein receiving the first signal further comprises:

receiving a zone identifier.

5. The method of claim 4, wherein receiving the zone identifier comprises one of:

receiving an area code, a base station identity code (BSIC), or other cell identifier;

or

receiving the zone identifier as part of a synchronization signal.

6. The method of claim 4, further comprising:

using the zone identifier to identify that the UE has moved from a first zone to a second zone.

7. The method of claim 1, wherein receiving the second signal comprises:

receiving a modification flag that indicates by a binary value that a corresponding portion of system information has changed.

8. The method of claim 1, wherein receiving the first signal comprises:

receiving a value tag associated with master system information that includes one or more of an identification of the network, an identification of a base station in the network, cell selection configuration and access restrictions, or network access configuration information.

9. The method of claim 8, wherein determining whether to request updated system information comprises:

comparing the received value tag associated with master system information with a previously received master system information value tag; and

determining whether to request the updated system information based at least in part on the comparison.

10. The method of claim 1, wherein receiving the second signal comprises:

receiving a value tag corresponding to a specific portion of system information that has changed.

11. The method of claim 10, wherein the value tag corresponds to a portion of master system information, a portion of additional non-master system information, or a combination thereof, wherein the master system information includes one or more of an identification of the network, an identification of a base station in the network, cell selection configuration and access restrictions, or network access configuration information.

12. The method of claim 1, wherein receiving the first signal further comprises:

receiving a location signal identifying a location of the UE.

13. The method of claim 1, wherein requesting updated system information comprises:

requesting only the identified portion of system information.

14. The method of claim 1, wherein:

determining whether to request updated system information comprises determining whether the portion of system information is relevant to the UE; and

requesting the updated system information comprises requesting only the identified portion of system information determined to be relevant to the UE.

15. An apparatus for wireless communication, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory, the instructions being executable by the processor to;

receive a first signal at a user equipment (UE), the UE communicating with a network using first system information, the first signal comprising at least a paging message indicating that system information has changed;

receive a second signal at the UE after receiving the paging message, the second signal identifying which portion of system information has changed;

determine, based at least in part on the identified portion of system information, whether to request updated system information; and

request the updated system information based at least in part on the determining.

16. The apparatus of claim 15, wherein the instructions executable by the processor to determine whether to request updated system information comprise instructions executable by the processor to:

identify that the UE has moved into a zone using second system information that is different from the first system information;

identify that the network has changed at least a portion of the first system information;

identify that the UE has moved more than a predetermined distance from a location where the UE obtained the first system information;

or

identify a distance between a current location of the UE and a location where the UE obtained the first system information; and

determine that the identified distance exceeds a predetermined threshold.

17. The apparatus of claim 16, wherein the instructions executable by the processor to receive the second signal comprise instructions executable by the processor to:

receive a modification flag that indicates by a binary value that a corresponding portion of system information has changed.

18. A method for wireless communication, comprising:

transmitting a first signal from a base station to a user equipment (UE), the UE communicating with a network using first system information, the first signal comprising at least a paging message indicating that system information has changed;

transmitting a second signal to the UE after transmitting the paging message, the second signal identifying which portion of system information has changed;

receiving a request from the UE for updated system information in response to the second signal; and

transmitting the updated system information based at least in part on the request.

19. The method of claim 18, wherein transmitting the first signal comprises one of:

transmitting a zone identifier;

transmitting an indication that at least a portion of the first system information has changed;

or

transmitting a value tag corresponding to a specific portion of the first system information that has changed.

20. The method of claim 19, wherein transmitting the zone identifier comprises one of:

transmitting an area code, a base station identity code (BSIC), or other cell identifier;

or

transmitting the zone identifier as part of a synchronization signal.

21. The method of claim 18, wherein transmitting the second signal comprises:

transmitting a modification flag that indicates by a binary value that a corresponding portion of system information has changed.

22. The method of claim 18, wherein transmitting the first signal comprises:

transmitting a value tag associated with master system information that includes one or more of an identification of the network, an identification of the base station, cell selection configuration and access restrictions, or network access configuration.

23. The method of claim 18, wherein transmitting the second signal comprises:

transmitting a value tag corresponding to a specific portion of system information that has changed.

24. The method of claim 23, wherein the value tag corresponds to a portion of master system information, a portion of additional non-master system information, or a combination thereof, wherein the master system information includes one or more of an identification of the network, an identification of the base station, cell selection configuration and access restrictions, or network access configuration.

25. An apparatus for wireless communication, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory, the instructions being executable by the processor to;

transmit a first signal from a base station to a user equipment (UE), the UE communicating with a network using first system information, the first signal comprising at least a paging message indicating that system information has changed;

transmit a second signal to the UE after transmitting the paging message, the second signal identifying which portion of system information has changed;

receive a request from the UE for updated system information in response to the second signal; and

transmit the updated system information based at least in part on the request.

26. The apparatus of claim 25, wherein the instructions executable by the processor to transmit the first signal comprise instructions executable by the processor to:

transmit a zone identifier;

transmit an indication that at least a portion of the first system information has changed;

or

transmit one or more value tags corresponding to different portions of the first system information that have changed.

27. The apparatus of claim 26, wherein the instructions executable by the processor to transmit the zone identifier comprise instructions executable by the processor to:

transmit the zone identifier as part of a synchronization signal.