Incremental transmission of system information

• US 9,769,733 B2
• Filed: 07/20/2015
• Issued: 09/19/2017
• 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): Thier, Michael
• Assistant Examiner(s): COX, BRIAN P
• Application Number:
  US14/804,095
• Publication Number:
  US 20160234759A1
• Time in Patent Office: 792 Days
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 48/14 using user query or user detection

Abstract

Methods, systems, and devices are described for wireless communication. A first method includes receiving, at a user equipment (UE), a first set of system information; determining, based at least in part on the first set of system information, that additional system information is available; transmitting a request for the additional system information; and receiving the additional system information at the UE. A second method includes transmitting, from a base station, a first set of system information; receiving a request for additional system information; and transmitting the additional system information based at least in part on the request.

Claims

1. A method for wireless communication, comprising:

decoding, at a user equipment (UE), information from a downlink channel indicating that master system information is received via request;

transmitting a master system information request based on the decoded information;

receiving, at the UE, a first set of system information including the master system information in response to the master system information request, wherein the master system information includes system information that allows the UE to perform an initial access of a network;

determining, based at least in part on the first set of system information, that additional system information is available;

transmitting a request for the additional system information; and

receiving the additional system information at the UE.

2. The method of claim 1, wherein receiving the first set of system information comprises:

receiving an indication of one or more sets of additional system information that are available.

3. The method of claim 1, wherein transmitting the request for the additional system information comprises:

identifying, in the request for the additional system information, one or more sets of additional system information.

4. The method of claim 1, wherein the master system information includes system information that allows the UE to perform the initial access of the network using 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.

5. The method of claim 1, wherein receiving the additional system information comprises one of:

receiving system information indicating which radio access technologies (RATs) are available in a region and how the UE is to select an available RAT;

receiving system information indicating which services are available in a region and how the UE is to obtain an available service;

receiving system information relating to a multimedia broadcast multicast service (MBMS) or a public warning system (PWS) service;

or

receiving system information relating to location, positioning, or navigation services.

6. The method of claim 1, wherein the downlink channel includes a synchronization signal.

7. The method of claim 1, wherein transmitting the request for the additional system information comprises:

including one or more capabilities of the UE in the request for the additional system information.

8. The method of claim 7, wherein receiving the additional system information comprises:

receiving the additional system information based at least in part on the one or more capabilities of the UE included in the request for the additional system information.

9. The method of claim 1, wherein transmitting the request comprises:

including a location of the UE in the request for the additional system information.

10. The method of claim 9, wherein receiving the additional system information comprises:

receiving the additional system information based at least in part on the location of the UE included in the request for the additional system information.

11. The method of claim 1, wherein receiving the additional system information comprises:

receiving the additional system information based at least in part on a determined location of the UE.

12. The method of claim 1, further comprising:

receiving, at the UE, a location signal identifying a determined location of the UE; and

transmitting the request for the additional system information based at least in part on the determined location of the UE.

13. The method of claim 1, wherein determining that additional system information is available comprises:

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

determining that the identified distance exceeds a predetermined threshold.

14. The method of claim 1, wherein transmitting the request for the additional system information comprises:

including an identification of the UE in the request.

15. The method of claim 14, wherein receiving the additional system information comprises:

receiving the additional system information based at least in part on the identification of the UE included in the request for the additional system information.

16. The method of claim 1, wherein transmitting the request for the additional system information comprises:

transmitting a plurality of requests for the additional system information.

17. 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;

decode, at a user equipment (UE), information from a downlink channel indicating that master system information is received via request;

transmit a master system information request based on the decoded information;

receiving, at the UE, a first set of system information including the master system information in response to the master system information request, wherein the master system information includes system information that allows the UE to perform an initial access of a network;

determine, based at least in part on the first set of system information, that additional system information is available;

transmit a request for the additional system information; and

receive the additional system information at the UE.

18. The apparatus of claim 17, wherein the instructions executable by the processor to receive the first set of system information comprise instructions executable by the processor to:

receive an indication of one or more sets of additional system information that are available.

19. The apparatus of claim 17, wherein the instructions executable by the processor to transmit the request for the additional system information comprise instructions executable by the processor to:

identify, in the request for the additional system information, one or more sets of additional system information.

20. A method for wireless communication, comprising:

transmitting, from a base station, information over a downlink channel indicating that master system information will be transmitted via request;

receiving, from a user equipment (UE), a master system information request responsive to the information transmitted over the downlink channel;

transmitting, from the base station, a first set of system information including master system information, wherein the master system information includes system information that allows the UE to perform an initial access of a network based at least in part on the received master system information request;

receiving a request for additional system information; and

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

21. The method of claim 20, wherein transmitting the first set of system information comprises:

transmitting an indication of one or more sets of additional system information that are available.

22. The method of claim 20, wherein receiving the request for the additional system information comprises one of:

receiving multiple requests for additional system information corresponding to multiple sets of additional system information to be transmitted;

receiving, in the request, one or more capabilities of the UE transmitting the request;

receiving, in the request, a location of the UE transmitting the request;

or

receiving, in the request, an identification of the UE transmitting the request.

23. The method of claim 22, further comprising:

identifying the additional system information to transmit based at least in part on the one or more capabilities of the UE included in the request for the additional system information.

24. The method of claim 22, further comprising:

identifying the additional system information to transmit based at least in part on the location of the UE included in the request for the additional system information.

25. The method of claim 20, wherein the master system information includes system information that allows a user equipment (UE) an initial access of a network using 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.

26. The method of claim 20, wherein transmitting the additional system information comprises one of:

transmitting system information indicating which radio access technologies (RATs) are available in a region and how the UE is to select an available RAT;

transmitting system information indicating which services are available in a region and how the UE is to obtain an available service;

or

transmitting system information relating to location, positioning, or navigation services.

27. The method of claim 20, further comprising:

determining a location of the UE transmitting the request for the additional system information; and

identifying the additional system information to transmit based at least in part on the location of the UE.

28. 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, from a base station, information over a downlink channel Indicating that master system information will be transmitted via request;

receive, from a user equipment (UE), a master system information request responsive to the information transmitted over the downlink channel;

transmit, from the base station, a first set of system information including master system information, wherein the master system information includes system information that allows the UE to perform an initial access of a network based at least in part on the received master system information request;

receive a request for additional system information; and

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