On-demand system information

Patent metadata

Field	Value
Publication number	US-10200920-B2
Application number	US-201514803793-A
Country	US
Kind code	B2
Filing date	Jul 20, 2015
Priority date	Feb 10, 2015
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

A wireless network may provide system information by either a fixed periodic broadcast or broad-beam transmission or in response to a request by a user equipment (UE). The wireless network may broadcast (or broad-beam transmit) a signal that indicates to the UEs within a cell or zone coverage area that system information is to be transmitted on a fixed periodic schedule or in response to a request sent by one or more UEs.

First claim

What is claimed is:

1. A method for wireless communication at a user equipment (UE), comprising:
receiving, at the UE, a first signal, the first signal comprising a system information block including a first indication of whether system information is to be requested by the UE and a second indication of at least one of a channel, a frequency, or timing information for sending, by the UE, a request for the system information;
identifying one or more functions for which system information is to be obtained;
sending, by the UE, the request for system information in accordance with the first indication;
receiving, at the UE, the system information in accordance with the first indication and the request, wherein the received system information includes system information for the identified one or more functions; and
establishing a connection between the UE and a base station in accordance with the received system information.

2. The method of claim 1 , wherein receiving the system information comprises:
receiving the system information via a second signal in accordance with the first indication, the second signal being transmitted via a broadcast or broad-beam operation.

3. The method of claim 1 , wherein receiving the first signal comprises:
receiving information indicating a predetermined channel on which system information is to be transmitted via a second broadcast signal via a broadcast or broad-beam operation.

4. The method of claim 1 , wherein receiving the first signal comprises:
receiving the first signal as part of a broad-beam operation in a massive multiple-input/multiple-output (MIMO) network.

5. The method of claim 4 , wherein receiving the system information comprises:
receiving the system information as part of a broad-beam or narrow-beam operation.

6. The method of claim 1 , wherein receiving the first signal comprises:
receiving the first signal as part of a broadcast operation in a non-massive multiple-input/multiple-output (MIMO) network.

7. The method of claim 6 , wherein receiving the system information comprises:
receiving the system information as part of a broadcast or unicast operation.

8. The method of claim 1 , wherein receiving the system information comprises:
sending a request for the system information for the one or more functions; and
receiving the system information for the one or more functions in response to the request.

9. The method of claim 1 , wherein receiving the system information comprises:
sending a separate request for system information for each of the one or more functions, each request being for system information of a different function; and
receiving, individually, system information for the one or more functions in response to each request.

10. The method of claim 1 , wherein receiving the first signal further comprises:
receiving a third indication that system information for the one or more functions is to be broadcast at one or more predetermined times and on one or more predetermined channels.

11. The method of claim 1 , wherein receiving the first signal further comprises:
receiving a third indication that system information for the one or more functions is available.

12. The method of claim 11 , wherein receiving the system information comprises:
sending one or more requests for the system information for the one or more functions in accordance with the first indication and the third indication; and
receiving the system information for the one or more functions the one or more requests.

13. The method of claim 11 , wherein receiving the first signal comprises:
receiving information identifying a target device where one or more requests for system information for the one or more functions are to be sent.

14. The method of claim 11 , wherein receiving the first signal comprises:
receiving information identifying one or more time periods corresponding to when one or more requests for system information for the one or more functions are to be sent, wherein each time period corresponds to a separate function of the one or more services.

15. The method of claim 11 , wherein receiving the system information comprises:
receiving the system information for the one or more functions via one or more second signals, the one or more second signals being transmitted via a broadcast or broad-beam operation.

16. The method of claim 1 , wherein receiving the system information comprises:
receiving the system information for the one or more functions, wherein the system information includes information identifying the one or more functions for which the system information is valid.

17. The method of claim 1 , wherein receiving the system information comprises:
receiving the system information for one of the one or more functions;
determining whether additional system information for the one of the one or more functions is needed; and
requesting additional system information for the one of the one or more functions based at least in part on the determining.

18. The method of claim 1 , wherein the one or more functions include one or more of an energy efficient function, a high reliability function, a low latency function, a broadcast function, or a small data function.

19. The method of claim 1 , wherein receiving the system information comprises:
receiving the system information for the one or more functions, wherein the system information includes information identifying a validity time period; and
re-obtaining the system information for the one or more functions upon expiration of the validity time period.

20. The method of claim 19 , wherein the validity time period is based on a power saving mode (PSM) time period or an amount of time to cycle through all value tags of the system information.

21. A method for wireless communication, comprising:
transmitting, from a base station, a first signal, the first signal comprising a system information block including a first indication of whether system information is to be requested by a user equipment (UE) and a second indication of at least one of a channel, a frequency, or timing information for sending, by the UE, a request for the system information;
receiving, at the base station, the request for the system information in accordance with the indication;
transmitting, from the base station, the system information in accordance with the first indication and the request, wherein the system information associated with functions available to the UE, wherein separate transmissions are used to transmit the system information for different functions and different configurations of functions; and
establishing a connection between the base station and the UE in accordance with the system information.

22. The method of claim 21 , wherein transmitting the system information comprises:
transmitting the system information via a second signal in accordance with the indication, the second signal being transmitted via a broadcast or broad-beam operation.

23. The method of claim 21 , further comprising:
including, in the first signal, information indicating a predetermined channel on which the system information is to be transmitted via a broadcast or broad-beam operation.

24. The method of claim 21 , wherein transmitting the system information comprises:
transmitting the system information in accordance with the indication and a transmission mode.

25. The method of claim 24 , furt

Assignees

• Qualcomm Inc

Inventors

• Kubota Keiichi
• Ji Tingfang
• Bhushan Naga
• Horn Gavin Bernard
• Smee John Edward
• Soriaga Joseph Binamira
• Zeng Wei

Classifications

• H04W48/12 Primary

  using downlink control channel · CPC title

• H04L12/18

  for broadcast or conference {, e.g. multicast} · CPC title

• H04B7/0413 Primary

  MIMO systems · CPC title

• Y02D30/70

  in wireless communication networks · CPC title

• H04W36/0083 Primary

  Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists · CPC title