On-demand system information

Patent metadata

Field	Value
Publication number	US-2016234736-A1
Application number	US-201514803793-A
Country	US
Kind code	A1
Filing date	Jul 20, 2015
Priority date	Feb 10, 2015
Publication date	Aug 11, 2016
Grant date	—

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 a first signal, the first signal including an indication of whether system information is to be requested by the UE; and obtaining system information in accordance with the indication.

2 . The method of claim 1 , wherein obtaining system information comprises:
sending a request for system information in accordance with the indication; and receiving system information in response to the request.

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

4 . The method of claim 1 , wherein receiving the first signal comprises:
receiving information indicating where a request for system information is to be sent by the UE.

5 . 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.

6 . The method of claim 1 , wherein the first signal is a synchronization signal.

7 . 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.

8 . The method of claim 7 , wherein obtaining system information comprises:
receiving system information as part of a broad-beam or narrow-beam operation.

9 . 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.

10 . The method of claim 9 , wherein obtaining system information comprises:
receiving system information as part of a broadcast or unicast operation.

11 . The method of claim 1 , further comprising:
identifying one or more services for which system information is to be obtained; wherein obtaining the system information comprises obtaining system information for the identified one or more services in accordance with the indication.

12 . The method of claim 11 , wherein obtaining system information comprises:
sending a request for system information for the one or more services; and receiving the system information for the one or more services in response to the request.

13 . The method of claim 11 , wherein obtaining system information comprises:
sending a separate request for system information for each of the one or more services, each request being for system information of a different service; and receiving, individually, system information for the one or more services in response to each request.

14 . The method of claim 11 , wherein the indication comprises a first indication, and receiving the first signal comprises:
receiving a second indication that system information for the one or more services is to be broadcast at one or more predetermined times and on one or more predetermined channels.

15 . The method of claim 11 , wherein the indication comprises a first indication, and receiving the first signal further comprises:
receiving a second indication that system information for the one or more services is available.

16 . The method of claim 15 , wherein obtaining system information comprises:
sending one or more requests for system information for the one or more services in accordance with the first indication and the second indication; and receiving system information for the one or more services in response to the one or more requests.

17 . The method of claim 15 , 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 services are to be sent.

18 . The method of claim 15 , 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 services are to be sent, wherein each time period corresponds to a separate service of the one or more services.

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

20 . The method of claim 11 , wherein obtaining system information comprises:
receiving system information for the one or more services, wherein the system information includes information identifying the one or more services for which the system information is valid.

21 . The method of claim 11 , wherein obtaining system information comprises:
receiving system information for one of the one or more services; determining whether additional system information for the one of the one or more services is needed; and requesting additional system information for the one of the one or more services based at least in part on the determining.

22 . The method of claim 11 , wherein the one or more services include one or more of an energy efficient service, a high reliability service, a low latency service, a broadcast service, or a small data service.

23 . The method of claim 11 , wherein obtaining system information comprises:
receiving system information for the one or more services, wherein the system information includes information identifying a validity time period; and re-obtaining system information for the one or more services upon expiration of the validity time period.

24 . The method of claim 23 , 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.

25 . A method for wireless communication, comprising:
transmitting a first signal, the first signal including an indication of whether system information is to be requested by a user equipment (UE); and transmitting system information in accordance with the indication.

26 . The method of claim 25 , further comprising:
receiving a request for system information in accordance with the indication; and transmitting system information in response to the request.

27 . The method of claim 25 , wherein transmitting system information comprises:
transmitting system information via a second signal in accordance with the indication, the second signal being transmitted via a broadcast or broad-beam operation.

28 . The method of claim 25 , further comprising:
including, in the first signal, information indicating where a request for system information is to be sent.

29 . The method of claim 25 , further comprising:
including, in the first signal, information indicating a predetermined channel on which system information is to be transmitted via a broadcast or broad-beam operation.

30 . The method of claim 25 , wherein transmitting system information comprises:
transmitting system information in accordance with the indication and a transmission mode.

31 . The method of claim 30 , further comprising:
changing the

Assignees

• Qualcomm Inc

Inventors

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

Classifications

• H04B7/0413 Primary

  MIMO systems · CPC title

• H04L12/18

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

• H04W48/12 Primary

  using downlink control channel · 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