System information scheduling in machine type communication

Patent metadata

Field	Value
Publication number	US-2017325049-A1
Application number	US-201715647141-A
Country	US
Kind code	A1
Filing date	Jul 11, 2017
Priority date	Apr 10, 2015
Publication date	Nov 9, 2017
Grant date	—

Abstract

The present disclosure relates to an apparatus for receiving system information in a wireless communication system including a receiver that receives system information configuration information and receives system information in predetermined subframes of a radio interface, and a controller that determines the predetermined subframes according to the received system information configuration information and controls the receiver to receive the system information in the predetermined subframes, wherein the system information configuration information includes a subframe scheduling field with a plurality of bits, each bit being associated with a subframe and representing whether or not system information is to be received in that subframe. The present disclosure further relates to a corresponding apparatus for transmitting system information and to the respective receiving and transmitting methods.

First claim

What is claimed is:

1 . An apparatus for receiving system information in a wireless communication system; comprising:
a receiver that receives system information configuration information and receives system information in predetermined subframes of a radio interface; and a controller that determines the predetermined subframes according to the received system information configuration information and controls the receiver to receive the system information in the predetermined subframes, wherein the system information configuration information includes a subframe scheduling field with a plurality of bits, each bit being associated with a subframe and representing whether or not system information is to be received in that subframe.

2 . An apparatus for transmitting system information in a wireless communication system, comprising:
a configurator that configures subframes to carry or not to carry system information, generates system information configuration information indicating the configuration; and controls a transmitter to transmit the system information in the configured subframes; and the transmitter that transmits the system information configuration information and transmits the system information in the configured subframes of a radio interface, wherein the system information configuration information includes a subframe scheduling field with a plurality of bits, each bit being associated with a subframe and representing whether or not system information is to be received in that subframe.

3 . The apparatus according to claim 1 , wherein:
the number of bits of the system information configuration information associated with respective subframes is less than or equal to the number of subframes in a radio frame; none of the bits is associated with at least one of: subframes used for reception of system information configuration information, subframes used for a physical broadcast channel, and subframes configured for multimedia broadcast operation; and the system information is transmitted only on subframes indicated by the bits in the subframe scheduling field of the system information configuration information.

4 . The apparatus according to claim 1 , wherein
the system information configuration information is received either within a master information message of a radio resource control protocol carried on a physical broadcast channel or within a system information message of the radio resource control protocol scheduled in the master information message, and the system information configuration information further comprises an indication of the frequency resources for the system information including at least one of a location and/or number of physical resource blocks reserved for the system information, and/or whether or not frequency hopping is applied.

5 . The apparatus according to claim 1 , wherein
said apparatus is a machine type communication, MTC, terminal; said system information is system information for MTC; and none of the bits in the subframe scheduling field is associated with subframes carrying system information for other type of communication.

6 . The apparatus according to claim 1 , wherein
the system information configuration information further comprises a subframe scheduling field application indicator for indicating whether or not a multimedia broadcast scheduling information is to be used; and the controller is configured, when the subframe scheduling field application indicator has a first value, to
receive the multimedia broadcast scheduling information indicating subframes used for multimedia broadcast communication, and
determine the predetermined subframes in accordance with the multimedia broadcast scheduling information by excluding the subframes used for multimedia broadcast communication, and
not to receive or take into account the multimedia broadcast scheduling information when the subframe scheduling field application indicator has another value different from the first value.

7 . The apparatus according to claim 6 , wherein
the multimedia broadcast scheduling information includes a subframe scheduling field with a plurality of bits, each bit being associated with a subframe and representing whether or not multimedia broadcast is to be transmitted in that subframe; the controller is configured to determine the predetermined subframes by applying a logical AND between bits of a bitmap representing the subframes in which the system information is to be received and the subframes in which the multimedia broadcast is not transmitted.

8 . The apparatus according to claim 1 , wherein
the system information configuration information includes:
a first subframe scheduling field and a second subframe scheduling field of which each includes subfields for some respective subframes; and
scheduling information indicating to which frames the second subframe scheduling field applies, and
the second subframe scheduling field is applied to the frames indicated by the scheduling information whereas the first subframe scheduling field is applied to any other frames.

9 . The apparatus according to claim 8 , wherein
the second subframe scheduling field has no bits associated with some predefined subframes, and the system information configuration information includes a first bitmap application bit for indicating whether or not the bits of the first subframe scheduling field associated with said predefined frames are to be applicable for the frames indicated in the scheduling information.

10 . The apparatus according to claim 1 , wherein
a master information message transmitted on a physical broadcast channel includes scheduling information concerning subframe scheduling of a first system information which includes the system information configuration information, and none of the bits of the subframe scheduling field is associated with subframes indicated as carrying the first system information in said scheduling information.

11 . The apparatus according to claim 10 , wherein the scheduling information consists of a predefined number of predefined combinations of at least two of: first system information size, subframes in which the first system information can be scheduled, application of frequency hopping, frequency hopping pattern and frequency allocation.

12 . The apparatus according to claim 2 being a base station controlling a cell of the wireless communication system.

13 . A method for receiving system information in a wireless communication system, comprising:
receiving system information configuration information and receiving system information in predetermined subframes of a radio interface; and determining the predetermined subframes according to the received system information configuration information and controlling the receiving of the system information to take place in the predetermined subframes, wherein the system information configuration information includes a subframe scheduling field with a plurality of bits, each bit being associated with a subframe and representing whether or not system information is to be received in that subframe.

14 . A method for transmitting system information in a wireless communication system, comprising:
configuring subframes to carry or not to carry system information, generating system information configuration information indicating the configuration, and controlling a transmitter to transmit the system information in the configured subframes; and transmitting the system information configuration information and transmitting the system information in the configured subframes of

Assignees

• Panasonic Ip Corp America

Inventors

• Basu Mallick Prateek
• Suzuki Hidetoshi
• Loehr Joachim

Classifications

• H04W72/30 Primary

  Resource management for broadcast services · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W4/70 Primary

  Services for machine-to-machine communication [M2M] or machine type communication [MTC] · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04W48/12

  using downlink control channel · CPC title