# US 11,452,137 B2 · Terminal apparatus, base station apparatus, communication method, and integrated circuit

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- Number: US 11,452,137 B2
- Document ID: US11452137B2
- Status: Granted
- Kind: B2
- Application number: 16/075,561
- Filed: 2017-01-19
- Published: 2021-03-04
- Granted: 2022-09-20
- Earliest claimed: 2016-02-04
- Assignees: Sharp Kabushiki Kaisha
- Applicants: Sharp Kabushiki Kaisha
- Inventors: Shoichi Suzuki; Tatsushi Aiba; Wataru Ohuchi; Takashi Hayashi
- Web page: https://patentgrep.com/patent/US11452137B2

## CPC

- H04W 48/12: using downlink control channel
- H04W 48/14: using user query {or user detection}
- H04W 74/04: Scheduled access (hybrid access H04W74/02)
- H04W 74/0833: Random access procedures, e.g. with 4-step access
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A terminal apparatus includes a receiver for receiving non-demand SI transmitted regardless of a system information request, and multiple pieces of on-demand SI (System Information) transmitted based on a system information request, and a transmitter for transmitting a system information request to request transmission of a first piece of on-demand SI (System information) among the multiple pieces of on-demand SI.

## Claims

### Claim 1

A terminal apparatus for cellular communications, the terminal apparatus comprising:
a receiver configured to receive, from a base station, multiple pieces of on-demand System Information (SI) and non-demand SI; and
a transmitter configured to transmit, to the base station, a system information request by using either a Physical Random Access Channel (PRACH) or a Physical Uplink Shared Channel (PUSCH), the system information request comprising a request for transmission of a first piece of on-demand SI among the multiple pieces of on-demand SI,
wherein the transmitter is configured to transmit the system information request to request transmission of the first piece of on-demand SI, in a resource belonging to a first set of resources corresponding to the first piece of on-demand SI among multiple sets of resources for transmission of the system information request, by using the PRACH in a case that the non-demand SI includes information for indicating the first set of resources among the multiple sets of resources,
and to transmit the system information request by using the PUSCH unless the non-demand SI includes the information, and
wherein the receiver is configured to receive the non-demand SI transmitted, from the base station, regardless of the system information request.

### Claim 2 (depends on 1)

The terminal apparatus according to claim 1,
wherein the receiver is configured to receive the non-demand SI including information for indicating the multiple sets of resources,
wherein the multiple sets of resources include at least the first set of resources corresponding to the first piece of on-demand SI, and a second set of resources corresponding to a second piece of on-demand SI.

### Claim 3 (depends on 1)

The terminal apparatus according to claim 1, wherein
the receiver is configured to receive the non-demand SI including information for indicating a preamble sequence corresponding to the first piece of on-demand SI, and
the transmitter is configured to transmit the system information request to request transmission of the first piece of on-demand SI including the preamble sequence.

### Claim 4

A base station apparatus for cellular communications, the base station apparatus comprising:
a transmitter configured to transmit, to a terminal apparatus, multiple pieces of on-demand System Information (SI) and non-demand SI; and
a receiver configured to receive, from the terminal apparatus, a system information request by using either a Physical Random Access Channel (PRACH) or a Physical Uplink Shared Channel (PUSCH), the system information request being to request transmission of a first piece of on-demand SI among the multiple pieces of on-demand SI,
wherein the receiver is configured to receive the system information request to request transmission of the first piece of on-demand SI, in a resource belonging to a first set of resources corresponding to the first piece of on-demand SI among multiple sets of resources for transmission of the system information request, by using the PRACH in a case that the non-demand SI includes information for indicating the first set of resources among the multiple sets of resources,
and to receive the system information request by using the PUSCH unless the non-demand SI includes the information, and
wherein the transmitter is configured to transmit the non-demand SI regardless of the system information request.

### Claim 5 (depends on 4)

The base station apparatus according to claim 4,
wherein the transmitter is configured to transmit the non-demand SI including information for indicating the multiple sets of resources,
wherein the multiple sets of resources include at least the first set of resources corresponding to the first piece of on-demand SI, and a second set of resources corresponding to a second piece of on-demand SI.

### Claim 6 (depends on 4)

The base station apparatus according to claim 4, wherein
the transmitter is configured to transmit the non-demand SI including information for indicating a preamble sequence corresponding to the first piece of on-demand SI,
the receiver is configured to receive the system information request to request transmission of the first piece of on-demand SI including the preamble sequence.

### Claim 7

A communication method used for a terminal apparatus, the communication method comprising the steps of:
receiving, from a base station, multiple pieces of on-demand System Information (SI) and non-demand SI; and
transmitting, to the base station, a system information request by using either a Physical Random Access Channel (PRACH) or a Physical Uplink Shared Channel (PUSCH), the system information request being to request transmission of a first piece of on-demand SI among the multiple pieces of on-demand SI, wherein
the system information request to request transmission of the first piece of on-demand SI is transmitted, in a resource belonging to a first set of resources corresponding to the first piece of on-demand SI among multiple sets of resources for transmission of the system information request, by using the PRACH in a case that the non-demand SI includes information for indicating the first set of resources among the multiple sets of resources,
the system information request is transmitted by using the PUSCH unless the non-demand SI includes the information, and
the non-demand SI is transmitted, from the base station, regardless of the system information request.

### Claim 8 (depends on 7)

The communication method according to claim 7, wherein
the non-demand SI including information for indicating the multiple sets of resources is received, wherein
the multiple sets of resources include at least the first set of resources corresponding to the first piece of on-demand SI, and a second set of resources corresponding to a second piece of on-demand SI.

### Claim 9 (depends on 7)

The communication method according to claim 7, wherein
the non-demand SI including information for indicating a preamble sequence corresponding to the first piece of on-demand SI is received,
the system information request to request transmission of the first piece of on-demand SI including the preamble sequence is transmitted.

### Claim 10

A communication method used for a base station apparatus, the communication method comprising the steps of:
transmitting, to a terminal apparatus, multiple pieces of on-demand System Information (SI) and non-demand SI; and
receiving, from the terminal apparatus, a system information request by using either a Physical Random Access Channel (PRACH) or a Physical Uplink Shared Channel (PUSCH), the system information request being to request transmission of a first piece of on-demand SI among the multiple pieces of on-demand SI, wherein
the system information request to request transmission of the first piece of on-demand SI is received, in a resource belonging to a first set of resources corresponding to the first piece of on-demand SI among multiple sets of resources for transmission of the system information request, by using the PRACH in a case that the non-demand SI includes information for indicating the first set of resources among the multiple sets of resources,
the system information request is received by using the PUSCH unless the non-demand SI includes the information, and
the non-demand SI is transmitted regardless of the system information request.

### Claim 11 (depends on 10)

The communication method according to claim 10,
wherein the non-demand SI including information for indicating the multiple sets of resources is transmitted,
wherein the multiple sets of resources include at least the first set of resources corresponding to the first piece of on-demand SI, and a second set of resources corresponding to a second piece of on-demand SI.

### Claim 12 (depends on 10)

The communication method according to claim 10,
wherein the non-demand SI including information for indicating a preamble sequence corresponding to the first piece of on-demand SI is transmitted,
the system information request to request transmission of the first piece of on-demand SI including the preamble sequence is received.