# US 2017/0289869 A1 · User equipments, base stations and methods

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- Number: US 2017/0289869 A1
- Document ID: US20170289869A1
- Status: Published application
- Kind: A1
- Application number: 15/470,656
- Filed: 2017-03-27
- Published: 2017-10-05
- Earliest claimed: 2016-03-29
- Assignees: Sharp Laboratories of America, Inc.
- Applicants: Sharp Laboratories of America, Inc.
- Inventors: Toshizo Nogami; Zhanping Yin
- Web page: https://patentgrep.com/patent/US20170289869A1

## CPC

- H04W 36/0066: {of control information between different types of networks in order to establish a new radio link in the target network}
- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04W 36/0077: {of access information of target access point}
- H04W 36/06: Reselecting a communication resource in the serving access point
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH}
- H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA]
- 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)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A user equipment (UE) is described that includes a PDCCH receiver configured to receive a PDCCH with a DCI format, the PDCCH scheduling a first physical uplink shared channel (PUSCH) in subframe n and a second PUSCH in subframe n+1, the DCI format including an information field for indicating that a starting position of the first PUSCH is later than an initial boundary of an initial symbol of the subframe n. The UE also includes a channel sensor configured to perform a first channel access before the first PUSCH. The UE further includes a PUSCH transmitter configured to transmit the first PUSCH and the second PUSCH, in a case when the first channel access is successful. The channel sensor is further configured to, in a case when the first channel access is not successful, perform a second channel access before the second PUSCH.

## Claims

### Claim 1

A user equipment (UE) comprising:
a physical downlink control channel (PDCCH) receiver configured to receive a PDCCH with a downlink control information (DCI) format, the PDCCH scheduling a first physical uplink shared channel (PUSCH) in subframe n and a second PUSCH in subframe n+1, the DCI format including an information field for indicating that a starting position of the first PUSCH is later than an initial boundary of an initial symbol of the subframe n;
a channel sensor configured to perform a first channel access before the first PUSCH; and
a PUSCH transmitter configured to transmit the first PUSCH and the second PUSCH, in a case when the first channel access is successful, wherein
the channel sensor is further configured to, in a case when the first channel access is not successful, perform a second channel access before the second PUSCH,
the PUSCH transmitter is further configured to, in a case when the second channel access is successful, transmit the second PUSCH, and
a starting position of the second PUSCH is an initial boundary of an initial symbol of the subframe n+1.

### Claim 2 (depends on 1)

The UE of claim 1, wherein
an additional cyclic prefix signal is attached to the first PUSCH.

### Claim 3 (depends on 1)

The UE of claim 1, wherein
the first channel access and the second channel access are based on a same channel access procedure.

### Claim 4

An evolved node B (eNB) comprising:
a physical downlink control channel (PDCCH) transmitter configured to transmit a PDCCH with a downlink control information (DCI) format, the PDCCH scheduling a first physical uplink shared channel (PUSCH) in subframe n and a second PUSCH in subframe n+1, the DCI format including an information field for indicating that a starting position of the first PUSCH is later than an initial boundary of an initial symbol of the subframe n; and
a PUSCH receiver configured to attempt to receive the first PUSCH, wherein
the PUSCH receiver is further configured to, in a case when the first PUSCH is not received, attempt to receive the second PUSCH, and
a starting position of the second PUSCH is an initial boundary of an initial symbol of the subframe n+1.

### Claim 5 (depends on 4)

The eNB of claim 4, wherein
an additional cyclic prefix signal is attached to the first PUSCH.

### Claim 6

A method for a user equipment (UE), the method comprising:
receiving a physical downlink control channel (PDCCH) with a downlink control information (DCI) format, the PDCCH scheduling a first physical uplink shared channel (PUSCH) in subframe n and a second PUSCH in subframe n+1, the DCI format including an information field for indicating that a starting position of the first PUSCH is later than an initial boundary of an initial symbol of the subframe n;
performing a first channel access before the first PUSCH; and
transmitting the first PUSCH and the second PUSCH, in a case when the first channel access is successful, wherein
in a case when the first channel access is not successful, a second channel access is performed before the second PUSCH,
in a case when the second channel access is successful, the second PUSCH is transmitted, and
a starting position of the second PUSCH is an initial boundary of an initial symbol of the subframe n+1.

### Claim 7 (depends on 6)

The method of claim 6, further comprising wherein
an additional cyclic prefix signal is attached to the first PUSCH.

### Claim 8 (depends on 6)

The method of claim 6, wherein
the first channel access and the second channel access are based on a same channel access procedure.

### Claim 9

A method for an evolved node B (eNB), the method comprising:
transmitting a physical downlink control channel (PDCCH) with a downlink control information (DCI) format, the PDCCH scheduling a first physical uplink shared channel (PUSCH) in subframe n and a second PUSCH in subframe n+1, the DCI format including an information field for indicating that a starting position of the first PUSCH is later than an initial boundary of an initial symbol of the subframe n; and
attempting to receive the first PUSCH, wherein
in a case when the first PUSCH is not received, the eNB attempts to receive the second PUSCH, and
a starting position of the second PUSCH is an initial boundary of an initial symbol of the subframe n+1.

### Claim 10 (depends on 9)

The method of claim 9, wherein
an additional cyclic prefix signal is attached to the first PUSCH.