Base station apparatus, terminal apparatus, communication method, and integrated circuit

Patent metadata

Field	Value
Publication number	US-2021168858-A1
Application number	US-201917258592-A
Country	US
Kind code	A1
Filing date	Jul 9, 2019
Priority date	Jul 17, 2018
Publication date	Jun 3, 2021
Grant date	—

Abstract

To enable efficient communication between a terminal apparatus and a base station apparatus. A terminal apparatus includes: a reception unit configured to receive a first DCI format scrambled by TC-RNTI in a search space set; and a control unit configured to identify resource allocation of a PUSCH based on a second field indicating frequency domain resource assignment included in the first DCI format, wherein bits of a first field indicating frequency resource assignment indicated by a first UL grant included in an RAR message are truncated from a least significant bit and/or a most significant bit is inserted into the bits, based on the number of first resource blocks indicating a bandwidth of a first UL BWP, a size of the second field is derived from a bandwidth of an initial UL BWP, and the control unit identifies, based on a value of RIV indicated by the second field, resource block allocation of the PUSCH in a frequency direction, the resource block allocation being applied to the first UL BWP.

First claim

1 . A terminal apparatus performing random access procedure comprising:
a reception unit configured to receive an initial Uplink (UL) Bandwidth Part (BWP) configuration for an initial UL BWP and an additional UL BWP configuration for an additional UL BWP via Radio Resource Control (RRC) message, wherein one of the initial UL BWP and the additional UL BWP is activated as an active UL BWP, and to receive, in a first search space set, a PDCCH to schedule a Random Access Response (RAR) including a RAR message including a RAR UL grant, a transmission unit configured to transmit a Physical Uplink Shared Channel (PUSCH) scheduled by the RAR UL grant in the active UL BWP, wherein the RAR UL grant includes a frequency hopping flag field indicating whether to transmit the PUSCH with frequency hopping and a resource allocation field indicating the frequency domain resource allocation for the PUSCH, in a case that the frequency hopping flag is set to 1, a number of most significant bits of the resource allocation field is determined as hopping bit(s) at least based on the size of the initial UL BWP wherein the hopping bit(s) is used to indicate frequency offsets.

2 . The terminal apparatus according to claim 1 , wherein
a DL BWP where the first search space set is configured has a same BWP index with the active UL BWP.

3 . (canceled)

4 . (canceled)

5 . (canceled)

6 . A base station apparatus comprising:
a transmission unit configured to transmit, to a terminal apparatus, an initial Uplink (UL) Bandwidth Part (BWP) configuration for an initial UL BWP and an additional UL BWP configuration for an additional UL BWP via Radio Resource Control (RRC) message, wherein one of the initial UL BWP and the additional UL BWP is activated as an active UL BWP for the terminal apparatus; and a transmission unit further configured to transmit-, to the terminal apparatus, in a first search space set, a PDCCH to schedule a Random Access Response (RAR) including a RAR message including a RAR UL grant, wherein the RAR UL grant includes a frequency hopping flag field indicating whether to transmit a Physical Uplink Shared Channel (PUSCH) with frequency hopping and a resource allocation field indicating the frequency domain resource allocation for the PUSCH, in a case that the frequency hopping flag is set to 1, a number of most significant bits of the resource allocation field is determined as hopping bit(s) at least based on the size of the initial UL BWP wherein the hopping bit(s) is used to indicate frequency offsets; and a reception unit configured to receive the PUSCH scheduled by the RAR UL grant in the active UL BWP of the terminal apparatus.

7 . The base station apparatus according to claim 6 , wherein a DL BWP where the first search space set is configured has a same BWP index with the active UL BWP.

8 . (canceled)

9 . (canceled)

10 . (canceled)

11 . A communication method for a terminal apparatus, the method comprising:
receiving an initial Uplink (UL) Bandwidth Part (BWP) configuration for an initial UL BWP and an additional UL BWP configuration for an additional UL BWP via Radio Resource Control (RRC) message, wherein one of the initial UL BWP and the additional UL BWP is activated as an active UL BWP, and receiving, in a first search space set, a PDCCH to schedule a Random Access Response (RAR) including a RAR message including a RAR UL grant, transmitting a Physical Uplink Shared Channel (PUSCH) scheduled by the RAR UL grant in the active UL BWP, wherein the RAR UL grant includes a frequency hopping flag field indicating whether to transmit the PUSCH with frequency hopping and a resource allocation field indicating the frequency domain resource allocation for the PUSCH, in a case that the frequency hopping flag is set to 1, a number of most significant bits of the resource allocation field is determined as hopping bit(s) at least based on the size of the initial UL BWP wherein the hopping bit(s) is used to indicate frequency offsets.

12 . A communication method for a base station apparatus, the method comprising:
transmitting, to a terminal apparatus, an initial Uplink (UL) Bandwidth Part (BWP) configuration for an initial UL BWP and an additional UL BWP configuration for an additional UL BWP via Radio Resource Control (RRC) message, wherein one of the initial UL BWP and the additional UL BWP is activated as an active UL BWP for the terminal apparatus; and transmitting, to the terminal apparatus, in a first search space set, a PDCCH to schedule a Random Access Response (RAR) including a RAR message including a RAR UL grant, wherein the RAR UL grant includes a frequency hopping flag field indicating whether to transmit a Physical Uplink Shared Channel (PUSCH) with frequency hopping and a resource allocation field indicating the frequency domain resource allocation for the PUSCH, in a case that the frequency hopping flag is set to 1, a number of most significant bits of the resource allocation field is determined as hopping bit(s) at least based on the size of the initial UL BWP wherein the hopping bit(s) is used to indicate frequency offsets; and receiving the PUSCH scheduled by the RAR UL grant in the active UL BWP of the terminal apparatus.

13 . An integrated circuit implemented in a terminal apparatus, the integrated circuit causing the terminal apparatus to perform:
receiving an initial Uplink (UL) Bandwidth Part (BWP) configuration for an initial UL BWP and an additional UL BWP configuration for an additional UL BWP via Radio Resource Control (RRC) message, wherein one of the initial UL BWP and the additional UL BWP is activated as an active UL BWP, and receiving, in a first search space set, a PDCCH to schedule a Random Access Response (RAR) including a RAR message including a RAR UL grant, transmitting a Physical Uplink Shared Channel (PUSCH) scheduled by the RAR UL grant in the active UL BWP, wherein the RAR UL grant includes a frequency hopping flag field indicating whether to transmit the PUSCH with frequency hopping and a resource allocation field indicating the frequency domain resource allocation for the PUSCH, in a case that the frequency hopping flag is set to 1, a number of most significant bits of the resource allocation field is determined as hopping bit(s) at least based on the size of the initial UL BWP wherein the hopping bit(s) is used to indicate frequency offsets.

14 . An integrated circuit implemented in a base station apparatus, the integrated circuit causing the base station apparatus to perform:
transmitting, to a terminal apparatus, an initial Uplink (UL) Bandwidth Part (BWP) configuration for an initial UL BWP and an additional UL BWP configuration for an additional UL BWP via Radio Resource Control (RRC) message, wherein one of the initial UL BWP and the additional UL BWP is activated as an active UL BWP for the terminal apparatus; and transmitting, to the terminal apparatus, in a first search space set, a PDCCH to schedule a Random Access Response (RAR) including a RAR message including a RAR UL grant, wherein the RAR UL grant includes a frequency hopping flag field indicating whether to transmit a Physical Shared Channel (PUSCH) with frequency hopping and a resource allocation field indicating the frequency domain resource allocation for the PUSCH, in a case that the frequency hopping flag is set to 1, a number of most significant bits of the resource allocation field is determined as hopping bit(s) at least based on the size of the initial UL BWP wherein the hopping bit(s) is used to indicate frequency offsets; and receiving the PUSCH scheduled by the RAR UL grant in the active UL BWP of

Assignees

• Sharp Kk
• Fg innovation co ltd

Inventors

• Liu Liqing
• Yamada Shohei
• Takahashi Hiroki
• Hoshino Masayuki
• Tsuboi Hidekazu

Classifications

• H04W72/23

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

• H04W72/53

  based on regulatory allocation policies · CPC title

• H04W74/0838

  using contention-free random access [CFRA] · CPC title

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title

• H04W74/002 Primary

  Transmission of channel access control information · CPC title