Terminal apparatus, base station apparatus, and communication method

Patent metadata

Field	Value
Publication number	US-12336038-B2
Application number	US-202017425548-A
Country	US
Kind code	B2
Filing date	Jan 24, 2020
Priority date	Jan 24, 2019
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

Methods for a terminal apparatus are disclosed, comprising: receiving a transmission band configuration, wherein the transmission band configuration is provided by an initial downlink bandwidth part (DL BWP) in case that at least one predetermined condition is satisfied, the transmission band configuration is provided by a dedicated radio resource control (RRC) message in case that the at least one predetermined condition is not satisfied, the predetermined condition includes a dedicated RRC parameter is not provided, the terminal apparatus is in idle mode, the terminal apparatus performs an initial connection, the terminal apparatus does not support at least one of one or more carrier bands based on a parameter in a common RRC message, the terminal apparatus supports a band of the initial DL BWP, and the terminal apparatus supports a band of a control resource set with an index equals to zero.

First claim

What is claimed is:

1. A user equipment (UE) communicating with a base station (BS) on a serving cell, the UE comprising:
at least one processor; and
at least one non-transitory computer-readable medium coupled to the at least one processor and storing one or more computer-executable instructions that, when executed by the at least one processor, cause the UE to:
determine, based on a UE-specific radio resource control (RRC) parameter provided by a UE-specific RRC message or a parameter provided by system information block 1 (SIB1), a transmission bandwidth configuration, wherein the parameter indicates frequency location and size of an initial downlink (DL) bandwidth part (BWP); and
receive a DL-shared channel (SCH) in an active DL BWP in a carrier corresponding to the transmission bandwidth configuration, wherein:
in a case that the UE-specific RRC parameter is provided, the transmission bandwidth configuration is determined based on the UE-specific RRC parameter, and
in a case that the UE-specific RRC parameter is not provided, the transmission bandwidth configuration is determined based on the parameter.

2. The UE of claim 1 , wherein, in a case that the UE-specific RRC parameter is not provided, the transmission bandwidth configuration is determined further based on whether the UE supports a bandwidth of the initial DL BWP.

3. A base station (BS) communicating with a user equipment (UE) on a serving cell, the BS comprising:
at least one processor; and
at least one non-transitory computer-readable medium coupled to the at least one processor and storing one or more computer-executable instructions that, when executed by the at least one processor, cause the BS to:
determine, based on a UE-specific radio resource control (RRC) parameter provided by a UE-specific RRC message or a parameter provided by system information block 1 (SIB1), a transmission bandwidth configuration, wherein the parameter indicates frequency location and size of an initial downlink (DL) bandwidth part (BWP); and
transmit a DL-shared channel (SCH) in an active DL BWP in a carrier corresponding to the transmission bandwidth configuration, wherein:
in a case that the UE-specific RRC parameter is provided, the transmission bandwidth configuration is determined based on the UE-specific RRC parameter, and
in a case that the UE-specific RRC parameter is not provided, the transmission bandwidth configuration is determined based on the parameter.

4. The BS of claim 3 , wherein, in a case that the UE-specific RRC parameter is not provided, the transmission bandwidth configuration is determined further based on whether the UE supports a bandwidth of the initial DL BWP.

5. A method performed by a user equipment (UE) communicating with a base station (BS) on a serving cell, the method comprising:
determining, based on a UE-specific radio resource control (RRC) parameter provided by a UE-specific RRC message or a parameter provided by system information block 1 (SIB1), a transmission bandwidth configuration, wherein the parameter indicates frequency location and size of an initial downlink (DL) bandwidth part (BWP); and
receiving a DL-shared channel (SCH) in an active DL BWP in a carrier corresponding to the transmission bandwidth configuration, wherein:
in a case that the UE-specific RRC parameter is provided, the transmission bandwidth configuration is determined based on the UE-specific RRC parameter, and
in a case that the UE-specific RRC parameter is not provided, the transmission bandwidth configuration is determined based on the parameter.

6. The method of claim 5 , wherein, in a case that the UE-specific RRC parameter is not provided, the transmission bandwidth configuration is determined further based on whether the UE supports a bandwidth of the initial DL BWP.

Assignees

• Sharp Kk

Inventors

• Yoshimura Tomoki
• Suzuki Shoichi
• Nogami Toshizo
• Ouchi Wataru
• Lee Taewoo
• Lin Huifa

Classifications

• H04L5/0098

  Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands · CPC title

• H04L5/0044

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title

• H04W76/27 Primary

  Transitions between radio resource control [RRC] states · CPC title

• H04W72/0453 Primary

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title