公开(公告)号：US20240323726A1

公开(公告)日：2024-09-26

申请号：US18124801

申请日：2023-03-22

Applicant: KDDI Research, Inc. ,  University of Southern California

Inventor： Masaaki ITO ,  Issei KANNO ,  Kosuke YAMAZAKI ,  Andreas F. MOLISCH

IPC: H04W24/10

CPC classification number: H04W24/10

Abstract: A method performed by a processing apparatus of a cell-free communication system that includes a plurality of access points (APs) is provided. The method includes: transmitting, to a wireless device via a master AP among one or more APs included in a cluster associated with the wireless device, measurement information for the wireless device to determine a measurement target AP for which the wireless device measures a channel state; and receiving, as a response to the measurement information, channel state information indicating the channel state to the measurement target AP, via the master AP.

公开(公告)号：US20240323762A1

公开(公告)日：2024-09-26

申请号：US18124808

申请日：2023-03-22

Applicant: KDDI Research, Inc. ,  University of Southern California

Inventor： Masaaki ITO ,  Issei KANNO ,  Yoshiaki AMANO ,  Andreas F. MOLISCH

IPC: H04W28/086 ,  H04W72/121

CPC classification number: H04W28/086 ,  H04W72/121

Abstract: The method includes: executing, when first APs that are changed from a cluster AP to a non-cluster AP due to a change of a cluster occurs, first processing on processing target APs including the first APs and a second AP that is the non-cluster AP satisfying a predetermined condition in relation to the first APs, and thereby determining, as an operation mode of the processing target APs. The first processing includes: selecting one first processing target AP from the processing target APs, and determining a downstream-only mode as the operation mode of the one first processing target AP, and determining a upstream-only mode or a sleep mode as the operation mode of a second processing target AP that is different from the one first processing target AP and is among the processing target APs.

公开(公告)号：US20250016600A1

公开(公告)日：2025-01-09

申请号：US18897281

申请日：2024-09-26

Applicant: KDDI Research, Inc.

Inventor： Issei KANNO ,  Takeo OHSEKI ,  Shunsuke KAMIWATARI

IPC: H04W24/10 ,  H04W8/22 ,  H04W16/28 ,  H04W28/16

Abstract: A terminal device that comprises a plurality of antennas measures a signal transmitted from a base station device in a network to which the terminal device belongs, using each of the plurality of antennas, performs determination of whether or not a first antenna and a second antenna included in the plurality of antennas has a predetermined characteristic in common, the predetermined characteristic being specified based on the measured signal, and notifies the network to which the terminal device belongs of information indicating a result of the determination.

公开(公告)号：US20250015516A1

公开(公告)日：2025-01-09

申请号：US18897337

申请日：2024-09-26

Applicant: KDDI Research, Inc.

Inventor： Takeo OHSEKI ,  Issei KANNO ,  Shunsuke KAMIWATARI ,  Kosuke YAMAZAKI

IPC: H01Q21/28 ,  H04L5/00

Abstract: A terminal device that comprises a plurality of antennas notifies a network to which the terminal device belongs of information according to which it is possible to specify at least one of, among the plurality of antennas, a second antenna having a predetermined characteristic in common with a first antenna included in the plurality of antennas, and a third antenna not having the predetermined characteristic in common with the first antenna.