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公开(公告)号：US10945169B2
公开(公告)日：2021-03-09
申请号：US16092659
申请日：2017-03-03
Applicant: SoftBank Corp.
Inventor： Noboru Kanazawa , Daigo Ogata , Atsushi Nagate , Teruya Fujii
Abstract: A base station, a mobile communication system and a handover control method are provided, which are capable of preventing a handover failure and a ping-pong handover phenomenon which are caused by an interference from a neighboring cell to a serving cell. When a received power difference (S2−S1) between a received power S2 from a neighboring second base station, which is fed back from a mobile station, and a received power S1 from first base station, becomes larger than a predetermined threshold value, the first base station to which the mobile station is connected requests the second base station to stop a transmission of a downlink signal including at least one of a data signal and a control signal. In response to the transmission-stop request, the second base station performs a determination of a radio resource in which the transmission of the downlink signal is to be stopped and a notification of the radio resource to the first base station, and stops a transmission of a downlink signal. The first base station allocates the radio resource notified from the second base station or a radio resource partially including the notified radio resource, as a radio resource used for the downlink signal to the mobile station.
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公开(公告)号：US10862614B2
公开(公告)日：2020-12-08
申请号：US16072249
申请日：2017-01-25
Applicant: SoftBank Corp.
Inventor： Daigo Ogata , Atsushi Nagate , Teruya Fujii
IPC: H04L1/00 , H04W16/32 , H04L1/16 , H04L5/00 , H04L1/18 , H04W28/04 , H04J11/00 , H04L27/26 , H04W72/04 , H04W72/08 , H04B7/0413
Abstract: A base station apparatus capable of preventing occurrence of a communication delay when performing an inter-cell interference control using an ABS is provided. The base station apparatus is capable of performing an inter-cell interference control by setting an ABS pattern with one cycle of a predetermined number of subframes, and when the ABS pattern is to be switched, changes an MCS (Modulation and Coding Scheme) index value to be determined by an adaptive modulation control, for a communication within a predetermined period of time on or before a switching time of the switching, with respect to a subframe in which a communication with a mobile station apparatus is allowed before switching the ABS pattern.
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公开(公告)号：US20190174373A1
公开(公告)日：2019-06-06
申请号：US16092659
申请日：2017-03-03
Applicant: SoftBank Corp.
Inventor： Noboru Kanazawa , Daigo Ogata , Atsushi Nagate , Teruya Fujii
Abstract: A base station, a mobile communication system and a handover control method are provided, which are capable of preventing a handover failure and a ping-pong handover phenomenon which are caused by an interference from a neighboring cell to a serving cell. When a received power difference (S2−S1) between a received power S2 from a neighboring second base station, which is fed back from a mobile station, and a received power S1 from first base station, becomes larger than a predetermined threshold value, the first base station to which the mobile station is connected requests the second base station to stop a transmission of a downlink signal including at least one of a data signal and a control signal. In response to the transmission-stop request, the second base station performs a determination of a radio resource in which the transmission of the downlink signal is to be stopped and a notification of the radio resource to the first base station, and stops a transmission of a downlink signal. The first base station allocates the radio resource notified from the second base station or a radio resource partially including the notified radio resource, as a radio resource used for the downlink signal to the mobile station.
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公开(公告)号：US20190036641A1
公开(公告)日：2019-01-31
申请号：US16072249
申请日：2017-01-25
Applicant: SoftBank Corp.
Inventor： Daigo Ogata , Atsushi Nagate , Teruya Fujii
Abstract: A base station apparatus capable of preventing occurrence of a communication delay when performing an inter-cell interference control using an ABS is provided. The base station apparatus is capable of performing an inter-cell interference control by setting an ABS pattern with one cycle of a predetermined number of subframes, and when the ABS pattern is to be switched, changes an MCS (Modulation and Coding Scheme) index value to be determined by an adaptive modulation control, for a communication within a predetermined period of time on or before a switching time of the switching, with respect to a subframe in which a communication with a mobile station apparatus is allowed before switching the ABS pattern.
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