Title:
INTERFERENCE SUPPRESSION DEVICE, SYSTEM, INTER-BASE STATION CONTROL METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2024/043072
Kind Code:
A1
Abstract:
In a HetNet configuration in which a plurality of small-sized second cells are disposed in a first cell, the present invention reduces a signal processing amount for suppressing interference to an uplink reception signal of a base station in any one cell from another cell. This interference suppression device: creates a first propagation path response matrix including a plurality of first propagation path responses to a first base station from terminals in the plurality of second cells; creates a second propagation path response matrix including a plurality of second propagation path responses to a plurality of second base stations from terminals in the plurality of second cells; calculates a plurality of reception weights on the basis of the first propagation response matrix and an inverse matrix to the second propagation response matrix; and suppresses interference to the uplink of the first base station on the basis of reception signals of the first base station, reception signals of the plurality of second base stations, and the plurality of reception weights. The interference suppression device sets, to 0, the second propagation response, which has power of which the magnitude is equal to or smaller than a prescribed threshold or smaller than the threshold, among the plurality of second propagation responses included in the second propagation response matrix before calculating the inverse matrix.
Inventors:
KANEDA TAKUYA (JP)
FUJII TERUYA (JP)
FUJII TERUYA (JP)
Application Number:
PCT/JP2023/028871
Publication Date:
February 29, 2024
Filing Date:
August 08, 2023
Export Citation:
Assignee:
SOFTBANK CORP (JP)
International Classes:
H04B7/022; H04B1/10; H04B7/08; H04W16/32; H04W24/04; H04W28/18
Foreign References:
| JP2015510297A | 2015-04-02 | |||
| JP2007513584A | 2007-05-24 |
Other References:
KANEDA TAKUYA, FUJII TERUYA: "Network cooperation uplink interference in HetNet configuration Canceller", IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS, IEICE, JP, vol. J104-B, no. 8, 1 August 2021 (2021-08-01), JP , pages 723 - 726, XP093144623, ISSN: 1881-0209, DOI: 10.14923/transcomj.2020JBL4007
TAKUYA KANEDA, TERUYA FUJII: "B-5-82 Reduction of processing amount of macro cell base station uplink interference canceller in HetNet configuration", PROCEEDINGS OF THE 2021 IEICE GENERAL CONFERENCE (COMMUNICATION 1); MARCH 09-12, 2021, IEICE, JP, 23 February 2021 (2021-02-23) - 12 March 2021 (2021-03-12), JP, pages 359, XP009553085
TAKUYA KANEDA, TERUYA FUJII : "A Study on Uplink Interference Canceller eliminating other small cell interference in HetNet Construction", IEICE TECHNICAL REPORT, RCS, vol. 119, no. 296 (RCS2019-217), 13 November 2019 (2019-11-13), JP , pages 85 - 90, XP009553079, ISSN: 2432-6380
TAKUYA KANEDA, TERUYA FUJII: "B-5-82 Reduction of processing amount of macro cell base station uplink interference canceller in HetNet configuration", PROCEEDINGS OF THE 2021 IEICE GENERAL CONFERENCE (COMMUNICATION 1); MARCH 09-12, 2021, IEICE, JP, 23 February 2021 (2021-02-23) - 12 March 2021 (2021-03-12), JP, pages 359, XP009553085
TAKUYA KANEDA, TERUYA FUJII : "A Study on Uplink Interference Canceller eliminating other small cell interference in HetNet Construction", IEICE TECHNICAL REPORT, RCS, vol. 119, no. 296 (RCS2019-217), 13 November 2019 (2019-11-13), JP , pages 85 - 90, XP009553079, ISSN: 2432-6380
Attorney, Agent or Firm:
KURODA Hisashi et al. (JP)
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