Title:
USER DEVICE AND BASE STATION
Document Type and Number:
WIPO Patent Application WO/2018/128038
Kind Code:
A1
Abstract:
A transmission method of a reference signal is provided which takes into account interference between adjacent cells in a radio communication system capable of dynamically switching between uplink communication and downlink communication. This user device is provided with a transmitting and receiving unit which transmits and receives radio signals to and from a base station in accordance with a transmission method that switches dynamically between uplink communication and downlink communication, and a diffusion processing unit which multiplies uplink radio resources, notified from the base station, by an orthogonal code. The diffusion processing unit multiplies a demodulation reference signal, transmitted in the uplink radio resources notified from the base station, by an uplink orthogonal code different from the downlink orthogonal code applied in the corresponding downlink radio resources in the adjacent base station, and the transmission and receiving unit transmits a demodulation reference signal, multiplied by the uplink orthogonal code, to the base station in the uplink radio resources.
Inventors:
SANO YOUSUKE (JP)
TAKEDA KAZUKI (JP)
NAGATA SATOSHI (JP)
GUO SHAOZHEN (CN)
TAKEDA KAZUKI (JP)
NAGATA SATOSHI (JP)
GUO SHAOZHEN (CN)
Application Number:
PCT/JP2017/043523
Publication Date:
July 12, 2018
Filing Date:
December 04, 2017
Export Citation:
Assignee:
NTT DOCOMO INC (JP)
International Classes:
H04J13/18; H04L27/26; H04W72/04
Domestic Patent References:
| WO2016125223A1 | 2016-08-11 |
Foreign References:
| US20160278077A1 | 2016-09-22 | |||
| JP2017001451A | 2017-01-05 |
Other References:
HUAWEI HISILICON: "Symmetric RS design for flexible duplex", 3GPP TSG RAN WG1 MEETING#87, no. R1-1611226, 5 November 2016 (2016-11-05), XP051189798
SAMSUNG: "RS Design for Cross-link Interference in Dynamic TDD", 3GPP RAN WG1 MEETING # 87, no. R1-1612564, 4 November 2016 (2016-11-04), XP051189633
LG ELECTRONICS: "Discussion on dynamic and semi-static DL/UL configuration for inter-cell interference coordination/handling", 3GPP RAN WG1 MEETING # 87, no. R1-1611859, 5 November 2016 (2016-11-05), XP051190204
HUAWEI; HISILICON: "Discussion on TRP-to-TRP interference mitigation schemes", 3GPP TSG-RAN WG1 MEETING # 86, no. R1-1608830, 1 October 2016 (2016-10-01), XP051159157
3GPP TR 36.829 V11.1.0, December 2012 (2012-12-01)
See also references of EP 3567763A4
SAMSUNG: "RS Design for Cross-link Interference in Dynamic TDD", 3GPP RAN WG1 MEETING # 87, no. R1-1612564, 4 November 2016 (2016-11-04), XP051189633
LG ELECTRONICS: "Discussion on dynamic and semi-static DL/UL configuration for inter-cell interference coordination/handling", 3GPP RAN WG1 MEETING # 87, no. R1-1611859, 5 November 2016 (2016-11-05), XP051190204
HUAWEI; HISILICON: "Discussion on TRP-to-TRP interference mitigation schemes", 3GPP TSG-RAN WG1 MEETING # 86, no. R1-1608830, 1 October 2016 (2016-10-01), XP051159157
3GPP TR 36.829 V11.1.0, December 2012 (2012-12-01)
See also references of EP 3567763A4
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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