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Title:
TIME DIVISION DUPLEX COMMUNICATION SYSTEM AND METHOD COMBINING SPREAD SPECTRUM AND NARROW-BAND MIMO
Document Type and Number:
WIPO Patent Application WO/2019/128379
Kind Code:
A1
Abstract:
Disclosed are a time division duplex communication system and method combining spread spectrum and narrow-band MIMO. The system comprises a base station and terminals, wherein the base station is provided with multiple antennae, there are multiple terminals, and each terminal is a single antenna. The communication method between the base station and the terminals involves: in a downlink, a base station using spread spectrum communication technology to transmit a signal to a terminal; in an uplink, the base station using narrow-band MIMO technology to receive the signal transmitted by the terminal via multiple antennae; and the base station setting a maximum retransmission interval of narrow-band time slot synchronization information, and within the interval time, the base station transmitting the narrow-band time slot synchronization information to the terminal at least once, and after receiving the narrow-band time slot synchronization information transmitted by the base station, the terminal determining the number of narrow-band sub time slots in a narrow-band time slot as well as a start time and an end time, and selecting a narrow-band sub time slot to transmit an uplink signal. By means of the present invention, the advantages of low power consumption and long transmission distance of narrow-band communication applied to the Internet of Things can be retained, and the shortcoming of frequency selective fading thereof can also be overcome.

Inventors:
QU DAIMING (CN)
WANG ZHIBING (CN)
HE HUI (CN)
LIU JINGSHUN (CN)
WU HUAYI (CN)
Application Number:
PCT/CN2018/109676
Publication Date:
July 04, 2019
Filing Date:
October 10, 2018
Export Citation:
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Assignee:
WUHAN TURBO TECH CORPORATION (CN)
International Classes:
H04B1/7073
Domestic Patent References:
WO2017167885A12017-10-05
Foreign References:
CN107947829A2018-04-20
CN106160784A2016-11-23
CN106487573A2017-03-08
CN102077657A2011-05-25
Other References:
NOKIA: "Overall scope of NR coexistence study", TSG-RAN WORKING GROUP 4 (RADIO) MEETING #78BIS R4-163814, 22 May 2016 (2016-05-22), XP051106753
Attorney, Agent or Firm:
KEYCOM PARTNERS, P. C. (CN)
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