TRANSMISSION DEVICE AND COMMUNICATION METHOD

WIPO Patent Application WO/2018/030191

A1

When a plurality of terminal devices are contained in a contention-based radio communication system and share frequency resources, the number of terminal device data signals subjected to nonorthogonal multiplexing in a spatial region increases. If a number of terminal devices, said number exceeding the number of reception antennas and the spreading rate, simultaneously transmits uplink data, terminal devices using the same spreading code are present, and interference can occur between users. This transmission device, which transmits data signals to a reception device, comprises: a transmission processing unit which transmits the data signals without receiving transmission permission control information transmitted by the reception device; a spreading unit which spreads the data signal; and a transmission power control unit which can switch between a plurality of methods for controlling the transmission power of the data signals. The spreading unit switches the control method for the transmission power in accordance with at least one among the spreading rate used for the spreading of the data signals and a spreading code string.

GOTO JUNGO
NAKAMURA OSAMU
YOSHIMOTO TAKASHI
HAMAGUCHI YASUHIRO

PCT/JP2017/027643

February 15, 2018

July 31, 2017

Click for automatic bibliography generation  

SHARP KK (JP)

H04B1/7103; H04L27/26; H04W52/50; H04W72/04

WO2009035076A1

2009-03-19

ZTE: "Contention-based non-orthogonal multiple access for UL mMTC", 3GPP TSG-RAN WG1#85 R1-164269, 14 May 2016 (2016-05-14), XP051096507, Retrieved from the Internet

FUKUCHI Takeo (JP)

View/Download PDF      PDF Help

Previous Patent: POLYMERIZABLE LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL POLYMER

Next Patent: CERAMIC ELECTRONIC COMPONENT