Application of SCMA Based on LoRaWAN Architecture

Low-power Wide-Area Network (LPWAN), as a wireless connection technology of the Internet things, has met requirements power consumption network providers and operators, coverage things equipment. As main LPWAN, Long Range (LoRa) entered stage scale deployment. However, in MAC protocol LoRa, multiple end nodes send data to gateway at same time, which will cause serious collision problems. When occurs, no longer receive data, packet needs be retransmitted after certain time. In order solve this problem improve throughput whole system, paper proposes introduce sparse code access (SCMA) 5G non-orthogonal (NOMA) into Wide Area (LoRaWAN) architecture from perspective domain. The theory simulation results show that SCMA can effectively system throughput.