Multi-carrier-based efficient competition consensus method under scene of Internet of Things

Abstract

The invention provides a multi-carrier-based efficient competition consensus method under the scene of Internet of Things, which comprises the following steps of: establishing a distributed competition multi-subcarrier FDC protocol, randomly selecting one or more subcarriers for competition by each node in a wireless distributed competition process, and excluding a subset relationship through a multi-subcarrier FDC protocol, so that all nodes achieve a global consensus, and competition time consumption is reduced by utilizing wireless broadcast characteristics. According to the invention, all the nodes can reach the consensus by excluding the subset relationship, and the competition time consumption is reduced by utilizing the wireless broadcast characteristics, so that the global consensus is achieved, and the arbitration time is reduced.

Description

technical field [0001] The present invention relates to the technical field of the Internet of Things, in particular to an efficient competition consensus method based on multi-carriers under the Internet of Things scenario. Background technique [0002] The Internet of Things (IoT) has recently received a lot of attention in both academia and industry, and is expected to have a fundamental impact on our daily lives. In a typical IoT scenario, a large number of IoT nodes usually adopt a wireless distributed contention protocol for data transmission. Therefore, how to design an efficient and extremely low-conflict wireless protocol is very important. As is well known, in a classic time-to-frequency (T2F) protocol, each node competes by sending a signal on a subcarrier randomly selected by it. T2F reduces the time consumption of traditional time-domain contention, but it causes many contention collisions (ie, multiple nodes select the same subcarrier) when the number of node...

AI Technical Summary

Problems solved by technology

[0004] IEEE 802.11 WLAN throughput inefficiencies based on conventional time-domain contention, e.g., throughput efficiency (i.e., time-scale) for sending a MAC payload of 1500 bytes although the physical layer (PHY) data rate has increased from 1Mbps to 1Gbps has been reduced from 80% to less than 10%; meanwhile, for a network with 30 nodes, the temporal contention overhead has increased from less than 15% to more than 50%

WiFi-BA effectively reduces the possibility of Type-1 conflicts, but introduces Type-2 conflicts because it does not consider the complex relationship between subcarrier selection

Images