Symbiotic radio network design method based on non-orthogonal multiple access technology

Abstract

The invention belongs to the technical field of wireless communication, and particularly relates to a symbiotic radio network design method based on a non-orthogonal multiple access technology. The method comprises the following steps: firstly, the energy of all BD emission signals is estimated, and then cluster division is carried out on the BD by adopting a high-energy priority matching criterion; during data transmission, NOMA is adopted in a cluster, that is, all BDs in the cluster can perform data transmission in corresponding time slots at the same time, and TDMA is adopted between different clusters, that is, only one cluster is allowed to work in each time slot; besides, an energy absorption mode based on cluster mutual assistance energy supply is provided, that is, for BDs in other clusters, energy can be absorbed from a main signal transmitted by a base station and can also be absorbed from a signal reflected by the cluster which is currently transmitted. The method has the advantages that on the premise that low power consumption and high spectrum utilization rate are guaranteed, the system performance is improved to a certain extent compared with that of a communication system adopting a traditional transmission protocol.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a design method of a symbiotic radio network (SRN) based on non-orthogonal multiple access (NOMA). Background technique [0002] In recent years, with the explosive growth of data in the information age, the Internet of Things (IoT) industry has been greatly developed, and the use of large-scale Internet of Things has become more and more frequent. In the large-scale Internet of Things, there are new and higher requirements for precious resources such as energy and spectrum. However, traditional wireless communication networks generally have problems such as insufficient energy supply and low spectrum utilization, which slows down the development of the Internet of Things industry to a certain extent, making the development of the Internet of Things industry encounter unprecedented bottlenecks. Therefore, it is imminent to introduce technologies with l...

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Problems solved by technology

[0004] Aiming at the problems of insufficient energy supply and low spectrum utilization in the existing Internet of Things, the present invention combines SR and NOMA technologies to design a symbiotic radio communication network based on non-orthogonal multiple access technology, and considers the transmission power of the base station (transmit power), BD energy reflection coefficients (power reflection coefficients) and transmission time slot length (time slot duration) to optimize the overall system performance

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