A method and system for power allocation of a collaborative network coding system based on Internet of Vehicles

Abstract

The invention discloses a method and system for power distribution of a collaborative network coding system based on the Internet of Vehicles. This method calculates the interruption probability of the system by building a two-way communication relay system model for mobile vehicles, analyzes the relationship between distance, speed and communication time and the interruption probability, determines the maximum value of all minimum interruption probabilities at each moment in the communication process, and calculates the best Power allocation factor, when the total transmission power of the two vehicles is constant, calculate the optimal value of the transmission power of the two vehicles according to the optimal power allocation factor, and forward the optimal value to the corresponding mobile vehicle node, and then obtain the optimal power allocation scheme. By adopting the present invention, better system interruption performance can be obtained, and the gap existing in the optimal power distribution of the vehicle network based on mobile nodes under centralized cooperation can be made up.

Description

technical field [0001] The invention relates to the field of two-way communication of mobile vehicles, in particular to a power distribution method and system of a cooperative network coding system of the Internet of Vehicles. Background technique [0002] Cooperative diversity technology is a kind of MIMO technology, which realizes transmit or receive diversity by sharing a virtual multi-antenna array formed by each single-antenna user. Cooperative diversity technology was first proposed by Laneman and Wornell. In recent years, the research focus in this direction has mostly focused on power allocation in cooperation. For example, based on the Amplify-and-Forward protocol existing in the prior art, assuming that each cooperative node is fixed and the channels are orthogonal to each other, and aiming at minimizing the outage probability, an optimal power allocation scheme in this case is given. Moreover, an optimal power allocation scheme of cooperative relay system under t...

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Problems solved by technology

[0003] It can be seen from this that although there are many existing studies in this field, most of their topics are limited to the power allocation of fixed nodes in centralized cooperation. How to achieve the optimal power allocation for mobile sending and receiving signal nodes in centralized cooperation? Allocation, there is still a gap in the current existing technology

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