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A method of minimizing downlink transmission delay based on noma-mec system

A transmission delay and minimization technology, applied in the field of communication, can solve problems such as delay and energy efficiency imbalance, and achieve the effect of solving transmission delay and system energy consumption imbalance, strong scalability, and low complexity

Active Publication Date: 2022-07-12
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] Purpose of the invention: The present invention aims at the problem of unbalanced delay and energy efficiency in the downlink transmission process of the existing NOMA-MEC system in a multi-user scenario, and proposes a method for minimizing the downlink transmission delay based on the NOMA-MEC system. Under the common constraints of computing tasks, power and energy consumption, the transmission delay of the system can be minimized

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  • A method of minimizing downlink transmission delay based on noma-mec system

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[0031] The present invention will be further described below with reference to the embodiments and the accompanying drawings, but the implementation of the present invention is not limited thereto.

[0032] Step 1: Build a system model. The communication system targeted by the present invention has a base station equipped with a mobile edge computing server and K mobile users, wherein both the base station and the users are equipped with a single antenna for information transmission and reception. When the user unloads the computing task and downloads the computing result from the MEC server, the NOMA method is used for transmission. In the downlink transmission of the system, the base station needs to transmit the calculation result of the user into the user equipment. Here, the calculation result of the task to be transmitted by the kth user is denoted as I k , k∈{1,…,K}. Meanwhile, the corresponding transmission power is denoted as p k , k∈{1,…,K}. Then, the expression...

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Abstract

The invention discloses a method for minimizing downlink transmission delay based on the NOMA-MEC system. First, a system model of a base station equipped with a mobile edge computing server and K mobile users is constructed, wherein the base station and users are equipped with a single antenna for Signal transmission and reception; according to the transmission characteristics of the downlink NOMA and the characteristics of the MEC system, the user's signal-to-noise ratio, transmission bit constraints, power constraints and energy consumption constraints are derived; then, the mathematics for the purpose of minimizing the system delay is constructed. model; finally, an optimization algorithm is designed to obtain the optimal resource allocation scheme aiming at minimizing the delay. The invention solves the problem of unbalanced delay and energy efficiency in the downlink transmission process of the existing NOMA-MEC system in the multi-user scenario, and can reduce the transmission delay of the system under the common constraints of computing tasks, power and energy consumption. to a minimum.

Description

technical field [0001] The present invention belongs to the technical field of communication, and more specifically, relates to a method for minimizing downlink transmission delay based on NOMA-MEC system. Background technique [0002] At present, with the rapid growth of communication data volume and the increasing demands of users for high-quality experience, mobile communication networks are facing huge challenges. The emergence of mobile edge computing (MEC) technology has effectively alleviated this pressure. As one of the important technologies of the fifth-generation mobile communication system, MEC enables mobile users to offload their computing-intensive tasks to the MEC platform by deploying a service platform with communication, computing and storage functions to the network edge, and the MEC server performs the tasks. calculate. Compared with user equipment, MEC servers have higher computing power and can quickly process a large amount of task data, thus greatly...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/02H04W28/18
CPCH04W24/02H04W28/18Y02D30/70
Inventor 王保云李想
Owner NANJING UNIV OF POSTS & TELECOMM
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