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D2D (Device to Device) communication joint mode selection and proportional fairness scheduling optimization method

A proportional fair scheduling and optimization method technology, applied in multiplexing communication, electrical components, orthogonal multiplexing systems, etc., can solve problems such as ignoring user fairness, D2D communication mode selection, or single optimization of resource scheduling

Active Publication Date: 2017-10-13
黑龙江省工研院资产经营管理有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that most of the current literature is limited to the single optimization problem of D2D communication mode selection or resource scheduling, and the research of most of the literature is focused on taking the maximum throughput as the network resource scheduling goal and ignoring the fairness between users In order to solve this problem, a joint mode selection and proportional fair scheduling optimization method for D2D communication is proposed

Method used

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  • D2D (Device to Device) communication joint mode selection and proportional fairness scheduling optimization method
  • D2D (Device to Device) communication joint mode selection and proportional fairness scheduling optimization method
  • D2D (Device to Device) communication joint mode selection and proportional fairness scheduling optimization method

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specific Embodiment approach 1

[0071] Specific implementation mode one: combine figure 2 Describe this embodiment, a D2D communication joint mode selection and proportional fair scheduling optimization method in this embodiment, which is characterized in that the method is specifically carried out according to the following steps:

[0072] Step 1: Algorithm starts;

[0073] Step 2: Initialize the average transmission rate of all users in the first time slot:

[0074] Randomly generate a set of average transmission rates of cellular users D2D user average transmission rate set

[0075] in, is the average transmission rate of cellular user 1 in the first time slot, is the average transmission rate of cellular user 2 in the first time slot, for cellular user N C The average transmission rate in the first time slot; is the average transmission rate of D2D user 1 in the first time slot, is the average transmission rate of cellular user 2 in the first time slot, For D2D user N D The average trans...

specific Embodiment approach 2

[0128] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the tth time slot is calculated in the step four, cellular user i C Channel Gain with Base Station Channel gain between D2D pairs cellular user i C with D2D pair i D Interference channel gain between receivers and D2D for i D Channel gain to base station interfering link The specific process is:

[0129] The network system model in which D2D communication multiplexes cellular user uplink resources in the hybrid network of D2D and cellular network in step 4 includes a base station 1, N C cellular users 2 and N D D2D senders 3 and N D A D2D receiving terminal 4, the terminal user can be a traditional mobile phone user 5 or a vehicle user 6, and the D2D terminal can choose a dedicated mode communication 7, or a multiplex mode communication 8 (such as figure 1 );

[0130] In the mixed network model of D2D and cellular network, all cellular user CUs and D2D sending ...

specific Embodiment approach 3

[0143] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 6, according to Step 5, the joint mode selection of the mixed network model of D2D and the cellular network and the proportional fairness control problem are mathematically modeled, Get the mathematical model; the specific process is:

[0144] The mathematical model is obtained by taking the maximum sum of the proportional fairness functions of all users in the tth time slot as the objective function:

[0145]

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[0150]

[0151]

[0152]

[0153]

[0154] where x * is the optimal solution of the corresponding mode selection and channel allocation matrix x when formula (17) reaches the maximum value, p * is the optimal solution of the power matrix corresponding to p when formula (17) reaches the maximum value; N C is the number of cellular users, and the value is a positive integer; N D is the number of D2D pairs, and...

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Abstract

The invention relates to a D2D (Device to Device) communication joint mode selection and proportional fairness resource scheduling optimization method. The invention aims to solve problems that most of the current literature is limited to the research for a single optimization problem of D2D communication mode selection or resource scheduling, and that the related research focuses on taking the maximum throughput as a resource scheduling objective and ignores the fairness between subscribers. The specific process comprises the steps of firstly calculating the channel gain; secondly, respectively calculating the signal to interference plus noise ratio, the instantaneous data rate, a proportional fairness function and the average transmission rate of each D2D subscriber and each cellular subscriber in a t-th time slot under a dedicated mode and a multiplexing mode; thirdly, acquiring a mathematical model for joint mode selection and proportional fairness scheduling; fourthly, solving an optimal control matrix p* by using an optical power control algorithm; and fifthly, performing D2D subscriber communication mode selection and resource scheduling under the multiplexing mode according to the optimal control matrix p*. The D2D communication joint mode selection and proportional fairness scheduling optimization method is applied to the field of D2D communication interference suppression.

Description

technical field [0001] The present invention relates to the field of Device to Device (D2D) communication interference suppression, in particular to a D2D communication joint mode selection and proportional fair resource scheduling optimization method. Background technique [0002] As an emerging technology, D2D communication has high spectrum utilization and energy efficiency. D2D communication provides an effective solution to the future 5G network's demand for high data traffic. D2D communication belongs to short-distance direct communication, which enables direct communication between end users without forwarding by the base station. D2D communication in cellular network is the focus of scholars' research. This is because the cellular network resources can be centrally managed by the base station. This method can not only reduce the computational complexity of the user terminal, but also suppress and reduce the interference between the terminals through the overall ma...

Claims

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Application Information

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IPC IPC(8): H04J11/00
CPCH04J11/0026
Inventor 马琳李小帅何晨光徐玉滨
Owner 黑龙江省工研院资产经营管理有限公司
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