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A Heuristic Proportional Fair Scheduling Method for Coexistence of D2D and Cellular Networks

A proportional fair scheduling and cellular network technology, applied in network traffic/resource management, advanced technology, climate sustainability, etc., can solve problems such as ignoring user fairness and large throughput

Active Publication Date: 2019-04-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that most of the current literature regards the maximum throughput as the network resource scheduling target and ignores the fairness between users, and proposes a heuristic proportional fair scheduling method for the coexistence of D2D and cellular networks

Method used

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  • A Heuristic Proportional Fair Scheduling Method for Coexistence of D2D and Cellular Networks
  • A Heuristic Proportional Fair Scheduling Method for Coexistence of D2D and Cellular Networks
  • A Heuristic Proportional Fair Scheduling Method for Coexistence of D2D and Cellular Networks

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specific Embodiment approach 1

[0047] Specific implementation mode one: combine figure 2 A heuristic proportional fair scheduling method for D2D and cellular network coexistence in this embodiment is specifically prepared according to the following steps:

[0048] Step 1. Calculate cellular user i C Channel gain with base station (BS) 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 (BS) interfering link Among them, i D is the i-th D2D user; i C is the i-th cellular user;

[0049] Step 2. Assume that the Gaussian white noise of the channel is In the Tth time slot, when user i D Reuse user i C When , calculate the signal-to-interference ratio of the D2D user in the Tth time slot Instantaneous data rate and the proportional fairness function as follows:

[0050]

[0051]

[0052]

[0053] in, For D2D pair i D The transmit power of the T-th time slot, for cellular us...

specific Embodiment approach 2

[0089] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is:

[0090] Calculated in step one and The specific process is:

[0091] cellular user i C The mathematical expression of the channel gain with the base station (BS) is:

[0092]

[0093] where G is the path loss constant, is the exponentially distributed fast fading from the cellular user to the base station, is the slow fading factor from the cellular user to the base station which obeys the lognormal distribution, α is the path loss factor, is cellular user i C and the distance between the base station; i C is the i-th cellular user; in the mixed network where cellular and D2D users coexist, the instantaneous channel gain of all users is composed of multipath effect, shadow effect and path loss;

[0094] In the same way, the channel gain between D2D pairs is obtained cellular user i C with D2D pair i D Interference channel gain...

specific Embodiment approach 3

[0095] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step three, the average transmission rate of user i in the T time slot is expressed as follows:

[0096]

[0097] Among them, R i,T-1 Indicates the average transmission rate of the i-th user in the first T-1 time slot, r i,T Indicates the instantaneous transmission rate of the i-th user in the T-th time slot; R i,T is a value of the summation and average of the network throughput of user i in T time slots, R i,T It will be updated continuously as the time slot changes. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

A heuristic proportional fair scheduling method for the coexistence of D2D and a cellular network, and the invention relates to a heuristic proportional fair scheduling method. The present invention aims to solve the problem that most of the current literature takes the maximum throughput as the network resource scheduling target and ignores the fairness among users, and proposes a heuristic proportional fair scheduling method for the coexistence of D2D and cellular networks. The method is to first calculate the channel gain; second, calculate the signal-to-dryness ratio, instantaneous data rate and proportional fairness function of the D2D user in the Tth time slot; third, calculate the average transmission rate; fourth, obtain the mathematical model: fifth, use the heuristic The formula proportional fair scheduling algorithm is solved to get P * ; 6. P calculated according to step 5 * Perform multi-user proportional fair scheduling to get X * ; Seven, multi-user mixed network user average transmission rate initialization stage and other steps to achieve. The invention is applied to the field of heuristic proportional fair scheduling.

Description

technical field [0001] The present invention relates to a heuristic proportional fair scheduling method, in particular to a heuristic proportional fair scheduling method for the coexistence of D2D and a cellular network. Background technique [0002] D2D communication is defined as terminal-to-terminal direct communication, which does not need to be forwarded by the base station, and belongs to near-field communication. The short-distance communication makes the D2D communication link have many advantages, such as high data transmission rate, high spectrum utilization and energy efficiency, large cell coverage, low transmission delay, and slowing down the network load. These advantages make the D2D technology develop rapidly, and it is expected to become one of the most potential technologies in the 5G network. In order to improve the spectrum utilization of the cellular network, the D2D users can reuse the spectrum resources of the cellular users. Although the multiplexin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/02H04W72/04H04W72/08H04W72/12
CPCH04W28/0215H04W72/0453H04W72/53H04W72/54H04W72/535Y02D30/70
Inventor 徐玉滨李小帅马琳张文彬刘宁庆王孝
Owner HARBIN INST OF TECH
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