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Joint optimization method based on channel allocation and power control of FD-D2D

A technology of power control and channel allocation, which is applied in the field of joint optimization of FD-D2D based on channel allocation and power control, can solve problems such as not considering OFDM, difficult problems, etc.

Active Publication Date: 2018-09-28
XI AN JIAOTONG UNIV
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Problems solved by technology

In fact, channel allocation and power control are coupled with each other, and channel allocation is a combinatorial optimization problem, it is difficult to solve the optimal solution of the above problems by classical methods
[0005] At present, the current technical solution has the following disadvantages: In the current FD-D2D communication research, the SINR model in most applications today only targets the power control and channel resource allocation of a single pair of FD-D2D users, and does not consider orthogonal frequency division The impact of multiple pairs of FD-D2D users on cellular users in OFDM (orthogonal frequency division multiplexing) systems and the issue of channel resource allocation

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  • Joint optimization method based on channel allocation and power control of FD-D2D
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  • Joint optimization method based on channel allocation and power control of FD-D2D

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Embodiment Construction

[0090] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0091] Such as figure 1 As shown, the FD-D2D of the present invention is based on the joint optimization method of channel allocation and power control, including the following steps:

[0092] (1) randomly distributed in the cell cellular users and For FD-D2D users, all users are relatively static. FD-D2D users can communicate by multiplexing the uplink channel resources of cellular users. The two users of FD-D2D are denoted as d 1 and d 2 . The total system bandwidth in the cell is W, then the communication bandwidth of each user is The i-th pair of FD-D2D users d 1 、d 2 and the signal-to-noise ratios of cellular user j are:

[0093]

[0094]

[0095]

[0096] The symbols in formulas (1)-(3) have the following meanings: λ i,j ∈0,1: Indicates whether the FD-D2D pair reuses the channel resources of cellular users. When the i-th ...

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Abstract

The invention discloses a joint optimization method based on channel allocation and power control of FD-D2D. Firstly, channel allocation is performed based on a channel gain from an FD-D2D user to a cellular user, and a non-convex problem to be solved is transformed into a convex optimization problem through a series of transformations on the basis so as to obtain the optimal transmitting power ofthe FD-D2D user. In view of the interference management problem in the direct communication of a full-duplex device, the interference management problem is modeled as a problem of maximizing the total throughput of the FD-D2D user under the condition of meeting the signal to noise ratio requirements of the cellular user. By adoption of the joint optimization method disclosed by the invention, thetransmission rate of the FD-D2D user can be effectively improved on the premise of ensuring the performance of the cellular user.

Description

technical field [0001] The invention belongs to the technical field of 5G wireless communication, and in particular relates to an FD-D2D joint optimization method based on channel allocation and power control. Background technique [0002] With the continuous emergence of local area applications and smart terminals, short-distance mobile data services are rapidly increasing, and FD-D2D technology has been widely discussed and studied. An important feature of FD-D2D communication is that FD-D2D user data is directly transmitted between FD-D2D user terminals without being forwarded by the base station, which can not only improve spectrum utilization, but also reduce terminal energy consumption. [0003] Full-duplex device-to-device (FD-D2D, full duplex device-to-device) communication transmission technology has become one of the indispensable technologies for next-generation wireless communication. [0004] In order to reduce the interference between cellular users and FD-D2D...

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Application Information

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IPC IPC(8): H04W4/70H04W52/24H04W72/08H04L5/14
CPCH04L5/14H04W4/70H04W52/243H04W72/541
Inventor 曲桦王璐赵季红任塨晔
Owner XI AN JIAOTONG UNIV
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