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A power control and channel distribution method based on energy collection in a D2D system

An energy harvesting and power control technology, applied in power management, wireless communication, electrical components, etc., can solve problems such as D2D user interference, D2D user and cellular user layer interference, etc., to reduce power consumption, optimize energy distribution, and The effect of large capacity

Active Publication Date: 2019-05-21
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] However, since D2D communication and traditional cellular communication use the same spectrum resources, there is interlayer interference between D2D users and cellular users. interference

Method used

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  • A power control and channel distribution method based on energy collection in a D2D system
  • A power control and channel distribution method based on energy collection in a D2D system
  • A power control and channel distribution method based on energy collection in a D2D system

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Embodiment Construction

[0035] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention

[0036] Such as figure 2 Shown is the D2D system model based on energy collection in this embodiment, which consists of a base station located in the center of the cell, M cellular users and N D2D user pairs randomly distributed in the cell, and are respectively represented by C={1,2 ,...,i,...,M} and D={1,2,...,j,...,N} represent a cellular user set and a D2D user set, and each pair of D2D users includes a D2D transmission end and a D2D receiving end, each cellular user occupies an orthogonal sub-channel for traditional cellular communication with the base station, each D2D user multiplexes the uplink resource of a cellular user for communication, and the uplink resource of a cellular user can be Multiplexed by multiple D2D users.

[0037] refer to figure 1 , assuming that K D2D users multiplex the channel resources of cellular user i, DR={1,2,...,k,......

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Abstract

The invention discloses a power control and channel allocation method based on energy collection in a 5G D2D system, and the method comprises the steps: firstly, constructing an interference weight graph according to the channel gain ratio of D2D users, and clustering the D2D users according to the interference weight graph so as to minimize the common channel interference of the D2D users in thesame cluster; Secondly, modeling the D2D users in the same cluster as a non-cooperative game, deducing an optimal expression of D2D user transmission power and acquisition time by constructing a Lagrangian function and utilizing a KKT condition, and allocating the optimal transmission power and acquisition time to the D2D users by a joint iterative optimization method; And finally, according to the capacity of each D2D cluster when each cellular user channel resource is multiplexed, using a KM algorithm to distribute channels for the D2D cluster with the purpose of maximizing the total capacity of the D2D users. The limitation of common channel interference and collected energy is considered at the same time, energy distribution is more optimized and reasonable, the minimum signal to interference plus noise ratio requirement of cellular users is considered when power is distributed to the cellular users, and power consumption is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a power control and channel allocation method based on energy collection applied in a D2D system of a fifth-generation mobile communication network. Background technique [0002] As the number of smart mobile terminal devices increases, more users need to access wireless communication networks. However, spectrum resources are limited. How to use the limited spectrum resources to enable more users to perform wireless communication becomes an urgent problem to be solved. Considering that there are more and more services for information sharing between users, and the data traffic generated between users who are geographically close has increased significantly, D2D communication has been proposed as one of the key technologies in the fifth-generation mobile communication network. The communication between users at a distance alleviates the shortage of spect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/24H04W52/38H04W72/04
Inventor 朱琦苏娜
Owner NANJING UNIV OF POSTS & TELECOMM
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