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D2D cooperative transmission method of minimizing system power consumption

A technology of cooperative transmission and system power consumption, which is applied in the field of mobile communication and D2D communication to achieve the effect of improving reliability, reducing power consumption, and transmitting power.

Inactive Publication Date: 2016-11-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention proposes a D2D cooperative transmission scheme based on superposition coding in the uplink of macro cells, and designs a joint resource allocation scheme based on superposition coding, which solves the problem that multiple users use superposition coding at the same time. Coding Cooperative Transmission Problems

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  • D2D cooperative transmission method of minimizing system power consumption
  • D2D cooperative transmission method of minimizing system power consumption
  • D2D cooperative transmission method of minimizing system power consumption

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Embodiment Construction

[0028] The technical solution of the present invention will be described in detail below in conjunction with examples and accompanying drawings.

[0029] Such as figure 1 As shown, the system according to the following joint channel allocation strategy,

[0030]

[0031]

[0032] x ij ∈{0,1};

[0033]

[0034]

[0035] A pair of D2D users and macro cell user CUs that share channel resources are obtained, and then the pair of D2D users and CUs determine their respective transmit power or power allocation factors according to the cooperation strategy sent by the base station.

[0036] specifically:

[0037] 1) If the cooperative transmission strategy is adopted, the respective transmit power and superposition coding power allocation factors are:

[0038]

[0039]

[0040] The steps to determine the allocation factor are as follows:

[0041] i. If

[0042] ●When δ≥0, then α=max(β 1 ,0)

[0043] ●When δ<0, then α=0

[0044] ii. If

[0045] ●When δ>0...

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Abstract

The invention belongs to the mobile communication field, especially relates to the D2D communication field of the mobile communication. In order to solve the defects of the prior art, a D2D cooperative transmission method of minimizing system power consumption is provided, and a problem that a plurality of users use superposition coding for cooperative transmission at the same time is solved. A closed-form solution of optimal transmission power of D2D users and macrocell users is provided, and a concrete method of a multi-user macrocell system of how to realize unified channel resource allocation is provided. Under a condition of guaranteeing the QoS of the D2D users and the macrocell users at the same time, by adopting the cooperative transmission strategy based on the superposition coding and the multi-channel user unified channel resource allocation strategy, the total emission power of the system is minimized, and by adopting a simulation result, the method provided by the invention is capable of greatly reducing the power consumption of the system by comparing with conventional methods, and at the same time, interruption probability during a communication process is reduced, and reliability of a communication link is improved.

Description

technical field [0001] The invention belongs to the field of mobile communication, in particular to the field of D2D communication in mobile communication. Background technique [0002] With the development of the mobile Internet and the Internet of Things, mobile data traffic will show explosive growth in the future, and the total number of devices connected to the global mobile communication network will reach a scale of 100 billion. For this reason, the fifth generation mobile communication (5G) system came into being. The key performance indicators of the 5G system include: user experience rate, connection density, end-to-end delay, traffic density, mobility, and user peak rate, etc. In addition, spectrum efficiency, energy consumption and cost constitute the three major efficiency indicators, which are key factors for the sustainable development of mobile communication networks. [0003] Analysis and research on Internet services show that the localization characteris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/02H04W52/02H04W72/04H04W72/12
CPCH04W28/0221H04W52/0219H04W72/0446H04W72/0473H04W72/1215Y02D30/70
Inventor 欧振威谭夏宁赵国栋李立英
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA