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Power distribution method for D2D user rate maximization in cellular heterogeneous network

A technology for cellular users and heterogeneous networks, applied in the field of power allocation for D2D users

Inactive Publication Date: 2015-09-02
ARMY ENG UNIV OF PLA
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Problems solved by technology

[0004] Technical problem: In view of the shortcomings of the existing cellular user and D2D user interference coordination technology in terms of distributed implementation, algorithm complexity, and D2D user performance, the present invention provides a power allocation that maximizes the rate of D2D users in a cellular heterogeneous network method, which can achieve the goal of optimal D2D user rate under the interference tolerance constraints of cellular users

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  • Power distribution method for D2D user rate maximization in cellular heterogeneous network
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  • Power distribution method for D2D user rate maximization in cellular heterogeneous network

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Embodiment Construction

[0034] The technical solutions of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] Such as figure 1 As shown, the embodiment of the present invention provides a power allocation method for maximizing the rate of D2D users in a cellular heterogeneous network. It is assumed that iteration time slots t=1, 2, ..., T, and T represents the maximum number of iterations. Indicates the transmit power of D2D user i in iteration slot t, Indicates the pricing factor fed back by cellular user m for channel k at iteration time slot t, where i∈N′, N′ represents the set of D2D users, N′={1, 2, ..., N}, N represents the D2D user m∈M′, M′ represents the set of cellular users, M′={1, 2,…, M}, M represents the total number of cellular users; k∈K′, K′ represents the set of channels, K′={ 1, 2, ..., K}, K represents the total number of channels. The method includes the following steps:

[0036] Step 10) perform i...

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Abstract

The invention discloses a power distribution method for D2D user rate maximization in a cellular heterogeneous network. The method comprises the following steps that: step (10), an initialization operation is carried out; step (20), a cellular user detects an interference to generate a pricing factor and the information is broadcasted to each D2D user; step (30), the D2D users determine transmitting powers according to the pricing factor broadcasted by the cellular user, thereby carrying out information transmission; step (40), all D2D users receive the pricing factor expressed by lambda <(t+1)> m,k and determine whether the powers are updated; if a formula that |lambda <(t+1)> m,k - lambda<(t)> m,k| is less than or equal to epsilon is realized for any m,k, the D2D user stop power updating; and if a formula that |lambda <(t+1)> m,k - lambda<(t)> m,k| is larger than epsilon is realized, the step (20) is carried out again until the formula that |lambda <(t+1)> m,k - lambda<(t)> m,k| is less than or equal to epsilon is realized, wherein the epsilon expresses a determination threshold value. With the power distribution method, an objective of user rate maximization can be achieved under the cellular user interference tolerance constraint.

Description

technical field [0001] The present invention relates to a power allocation method for D2D users, in particular to a power allocation method for maximizing the rate of D2D users in a cellular heterogeneous network. Background technique [0002] With the rapid development of communication technology, in order to meet the needs of mobile users for high-speed services, the equipment and equipment (corresponding to English: Device-to-Device; abbreviation: D2D) technology in the key technology of 5G will allow some communication equipment without Direct communication through the base station, that is, data transmission can be performed in a point-to-point manner like the Bluetooth function. As the key technology of the next generation cellular mobile communication system, D2D technology aims to improve the system capacity, allowing cellular users and D2D users to communicate in two forms without interference or with interference. The former has low spectrum efficiency because dif...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/34H04W52/24H04W4/00
CPCH04W4/70H04W52/244H04W52/346
Inventor 蔡跃明段博文郑建超杨文东吴丹
Owner ARMY ENG UNIV OF PLA
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