基于能量效率的雙層非正交多址系統(tǒng)資源優(yōu)化算法
doi: 10.11999/JEIT190048 cstr: 32379.14.JEIT190048
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北京化工大學(xué)信息科學(xué)與技術(shù)學(xué)院 北京 100029
Energy Efficient Based Resource Optimization Algorithm for Two-tier Non-Orthogonal Multiple Access Network
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College of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
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摘要:
該文針對(duì)雙層非正交多址系統(tǒng)(NOMA)中基于能量效率的資源優(yōu)化問(wèn)題，該文提出基于雙邊匹配的子信道匹配方法和基于斯坦科爾伯格(Stackelberg)博弈的功率分配算法。首先將資源優(yōu)化問(wèn)題分解成子信道匹配與功率分配兩個(gè)子問(wèn)題，在功率分配問(wèn)題中，將宏基站與小型基站層視作斯坦科爾伯格博弈中的領(lǐng)導(dǎo)者與追隨者。然后將非凸優(yōu)化問(wèn)題轉(zhuǎn)換成易于求解的方式，分別得到宏基站和小型基站層的功率分配。最后通過(guò)斯坦科爾伯格博弈，得到系統(tǒng)的全局功率分配方案。仿真結(jié)果表明，該資源優(yōu)化算法能有效地提升雙層NOMA系統(tǒng)的能量效率。
Abstract:A subchannel matching method based on bilateral matching and a power allocation algorithm based on Stackelberg game are proposed for two-tier Non-Orthogonal Multiple Access (NOMA) network. Firstly, the resource optimization problem is decomposed into two subproblems—sub-channel matching and power allocation. In the power allocation, the macro base station layer and small base station layer are regarded as the leader and followers in the Stackelberg game. Then, the non-convex optimization problem is converted into a way to be easily solved, and the power allocation of the both layers are obtained respectively. Finally, the global power allocation scheme of the system is obtained by using Stackelberg game. The simulation results show that the proposed resource optimization algorithms can effectively improve the energy efficiency of the two-tier NOMA system.
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Key words:
- Non-Orthogonal Multiple Access (NOMA) /
- Game /
- Energy efficiency /
- Resource allocation
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表 1 不同路徑衰減公式
路徑 公式 宏基站到宏用戶 ${\rm{Pl}}\left( r \right) = 15.3 + 37.6\lg r$ 宏基站到小型基站用戶 ${\rm{Pl}}\left( r \right) = 15.3 + 37.6\lg r + {L_w}$ 小型基站到其用戶 ${\rm{Pl}}\left( r \right) = 38.46 + 20\lg r + 0.7r$ 小型基站到其他
小型基站用戶$\begin{aligned} {\rm{Pl} }\left( r \right) =\,& \max \left( \begin{array}{l} \left( {15.3 + 37.6\lg \left( {r - {R_s} } \right)} \right) \\ \left( {38.46 + 20\lg \left( {r - {R_s} } \right)} \right) \\ \end{array} \right) \\ &+ 0.7{R_s} + 2{L_w} \end{aligned} $ 小型基站到宏用戶 $\begin{aligned} {\rm{Pl} }\left( r \right) =\,& \max \left( \begin{array}{l} \left( {15.3 + 37.6\lg \left( {r - {R_s} } \right)} \right) \\ \left( {38.46 + 20\lg \left( {r - {R_s} } \right)} \right) \\ \end{array} \right) \\ &+ 0.7{R_s} + {L_w} \end{aligned} $ 
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表 2 仿真參數(shù)
參數(shù) 值 宏基站半徑${R_m}$ 500 m 小型基站半徑${R_s}$ 10 m 墻滲透衰減${L_w}$ 10 dB 系統(tǒng)帶寬$B$ 30 MH 載波頻率 2 GHz 對(duì)數(shù)正態(tài)陰影衰落方差 8 dB
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