D2D網(wǎng)絡(luò)中信道選擇與功率控制策略研究

錢志鴻; 田春生; 王鑫; 王雪

doi:10.11999/JEIT190149

D2D網(wǎng)絡(luò)中信道選擇與功率控制策略研究

doi: 10.11999/JEIT190149

錢志鴻¹,
田春生¹,
王鑫^{1, 2},
王雪^1, ,

1.
吉林大學(xué)通信工程學(xué)院長(zhǎng)春 130012
2.
吉林農(nóng)業(yè)大學(xué)信息技術(shù)學(xué)院 ??長(zhǎng)春 ??130018

基金項(xiàng)目: 國(guó)家自然科學(xué)基金(61771219)，吉林大學(xué)基礎(chǔ)科研項(xiàng)目(SXGJQY2017-9, 2017TD-19)，吉林大學(xué)研究生創(chuàng)新基金(101832018C022)

詳細(xì)信息

作者簡(jiǎn)介:
錢志鴻：男，1957年生，教授，研究方向?yàn)闊o線網(wǎng)絡(luò)通信技術(shù)，包括藍(lán)牙、RFID, M2M, D2D、無線傳感器網(wǎng)絡(luò)及物聯(lián)網(wǎng)等

田春生：男，1993年生，博士生，研究方向?yàn)镈2D通信技術(shù)與物聯(lián)網(wǎng)

王鑫：女，1982年生，博士生，研究方向?yàn)镈2D通信技術(shù)

王雪：女，1984年生，副教授，研究方向?yàn)镈2D通信技術(shù)與物聯(lián)網(wǎng)

通訊作者:
王雪　jluwangxue@163.com

中圖分類號(hào): TN929.5
計(jì)量
- 文章訪問數(shù): 2589
- HTML全文瀏覽量: 1309
- PDF下載量: 153
- 被引次數(shù): 0
出版歷程
- 收稿日期: 2019-03-14
- 修回日期: 2019-05-23
- 網(wǎng)絡(luò)出版日期: 2019-05-28
- 刊出日期: 2019-10-01

Research on Channel Selection and Power Control Strategy for D2D Networks

Zhihong QIAN¹,
Chunsheng TIAN¹,
Xin WANG^{1, 2},
Xue WANG^{1
, ,}

1.
College of Communication Engineering, Jilin University, Changchun 130012, China
2.
College of Information & Technology, Jilin Agricultural University, Changchun 130018, China

Funds: The National Natural Science Foundation of China (61771219), The Fundamental Research of Jilin University (SXGJQY2017-9, 2017TD-19), The Graduate Innovation Fund of Jilin University (101832018C022)

摘要

摘要: 針對(duì)D2D通信的資源分配問題，該文研究了D2D信道選擇與功率控制策略。在保證蜂窩用戶服務(wù)質(zhì)量(QoS)的前提下，提出一種基于啟發(fā)式的D2D信道選擇算法，為系統(tǒng)內(nèi)的D2D用戶找到合適的信道復(fù)用資源。同時(shí)，利用拉格朗日對(duì)偶方法求解得到D2D用戶最優(yōu)傳輸功率。仿真結(jié)果表明當(dāng)蜂窩用戶與多對(duì)D2D用戶共享信道資源時(shí)能夠大幅度提升系統(tǒng)平均吞吐量。在相同條件下，該算法的性能要明顯優(yōu)于現(xiàn)有算法。
- D2D通信 /
- 信道選擇 /
- 功率控制 /
- 拉格朗日對(duì)偶
Abstract: Considering the resource allocation problem for Device-to-Device (D2D) communications, a channel selection and power control strategy for D2D communications is investigated. On the premise of guaranteeing the Quality of Service (QoS) of cellular users, a heuristic based D2D channel selection algorithm is proposed to find the suitable channel reusing resources for D2D users in the system. At the same time, the optimal transmission power of D2D users is obtained by using the Lagrange dual method. Simulation results demonstrate that when the cellular user shares channel resources with multiple pairs of D2D users, the system throughput can be dramatically improved. The performance of this algorithm outperforms the exiting algorithms under the same conditions.
- D2D communications /
- Channel selection /
- Power control /
- Lagrange dual

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圖 1 系統(tǒng)模型

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圖 2 系統(tǒng)平均吞吐量的累積分布函數(shù)

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圖 3 DUEs最大傳輸功率對(duì)系統(tǒng)平均吞吐量的影響

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圖 4 DUEs間通信距離對(duì)平均吞吐量的影響

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圖 5 系統(tǒng)內(nèi)DUEs數(shù)量對(duì)DUEs接入概率的影響

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表 1 基于啟發(fā)式思想的DUEs信道選擇算法

(1)初始化：${D_i} = \varnothing ,\forall i \in C$; ${M_i} = D,\forall i \in C$; $\xi _i^j = 0,\forall i \in C,\forall j \in D$；利用式(11)得到所有DUEs 最優(yōu)的發(fā)射功率$P_{j,i}^{{\rmq7j3ldu95} {\rm{opt}}}$，并求解出與之相對(duì) 應(yīng)的$T(P_{j,i}^{{\rmq7j3ldu95} {\rm{opt}}})$值；
(2) repeat
(3)　$({i^ * },{j^}) = \mathop {\arg \max }\limits_{(i,j):i \in C,j \in {M_i}} T\;(P_{j,i}^{{\rmq7j3ldu95} {\rm{opt}}})$ // 求解得到吞吐量最大值所對(duì)應(yīng)的CUE${i^ }$與DUE${j^}$；　(4)　if $\left[ {{{{P^{\rm{c}}}g_{{i^}}^{\rm{c}}} \Biggr/ {\left( {\sigma _0^2 + \sum\limits_{q \in \left\{ {{D_{{i^}}} \cup {j^}} \right\}} {P_{q,{i^}}^{{\rmq7j3ldu95} {\rm{opt}}}g_{q,{i^}}^{\rmq7j3ldu95}} } \right)}}} \right] \ge {\gamma _{{\rm{th}}}}$ then // 判斷DUE${j^}$復(fù)用CUE${i^ }$信道資源時(shí)，CUE${i^ * }$的SINR是否滿足系統(tǒng)限制條件，當(dāng)滿足限制條件時(shí)：
(5)　　set $\xi _{{i^}}^{{j^}} = 1$; // 將復(fù)用指示因子$\xi _{{i^}}^{{j^}}$的值設(shè)置為1；
(6)　　　${M_i} = {M_i}\backslash \left\{ {{j^}} \right\},\forall i \in C$;${D_{{i^}}} = {D_{{i^}}} \cup \left\{ {{j^}} \right\}$; // 將DUE${j^}$從集合${M_i}$中刪除, 同時(shí)將DUE${j^}$加入到復(fù)用CUE${i^ * }$ 信道資源的DUEs集合 ${D_{{i^*}}}$中；
(7)　else // 當(dāng)不滿足限制條件時(shí):
(8)　　　${M_{{i^}}} = {M_{{i^}}}\backslash \left\{ {{j^}} \right\}$; // 將DUE${j^}$從集合${M_{{i^*}}}$中刪除；
(9)　end if
(10) until ${M_i} = \varnothing ,\forall i \in C$ // 當(dāng)集合${M_i}$為空集時(shí)停止運(yùn)行；
(11) return ${D_i},\forall i \in C$; $\xi _i^j,\forall i \in C,\forall j \in D$. // 輸出集合${D_i}$及復(fù)用指示因子$\xi _i^j$的值。

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表 2 DUEs功率控制算法

(1) 根據(jù)表1對(duì)集合${D_i},\forall i \in C$進(jìn)行初始化；
(2) for all $i \in C$ do
(3)　for all $j \in {D_i}$ do
(4)　　根據(jù)式(21)—式(23)計(jì)算DUE j傳輸功率$P_{j,i}^{\rmq7j3ldu95}$。
(5)　end for
(6) end for
(7) return $P_{j,i}^d,\forall i \in C,\forall j \in D$. // 輸出DUEs最優(yōu)傳輸功率。

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表 3 仿真參數(shù)

參數(shù)	數(shù)值
CUEs數(shù)量	30, 40
DUEs數(shù)量	25～60
DUEs間通信距離	30～100 (m)
CUEs通信路徑損耗	128.1+37.6lg(d(km))
DUEs通信路徑損耗	148+40lg(d(km))
噪聲譜密度	–114 dBm/Hz
DUEs最小吞吐量限制	1.5 Mbps
CUEs傳輸功率	24 dBm

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