OFDMA毫微微小區(qū)雙層網(wǎng)絡(luò)中基于分組的資源分配

張海波; 穆立雄; 陳善學(xué); 彭焦陽

doi:10.11999/JEIT150699

OFDMA毫微微小區(qū)雙層網(wǎng)絡(luò)中基于分組的資源分配

doi: 10.11999/JEIT150699

2.
(重慶郵電大學(xué)重慶市移動通信重點實驗室重慶 400065) ②(北卡羅來納州立大學(xué)電子與計算機工程系美國北卡羅來納州 27695)

基金項目:

國家青年自然科學(xué)基金(61301122)，重慶市科委項目(cstc2014jcyjA40052)，重慶市教委項目(KJ1400405)

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- 文章訪問數(shù): 1570
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2015-06-08
- 修回日期: 2015-10-19
- 刊出日期: 2016-02-19

A Cluster-based Resource Allocation in a Two-tier OFDMA Femtocell Networks

2.
(Chongqing Key Laboratory of Mobile Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China)

Funds:

The National Natural Science Foundation of China (61301122), The Research Plan of Chongqing (cstc2014jcyjA 40052), The Research Program of Chongqing Municipal Education Commission (KJ1400405)

摘要

摘要: 毫微微小區(qū)(Femtocell)網(wǎng)絡(luò)能夠增強室內(nèi)覆蓋，提高系統(tǒng)容量，但是在頻譜共享的正交頻分多址(OFDMA)毫微微小區(qū)網(wǎng)絡(luò)中，毫微微小區(qū)之間的同層干擾以及毫微微小區(qū)與宏小區(qū)(Macrocell)之間的跨層干擾嚴(yán)重限制了系統(tǒng)的性能。針對這兩種干擾，該文提出一種基于分組的資源分配算法。該算法包括兩部分：一部分是宏基站先利用改進(jìn)的匈牙利算法為宏小區(qū)用戶分配信道，再用注水算法分配功率，保證宏小區(qū)用戶的正常傳輸；另一部分是在避免干擾宏小區(qū)用戶的基礎(chǔ)上，先采用模擬退火算法對毫微微小區(qū)進(jìn)行分組，再進(jìn)行信道和功率分配，滿足毫微微小區(qū)用戶的數(shù)據(jù)速率需求，最大化頻譜效率。仿真結(jié)果表明，該算法有效地抑制了這兩種干擾，既能保證用戶的數(shù)據(jù)速率需求，又能有效提升網(wǎng)絡(luò)頻譜效率。
- 無線通信 /
- 毫微微小區(qū)網(wǎng)絡(luò) /
- 資源分配 /
- 分組 /
- 正交頻分多址
Abstract: Femtocell is a promising technology to enhance indoor coverage and system capacity. However, the co-tier and cross-tier interference impair greatly the network performance for spectrum-sharing OFDMA femtocell networks. To mitigate the co-tier/cross-tier interference, a cluster-based resource allocation algorithm is proposed. The proposed algorithm consists of two parts: In the first part, an improved Hungarian algorithm is first adopted to assign sub-channels to the Macro Users Equipments (MUEs). Then the averagely assigned power is reallocated in linear water-filling fashion in order to ensure the transmission of MUEs. In the other part, Simulated Annealing algorithm is first used to cluster femtocells into disjoint groups. Then under the condition of avoiding causing interference to MUEs, femtocells perform sub-channel and power allocation according to the rate requirements of Femtocell User Equipments (FUEs) to maximize spectrum efficiency. Simulation results show that the proposed algorithm not only guarantees the data rate requirements of users, but also improves the spectrum efficiency.
- Wireless communication /
- Femtocell networks /
- Resource allocation /
- Cluster /
- OFDMA

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參考文獻(xiàn)(19)

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