業(yè)務(wù)感知的自適應(yīng)協(xié)作頻譜感知算法

邱恭安; 章國(guó)安

doi:10.11999/JEIT160582

業(yè)務(wù)感知的自適應(yīng)協(xié)作頻譜感知算法

doi: 10.11999/JEIT160582 cstr: 32379.14.JEIT160582

邱恭安¹,
章國(guó)安¹

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(61371113, 61601248)

計(jì)量
- 文章訪問(wèn)數(shù): 1544
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2016-06-03
- 修回日期: 2016-11-22
- 刊出日期: 2017-04-19

Service Awareness Based Adaptive Cooperative Spectrum Sensing Algorithm

QIU Gongan¹,
ZHANG Guoan¹

Funds:

The National Natural Science Foundation of China (61371113, 61601248)

摘要

摘要: 為提高次用戶接入業(yè)務(wù)端到端傳輸性能，該文提出通過(guò)感知節(jié)點(diǎn)檢測(cè)性能和業(yè)務(wù)類型的頻譜檢測(cè)與資源分配聯(lián)合優(yōu)化方法。首先，將上周期全局檢測(cè)性能構(gòu)造的有效檢測(cè)指數(shù)作為調(diào)節(jié)權(quán)值，計(jì)算信道狀態(tài)自適應(yīng)協(xié)作門限，據(jù)此選擇協(xié)作模式，以最大化有效檢測(cè)區(qū)間，并根據(jù)頻帶穩(wěn)定性和有效性特征構(gòu)造可用頻譜空間。隨后，基于業(yè)務(wù)請(qǐng)求接入速率將接入業(yè)務(wù)分為時(shí)延敏感業(yè)務(wù)和可靠性敏感業(yè)務(wù)兩類，通過(guò)業(yè)務(wù)屬性匹配的頻譜分配算法提高接入業(yè)務(wù)的端到端傳輸成功率。仿真顯示，在不同信道狀態(tài)下，所提算法通過(guò)自適應(yīng)調(diào)整全局檢測(cè)性能擴(kuò)大了Rayleigh衰落信道的有效頻譜檢測(cè)區(qū)間，降低了時(shí)延敏感業(yè)務(wù)的中斷概率。
- 頻譜檢測(cè) /
- 頻譜分配 /
- 自適應(yīng)協(xié)作 /
- 業(yè)務(wù)感知
Abstract: Joint optimization of cooperative spectrum detection and resource allocation based on the service profile is investigated to enhance end-to-end transmission performance of the secondary users by selecting the sensing nodes. At first, the adaptive cooperation thresholds are adjusted according to the weight of available detection index based on the global detection metrics in the last round. And the optimal cooperative mode can be selected to maximize the available sensing region. The idle channels are managed depend on the stability and the available bandwidth metrics for different secondary users. Then, the secondary users can be divided into two categories based on the requested rates, delay sensitive services and reliability sensitive services. The idle channels for the secondary users with different quality of service demands are selected depend on the service profile for enhancing end-to-end transmission performance. Simulation results show that the proposed algorithm can expand the available sensing region through adjusting the global detection metrics adaptively in Rayleigh fading channel and increase the resource utility by decreasing the outage of delay sensitive services.
- Spectrum detection /
- Spectrum allocation /
- Adaptive cooperation /
- Service awareness

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參考文獻(xiàn)(20)

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