Location-aware downlink and uplink power control and throughput optimization in cellular cognitive radio networks

doi:10.1007/s11460-010-0093-z

Front Elect Electr Eng Chin

2010, Vol. 5

Issue (4) : 441-448 https://doi.org/10.1007/s11460-010-0093-z

RESEARCH ARTICLE

Location-aware downlink and uplink power control and throughput optimization in cellular cognitive radio networks

Zhiyao MA¹, Wei CHEN¹, Zhigang CAO¹(

), Khaled Ben LETAIEF²

1. State Key Laboratory on Microwave and Digital Communications, Tsinghua National Laboratory for Information Science and Technology (TNList), Department of Electronic Engineering, Tsinghua University, Beijing 100084, China; 2. Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong, China

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Abstract

In this paper, we consider throughput maximization in cognitive radio systems with proper power control. In particular, we incorporate location-awareness into the power control design and maximize the average throughput of the cognitive system. As we shall show, the proposed approach effectively utilizes the “spatial opportunity” to maximize the system throughput, which clearly outperforms traditional power control methods. Further, the proposed approach still exhibits significant throughput gain even considering imperfect position information, with appropriate robust design modifications.

Keywords cognitive radios spectrum hole power control localization optimization

Corresponding Author(s): CAO Zhigang,Email:czg-dee@tsinghua.edu.cn

Issue Date: 05 December 2010

Cite this article:

Zhiyao MA,Wei CHEN,Zhigang CAO, et al. Location-aware downlink and uplink power control and throughput optimization in cellular cognitive radio networks[J]. Front Elect Electr Eng Chin, 2010, 5(4): 441-448.

URL:

https://academic.hep.com.cn/fee/EN/10.1007/s11460-010-0093-z
https://academic.hep.com.cn/fee/EN/Y2010/V5/I4/441

Fig.1 Downlink system structure

Fig.2 Uplink system structure

Fig.3 Average spectrum efficiency versus in downlink case corresponding to =2

Fig.4 Average spectrum efficiency versus in uplink case corresponding to =4

Fig.5 Maximum interference radius versus number of channels in downlink case

Fig.6 Maximum interference radius versus number of channels in uplink case

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