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CLC number: TP393

On-line Access: 2014-12-23

Received: 2014-04-10

Revision Accepted: 2014-10-28

Crosschecked: 2014-12-12

Cited: 3

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Citations:  Bibtex RefMan EndNote GB/T7714


Jiang LIU


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Frontiers of Information Technology & Electronic Engineering  2015 Vol.16 No.1 P.1-11


Capacity analysis for cognitive heterogeneous networks with ideal/non-ideal sensing

Author(s):  Tao Huang, Ying-lei Teng, Meng-ting Liu, Jiang Liu

Affiliation(s):  State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China

Corresponding email(s):   liujiang@bupt.edu.cn

Key Words:  Cognitive heterogeneous networks, Markov chain, Stochastic geometry, Homogeneous Poisson point process (HPPP)

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Tao Huang, Ying-lei Teng, Meng-ting Liu, Jiang Liu. Capacity analysis for cognitive heterogeneous networks with ideal/non-ideal sensing[J]. Frontiers of Information Technology & Electronic Engineering, 2015, 16(1): 1-11.

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Due to irregular deployment of small base stations (SBSs), the interference in cognitive heterogeneous networks (CHNs) becomes even more complex; in particular, the uncertainty of spectrum mobility aggravates the interference context. In this case, how to analyze system capacity to obtain a closed-form expression becomes a crucial problem. In this paper we employ stochastic methods to formulate the capacity of CHNs and achieve a closed-form expression. By using discrete-time markov chains (DTMCs), the spectrum mobility with respect to the arrival and departure of macro base station (MBS) users is modeled. Then an integral method is proposed to derive the interference based on stochastic geometry (SG). Also, the effect of sensing accuracy on network capacity is discussed by concerning false-alarm and miss-detection events. Simulation results are illustrated to show that the proposed capacity analysis method for CHNs can approximate the conventional sum methods without rigorous requirement for channel station information (CSI). Therefore, it turns out to be a feasible and efficient way to capture the network capacity in CHNs.

This paper employs the divide-and-conquer strategy, deriving the spectrum usage opportunity by the DTMC, and managing to approximate the aggregated interference by an integral method. The idea of the application of stochastic geometry in HetNet is timely and interesting.




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