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http://dx.doi.org/10.7840/kics.2013.38A.1.68

An Early Spectrum Sensing for Efficient Radio Access in Cloud-Conceptual Base Station Systems  

Jo, Gahee (경북대학교 대학원 전자전기컴퓨터학부)
Lee, Jae Won (경북대학교 대학원 전자전기컴퓨터학부)
Na, Jee-Hyeon (한국전자통신연구원)
Cho, Ho-Shin (경북대학교 IT대학 전자공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.38A, no.1, 2013 , pp. 68-78 More about this Journal
Abstract
In this paper, we propose an early spectrum sensing(ESS) as an advance preparation for radio-access trial, which enables multi-mode terminals to access the most appropriate radio-access system in a cloud-conceptual base station system where multiple radio access technologies(RATs) coexist. Prior to a random access to one of RATs, a multi-mode terminal conducts a spectrum sensing over entire frequency bands of whole RATs, then select the RAT with the lowest sensing power, that is likely to have the most available spectrum. Thus, an access failure caused by that the selected RAT has no available radio spectrum could be avoidable in advance. In computer simulation, we consider as various RATs as possible. First, circuit and packet systems are taken into consideration. In addition, the packet systems are classified according to the feasibility of carrier aggregation(CA). In case of terminal, three modes are considered with circuit-only, packet-only, and multi-mode. Subsequently, packet traffic is classified into real-time and non-real-time traffic with three different tolerable delay levels. The simulation includes a call process starting with a call generation and ending up with a resource allocation reflecting individual user's QoS requirements and evaluates the proposed scheme in terms of the successful access probability, system access time, system balancing factor and packet loss probability.
Keywords
Cloud-conceptual Base Station; Radio Access Network; Spectrum Sensing; Call Admission Control; Resource Management;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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