Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Service Self-Organization Method in LTE-Advanced Heterogeneous Networks

LTE-Advanced 융합 망에서 서비스 자기-조직화 방법

  • Lee, Gi-Sung (Div. of Computer and Game, Howon University) ;
  • Lee, Jong-Chan (Dept. of Computer Information Eng., Kunsan National University)
  • 이기성 (호원대학교 컴퓨터.게임학부) ;
  • 이종찬 (군산대학교 컴퓨터정보공학과)
  • Received : 2015.08.17
  • Accepted : 2015.09.11
  • Published : 2015.09.30
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Abstract

In LTE-Advanced that different networks coexist, it is considered that it is actually difficult to provide service continuity with a procedural and static control method applied to the existing voice service. This paper suggests Service Self-Organization to support the service continuity effectively based on SON. It means a method in which a subscriber's terminal collects information about its current condition and base station around, and a base station, through the data collected by monitoring inner or adjacent base station, shares related data and converges, controlling service continuity on its own. In other words, as context information of mobile terminal and base station changes, set-up of related functions such as ISHO, cell selection, source allocation, load control, and QoS mapping is adapted; each function fits into the change, exchanges the process of reorganization, and interacts; these actions go toward to satisfy service continuity. Simulation results show that it provides better performances than the conventional one with the measure of resource utilization rate and outage probability.

상이한 망이 공존하는 LTE-Advanced에서 기존 음성 서비스에 적용된 절차적이고 정적인 제어방식으로는 서비스 연속성을 효과적으로 지원하는 것은 현실적으로 어렵다고 여겨진다. 본 논문에서는 SON를 기반으로 서비스 연속성을 효과적으로 지원하기 위한 서비스 자기-조직화를 제시하고자 한다. SON을 통하여 가입자 단말기는 자신의 현재 상태 및 주변 기지국 정보를 수집하고, 기지국은 내부 및 인접한 기지국 모니터링으로 수집된 정보를 통하여, 관련 제어 데이터를 공유하고 이를 종합 분석하여 서비스 연속성을 자체적으로 조절/제어하는 방법을 제안한다. 서비스 자기-조직화는 단말기 및 기지국의 상태 정보 변화에 따라 관련 기능(여기서 기능은 ISHO, 셀 선정, 자원 할당, 부하 제어, QoS 매핑 등을 의미함)의 설정을 동적으로 제어하고, 각각의 기능들이 변화에 적응하여 조정되고 재구성하는 과정을 주고받으면서 각 기능들이 상호 작용하게 된다. 이러한 동작들이 서비스 자기-조직화를 통하여 서비스 연속성을 만족시키는 방향으로 이루어진다. 자원 이용률과 outage 확률을 성능척도로 하여 수행된 시뮬레이션 결과에 의하면 제안된 방안은 기존 방안에 비하여 더 우수한 성능을 가짐이 확인된다.

Keywords

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