Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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The study for Increasing Service Coverage Area and Enhancing Handover in WiBro Networks

와이브로기반의 서비스영역 확대와 핸드오프 보장에 관한 연구

  • 박지호 (대구경북과학기술연구원) ;
  • 오영환 (광운대학교 전자통신공학과)
  • Published : 2006.05.01
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Abstract

This thesis deals with solutions such as coverage area extension, reduction of the shadow region and performance enhancement of handover caused by structural modification of WiBro network. The More far the distance of RAS(Radio Access Station) and SS(Subscriber Station) is in micro cell, the more bad the quality of channel environment becomes owing to radio interference. Consequently, it causes the deterioration of the throughput and also the deterioration of communication quality in many sides. In fact, most users of WiBro are located in the region, the QPSK region which is bad in point of channel quality. It brings the service complaint by user. We select RS(relay station) to solve the matter caused by channel environment in this cell, and extend coverage and improve the performance of handover call blocking.

이 논문은 휴대인터넷 통신 네트워크 구조 변경으로 커버리지 확대 및 음영지역 해소, 그리고 핸드오버 성능 향상에 관한 논문이다. 마이크로 셀 내의 RAS(Radio Access Station)를 중심으로 SS(Subscriber Station)와의 거리가 멀어질수록 전파감쇄로 인하여 통신환경의 질이 64QAM, 16QAM 그리고 QPSK로 떨어지게 된다. 그 결과 Throughput의 저하는 물론이고, 여러면에서 통신 품질의 질도 떨어지게 된다. 실제로 휴대인터넷의 대부분의 지역은 환경이 좋지 않은 QPSK 지역으로 사용자 대부분은 이러한 지역에서 휴대인터넷을 사용하게 된다. 그 결과 사용자들은 많은 불만을 가지게 될 것이다. 이런 셀 내의 통신환경으로 인한 문제점을 해결하기 위하여 RS(Relay Station)를 적용하여 셀의 커버리지 확대는 물론이고, 통신환경을 향상시켜 핸드오버 호 블록킹 성능 향상을 시키는데 그 목적이 있다.

Keywords

References

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