CLSP를 이용한 대역확산 ALOHA 네트워크의 성능 향상에 관한 연구

A study on the performance improvements of spread ALOHA with CLSP

  • 발행 : 1997.11.01

초록

본 논문에서는 Slotted 대역 확산 ALOHA 네트워크의 효율을 향상시키기 위해 채널 제거 기법 CLSP (CLSP/ CC; Channel Load Sensing Protocol/Channel Clearance)를 제안하였다. 제안된 CLSP/CC는 이동국과 Hub에 간단한 채널 제거 가능만을 추가함으로써 오류가 발생된 패킷의 계속적인 전송을 억제하여, 불필요한 채널 사용을 줄이는 것을 가능하게 한다. 본 논문에서는 기존 CLSP와의 성능 비교를 위해 시뮬레이션을 이용하였으며, 성능 평가 요소로서 네트워크 효율, 평균 처리 시간, 재전송 상태의 이동국 수 등을 고려하였다. 시뮬레이션 결과에 따르면, 제안한 CLSP/CC는 CLSP에 바해 특히 트래픽 부하(offered load)가 많은 환경에서 네트워크 효율과 평균 처리 시간의 성능 향상이 두드러지고, 채널을 효율적으로 사용함으로써 지원할 수 있는 최대 트래픽 부하량이 증가하여, Slotted 대역 확산 ALOHA 네트워크에서 더욱 많은 이동국을 수용할 수 있음을 확인할 수 있다.

This paper presents a new CLSP/CC (Channel Load Sensing Protocol/Channel Clearance) in order to obtain better performance in spread slotted ALOHA networks. This proposed protocol can decrease a wasteful using of channel by prohibiting continuous transmissionof packets destroyed in previous slot, with little added system complexities. The performances of the proposed CLSP/CC, which include network throughput, average processing tiem and the number of mobile stations in retranmission state, are obtained and compared with those of existing CLSP by simulations in this paepr. As the resutls of simulations, the proposed CLSP/CC gets higher throughput and less average processing time, especially in the highly offered load. And CLSP/CC can obtain maximum network throughput at larger offered load than existing CLSP, so it enable to accommodate more mobile station or highly offered loads in slotted spread ALOHA networks.

키워드

참고문헌

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