Scheduling Method for QoS Support in High-Speed Portable Internet System

휴대 인터넷에서 QoS를 고려한 스케쥴링 방식 연구

  • 김경희 (전북대학교 산업공학과) ;
  • 국광호 (서울산업대학교 산업공학과) ;
  • 김경수 (한국전자통신연구원) ;
  • 임석구 (천안대학교 정보통신학부)
  • Published : 2005.02.01


HPI system provides 1-3 Mbps data transmission speed to terminals moving up to 60 km/sec. Since HPI supports rtPS, nrtPS, and BE services requiring different QoS, it needs an efficient scheduling method based on those different QoSs. This paper suggests an uplink scheduling method which gives priority to services in the order of rtPS, nrtPS and BE services but which reserves some bandwidth for the low priority services before it allocates the bandwidth to higher priority services. Simulation results show that it can improve the uplink performance by reserving mean transmission rate to each nrtPS terminal and by reserving bandwidth, which amounts to about 1.5 times the mean transmission rate of the whole BE terminals, to the whole BE terminals.