• Proceedings of the Korean Information Science Society Conference
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• 1998.10a
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• pp.220-222
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• 1998

유선 통신과 다르게 무선 통신은 자원의 한정성이란 매체의 특성을 가지고 있어 다중의 사용자가 다른 QoS를 요구하는 멀티미디어 서비스를 지원하기 위해서는 각각의 서비스에 따른 트래픽에 차별화를 두어 매체 접속을 제어하는 것이 효과적인 방법이 될 것이다. 현재, 음성과 데이터를 통합하여 매체 접속 제어를 하는 패킷 예약 다중 접속 방식은 많은 연구가 이루어진 상태이고, 특히, 멀티미디어 지원을 위해 적응형 패킷 예약 다중 접속(APRMA: Adaptive Packet Peservation Multiple Access)방식의 연구가 진행되었다. 본 논문에서는 멀티미디어 지원을 위한 다른 한가지 방법으로 패킷이 경쟁에 참여할 수 있는 파라미터를 서비스의 종류와 활성중인 슬롯의 수에 따라 조정하여 채널의 효율을 보다 향상시키고 패킷 충돌이 일어날 확률도 감소 시킬 수 있는 우선 순위 기반 적응형 패킷 예약 매체 접속 방법 (APRMA_P : APRMA with Prioroty)을 제시한다. 제안된 APRMA_P의 성능을 분석하기 위해 시뮬레이션을 통해서 체널 효율을 기존의 APRMA와 비교 분석한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.22 no.10
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• pp.2292-2302
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• 1997

In this paper, we propose a wireless MAC protocol named APRMA, which is capable of supporting the ABR type data service and maximizing channel utilization. In PRMA protocol, data terminals with random data packets cannot reserve slot. That is, slot reservation is applicable to the time constraint voice packet exclusively. But the reservation scheme has to be performed for loss sensitive data packet, and so data packets can get their quality of service. Therefore, in wireless MAC, reservation technique has to be used for both voice and data services. But in service aspects, if a fixed bandwidth is allocated to data terminals, time constraint voice packets may have a low efficiency. So in this study, the terminal which wants to request for ABR tyupe service, acquires a minimum bandwidth from system for thefirst time. If the system has extra available bandwidth, ABR terminals would acquire additional bandwidth slot by slot. As a result, APRMA protocol cansupporty the data service with loss sensitivity and maintain their channel utilization high. Also high priority services like voice can be satisfied with their QoS by APRMA.

• Journal of Internet Computing and Services
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• v.4 no.5
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• pp.61-68
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• 2003

In this paper, we propose a wireless MAC protocol named APRMA, which is capable of supporting the ABR type data service and Maximizing channel utilization. Data terminals with random data packets are not provided slot reservation with PRMA protocol. That is, slot reservation is applicable to the time constraint voice packet exclusively. But the reservation scheme have to be performed for loss sensitive data packet, and contended their quality of service, Therefore, in wireless MAC, reservation technique has to be used for both voice and data services. So the terminal which wants to request for ABR type service, is allocated a minimum bandwidth from system for the first time, If the system have some extra available bandwidth, ABR terminals would acquire additional bandwidth slot by slot, As a result, APRMA protocol can support the data service with loss sensitivity and maintain their channel utilization high.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2000.11a
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• pp.463-470
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• 2000

In this paper, we describe a wireless MAC protocol named APRMA(Abitrary Period Reservation Multiple Access), which is capable of supporting the ABR type data service and maximizing channel utilization. In original PRMA protocol, data terminals with random data packets cannot reserve slot. That is, slot reservation is applicable to the. time constraint voice packet exclusively. But the reservation scheme have to be performed for loss sensitive data packet, so data packets can get their quality of service. The aspects of service, if fixed bandwidth is allocated to data terminals, time constraint voice packets may have a low efficiency So in this study, the terminal which wants to request for ABR type service, acquires a minimum bandwidth from system for the first time. If the system have extra available bandwidth, ABR terminals would acquire additional bandwidth slot by slot. As a result, APRMA protocol can support the data service with loss sensitivity and maintain their channel utilization highly. Also high Priority services like voice can be satisfied with their QoS by APRMA.