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A Study on the Bandwidth Assignment Scheme for Video Data Using Dynamic Parameters in the Wireless ATM Networks (무선 ATM망에서 동적 변수를 이용한 비디오 데이터의 대역폭 할당방식에 대한 연구)

  • Jang, Dong-Hyeok;Kim, Seung-Hwan;Lee, Sun-Sook;Kwon, Oh-Seok
    • The KIPS Transactions:PartC
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    • v.9C no.1
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    • pp.73-78
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    • 2002

  • In WATM networks, in order to perform dynamic slot allocation required slots of mobile terminals are estimated based on DP (Dynamic Parameter) reflecting characteristics of traffic. In VBR (Variable Bit Rate) traffic, slot allocation is done at MT considering both time-dependent characteristics and QoS (Quality of Service) requirements. In this paper, DPs-buffer state information and buffer state change-are transmitted through in-band signaling. BS (Base Station) performs dynamic slot allocation considering traffic characteristics of each MT (Mobile Terminal), in other words, buffer state information informs the potentiality of 'buffer full state'to BS if MT buffer is over the specific threshold value and buffer state change notifies change in buffer state of incoming cells to MT. If buffer state information is equal to 'low (more than threshold)' and 'abrupt increase' it generates 'buffer full' state cell transmission delay or cell loss might occur. At this time BS should assign additional slots to MT, and then MT consumes cells in its buffer. In simulation, the proposed scheme shows better performance in cell delay and loss than EPSA (Estimation-Prorated Slot Assignment) in-band scheme.

  • https://doi.org/10.3745/KIPSTC.2002.9C.1.073 인용 PDF KSCI