A Combination Scheme of ARQ and FEC for Multimedia Wireless ATM Networks

概要

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In the wireless ATM network, the key issue is to guarantee various QoS(Quality of Service)under the conditions of the limited radio link bandwidth and error prone characteristics.In this paper, we show a combination method of the error correction schemes, which is suitable to establish multimedia wireless ATM Networks while keeping an efficient use of the limited bandwidth.We consider two levels of FEC;a bit-level and a cell-level to guarantee cell loss probabilities of real time applications.By combining two levels of FEC, various requirements on cell loss can be met.We then apply the bit-level FEC and ARQ protocol for the data communication;tolerant to the delay characteristics.Through the analytical methods, the required overheads of FECs are examined to satisfy the various QoS requirements of CBR connections.The mean delay analysis for the UBR service class is also presented.In numerical examples, we show how the combination scheme to guarantee various cell loss requirements affects the call blocking probability of the CBR service class and the delay of UBR service class.
社団法人電子情報通信学会の論文
1998-05-25