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QoS routing for a TDMA-based HR-WPAN requires bandwidth (time slots) to be reserved on the entire path. Depending on the way of route discovery and bandwidth reservation, QoS routing can be classified into two types: on-demand (reactive) and table-driven (proactive). Simulation results indicate that table-driven QoS routing outperforms on-demand QoS routing when average hop count is large. When average...
Due to the high packet loss rate during multi-hop transmissions in wireless sensor networks, more reliable end-to-end data transmission is desirable. Because wireless sensor network applications require various levels of communication reliability (CR), the end-to-end data transmission should satisfy the desired CR of the applications. In this letter, we propose a flexible loss recovery mechanism for...
Next-generation mobile communication networks are supposed to provide various high capacity multimedia services to mobile users using various kinds of access networks. Among them, the WiNGS system developed by ETRI as one of 4G mobile system provides high performance RATs (Radio Access Technology) and network architecture with IP connectivity for merging them. In this paper, we propose a new link...
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