Yuh-Pyng Shieh

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Mapping multiple virtual network (VN) requests with constraints on virtual nodes and virtual links into a shared substrate network presents a significant challenge and is an NP-hard problem. In this paper, we propose a heuristic node and link mapping algorithm that handles online VN requests. The node mapping algorithm selects a substrate node that(More)
This paper proposes a new per-class bandwidth constraint algorithm, called the multipath selection algorithm (MSA), for a DiffServ-aware traffic engineering (DiffServ-TE). The MSA comprises three steps. First, a given source uses the MSA to find multiple label switch paths (LSPs) from the source to a destination for a specific class type (CT). Second, the(More)
Multimedia services are typically much more sensitive to throughput, delay, and packet loss than traditional services. These parameters give technical performances of the network but they do not reveal QoS perceived by users. Hence, how to capture users’ overall perceptions when they are using network services is an important issue. In this paper,(More)