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Previous works on real-time task graph models have ignored the crucial resource sharing problem. Due to the non-deterministic branching behavior, resource sharing in graph-based task models is significantly more difficult than in the simple periodic or sporadic task models. In this work we address this problem with several different scheduling strategies, and quantitatively evaluate their performance...
With K-hop interference model, especially when K ≥ 2, the throughput-optimal centralized scheduler needs to solve a NP-Hard problem. It leads to the desire of a distributed, low-complexity but throughput-optimal scheduling algorithm. We generalize a randomized scheduling framework for a K-hop interference model and develop two randomized distributed scheduling algorithms which can be integrated into...
Wireless mesh networking is a promising technology for building broadband wireless access networks. However, wireless mesh networks based on CSMA/CA MAC protocols suffer from unfairness and poor QoS support. Using TCP as a rate control mechanism in such networks further exacerbates the problem. Efficient rate allocation and scheduling algorithms that handle both multicast and unicast traffic in wireless...
The next generation of wireless networks (4G) will use OFDMA (Orthogonal Frequency Division Multiple Access) in the reverse link. In OFDMA, the reverse link resources assigned to a user are called tiles each of which consists of a subset of consecutive subcarriers. Since at most one user is assigned to each of these tiles then reverse link transmissions within a sector are orthogonal. However, the...
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