Ting-Chao Hou

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This paper presents a model for analyzing the performance of transmission strategies in a multihop packet radio network where each station has adjustable transmission radius. A larger transmission radius will increase the probability of finding a receiver in the desired direction and contribute bigger progress if the transmission is successful, hut it also(More)
The ad hoc network is a temporary wireless system without a fixed (wired or wireless) infrastructure. Many clustering algorithms have been proposed to partition mobile users into clusters to support routing and network management. Most previous studies, however, focus on algorithm design, lacking an overall evaluation of clustering overheads. In this paper,(More)
This paper studies the impact of node density on the end-to-end throughput and delay in multi-hop wireless networks. In existing work, each packet is most assumed to be relayed through one cell at each hop and the hop progress is approximated by the square root of a cell area, which does not correspond to the actual hop progress in the real network. In this(More)
In MANETs querying routes by blind flooding often incurs redundancy, contention, and collision. These phenomena are known as the broadcast storm problem, which will degrade the network performance. To alleviate the broadcast storm problem, we propose a controlled flooding mechanism, called zone-based controlled flooding (ZCF), to improve the efficiency of(More)
In order to ensure an efficient network control for mobile ad hoc networks, nodes are usually aggregated into clusters to provide a convenient framework. However, an important issue on how to properly assign channels over a multi-cluster structure has not been studied in depth. In this paper, we first propose a new clustering algorithm to facilitate(More)
  • Ting-Chao Hou
  • IEEE Journal on Selected Areas in Communications
  • 1996
A circuit switching fabric that switches narrowband (DSO), wideband (Nx DSO, NxVT), and broadband (STS-N) signals embedded in SONET streams is studied. Based on the Clos strictly nonblocking principle, the fabric is strictly nonblocking if all path hunts are performed at the basic-rate @SO in our case) level. On the other hand, a hierarchical path hunt can(More)