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The special communication scenario in High-Speed Train (HST) not only leads to an increasing demand of high throughput and continuous multimedia services but also arises many other challenges for cellular network access technology, such as high mobility, frequent and group handovers etc. In order to address above problems, we propose an HST WiFi network application scheme which adopts multi-hop technology...
We present a performance study of a wireless mesh network based on off-the-shelf 802.11 technology. Unlike earlier work, we explore the practical constraints of the use of a “vanilla”, unmodified 802.11 MAC layer. We also consider the use of multiple radios, in the 5GHz band, to reduce interference. We establish the origin of degradation and limits in performance of practical deployments and study...
This paper proposes a technique for topology control (TC) of wireless nodes to meet Quality of Service (QoS) requirements between source and destination node pairs. The nodes are assumed to use a TDMA (Time Division Multiple Access) based MAC (Medium Access Control) layer. Given a set of QoS requirements, a set of wireless nodes and their initial positions, the goal is to find a topology of the nodes...
The capacity of a multi-hop wireless network is the traffic payload that it can transport. This is a prominent quality of service issue, particularly in the highly constrained settings of 802.11 wireless mesh network. In this paper, we consider two complementary definitions of the capacity. A network-wise capacity is defined as the sum of the upload traffic, and a flow- wise capacity highlighting...
Wireless ad hoc networks using omni-directional antennas do not scale well due to interference between nearby nodes. Maintaining the QoS of the communications in this type of network is a difficult task. Using multiple narrow beam directional antennas alleviates this problem at the expense of connectivity. Multi-beam smart antennas allow the network topology to be adjusted dynamically by adjusting...
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