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A fast ad-hoc neighbor discovery algorithm based on a Friend Trust mechanism (FTM) is proposed for a MANET randomly and temporarily deployed by mission driven, called mission-driven MANET. We work on three aspects to reduce the neighbor discovery time. First, we design a simplified Interframe Space mechanism to constrain collisions in a transmission round. Second, we proposed a novel Friend Trust...
In Orthogonal Frequency Division Multiple Access (OFDMA), there are multiple sub-channels which enable multiple stations to transmit concurrently on different sub-channels. The stations can obtain the channel information of all the sub-channels at each time instant. Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) allows different stations to randomly contend for the available subchannels...
Millimeter-wave (mmWave) wireless systems are a focus of great interest for very high data transmission rate in a short range. Considering short-range communication with a range of the order of several tens of centimeters, only terminals present in this communication range will be influenced. In one-to-one communication, a simpler and more efficient access mechanism is required. Current CSMA/CA based...
How to simultaneously achieve fairness and quality-of-service (QoS) guarantee in QoS-oriented wireless local area networks (LANs) is an important and challenging issue. Targeting at this goal and jointly taking priority setting, fairness, and cross-layer design into account, four scheduling schemes designed for the QoS-oriented wireless LAN mainly based on concepts of deficit count and allowance are...
IEEE 802.11e standard has been published in 2005. In the next few years, we may expect a proliferation of 802.11e capable stations. In the mean time, the legacy 802.11 stations will exist Therefore, it is of practical significance to study the network performance when 802.11 stations and 802.11e stations coexist. In this paper, a novel Markov chain based analytical model is proposed to investigate...
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