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The traditional adaptive Random Early Detection (RED) algorithm allows network to achieve high throughput and low average delay. However it uses a linear dropping probability function, which causes high jitter in the core router. To overcome the drawbacks of queue jitter in the traditional adaptive RED algorithm, this paper proposes a new Non-Linear Adaptive RED (NLAR) approach based on the Active...
In order to coexist with existing legacy wireless systems, the transmit power spectral density (PSD) of ultra-wideband (UWB) impulse radio systems is limited. The coverage range of the UWB systems is then confined within a few meters. One possible way to achieve a greater coverage is a short-range multihop relaying strategy. This paper proposes a two-hop UWB relay system using multiple detect-and-forward...
In this paper, a dual-hop multiple-input multiple-output (MIMO) ultra-wideband (UWB) communication system in a frequency-selective fading environment is presented for the first time. The focus is on the case that partial channel state information (CSI) is only available at the receiver side. The relaying schemes associated with this case are proposed, and the exact outage probability analysis of the...
In order to achieve the accurate traffic control of P2P in application layer, a bypass mechanism for P2P control is proposed, which first estimates the packets rates by the TSW (Time Sliding Window) rate estimator and then blocks certain sessions by some strategies. Based on a large number of experiments and theoretical analysis, this paper discusses the appropriate value of the time sliding window...
This paper discusses the channel capacity of multiantenna ultra-wideband (UWB) indoor wireless systems. It is shown first that for both single-input single-output (SISO) and multiple-input multiple-output (MIMO) cases, when the transmit SNR is lower than some value, say -20 dB, using optimal power spectrum allocation (OPSA) at the transmitter side can increase the reliable transmission rate considerably...
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