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With the popularity of wireless devices and the increasing demand of network applications, it is emergent to develop more effective communications paradigm to enable new and powerful pervasive applications, and to allow services to be accessed anywhere, at anytime. However, it is extremely challenging to construct efficient and reliable networks to connect wireless devices due to the increasing communications...
We consider joint congestion control and wireless link-scheduling design for mobile TCP applications. Adopting queueing delay as the congestion measure, we show that the optimal TCP congestion control and link scheduling scheme amounts to window-control oriented implicit primal-dual solvers for underlying network utility maximization. Based on this idea, we develop readily deployable, scalable yet...
In this paper, cross-layer combining of an adaptive modulation-coding (AMC) scheme at the physical layer and the use of automatic repeat request (ARQ) retransmissions at the medium access control (MAC) layer is integrated into the design of scheduling for multi-user wireless networks. A class of scheduling algorithms capable of jointly collecting retransmission diversity and multi-user diversity are...
We report an ultra-low-power low-cost Gaussian pulse generator for 3.1-10.6 GHz impulse-radio carrier-free ultra wideband (UWB) transceiver designed and fabricated in foundry logic 90 nm CMOS. A two-stage circuit topology is used to generate square waveform and Gaussian pulse waveform, respectively. Three digital controls are used to adjust delay time between the two generated square waves to realize...
In general, TCP sender will take all the packet losses as congestion caused and reduce the packet sending rate to avoid the worsening of network condition. In multihop wireless networks, the long propagation time, poor link quality and high bit error rate make this scheme slow-moving, overcompensated and inefficient.This paper proposes a new optimized data delivery scheme, called TCP receiver-aided...
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