311. |
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312. |
- Möller, Niels, et al.
(författare)
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Making retransmission delays in wireless links friendlier to TCP
- 2004
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Konferensbidrag (refereegranskat)abstract
- Heterogeneous communication networks with their variety of application demands, uncertain time-varying traffic load, and mixture of wired and wireless links pose several challenging problem in modeling and control. In this paper we focus on the packet delay, which is an important variable for efficient end-to-end congestion control. In particular, we study the delay effects of radio links which use power control and link-layer retransmissions. Link-layer retransmissions induce delays which do not conform to the assumptions on which the transport protocol is based. This causes undesired TCP control actions which reduce throughput. A link-layer solution based on adding carefully selected delays to certain packets is proposed to counteract this problem. All information needed for this is available locally at the link.
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313. |
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314. |
- Ninness, B., et al.
(författare)
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Analysis of the variability of joint input-output estimation methods
- 2005
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Ingår i: Automatica. - : Elsevier BV. - 0005-1098 .- 1873-2836. ; 41:7, s. 1123-1132
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Tidskriftsartikel (refereegranskat)abstract
- It has been recently established that, when estimating parametric models on the basis of closed loop data, the frequency domain variability of direct and various indirect methods may significantly differ from one another. This paper continues this work by analysing the performance of certain common joint input-output estimation methods.
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315. |
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316. |
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317. |
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318. |
- Ninness, Brett, et al.
(författare)
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Generalized Fourier and Toeplitz results for rational orthonormal bases
- 1998
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Ingår i: SIAM Journal on Control and Optimization. - 0363-0129 .- 1095-7138. ; 37:2, s. 429-460
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Tidskriftsartikel (refereegranskat)abstract
- This paper provides a generalization of certain classical Fourier convergence and asymptotic Toeplitz matrix properties to the case where the underlying orthonormal basis is not the conventional trigonometric one but rather a rational generalization which encompasses the trigonometric one as a special case. These generalized Fourier and Toeplitz results have particular application in dynamic system estimation theory. Specifically, the results allow a unified treatment of the accuracy of least-squares system estimation using a range of model structures, including those that allow the inclusion of prior knowledge of system dynamics via the specification of fixed pole or zero locations.
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319. |
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320. |
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