Parallel Algorithms and Architectures: International by H. Alt, T. Hagerup, K. Mehlhorn, F. P. Preparata (auth.),

By H. Alt, T. Hagerup, K. Mehlhorn, F. P. Preparata (auth.), Andreas Albrecht, Hermann Jung, Kurt Mehlhorn (eds.)

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Extra info for Parallel Algorithms and Architectures: International Workshop Suhl, GDR, May 25–30, 1987 Proceedings

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Just as the delay, the amount of service, Bim (t ) , that each active flow has received so far is communicated from the Application Layer to the MAC layer. Using these three instantaneous parameters, the MAC layer computes a cost function Cimk (t ) = f (Bim (t ), PERm,k (t )) for each active flow at the beginning of each time slot. The flow that minimizes the cost function on the given OFDM subcarrier is allocated the corresponding carrier to meet its delay bound of Dmax,i (t ) . Dmax, i Bi,m(t) Rm,k (t ) = W log 2 (γ m,k (t ) + 1) = 33 Data Link Layer (L2) BERm,k(t) Scheduling Decision Physical Layer (L1) Fig.

We refer to the discrete-time interval [t , t + 1), t = 0,1,2,L as time slot t. The star network topology adopted in this work can represent a cell of a cellular wireless network, or the interface between multiple stations and a relay station in infrastructureless wireless networks [9]. Each user can maintain multiple queues of different applications simultaneously. Packets in each queue have the same delay requirements and hence are managed by the first-in first-out (FIFO) principle. However, in times of buffer overflow, packets are discarded from a queue according to the random early discard [10] principle to prevent the occurrence of global synchronization [10], [11].

326) as GYASI-AGYEI 36 ak ,t = hf k (~ x1,t , ~ x2,t , L , ~ x5,t ), k = 1,2, L ,5 ~ bk ,t = hf k (x1,t + a1,t h / 2, ~ x2,t + a2,t h / 2, L , ~ x5,t + a5,t h / 2) ~ ~ ~ c = hf (x + b h / 2, x + b h / 2, L , x + b h / 2 ) and Networks Applications Conference (ATNAC), December 2004, pp. 582–589. [Online]. pdf k ,t k 1,t 1,t 2,t 2 ,t 5,t 5,t (28) d k ,t = hf k (~ x1,t + c1,t h, ~ x2,t + c2,t h, L , ~ x5,t + c5,t h ) ~ xk ,t +1 = ~ xk ,t + (ak ,t + 2bk ,t + 2ck ,t + d k ,t ) 6 x ), k = 1,2, L are as given in (10)-(14), respectively.

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