caa a22 4500 477132928 CHVBK 20180405111709.0 cr unu---uuuuu 170330e19970901xx s 000 0 eng 10.1007/s005300050065 doi (NATIONALLICENCE)springer-10.1007/s005300050065 Scheduling and admission testing for jitter-constrained periodic threads [Elektronische Daten] [Andreas Mauthe, Geoff Coulson] Abstract.: We present new admission tests for periodic real-time threads with explicitly stated deadlines scheduled according to the earliest deadline first (EDF) algorithm. In traditional real-time periodic scheduling, the deadline of a periodic thread is conventionally the end of the current period. In contrast, our tests support periodic threads in which the deadline may be earlier than the end of the current period. In the extreme case, the deadline may be specified as identical to the per period execution time, which results in perfectly isochronous periodic threads. The provision of such threads, which we refer to as jitter-constrained threads, helps end-systems to honour jitter as well as throughput-related QoS parameters in distributed multimedia systems. In addition, such threads can reduce end-to-end delay and buffer memory requirements as less buffering is needed to smooth excessive delay jitter. Springer-Verlag Berlin Heidelberg, 1997 Mauthe Andreas Distributed Multimedia Research Group, Department of Computing, Lancaster University, Lancaster LA1 4YR, UK e-mail: [andreas,geoff]@comp.lancs.ac.uk, GB aut Coulson Geoff Distributed Multimedia Research Group, Department of Computing, Lancaster University, Lancaster LA1 4YR, UK e-mail: [andreas,geoff]@comp.lancs.ac.uk, GB aut https://doi.org/10.1007/s005300050065 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s005300050065 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mauthe Andreas Distributed Multimedia Research Group, Department of Computing, Lancaster University, Lancaster LA1 4YR, UK e-mail: [andreas,geoff]@comp.lancs.ac.uk, GB aut NATIONALLICENCE 700 1- Coulson Geoff Distributed Multimedia Research Group, Department of Computing, Lancaster University, Lancaster LA1 4YR, UK e-mail: [andreas,geoff]@comp.lancs.ac.uk, GB aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer