Journal ArticleDOI
Minimizing Packet Waiting Time in a Multibeam Satellite System
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This paper shows that an assignment which achieves both objectives exists and develops a branch-and-bound algorithm to find it, and suggests several heuristics which require much less computational effort and give very close to optimal results.Abstract:
In this paper, we examine the problem of time-slot assignment in an SS/TDMA system operating in a packet-switched environment. We seek to assign time slots in order to minimize average packet waiting time and in order to maximize transponder utilization. We show that an assignment which achieves both objectives exists and develop a branch-and-bound algorithm to find it. In addition, we suggest several heuristics which require much less computational effort and give very close to optimal results. We derive theoretical bounds on the performance of these heuristics and perform simulation trials to show that, on average, the heuristics are very much better than their bounds suggest, and are, in fact, extremely close to optimal.read more
Citations
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Proceedings ArticleDOI
FIRM: a class of distributed scheduling algorithms for high-speed ATM switches with multiple input queues
TL;DR: A new distributed scheduling algorithm, FIRM, is introduced, which provides improved performance characteristics over alternative distributed algorithms and provides improved fairness and tighter service guarantee than others.
Journal ArticleDOI
Two-dimensional round-robin schedulers for packet switches with multiple input queues
TL;DR: It is demonstrated that the 2DRR scheduler can be implemented using simple logic components, thereby allowing a very high-speed implementation and its performance is compared with that of the input and output queueing configurations, showing that the scheme achieves the same saturation throughput asOutput queueing.
Journal ArticleDOI
Scheduling nonuniform traffic in a packet-switching system with small propagation delay
T. Weller,Bruce Hajek +1 more
TL;DR: Transmission algorithms are introduced for a single-hop packet-switching system with such nonuniform traffic and with propagation delay that is negligible relative to the packet length.
Journal ArticleDOI
Logarithmic Delay for $N \times N$ Packet Switches Under the Crossbar Constraint
TL;DR: It is proved that O(log(N) delay is achievable with a simple frame based algorithm that uses queue backlog information, and is the first analytical proof that sublineardelay is achievable in a packet switch with random inputs.
Journal ArticleDOI
Combined Random/Reservation Access for Packet Switched Transmission Over a Satellite with On-Board Processing: Part I--Global Beam Satellite
Hyong Woo Lee,Jon W. Mark +1 more
TL;DR: A combined random/reservation multiple access (CRRMA) scheme for packet-switched communication over a global beam satellite with on-board processing is proposed and analyzed.
References
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Journal ArticleDOI
An $n^{5/2} $ Algorithm for Maximum Matchings in Bipartite Graphs
John E. Hopcroft,Richard M. Karp +1 more
TL;DR: This paper shows how to construct a maximum matching in a bipartite graph with n vertices and m edges in a number of computation steps proportional to $(m + n)\sqrt n $.
Journal ArticleDOI
An Efficient SS/TDMA Time Slot Assignment Algorithm
TL;DR: This paper presents an efficient time slot assignment algorithm for an SS/TDMA system that is 100% for any traffic matrix and the computer simulation results on the numbers of required switching modes for various simulated traffic matrices are presented.
Journal ArticleDOI
An Optimum Time Slot Assignment Algorithm for an SS/TDMA System with Variable Number of Transponders
TL;DR: An optimal time slot assignment algorithm for any M, N, K, and any traffic matrix is presented, where optimality means achieving the minimal possible total duration for the given traffic matrix.
Journal ArticleDOI
Analysis of a switch matrix for an SS/TDMA system
TL;DR: In this article, a greedy algorithm for a satellite switched/time-division multiple access (SS/TDMA) system is presented, which guarantees a most efficient utilization of a frame period with n2-n (n is the number of beams) number of switchings at most.