Random Access in DVB-RCS2: Design and Dynamic Control for Congestion Avoidance

In the current DVB generation, satellite terminals are expected to be interactive and capable of transmission in the return channel with satisfying quality. Considering the bursty nature of their traffic and the long propagation delay, the use of a random access technique is a viable solution for such a Medium Access Control (MAC) scenario. In this paper, random access communication design in DVB-RCS2 is considered with particular regard to the recently introduced Contention Resolution Diversity Slotted Aloha (CRDSA) technique. This paper presents a model for design and tackles some issues on performance evaluation of the system by giving intuitive and effective tools. Moreover, dynamic control procedures that are able to avoid congestion at the gateway are introduced. Results show the advantages brought by CRDSA to DVB-RCS2 with regard to the previous state of the art.Comment: Accepted for publication: IEEE Transactions on Broadcasting; IEEE Transactions on Broadcasting, 201

Delay minimization for packet satellite communication systems.

Wong, Wing-ming Eric.Thesis (M.Phil.)--Chinese University of Hong Kong, 1990.Bibliography: leaves 46-47.ACKNOWLEDGMENTSABSTRACTChapter Chapter 1 --- INTRODUCTION --- p.1Chapter 1.1 --- Advantages and Disadvantages --- p.1Chapter 1.2 --- Satellite System Engineering --- p.2Chapter 1.3 --- Channel Allocation Methods --- p.3Chapter 1.4 --- Outline of this Thesis --- p.5Chapter Chapter 2 --- DELAY BOUNDS --- p.6Chapter 2.1 --- Introduction --- p.6Chapter 2.2 --- The Packet Satellite System --- p.7Chapter 2.3 --- The Idealized Protocol with Contention-Free Reservation --- p.8Chapter 2.4 --- Delay Lower Bound for Protocols with Contention-Free Reservation --- p.9Chapter 2.5 --- Delay Lower Bound for Protocols with Contention-Based Reservation --- p.14Chapter Chapter 3 --- IN SEARCH OF A MINIMUM DELAY PROTOCOL --- p.23Chapter 3.1 --- Introduction --- p.23Chapter 3.2 --- The Packet Satellite System --- p.25Chapter 3.3 --- The Transmission Protocol --- p.26Chapter 3.4 --- Throughput Analysis --- p.27Chapter 3.5 --- Delay Analysis --- p.28Chapter 3.6 --- Minimization of DI --- p.31Chapter 3.7 --- Minimization of DII --- p.38Chapter 3.8 --- Numerical Examples --- p.38Chapter Chapter 4 --- CONCLUSIONS --- p.45REFERENCES --- p.46APPENDIX --- p.4

A Survey on Delay-Aware Resource Control for Wireless Systems --- Large Deviation Theory, Stochastic Lyapunov Drift and Distributed Stochastic Learning

In this tutorial paper, a comprehensive survey is given on several major systematic approaches in dealing with delay-aware control problems, namely the equivalent rate constraint approach, the Lyapunov stability drift approach and the approximate Markov Decision Process (MDP) approach using stochastic learning. These approaches essentially embrace most of the existing literature regarding delay-aware resource control in wireless systems. They have their relative pros and cons in terms of performance, complexity and implementation issues. For each of the approaches, the problem setup, the general solution and the design methodology are discussed. Applications of these approaches to delay-aware resource allocation are illustrated with examples in single-hop wireless networks. Furthermore, recent results regarding delay-aware multi-hop routing designs in general multi-hop networks are elaborated. Finally, the delay performance of the various approaches are compared through simulations using an example of the uplink OFDMA systems.Comment: 58 pages, 8 figures; IEEE Transactions on Information Theory, 201

Multiple Access Protocols for Data Communications via VSAT Networks

One of the most significant advantages of VSAT Networks is the ability to link together many terminals at remote sites under a single manageable network and to adapt the performance characteristics of the network to the requirements of the type of data traffic presented to the network