A conflict sense routing protocol and its performance for hypercubes

Includes bibliographical references (p. 23-24).Supported by NSF. NSF-DDM-8903385 Supported by ARO. DAAL03-86-K-0171by Emmanouel A. Varvarigos and Dimitri P. Bertsekas

Decentralised multi-access MAC protocol for ad-hoc networks

In ad-hoc radio networks, mechanisms on how to access the radio channel are extremely important in order to improve network efficiency and, when needed, to guarantee QoS. Traditionally, Medium Access Control (MAC) protocols in ad hoc networks have been designed to face off the well known collision resolution problem. However, when using advanced signal processing techniques, general assumptions on collisions and packet loss are no longer valid. Besides, little has been reported about MAC algorithms dealing with multiaccess channels in ad hoc networks. In this paper, we present a novel decentralized multiaccess MAC protocol for Ad Hoc networks. This MAC protocol is an hybrid CDMA-TDMA in which a cross layer approach has been followed to dinamically adapt to the traffic load. Closed expressions for the throughput and delay of the network are presented as a function of the multipacket reception capability of the receiver, the number of codes and the packet retransmission probability.Postprint (published version

Analysis and evaluation of decentralized multiaccess Mac for ad-hoc networks

In mobile ad-hoc radio networks, terminals are mobile and heterogeneous, the architecture of the network is continuously changing, communication links are packet oriented and radio resources are scarce. Therefore, mechanisms on how to access the radio channel are extremely important in order to improve network efficiency and, when needed, to guarantee QoS. However, due to these network harsh conditions, decentralized Medium Access Control (MAC) protocols designed specifically for ad hoc networks are scarce. In this paper we present a novel decentralized multiaccess MAC protocol for Ad Hoc networks. This MAC protocol is an hybrid CDMATDMA in which a cross layer approach has been followed in order to maximize network throughput. A theoretical analysis of the system is presented ending up with closed expressions for the throughput and delay of the network and some simulations are presented to evaluate the performance of the system.Postprint (published version

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

The tone sense multiaccess protocol with partial collision detection (TSMA/PCD) for packet satellite communications.

by Lo Man Keung.Abstract in Chinese and English.Thesis (M.Ph.)--Chinese University of Hong Kong, 1987.Bibliography: leaves 80-81

Description and Experience of the Clinical Testbeds

This deliverable describes the up-to-date technical environment at three clinical testbed demonstrator sites of the 6WINIT Project, including the adapted clinical applications, project components and network transition technologies in use at these sites after 18 months of the Project. It also provides an interim description of early experiences with deployment and usage of these applications, components and technologies, and their clinical service impact