Random SALOHA and CSMA protocols that are used to access MAC in ad hoc networks are very small compared to the multiple and spontaneous use of the transmission channel. So they have low immunity to the problems of packet collisions. Indeed, the transmission time is the critical factor in the operation of such networks.
The simulations demonstrate the positive impact of erasure codes on the throughput of the transmission in ad hoc networks. However, the network still suffers from the intermittency and volatility of its efficiency throughout its operation, and it switches quickly to the saturation zone. In this context, game theory has demonstrated his ability to lead the network to a more efficient equilibrium. This, we were led to propose our model code set that formalizes the behavior of nodes during transmission within SALOHA networks and CSMA respectively.
FOREWORD ix
INTRODUCTION xi
LIST OF ACRONYMS xv
CHAPTER 1. AD HOC NETWORKS: STUDY AND DISCUSSION OF PERFORMANCE 1
1.1. Introduction 1
1.2. Concepts specific to ad hoc networks 2
1.2.1. Topology 2
1.2.2. Connectivity 3
1.2.3. Mobility 4
1.2.4. Networks: wireless mesh network (WMN), wireless sensor networks (WSN) and mobile ad hoc network (MANET) 5
1.2.5. Routing 7
1.2.6. Weak security 9
1.2.7. Access to the environment 9
1.3. MAC protocols in mobile ad hoc networks 10
1.3.1. ALOHA 10
1.3.2. CSMA 15
1.4. Energy consumption in ad hoc networks 25
1.4.1. Energy overconsumption and/or waste 28
1.4.2. Toward more efficient energy consumption 30
1.5. Conclusion 34
CHAPTER 2lsè