The next generation of communication networks will need to support rapid, dynamic deployments of independent mobile users. Mobile users should be able to connect to each other directly and wirelessly without centralized network infrastructure. They form mobile ad hoc networks (MANET). These networks are self-configured and self-healing, and therefore easily adopted in a home environment and cheaply deployed and maintained in a business environment. MANETs are gaining in popularity and usage. Group communication technologies have already shown their importance in education, entertainment, business, military, and other industries. However, the group communication technologies have mainly been designed for use in the Internet. This e-book focuses on group communication solutions for mobile ad hoc networks.

Research on group communications in ad hoc networks is still in its infancy. There are many open issues due to the gap between availability of resources such as energy and bandwidth in ad hoc networks and the quality of service required by group communication services. We have selected for this e-book nine research papers which fall into the following major areas: multicast routing, broadcasting, security, resilience, and performance and design-tradeoff evaluations.