The process group approach to reliable distributed computing
Communications of the ACM
TOTEM: a reliable ordered delivery protocol for interconnected local-area networks
TOTEM: a reliable ordered delivery protocol for interconnected local-area networks
Totem: a fault-tolerant multicast group communication system
Communications of the ACM
The Transis approach to high availability cluster communication
Communications of the ACM
Horus: a flexible group communication system
Communications of the ACM
Building secure and reliable network applications
Building secure and reliable network applications
Wireless Communications: Principles and Practice
Wireless Communications: Principles and Practice
On Group Communication Systems: Insight, a Primer, and a Snapshot
ICCS '01 Proceedings of the International Conference on Computational Sciences-Part I
The intergroup protocols: scalable group communication for the internet
The intergroup protocols: scalable group communication for the internet
Collaborative Computing and E-learning
ICCS '02 Proceedings of the International Conference on Computational Science-Part II
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Strong wired group communication systems have been employed in numerous applications, often characterised by some degree of replication. With the development of wireless technologies, a new series of group applications is emerging and due to the effectively asymmetric characteristics of these networks, existing group communication systems can not be employed directly. Differences between wireless and wired networks in terms of connectivity, latency, bandwidth and other characteristics necessitate alternative algorithms and mechanisms, especially in group communication protocols. In particular, protocols must adapt to highly variable network characteristics in the wireless domain, whilst providing standard group communication semantics and delivering traditional qualities of service. In addition, arbitration between wired and wireless communication entities is required to reconcile the order-of-magnitude (or more) difference in network parameters between the two.The Janus project is developing a strong group communications framework for use in wireless environments. It is envisaged that the findings from our research, as well as the software that results, will be of value in a number of emerging domains such as collaborative computing and multiway application sharing that are moving from fully wired to hybrid wireless and land-line networks.