quorum-based power saving (qps) protocols allow “asynchronous” wireless hosts, operating in a multi-hop ad-hoc network, to tune to the low power mode conceived in ieee 802.11 mac standard. qps schemes guarantee that the wake-up schedule for every two neighboring hosts would ultimately overlap within a bounded latency so as to be able to accomplish their reciprocal “unicast” communications. a ma...

We explore the use of di erent variants of broadcast protocols for managing replicated databases. Starting with the simplest broadcast primitive, the reliable broadcast protocol, we show how it can be used to ensure correct transaction execution. The protocol is simple, and has several advantages, including prevention of deadlocks. However, it requires a twophase commitment protocol for ensurin...

In this paper, we explore the use of the simple variants of broadcast protocols for managing replicated databases. In particular, we start with the simplest broadcast primitive, the reliable broadcast protocol, and show how it can be used to ensure correct transaction execution. The protocol is simple, and has several advantages, including prevention of deadlocks. However, it requires a two-pha...

The purpose of a reliable broadcast protocol is to allow groups of nodes on unreliable broad cast networks to reliably broadcast messages A reliable broadcast protocol must guarantee two properties all of the receivers in a group receive the broadcast messages and each of the receivers orders the messages in the same sequence In an optimistic approach to reliable broadcast protocol a batch ackn...

A trustworthiness detector in a group communication system raises a suspicion event, whenever one or more group members can no longer be trusted. This suspicion event triggers a group membership protocol to create a new group. This paper describes the design, implementation, and experimental evaluation of a trustworthiness detector that can be incorporated in most group communication systems. T...

It has already been reported that the CAN protocol produces data inconsistencies in some scenarios that violate the Atomic Broadcast properties. It has been proposed a set of higher level protocols to achieve Atomic Broadcast on CAN based systems. This approach causes considerable overhead. We propose a more efficient solution through small modifications to CAN. Our first proposal of modified p...

In this paper we propose a distributed, mobility transparent broadcast (DMTB) protocol to achieve ef£cient and effective broadcast in mobile ad-hoc networks. The protocol is fully distributed and highly adaptive to node mobility. It does not demand any neighborhood information and incurs little overhead. On one hand, the cross-layer design approach helps achieve effective broadcast with higher ...