نتایج جستجو برای: broadcast protocol
تعداد نتایج: 276278 فیلتر نتایج به سال:
Vehicular Ad-Hoc Networks (VANET) helps to improve the traffic safety by exchanging information between each other and hence the drivers can prepare for a dangerous situation. The Routing protocol for multihop broadcast helps to provide efficient routing in broadcast communications. This protocol has some routing overhead in different network scenarios. Here in the proposed method the network t...
In wired networks, the broadcast data packets can be easily and safely delivered to destinations. Nevertheless, it is a big challenge to transfer the broadcast frames over the IEEE 802.11 based multi-hop ad hoc wireless networks due to the high bit error rate, the high collision probability, and the lake of acknowledgement (ACK). Unfortunately, most of routing protocols need the broadcast funct...
CSMA/CA, MAC, protocol, network, broadcast, wireless, 802.11, RTS/CTS This paper presents a scheme to improve the efficiency of radio MAC protocols in the case of broadcast and multicast transmissions, like TCP/IP multicasting. First, the reliability problems with broadcast packets and their consequences are analysed. Then the Robust Broadcast scheme is presented, which decreases the probabilit...
The distributed applications require group communications among multiple entities. In the group communication, it is important to discuss in what order each entity in the group can receive data units. In order to realize fault-tolerant systems, the same events have to occur in the same order in each entity. The ordering among the events is known as a causal order. This paper presents a reliable...
In a previous lecture, we defined the Byzantine agreement/broadcast problems and showed that there is no protocol solving these problems when the fraction of corrupted players is 1/3 or larger. Today, we prove the converse by showing a protocol for broadcast (and hence Byzantine agreement; cf. the previous lecture) when the fraction of corrupted players is less than 1/3. The protocol we will sh...
With increasingly popular wireless and low-power sensors/devices, broadcast is one of essential operations to enhance information accessibility and availability. Due to the lack of centralized coordination and limited resources, however, designing an efficient broadcast protocol is challenging in Wireless Sensor Networks (WSNs). Although on-board Global Positioning System (GPS) based broadcast ...
State machine replication is a popular approach to increasing the availability of computer services. While it has been largely studied in the presence of crash-stop failures and malicious failures, all existing state machine replication protocols that provide byzantine faulttolerance implement some variant of atomic broadcast. In this context, this paper makes two contributions. First, it prese...
Many to many reliable broadcast is useful while building distributed services like group membership and agreement in a MANET. Efforts in implementing reliable broadcast optimised for MANETs have resulted in new protocols that reduce the number of transmissions required to achieve reliable broadcast. A practical implementation of reliable broadcasts requires the ability to detect message stabili...
Atomic broadcast is a communication primitive that allows a group of n parties to deliver a common sequence of payload messages despite the failure of some parties. We address the problem of asynchronous atomic broadcast when up to t < n/3 parties may exhibit Byzantine behavior. We provide the first protocol with an amortized expected message complexity of O(n) per delivered payload. The most e...
A broadcast protocol allows a sender to distribute a message through a point-to-point network to a set of parties, such that (i) all parties receive the same message, even if the sender is corrupted, and (ii) this is the sender’s message, if he is honest. Broadcast protocols satisfying these properties are known to exist if and only if t < n/3, where n denotes the total number of parties, and t...
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