G. Gomez

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Problem statement: Causal ordering is used in Mobile Distributed Systems (MDS) to reduce the non-determinism induced by four main aspects: host mobility, asynchronous execution, unpredictable communication delays and unreliable communication channels. Some causal protocols have been proposed for MDS. All of these protocols in order to ensure the causal(More)
26 27 The paper presents an efficient ∆-causal algorithm for the transmission of real-time continuous 28 media (e.g. audio and video) in distributed systems. The ∆-causal algorithm is oriented to be used in 29 real-time collaborative applications, such as Teleconferece and Teleimmersion. The ∆-causal 30 algorithm ensures causal delivery of messages with(More)
Causal ordering is a useful tool for mobile distributed systems (MDS) to reduce the non-determinism induced by three main aspects: host mobility, asynchronous execution, and unpredictable communication delays. Several causal protocols for MDS exist. Most of them, in order to reduce the overhead and the computational cost over wireless channels and mobile(More)
A cellular network consists of two main components: base stations (BS) and mobile hosts (MH). It is through base stations that mobile hosts can communicate. In order to reduce the causal overhead and the computational cost over mobile hosts, most of the existing protocols for cellular networks ensure causal order at BSs. However, these protocols introduce(More)
The Internet 2 deployment introduces new capabilities, such as multi-party collaboration, high-scale multimedia assembly and multicast communication. For this reason, the research concerning security is facing new challenges. One such challenge is to create secure multi-session frameworks to ensure the confidentiality of exchanged information. In a(More)
In this paper, an end-to-end Quality of Service (QoS) framework for streaming services in 3G mobile networks is considered. A solution based on a Public Land Mobile Network (PLMN) hosted multimedia streaming service is studied to avoid accessing through an external IP packet data network (IP-PDN) to streaming services. Under this scenario, the interaction(More)
Problem statement: Causal ordering is used in Mobile Distributed Systems (MDS) to reduce the non-determinism induced by four main aspects: host mobility, asynchronous execution, unpredictable communication delays and unreliable communication channels. Some causal protocols have been proposed for MDS. All of these protocols in order to ensure the causal(More)
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