CAREER: Internet Telephony Services and Mobile Multimedia Services

建议的研究项目集中在互联网电话和新的ad-hoc数据分发技术。 在互联网电话研究领域，研究建议重点关注以下主题： 编程互联网电话服务：该研究提出了新的机制编程互联网电话服务，最终用户和服务提供商都可以使用。 这些机制被设计为健壮的，提供可预测的性能，并允许大量用户安全地共享服务器资源。编程设施将得到加强，为互联网电话提供图形服务创建环境。 功能交互：这项研究计划调查的问题，功能互动在互联网电话，功能互动的问题显着不同，从传统的电话。 协作呼叫过滤：该研究计划设计，实施和分析一个系统，允许互联网用户合作过滤不受欢迎的电话，根据群体偏好。 这避免了目前对未列出的电话号码和电话答录机的依赖。 扩展资源预留：特别是对于大量的小流量预期forInternet电话，与他们严格的延迟和损失的要求，缩放资源预留是至关重要的。 研究提出了两种新的扩展机制，Sink-tree预留作为边界网关预留协议（BGRP）的一部分和部分预留的性能。 性能预测：该研究计划调查简单的统计特性，预测各种标准的前向纠错和播放延迟算法的分组语音的性能。 911服务：与现有机制相比，互联网电话提供了显著增强紧急呼叫服务的机会。 该研究计划调查如何可靠地识别用户，并向医务人员授予临时访问个人数据的权限，而不必将医疗数据存储在集中的位置。 行动力：该研究建议调查应用层的移动性机制，以补充传统的IP层的移动性，可能提供更高的安全性和更快的切换，与nonetwork基础设施的修改。 此外，该研究提出了一种新的数据和媒体分发系统e*meme，它允许数据在网络节点仅偶尔连接到广域网的ad-hoc网络中传播，就像无线连接不稳定的地区一样。 该研究计划调查有效的，基于流行的缓存复制算法，考虑到特定的applicationsof功率和存储有限的移动的计算机。

The proposed research project is focused on Internet telephony and novel ad-hoc data distributiontechniques. In the area of Internet telephony research, the research proposes to focus on the following topics: Programming Internet telephony services: The research proposes new mechanisms for programming In-ternet telephony services, usable by both end users and service providers. The mechanismsare designed to be robust, offer predictable performance and allow a large set of users tosafely share server resources. The programming facilities are to be enhanced with a graphicalservice creation environment for Internet telephony. Feature interaction: The research plans to investigate the problem of feature interaction in Internet telephony, as the feature interaction problem differs significantly from that encountered in traditionaltelephony. Collaborative call filtering: The research plans to design, implement and analyze a system that allows Internet users to collaborate in filtering undesirable calls, based on group preferences. Thisavoids the current reliance on unlisted phone numbers and answering machines for call filtering. Scaling Resource Reservation: Particularly for the large number of small flows anticipated forInternet telephony, associated with their stringent delay and loss requirements, scaling resourcereservations is of vital importance. The research proposes to investigate the performance of twonew scaling mechanisms, sink-tree reservations as part of the Border Gateway ReservationProtocol (BGRP) and partial reservations. Performance prediction: The research plans to investigate simple statistical characterizations that predictthe performance of a variety of standard forward error correction and playout delay algorithmsfor packet voice. 911 services: Internet telephony offers the opportunity to significantly enhance emergency callservices compared to existing mechanisms. The research plans to investigate how to reliably identifyusers and grant temporary access to personal data to medical personnel, without having tostore medical data in centralized locations. Mobility: The research proposes to investigate application-layer mobility mechanisms to complement traditional IP-layer mobility, potentially affording greater security and faster hand-off, with nonetwork infrastructure modifications required. In addition, the research proposes a new data and media distribution system, e*meme, that allows data topropagate in ad-hoc networks where network nodes are only sporadically connected to the wide-areanetwork, as is the case in areas where wireless connectivity is spotty. The research plans to investigateefficient, popularity-based cache replication algorithms, taking into account the particular considerationsof power- and storage-limited mobile computers.