U.S.-Egypt Cooperative Research: Redundant Traffic Encoding and Marking Scheme for Voice-Over-IP Quality-of-Service

描述：该奖项旨在支持马萨诸塞州达特茅斯大学计算机与信息科学系Emad Aboelela博士与埃及亚历山大大学工程学院计算机科学与自动控制系Nazih El-Derini博士之间的一项合作研究。pi将研究冗余流量编码和标记，以实现互联网语音协议的服务质量。VoIP （VoIP）是一种通过IP网络（如全球互联网）传输语音业务的技术。该项目的目标是：1。通过模拟和实际实现美国研究实验室与埃及研究实验室之间的VoIP连接，确定导致语音质量差的方面。通过生成冗余流作为原始语音流的副本来增加接收方替换丢失或延迟的数据包的可能性。3. 通过对冗余流使用低比特率语音编码技术来降低所提出的QoS方案的开销。4. 减少原始和冗余语音流中相同语音内容丢失或延迟的概率。5. 通过提供分组排序技术，允许接收方从原始流或重复流中重新组装发出的语音流。该解决方案主要在终端主机上实现，只需对Internet的基础结构进行最小的更改即可支持该解决方案。初步实验表明，该方法具有较低的开销。在Internet社区，研究和开发一直致力于为实时多媒体流（包括语音）的传输强制执行可接受的QoS，无论是在大学还是主要的公司和政府实验室，但目标仍然难以实现。QoS方案可以分类为资源保留或优先级，可能还包括流量工程。通过应用各种语音编码算法和利用不同的流量工程技术，pi计划采用创新方案来提高VoIP质量。范围和更广泛的影响：基于ip的服务的增长是爆炸性的，预计这个市场将在未来几年继续以更高的速度增长。最近的行业趋势表明，多媒体具有广泛应用的潜力。通过引入新的服务和应用，VoIP提供了获得竞争优势的潜力。拟议中的项目将为埃及和美国的研究界以及私营部门之间的未来研究和合作奠定基础。该项目的结果将在项目网站上公布，以便在研究、教育和私营部门社区以及科学期刊上广泛传播。该项目得到了美国-埃及联合基金项目的支持，该项目向两国的科学家和工程师提供赠款，以开展这些合作活动。

0413728AboelelaDescription: This award is to support a cooperative research between Dr. Emad Aboelela, Department of Computer and Information Science, University of Massachusetts, Dartmouth, Massachusetts and Dr. Nazih El-Derini, Department of Computer Science and Automatic Control, Faculty of Engineering, University of Alexandria, Alexandria, Egypt. The PIs will study redundant traffic encoding and marking for Voice over Internet Protocol Quality -of-Service. (VoIP) enables voice traffic to be carried over an IP network such as the global Internet. The objectives of the project are: 1. to identify the aspects that lead to poor voice quality through simulation and real implementation of VoIP connection between the research lab in the US and its counterpart in Egypt. 2. to increase the likelihood of a receiver to replace lost or delayed packets through generating a redundant stream as a duplicate of the original voice stream. 3. to decrease the overhead of the proposed QoS scheme through utilizing a low-bit-rate speech encoding technique for the redundant stream. 4. to decrease the probability that the same speech content gets lost, or delayed, from both the original and redundant voice streams. 5. to allow the receiver to reassemble the sent voice stream from either the original stream or duplicate stream through providing a packet sequencing technique. The solution is to be implemented mainly at the end hosts and can be supported with minimal changes to the infrastructure of the Internet. Preliminary experiments show that the proposed approach has relatively low overhead. In the Internet community, research and development has been devoted to enforce an acceptable QoS for the transmission of real-time multimedia streams (including voice), both at universities and major corporate and government laboratories, but the goal is still elusive. The QoS schemes can be categorized as resource reservation or prioritization, possibly along with traffic engineering. The PIs plan an innovative scheme to improve VoIP quality through applying various speech-encoding algorithms and utilizing different traffic engineering techniques. Scope and broader impacts: The growth in IP-based services has been explosive, and it is projected that this market will continue to grow at an even higher rate for several years to come. Recent industry trends show that multimedia holds the potential for a wide range of applications. VoIP offers the potential to gain competitive advantage through the introduction of new services and application. The proposed project will create foundations for future research and collaboration between the research communities as well as the private sectors in Egypt and the US. The results of the project will be published in the project website to reach broad audiences in the research, educational, and private sector communities as well as in scientific journals. This project is being supported under the US-Egypt Joint Fund Program, which provides grants to scientists and engineers in both countries to carry out these cooperative activities.