Path Schedulers Performance on Cellular/Wi-Fi Multipath Video Streaming

Internet traffic nowadays is predominantly composed by video streaming. Moreover, most video streaming traffic is carried over Hypertext Transfer Protocol/Transmission Control Protocol (HTTP/TCP). Understanding TCP stack performance in transporting video streams has become paramount, specially in face of recent multipath transport protocol evolutions and multiple client device interfaces available. In this paper, we characterize path schedulers performance of streaming of video sessions over cellular and Wi-Fi access networks, the two most common and dominant wireless technologies in the market. We use network performance level as well as video quality level metrics to characterize multiple path schedulers and resulting network and application layers’ interactions.Thirteenth International Conference on Evolving Internet (INTERNET 2021), 18-22, July, 2021, Nice, Franc

Managing Path Switching in Multipath Video Streaming

Video streaming has become the major source of Internet traffic nowadays. Considering that content delivery network providers utilize Video over Hypertext Transfer Protocol/Transmission Control Protocol (HTTP/TCP) as the preferred protocol stack for video streaming, understanding TCP performance in transporting video streams has become paramount. Recently, multipath transport protocols have allowed video streaming over multiple paths to become a reality. In this paper, we analyze the impact of path switching on multipath video streaming and network performance, and propose new schedulers which minimize the number of path switching. We utilize network performance measures, as well as video quality metrics, to characterize the performance and interaction between network and application layers of video streams for various network scenarios.The Eleventh International Conference on Evolving Internet (INTERNET 2019), June 30 to July 04, 2019, Rome, Ital

Handoff Characterization of Multipath Video Streaming

Video streaming has become the major source of Internet traffic nowadays. Considering that content delivery network providers utilize Video over Hypertext Transfer Protocol/ Transmission Control Protocol (HTTP/TCP) as the preferred protocol stack for video streaming, understanding TCP performance in transporting video streams has become paramount. Recently, multipath transport protocols have allowed streaming of video over multiple paths. In this paper, we analyze the impact of handoffs on multipath video streaming and network performance on WiFi and cellular paths. We utilize network performance measures, as well as video quality metrics, to characterize the performance and interaction between network and application layers of video data for various network scenarios.Twelfth International Conference on Evolving Internet (INTERNET 2020), October 18-22, 2020, Porto, Portuga

CORPS - A Pipelined Fair Packet Scheduler for High Speed Switches

Input queues have become an attractive switch architecture, since it was shown that throughput up to 100% is achievable when Virtual Output Queue (VOQ) is used. Although schedulers for VOQ switches have been proposed, pipelined schedulers, whose processing requirements increase at most linearly with line speeds, have not yet matured. In this document, we introduce CORPS, a Pipelined Scheduler which allows fair scheduling among input lines of a crossbar high speed switch fabric. By means of a round-robin communication scheme, CORPS achieves scalability to a large number of ports. Moreover, CORPS achieves one scheduling decision per line per slot, by scheduling packets into future slots. The tradeoffs involved are packet delay and utilization

PASS Middleware for Distributed and Autonomous XML Message Processing

Basic message processing tasks, such as wellformedness checking and grammar validation, can be off-loaded from the service providers ’ own infrastructures. To enable effective off-loading of processing tasks, we introduce the Prefix Automata SyStem- PASS, a middleware architecture which distributively processes XML payloads of web service SOAP messages during their routing towards Web servers. PASS is based on a network of automata, where PASS-nodes independently but cooperatively process parts of the SOAP message XML payload. 1 Motivation and Related Work We propose a novel lightweight middleware architecture called “Prefix Automata SyStem (PASS) ” for distributed XML document processing. As depicted in Figure 1(a), services provided by PASS middleware lie beneath high level web service execution tasks (including service composition, business application execution, and data access) and above the traditional and/or intelligent network routing. PASS enables distributed processing of the web service request and reply documents within the public network itself, before they even arrive at their destinations (Figure 1(b)). In particular, PASS-enabled cooperating network nodes listen to SOAP request/reply messages that pass through and perform basic XML document processing on their payloads. Processing performed at PASS cooperating network nodes of the PASS middleware are: nonblocking; non-wasteful; autonomous. PASS middleware allows pipelined in-network processing of SOAP messages. Pipelining allows different pieces of a large XML document to be processed by various PASS nodes in tandem or simultaneously. To enable such autonomous and pipelined processing of XML documents, unlike most existing work in communicating automata [3, 7, 2, 6], PASS middleware relies on the prefix nature [8] of basic XML processing tasks.

WiMAX Services over Transport Networks

Abstract- The merging of long-haul carriers with wireless operators signals significant changes in telecommunications services in the US. Wireless access is likely to become ubiquitous, while efficient fiber based transport provides the necessary bandwidth for aggregated traffic transport. Recently, WiMAX wireless technology had been tried out in places across the world. WiMAX technology promises a quick and cheap deployment of broadband and voice services over a non-line-of-sight wireless channel. In addition, WiMax radios probe the air channel so as to dynamically adapt to atmospheric conditions. This paper addresses the provisioning of voice and data services over a combined WiMAX/optical network. We address issues such as wireless channel call blocking of voice services and transport bandwidth provisioning schemes vis-a-vis packet loss performance of a wireless/transport network