高速無線通信を含む多様なネットワークのための高速TCP/IPデータ転送技術の研究

早大学位記番号:新7791早稲田大

Seamless Multimedia Delivery Within a Heterogeneous Wireless Networks Environment: Are We There Yet?

The increasing popularity of live video streaming from mobile devices, such as Facebook Live, Instagram Stories, Snapchat, etc. pressurizes the network operators to increase the capacity of their networks. However, a simple increase in system capacity will not be enough without considering the provisioning of quality of experience (QoE) as the basis for network control, customer loyalty, and retention rate and thus increase in network operators revenue. As QoE is gaining strong momentum especially with increasing users' quality expectations, the focus is now on proposing innovative solutions to enable QoE when delivering video content over heterogeneous wireless networks. In this context, this paper presents an overview of multimedia delivery solutions, identifies the problems and provides a comprehensive classification of related state-of-the-art approaches following three key directions: 1) adaptation; 2) energy efficiency; and 3) multipath content delivery. Discussions, challenges, and open issues on the seamless multimedia provisioning faced by the current and next generation of wireless networks are also provided

Seamless multimedia delivery within a heterogeneous wireless networks environment: are we there yet?

The increasing popularity of live video streaming from mobile devices such as Facebook Live, Instagram Stories, Snapchat, etc. pressurises the network operators to increase the capacity of their networks. However, a simple increase in system capacity will not be enough without considering the provisioning of Quality of Experience (QoE) as the basis for network control, customer loyalty and retention rate and thus increase in network operators revenue. As QoE is gaining strong momentum especially with increasing users’ quality expectations, the focus is now on proposing innovative solutions to enable QoE when delivering video content over heterogeneous wireless networks. In this context, this paper presents an overview of multimedia delivery solutions, identifies the problems and provides a comprehensive classification of related state-of-the-art approaches following three key directions: adaptation, energy efficiency and multipath content delivery. Discussions, challenges and open issues on the seamless multimedia provisioning faced by the current and next generation of wireless networks are also provided

KINERJA TRANSMISSION CONTROL PROTOCOL (TCP) PADA JARINGAN WIRELESS DI PT.INDOSAT

Protocol TCP/IP pada awalnya dirancang untuk jaringan kabel sehingga performansinya pada jaringan kabel lebih bagus dibandingkan dengan pada jaringan tanpa kabel (wireless). Namun dengan semakin berkembangnya jaringan wireless mendorong para peneliti untuk mencari solusi bagaimana meningkatkan performansi TCP pada jaringan wireless. Dalam tesis ini diuraikan hasil studi dan analisis mengenai performansi beberapa jenis TCP yang sudah dikenal, dengan berdasarkan pada beberapa data indicator performansi seperti paket loss, delay dan throughput. Adapun data tersebut diambil dengan studi kasus pada jaringan wireless di PT Indosat di Palembang dengan mengambil beberapa sampel. Berdasarkan analisis data tersebut akhirnya disimpulkan bahwa dari beberapa jenis TCP, maka yang memberikan performansi paling bagus adalah TCP Sack yang merupakan singkatan dari TCP Selective Acknowledgment, di mana rata-rata prosentase perbaikan paket loss TCP Sack terhadap TCP lainnya adalah sebesar 3,74 % dan rata-rata prosentase perbaikan delay TCP Sack terhadap TCP lainnya adalah sebesar 2,43%.Kata kunci : Wireless wireless, TCP, kinerja, paket loss, delay, throughput

Performance Comparison of Dual Connectivity and Hard Handover for LTE-5G Tight Integration in mmWave Cellular Networks

MmWave communications are expected to play a major role in the Fifth generation of mobile networks. They offer a potential multi-gigabit throughput and an ultra-low radio latency, but at the same time suffer from high isotropic pathloss, and a coverage area much smaller than the one of LTE macrocells. In order to address these issues, highly directional beamforming and a very high-density deployment of mmWave base stations were proposed. This Thesis aims to improve the reliability and performance of the 5G network by studying its tight and seamless integration with the current LTE cellular network. In particular, the LTE base stations can provide a coverage layer for 5G mobile terminals, because they operate on microWave frequencies, which are less sensitive to blockage and have a lower pathloss. This document is a copy of the Master's Thesis carried out by Mr. Michele Polese under the supervision of Dr. Marco Mezzavilla and Prof. Michele Zorzi. It will propose an LTE-5G tight integration architecture, based on mobile terminals' dual connectivity to LTE and 5G radio access networks, and will evaluate which are the new network procedures that will be needed to support it. Moreover, this new architecture will be implemented in the ns-3 simulator, and a thorough simulation campaign will be conducted in order to evaluate its performance, with respect to the baseline of handover between LTE and 5G.Comment: Master's Thesis carried out by Mr. Michele Polese under the supervision of Dr. Marco Mezzavilla and Prof. Michele Zorz

Modeling and Simulation of Large Hybrid Networks

This paper describes a modeling and simulation framework for large hybridnetworks that include satellites, terrestrial wireless and mobile ad hocnetworks. The purpose of the simulation framework is to parallel the actualimplementation of a testbed network currently being constructed at ARL.The modeling framework uses the performance measures generated bythe simulation to analytically study larger scaled versions of thetestbed networks. The combination of the two methodologies allows thefeasibility of the testbed architecture's widespread implementation to bestudied without the associated costs of performing such experiments withactual equipment. Additionally, technological tradeoffs and interoperabilityissues can be studied so that informed decisions can be made about theimplementation of future military communication networks.This paper has been published in the Proceedings of 2nd Annual ATIRP Conference(ATIRP'99). </I