scholarly journals Energy efficiency and quality of service optimization for constant bit rate real-time applications in 802.11 networks

2012 ◽  
Vol 14 (6) ◽  
pp. 583-595 ◽  
Author(s):  
Juan Jimenez ◽  
Rafael Estepa ◽  
Antonio Estepa ◽  
Francisco R. Rubio ◽  
Fabio Gómez-Estern
Keyword(s):  
Energy Efficiency ◽  
Quality Of Service ◽  
Real Time ◽  
Bit Rate ◽  
802.11 Networks ◽  
Constant Bit Rate ◽  
Real Time Applications ◽  
Service Optimization

Data Storage in Cloud Based Real-Time Environments

2011 ◽  
pp. 236-258
Author(s):  
Sai Narasimhamurthy ◽  
Malcolm Muggeridge ◽  
Stefan Waldschmidt ◽  
Fabio Checconi ◽  
Tommaso Cucinotta
Keyword(s):  
Quality Of Service ◽  
Real Time ◽  
Data Storage ◽  
Storage System ◽  
Cloud Environment ◽  
Last Mile ◽  
Service Oriented ◽  
Real Time Applications ◽  
Direct Applicability

The service oriented infrastructures for real-time applications (“real-time clouds1”) pose certain unique challenges for the data storage subsystem, which indeed is the “last mile” for all data accesses. Data storage subsystems typically used in regular enterprise environments have many limitations which impedes direct applicability for such clouds, particularly in their ability to provide Quality of Service (QoS) for applications. Provision of QoS within storage is possible through a deeper understanding of the behaviour of the storage system under a variety of conditions dictated by the application and the network infrastructure. We intend to arrive at a QoS mechanism for data storage keeping in view the important parameters that come into play for the storage subsystem in a soft real-time cloud environment.

Multicast of Multimedia Data

2008 ◽  
pp. 1781-1788
Author(s):  
Christos Bouras ◽  
Apostolos Gkamas ◽  
Dimitris Primpas ◽  
Kostas Stamos
Keyword(s):  
Quality Of Service ◽  
Real Time ◽  
Heterogeneous Network ◽  
Multimedia Data ◽  
The Other ◽  
The Internet ◽  
Service Guarantees ◽  
Tcp Friendly ◽  
Real Time Applications

The heterogeneous network environment that Internet provides to real time applications as well as the lack of sufficient QoS (Quality of Service) guarantees, many times forces applications to embody adaptation schemes in order to work efficiently. In addition, any application that transmits data over the Internet should have a friendly behaviour towards the other flows that coexist in today’s Internet and especially towards the TCP flows that comprise the majority of flows. We define as TCP friendly flow, a flow that consumes no more bandwidth than a TCP connection, which is traversing the same path with that flow (Pandhye 1999).

Multicast of Multimedia Data

2008 ◽  
pp. 316-322
Author(s):  
Christos Bouras ◽  
Apostolos Gkamas ◽  
Dimitris Primpas ◽  
Kostas Stamos
Keyword(s):  
Quality Of Service ◽  
Real Time ◽  
Heterogeneous Network ◽  
Multimedia Data ◽  
The Other ◽  
The Internet ◽  
Service Guarantees ◽  
Tcp Friendly ◽  
Real Time Applications

The heterogeneous network environment that Internet provides to real time applications as well as the lack of sufficient QoS (Quality of Service) guarantees, many times forces applications to embody adaptation schemes in order to work efficiently. In addition, any application that transmits data over the Internet should have a friendly behaviour towards the other flows that coexist in today’s Internet and especially towards the TCP flows that comprise the majority of flows. We define as TCP friendly flow, a flow that consumes no more bandwidth than a TCP connection, which is traversing the same path with that flow (Pandhye 1999).

scholarly journals ANALISIS PERFORMASI TRANSMISI VIDEO PADA JARINGAN MULTICAST DAN UNICAST DENGAN MENGGUNAKAN WLAN IEEE 802.11N

2020 ◽  
Vol 5 (2) ◽  
Author(s):  
Mutia Muliana ◽  
Rizal Munadi ◽  
Teuku Yuliar Arif
Keyword(s):  
Quality Of Service ◽  
Real Time ◽  
Video Streaming ◽  
Packet Loss ◽  
Bit Rate ◽  
User Datagram Protocol ◽  
Ieee 802.11N ◽  
Streaming Multicast

Abstrak— Perkembangan pemakaian internet semakin meluas khususnya dalam bidang jaringan. Saat ini orang berkomunikasi tidak hanya dengan suara maupun teks, tetapi juga secara visual maupu   n menggunakan video streaming. Penggunakan akses wireless sangat tinggi namun wilayah coverage wireless yang tersedia dalam satu gedung terbatas sehingga daya tangkap sinyal wireless berbeda  satu dengan yang lain. Penelitian ini bertujuan untuk menganalisis performasi multicast dan unicast  dengan melihat pengaruh bit rate dan terhadap kualitas layanan streaming menggunakan protocol Real Time Protocol (RTP) dan User Datagram Protocol (UDP). Pada peneletian menggunakan dua format video yang berbeda yaitu MPEG 4 dan H.264 dengan WLAN 802.11n menggunakan metode eksperimental untuk evaluasi kinerja dua protokol yang berbeda  dengan  parameter Quality of Service (Qos). Multicast bekerja dengan mengirim data  kepada  banyak  titik sekaligus dan unicast bekerja dengan mengirim data kepada satu client. Standar IEEE 802.11n digunakan untuk menguji performa wifi dalam mentransmisikan video streaming. Hasil dari penelitian menunjukkan dengan multicast menggunakan sebanyak 4 client yaitu mempertimbangkan QoS terbaik yaitu throughput tertinggi, delay terkecil dan packet loss minimum diusulkan penggunaan protokol RTP dengan format video MPEG 4 lebih baik pada sistem transmisi streaming secara Unicast.  Kata Kunci – Video Streaming, Multicast, Unicast,802.11n, QoS.

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