dynamic media streaming over wireless and ip networks


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Dynamic media streaming over wireless and IP networks

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  • User experience = fast playback response, minimal playback stalls, highest quality media rate for current network conditionsCongestion is network operator challeng
  • dynamic media streaming over wireless and ip networks

    1. 1. BY: Naveen Dubey ME(ECE)-Modular 2012 121614
    2. 2. Internet and Wireless  IEEE 802.11  Real Time Transport protocols   HTTP  HTTP-DASH Mobile IP  Problem Statement  Related work  Proposal   Dynamic media transport.  Experimental Results
    3. 3.  Today’s mobile market is exploding, and the demand for high-quality online media has never been greater.  Due to introduction of iPhone, iPad, iPod Touch, Android and all other mobile devices in market.  The challenges  Mobile users expect high quality video experience  Network operators need to offer quality experience affordably
    4. 4.  Due to the increasing number of portable consumer electronic devices , today’s internet path include at least one wireless segment.  Predominant architectures are IEEE802.11 as well as 3G/4G networks.
    5. 5. Mobile Internet Access Internet Subscribers (millions) 1400 1200 1000 800 600 400 200 0 Source: Ericsson Fixed Mobile Year
    6. 6. CISCO-VNI 39 times growth of mobile data 66% mobile video by 2014 Source: Cisco White Paper: Cisco Visual NetworkingIndex: Global Mobile Data Traffic Forecast Update, 2009-2014 Figure 2
    7. 7.    IEEE 802.11 is a set of media access control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (WLAN) computer communication in the 2.4, 3.6, 5 and60 GHz frequency bands. The base version of the standard was released in 1997. The standard and amendments provide the basis for wireless network products using the Wi-Fi brand.  Recent Standard: IEEE802.11-2012: This revision specifies technical corrections and clarifications to IEEE Std 802.11 for wireless local area networks (WLANS) as well as enhancements to the existing medium access control (MAC) and physical layer (PHY) functions. (including all amendments since 2008-2011)
    8. 8.  Real Time Transport Protocol (RTP) defines a standardized packet format for delivering audio and video over IP networks.  RTP is used extensively in communication and entertainment systems that involve streaming media, such as telephony, video teleconference applications, television services and web-based push-to-talk features.  One of the design considerations of RTP was to carry a range of multimedia formats (such as H.264, MPEG4, MJPEG, MPEG, etc.) and allow new formats to be added without revising the RTP standard.
    9. 9.  The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypermedia information systems. (RFC-2616)  The rules governing the conversation between a Web client and a Web server
    10. 10. An HTTP conversation Client  I would like to open a connection Server OK  Send page or error message    OK GET <file location> Display response  Close connection  HTTP is the set of rules governing the format and content of the conversation between a Web client and server It is an application layer protocol.
    11. 11.  Dynamic Adaptive Streaming over HTTP (DASH), also known as MPEG-DASH, enables high quality streaming of media content over the Internet delivered from conventional HTTP web servers. Similar to Apple's HTTP Live Streaming (HLS) solution.
    12. 12. Segment DASH Client Media Presentation Description DASH Control Engine Resources located by HTTP-URLs HTTP/1.1 on-time http requests to segments HTTP Access Client Media Engines 12
    13. 13.   A protocol enhancements that allow transparent routing of IP datagram's to mobile nodes in the Internet. Each mobile node is always identified by its home address, regardless of its current point of attachment to the Internet. While situated away from its home. [RFC- 2002]   A mobile node is associated with a care-of address, which provides information about its current point of attachment to the Internet. The home agent sends datagram's destined for the mobile node through a tunnel to the care- of address. After arriving at the end of the tunnel, each datagram is then delivered to the mobile
    14. 14. LMA- Local mobility anchor MAG- Mobile access Gateway CN: Correspondent Network
    15. 15. Manuel Gorius, Yongto Shuai, Thorsten Herfet “Dynamic media streaming over wireless and mobile IP Networks”, ICCEBerlin,2012
    16. 16.  The internet protocol hides heterogeneity of network from upper layers such that the transport protocol is subject to highly variable state. The reliable transport protocol suffer from throughput variation on wireless network, which introduce packet corruption and packet loss. Consequently the available bandwidth is frequently underutilized. This inefficiency is limiting factor for the deployment of High definition media.
    17. 17.  As TCP/Http is today’s de facto standard for internet media streaming. However, Internet TV solutions based on HTTP are limited in their quality due to numerous drawbacks of transport protocols on wireless networks.  To avoid physical packet loss into wireless mobile standards the protocols rely on H-ARQ is implemented.  But due to limited number of transmission retires, the transport protocol is still exposed to small percentage of residual packet loss.
    18. 18.  Related work in this field commonly builds upon dynamic streaming, packet scheduling and source rate adjustment of media streams, as well as partial reliability on transport layer.  Recent development in dynamic HTTP streams try to address the issue of media streaming under congestion control by offering the video stream in multiple resolution at server.
    19. 19.  Dynamic adaptive streaming over HTTP (HTTP-DASH) is in its standardization process.  A stream switching scheme similar to DASH has been developed by De cicco.
    20. 20.  A dynamic streaming architecture based on a novel transport protocol – Predictably Reliable Real-time Transport (PART) has been proposed.  The protocol operates under rate based congestion control. In contrast to window based congestion control.  It sends datagram of a continuous media stream proactively according to the rate estimate of a congestion control equation.
    21. 21.  It is a self-managing dynamic streaming architecture based on three essential components.. Proactive packet scheduling under an estimate of the available network bandwidth. Predictably reliable transport fulfils the QOS requirements of high data rate, real time media streaming applications on unmanaged Internet paths. Delay-based congestion control returns a stable and continuous estimate of the available bandwidth.
    22. 22. Fig: Dynamic streaming architecture based on the PRRT protocol. PLR- Packet loss rate , RTT- Round trip time.
    23. 23.  Network Simulator used for experiment: Netem emulator. Experiment-1: Considerations: 1. 2. 3. Evaluation of the response of TCP and PRRT to wireless packet loss . HSDPA network with physical layer throughput of 7.2 Mbps. PLR increased stepwise from 0% to 1%
    24. 24. Considerations: 1.Evaluation of video bit rate while sending a video file via DASH and via PRRT. 2. Experiment Carried out on HSDPA network. 3. Two adaption set considered. A. 2,3,4,5 and 6 Mbps B. 0.8,1.5,2.5 Mbps 4. The mobile client observes a base RTT of 95 ms.
    25. 25. Considerations: 1. Replace mobile network by IEEE802.11 2. The receiver placed at distance of 7m to the Access point with two wall between the direct path. 3. The Ap of the wireless additionally introduces extensive queuing delay.
    26. 26.  As evidenced by the above experiments, TCPbased media streaming suffers significantly on wireless IP networks due to TCP’s throughput variations.  The presented dynamic streaming architecture therefore implements media transport based on PRRT, which implements efficient, predictably reliable error control and proactive transport for optimal utilization of the available bandwidth on wireless and mobile Internet paths.
    27. 27. Manuel Gorius, Yongato Shuai, Thorsten Herfet “Dyanmic media srteaming over wireless and mobile IP Networks”, ICCE-Berlin, 2012  Naveen Dubey , Sunil Yadav , Anupam Saini “ Mobile IP based intelligent home”, International Conference ICETDSMT-2013,March 11-12 ,2013 ,PP 241245, ISBN: 978-93-83083-28-5 RFC’s & Web  Cisco VNI forecast : http:/bit.ly/bwGYL  http://www.ericsson.com/res/docs/2013/ericsson-mobilityreport-june-2012.pdf  http://www.ietf.org/rfc/rfc2616.txt  http://www.ietf.org/rfc/rfc2002.txt  http://tools.ietf.org/html/rfc2794 