1 / 17

P2P Live Streaming Aware Access Point Design and Implementation

P2P Live Streaming Aware Access Point Design and Implementation. 指導教授： 李正帆 老師 組員： 陳 昱光 、 黃健瑋 、 黃志揚 余尚哲 、 許基傑 、 鄭漢中. Outline. Introduction Contribution Implementation in Embedded AP Efficient Filtering Signaling of PPStream Management Interface Q & A. Introduction.

naiara
Télécharger la présentation

P2P Live Streaming Aware Access Point Design and Implementation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. P2P Live Streaming Aware Access PointDesign and Implementation 指導教授： 李正帆老師 組員：陳昱光、黃健瑋、黃志揚 余尚哲、許基傑、鄭漢中

  2. Outline • Introduction • Contribution • Implementation in Embedded AP • Efficient Filtering • Signaling of PPStream • Management Interface • Q&A

  3. Introduction • P2P Live streaming is popular • Inefficient bandwidth utilization for P2P in WLANs • Smart transmission scheme • New architecture for P2P Live streaming in WLANs • We design and implement a P2P Live streaming aware AP for further improvement

  4. PPStream • Most famous NetTV application • Started from Jan 2006 • First supported VOD app • Variety of channel

  5. Implementation in Embedded AP • Asus WL-500g Premium Wireless AP • Embedded OS: Linux 2.4 (open source) • Workstation • OS: Ubuntu / Fedora • Laptop • P2Psoftware: PPStream

  6. Implementation of Embedded AP • Asus WL-500g Premium Wireless AP • Embedded OS: Linux 2.4 (open source) • Linux Kernel customized • Enable Loadable module support • Implement a kernel module to dynamically • Filtering frames • Get P2P Live streaming connection data Channel Name Peer IP Peer list

  7. Efficient Filtering • Not necessary to filter every packets(skb) • Necessary frames on necessary NICs • When the filtering function start? • Use event trigger to handler and maintains client state. • How to drop out offline client? • Linux build in connection tracking /proc/net/ip_conntrack, trace the timeout value.

  8. Efficient Filteringbased on different interfaces • skbdevname • eth1: WLAN • vlan0: LAN • vlan1: WAN • HTTP Action Notice  eth1(WLAN) • /net/core/dev.c • netif_receive_skb() • before bridge function • Received Peer List  vlan1(WAN)

  9. Efficient Filteringkernel hook function • Received Peer List  vlan1(WAN) • forwardRcv.hook = peerDataRcv; • forwardRcv.pf = PF_INET; • forwardRcv.hooknum = NF_IP_FORWARD; • forwardRcv.priority = NF_IP_PRI_FIRST; • nf_register_hook(&forwardRcv);

  10. Signaling of PPStream • Sent Action notice • Request Peer List • Communicate with Peer • Channel Start

  11. Signaling of PPStreamRequest of Channel • GET /action/notice.php?...cn=something… • Server: 210.51.188.91 • TCP packet

  12. Signaling of PPStream HTTP Get /action/notice.php UDP Received Peer List UDP Communicate with Peer Channel Name in urlencode format

  13. Signaling of PPStreamReceive Peer List 22hex  32dec 32 peer in list. Peer IP & Port UDP Communicate with Peer

  14. Management InterfaceClient tracking

  15. Management InterfacePeer tracking

  16. Question and Answer

  17. Thanks You

More Related