IEEE 802.11s implementation for multimedia campus networking

1. IEEE 802.11s implementation for multimedia campus networking Aparna Anand,Arunabh Mishra, Atul Dwivedy Sikkim Manipal Institute Of Technolgy

2. Why, What ,How?

3. Wireless Mesh NetworksIEEE 802.11s WMN is dynamically self-organized and self configured. Researches have been going on to establish protocol for mesh networking using current technologies such as IEEE 802.11, IEEE 802.15 and 802.16

4. Classical 802.11 WLAN

5. WLAN with mesh

6. Why Mesh? What’s so good about Mesh? – Enables rapid deployment with lower-cost backhaul – Easy to provide coverage in hard-to-wire areas – Self-healing, resilient, extensible – Under the right circumstances: – Greater range due to multi-hop forwarding – Higher bandwidth due to shorter hops – Better battery life due to lower power transmission

7. Modes Of WMN • Infrastructure/backbone WMN • Client WMN • Hybrid WMN

8. Infrastructure/Backbone WMNs

9. Client WMNs

10. Hybrid WMNs

11. Comparison with existing technologies

12. Mesh vs. Ad-Hoc Networks WMN Ad-Hoc Networks • Multihop • Nodes are wireless, possibly mobile • May rely on infrastructure • Most traffic is user-to-user • Multihop • Nodes are wireless, • some mobile, some fixed • It relies on infrastructure • Most traffic is user-to-gateway

13. Mesh vs. Sensor Networks Wireless Sensor Networks WMN • Bandwidth is generous (>1Mbps) • Some nodes mobile, some fixed • Normally not energy limited • Resources are not an issue • Most traffic is user-to-gateway • Bandwidth is limited (tens of kbps) • In most applications, fixed nodes • Energy efficiency is an issue • Resource constrained • Most traffic is user-to-gateway

14. Wiring Costs High Low Very Good Bandwidth Good Number of APs As needed Twice as many Low Cost of APs High WLAN Coverage 802.11 WMN

15. Mesh Implementation Model Different factors affecting a wireless transmission rate for a mesh network. 1) Marginal S/N 2) Long bursts of interference due devices working in same spectrum. eg microwave 3) Short bursts of interference due to concurrent sends from other routers 4) Multipath interference.

16. Marginal S/N • Simplified model for packet loss: • P(delivery) = f(signal/noise) • Signal strength reflects attenuation • Noise reflects interference • Perhaps marginal S/N explains intermediate delivery probabilities

17. Long bursts of interference A B Bursty noise might corrupt packets without affecting S/N measurements

18. Short bursts of interference (802.11) A B Outcome depends on relative signal levels When a nearby AP sends a packet, we lose a packet.

19. Multi-path interference B B A Reflection is a delayed and attenuated copy of the signal

20. SOFTWARE & HARDWAREDEVELOPMENT

21. HARDWARE DEVELOPMENT

22. HORN ANTENNA

23. PARABOLIC REFLECTOR • A parabolic reflector (or dish or mirror) is a parabola-shaped reflective device, used to collect or distribute energy such as light, sound, or radio waves

24. CAT5 CABLE

25. i Pod Touch

26. Wireless Settings For iPod

27. WIRELESS ROUTER

28. What is a router? • A router is a computer whose software and hardware are usually tailored to the tasks of routing and forwarding, generally containing a specialized operating system RAM, NVRAM, flash memory, and one or more processors.

29. LINKSYS WRT54G

31. WRT54G Series Router Specification

32. LINKSYS WRT54GL version 1.1 • Linux Kernel 2.4 • Based on the Broadcom BCM5352E SoC • Hardware design is the WRT54G Version 4.0 • All-in-one Internet-sharing Router, 4-port Switch, and 54Mbps Wireless-G (802.11g) Access Point • Shares a single Internet connection and other resources with Ethernet wired and Wireless-G and -B devices • Push button setup feature makes wireless configuration secure and simple

34. Software Requirements 1. MS WINDOWS 2. LINUX—UBUNTU GUTSY RIBBON 2.0 CONFIGURING UBUNTU 2.1 TCP DUMP 2.2 NDISWRAPPER 2.3 WI FI RADAR 2.4 WIRELESS TOOLS MATLAB & SIMULINK SOFTWARES : -NETSTUMBLER • NETMEETING • SKYPE • PRTG TRAFFIC MONITOR • NETSCAN • ANGRY IP

35. MS WINDOWS

36. LINUX—UBUNTU GUTSY RIBBON

37. WI FI RADAR

38. DEVELOPMENT PLATFORMMATLAB AND SIMULINK

39. What is VoIP? Voice over IP – Video over IP – not limited to voice/video – “any data” over IP How does it work: – VoIP is the process of breaking up data into small chunks (packets), transmitting those chunks over an IP network and reassembling those chunks at the receiving end Receiver handles packet loss, packet delay, and wrong order of packets

40. VoIP Protocols 1. Transport Protocols RTP: Real-Time Protocolpayload can be any “multimedia” data defined by additional protocols and codecs RTCP: Real-Time Control Protocol 2. Call-Signalling Protocols SIP: Session Initiation Protocol H.323 3. Proprietary Protocols Skype (P2P-based)

41. Why VoIP? • provides the opportunity to bring significant change in the way people communicate • apart from email and Web, VoIP is the “killer application” for wireless networks

42. VoIP Services • Telephony • Video Conferencing • Instant Messaging • Application Sharing • Whiteboarding • etc.

43. Microsoft Windows Netmeeting

47. TRAFFIC MONITORING

48. PRTG Traffic Grapher • It is an easy to use Windows software for monitoring and classifying bandwidth usage. It provides system administrators with live readings and long-term usage trends for their network devices.

49. TRAFFIC MONITORING GRAPH-1 The traffic monitoring system was also tested for wired LAN system existing in campus using PRTG network monitor software

50. TRAFFIC MONITORING GRAPH-2