1. Cellular Vs wLAN Debate
Sridhar Komandur

2. Are cellular networks & wLANs Complimentary or competitive ?
To paraphrase the topic:
Are cellular networks & wLANs
Complimentary or competitive ?

3. Why Is wLAN Public Networks (Wi-Fi) Catching on ?
Delays in 3G technology and service offerings
Enabling Wi-Fi enterprise momentum to extend to 2.5G/3G networks (wWAN)

4. Why Is wLAN Public Networks (Wi-Fi) Catching on ? (Cont)
Wi-Fi technology aspects
Higher speed (~7 to 20mbps)
Low cost to subscribers
Ease of use (all IP)
Low capEx
Emergence of dual mode Wi-Fi/GPRS PC cards

5. Why Is wLAN Public Networks (Wi-Fi) Catching on ? (Cont)
Enterprise leverage
Strong adoption by enterprise market
Increasing adoption by “home networking market”

6. Wi-Fi Limitations
Wi-Fi cells must be isolated from each other
Difficult cell planning, no hand-offs
Cell adjacency was not a design criterion
Too many cross channel interference problems

7. Wi-Fi Limitations (Cont)
Unlicensed spectrum causes resource competition
Availability, Bandwidth and QoS are unknown

8. Wi-Fi Limitations (Cont)
Spatially growing capacity can be difficult
Interference limits Wi-Fi cells to 0.5 km radius
Power emission regulations may limit growth

9. Summary …
Wi-Fi is limited for ubiquitous deployment and
Integration of Wi-FI and GPRS/UMTS is required

10. Wi-Fi/Cellular Integration Needs
Service transparency
Guaranteed service availability (at & beyond hot spots)
Speed, performance, and guaranteed service

11. Wi-Fi/Cellular Integration Needs (Cont)
Security
Enterprise grade Authorization & authentication
OTA privacy
Seamless handoff and mobility

12. Wi-Fi/Cellular Integration Needs (Cont)
One bill, lower bill
Best available speed over diverse access
Service package : ISP, ASP, Access, voice
Like voice, businesses will pay for wireless data