18-07-2011, 10:04 AM
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Introduction & Technology
Cellular Technology & Evolution
3G & Wi-Fi
3G,refers to collection of 3rd generation mobile technologies
Wi-Fi, refers to 802.11b wireless Ethernet standards to support wireless LANs
3G
Technology for mobile service providers
Use licensed spectrum to provide wireless telephone coverage
Base station support up to several kilometers
Support higher bandwidth digital communications
Data rates from 384Kbs up to 2Mbps
Wi-Fi
Wi-Fi is popular name for wireless Ethernet 802.11b
Operate using unlicensed spectrum in the 2.4Ghz band
Base station support within few feet
Data rate up to 11 Mbps
Wi-Fi comes out from data communication industry(LANs) which is bi-product of the computer industry
WLAN Technologies/Protocols
IEEE 802.11 ( b, g & a) --Wi-Fi
IEEE 802.16 (a) -- Wi -Max or Wider – Fi
Wi-MAX (Worldwide Interoperability for Microwave Access) provides fixed & mobile internet access
IEEE 802.20 -- Mobile – Fi
Mobile Broadband Wireless Access (MBWA) or IEEE 802.20 is mobile broadband wireless networks, nicknamed as Mobile-Fi, it is low cost
IEEE 802.11 Specs. (Wi-Fi)
Comparisons
Comparisons: 3G vs. Wi-Fi
Comparisons: 3G vs. Wi-Max
Comparisons: 3G vs. Mobile-Fi
How is 3G & Wi-Fi same
Both are wireless
Both are access technologies
Both offer Broadband data service
Both are wireless
Avoids need to install cables
Facilities mobility
The ability to move devices
The ability to stay continuously connected to wider serving area
3G offers much narrower bandwidth but wider covering area & more support for rapid movement b/w base stations
Wi-Fi covers wide area but in local area with one or few base stations which is managed as a separate WLAN
Both are access technology
Both 3G & Wi-Fi are access or edge/network technologies
For 3G, the wireless page link is up to a few kilometers & then dedicated wire line facilities to interconnected base station & ultimately to the internet cloud
For Wi-Fi, the wireless page link is a few hundred feet from the user device to the base station, the base station is connected into the wire line LAN
Both offer broadband data storage
3G & Wi-Fi support broadband data service
The data rate offered by Wi-Fi(11Mbps) is higher than the couple of hundred Kbps expected from 3G
Both offer sufficient bandwidth to support services like real time voice, data and streaming media
How they are different
Spectrum policy and management
Status of technology development different
Development status
Embedded support
Standardization
business model
Spectrum policy & management
This is key distinction between 3G & Wi-Fi
This has important implications for
Cost of service
Quality of service(QOS)congestion management
Industry structure
The licensed spectrum used by 3G is protected from interference from other service
Wi-Fi is unlicensed & hence imposes strict power limits on other users and also interference from other service.
Status of tech development
DEVELOPMENT STATUS
EMBEDDED SUPPORT FOR SERVICES
STANDARDIZATION
SERVICE/BUSSINESS MODEL
DEVELOPMENT STATUS
3G is used in market at a higher cost because of license, hence it has limited progress
In contrast, Wi-Fi networking is rapidly growing
EMBEDDED SUPPORT SERVICE
3G was designed as upgraded technology for wireless voice service
Wi-Fi provides lower service for voice telephony and provides upgraded technology for data communication
Hence the potential advantage of 3G over Wi-Fi is that 3G offers better support for secure/private communication than Wi-Fi
STANDARDIZTION
For 3G there is relatively a small family of internationally sanctioned standards, i.e., referred as WCDMA(Wideband Code Division Multiple Access)
Wi-Fi is one of the families of continuously evolving 802.11* wireless Ethernet standards.
The standards picture for WLANs is not clear as 3G
SERVICE/BUSSINESS MODEL
3G is more developed than Wi-Fi as a business and service model
3G represents the extension of the existing service provider industry to new services
In contrast, Wi-Fi is more developed with respect to the supplier market, at least w.r.t. WLAN equipment
Future
IN FUTURE
Both Technologies are likely to succeed in the market
We expect 3G mobile providers to integrate Wi-Fi tech into their network
We expect Wi-Fi to offer competition to 3G providers because of the lower cost
Introduction & Technology
Cellular Technology & Evolution
3G & Wi-Fi
3G,refers to collection of 3rd generation mobile technologies
Wi-Fi, refers to 802.11b wireless Ethernet standards to support wireless LANs
3G
Technology for mobile service providers
Use licensed spectrum to provide wireless telephone coverage
Base station support up to several kilometers
Support higher bandwidth digital communications
Data rates from 384Kbs up to 2Mbps
Wi-Fi
Wi-Fi is popular name for wireless Ethernet 802.11b
Operate using unlicensed spectrum in the 2.4Ghz band
Base station support within few feet
Data rate up to 11 Mbps
Wi-Fi comes out from data communication industry(LANs) which is bi-product of the computer industry
WLAN Technologies/Protocols
IEEE 802.11 ( b, g & a) --Wi-Fi
IEEE 802.16 (a) -- Wi -Max or Wider – Fi
Wi-MAX (Worldwide Interoperability for Microwave Access) provides fixed & mobile internet access
IEEE 802.20 -- Mobile – Fi
Mobile Broadband Wireless Access (MBWA) or IEEE 802.20 is mobile broadband wireless networks, nicknamed as Mobile-Fi, it is low cost
IEEE 802.11 Specs. (Wi-Fi)
Comparisons
Comparisons: 3G vs. Wi-Fi
Comparisons: 3G vs. Wi-Max
Comparisons: 3G vs. Mobile-Fi
How is 3G & Wi-Fi same
Both are wireless
Both are access technologies
Both offer Broadband data service
Both are wireless
Avoids need to install cables
Facilities mobility
The ability to move devices
The ability to stay continuously connected to wider serving area
3G offers much narrower bandwidth but wider covering area & more support for rapid movement b/w base stations
Wi-Fi covers wide area but in local area with one or few base stations which is managed as a separate WLAN
Both are access technology
Both 3G & Wi-Fi are access or edge/network technologies
For 3G, the wireless page link is up to a few kilometers & then dedicated wire line facilities to interconnected base station & ultimately to the internet cloud
For Wi-Fi, the wireless page link is a few hundred feet from the user device to the base station, the base station is connected into the wire line LAN
Both offer broadband data storage
3G & Wi-Fi support broadband data service
The data rate offered by Wi-Fi(11Mbps) is higher than the couple of hundred Kbps expected from 3G
Both offer sufficient bandwidth to support services like real time voice, data and streaming media
How they are different
Spectrum policy and management
Status of technology development different
Development status
Embedded support
Standardization
business model
Spectrum policy & management
This is key distinction between 3G & Wi-Fi
This has important implications for
Cost of service
Quality of service(QOS)congestion management
Industry structure
The licensed spectrum used by 3G is protected from interference from other service
Wi-Fi is unlicensed & hence imposes strict power limits on other users and also interference from other service.
Status of tech development
DEVELOPMENT STATUS
EMBEDDED SUPPORT FOR SERVICES
STANDARDIZATION
SERVICE/BUSSINESS MODEL
DEVELOPMENT STATUS
3G is used in market at a higher cost because of license, hence it has limited progress
In contrast, Wi-Fi networking is rapidly growing
EMBEDDED SUPPORT SERVICE
3G was designed as upgraded technology for wireless voice service
Wi-Fi provides lower service for voice telephony and provides upgraded technology for data communication
Hence the potential advantage of 3G over Wi-Fi is that 3G offers better support for secure/private communication than Wi-Fi
STANDARDIZTION
For 3G there is relatively a small family of internationally sanctioned standards, i.e., referred as WCDMA(Wideband Code Division Multiple Access)
Wi-Fi is one of the families of continuously evolving 802.11* wireless Ethernet standards.
The standards picture for WLANs is not clear as 3G
SERVICE/BUSSINESS MODEL
3G is more developed than Wi-Fi as a business and service model
3G represents the extension of the existing service provider industry to new services
In contrast, Wi-Fi is more developed with respect to the supplier market, at least w.r.t. WLAN equipment
Future
IN FUTURE
Both Technologies are likely to succeed in the market
We expect 3G mobile providers to integrate Wi-Fi tech into their network
We expect Wi-Fi to offer competition to 3G providers because of the lower cost
