Gisfi Convergence india

Presented by,

Dr. Vijay M. Wadhai

7/9/2009 GISFI_CONVERGENCE MIT_SAT 2

TrendsConvergence TechnologyNGN‐IMSChallenges Conclusion

2


Proprietary technologies

IEEE 802 Family

3GPP Family

WCDMA FDDWCDMA TDDTD-SCDMACDMA 1xEV-DO / DV……

IPWireless TDDInterDigital TDD

FlarionNaviniNextNetArrayCommBeamreach….

802.20

802.16e802.16-2004 (WiMax)802.11b802.11a / g / n / s…

AirGo

licensed spectrum

unlicensed spectrum

4G


Mobile StationMultimode User TerminalsWireless System DiscoveryWireless System Selection


SystemTerminal MobilityNetwork Infrastructure and QoS SupportSecurityFault Tolerance and Survivability


ServiceMulti‐operators and Billing SystemPersonal Mobility


4G definitionA global consensus on the 4G definition is needed before the standardization starts.Despite efforts there still are too many diverging approached to 4G.GISFI’s Efforts

Seamless connectivityInter‐ and intra‐network connectivity is fundamental to the provision of temporally and spatially seamless services.Vertical and horizontal handovers are critical for 4G. In the former case, the heterogeneity and variety of networks exacerbate the problem.IMS Network

LatencyMany 4G services are delay sensitive.Guaranteeing short delays in networks with different access architecture and coverage is far from straightforward.

IPV6 &IDMP based fast handover protocol


Concealing complexity4G networks would be undoubtedly complex, but this needs to be hidden from the user.Server based solution‐IMS

Spectrum issuesIt is difficult to design a wireless system without knowing the channel, in particular if exploit multi‐antenna technology.Cognitive Radio*, MIMO Technique.Spectrum planning‐ 40 telecom services – Mobile TV, IM broadcasting, Satellite,WimaxSpectrum management‐Dr Ashok Chandra

Complex resource allocationManagement of time, frequency and spatial resources in a multi‐network, multi‐user environment is far from trivial.Software Defined Radio

InterferenceMultiple access interference control and mitigation in heterogeneous environments (coexisting air interfaces, varied terminals and services) is an issue.OFDM,CR


Cognitive radio is an intelligent wireless communicationsystem that is aware of its surrounding environment (i.e., outsideworld), and uses the methodology of understanding‐by‐buildingto learn from the environment and adapt its internal states tostatistical variations in the incoming RF stimuli by makingcorresponding changes in certain operating parameters (e.g.,transmit‐power, carrier‐frequency, and modulation strategy) inreal‐time, with two primary objectives in mind:

• highly reliable communications whenever and whereverneeded;• efficient utilization of the radio spectrum.

(Dr. Ramji Prasad)


1) Radio‐scene analysis, which encompasses the following:

• estimation of interference temperature of the radio environment;

• detection of spectrum holes.2) Channel identification, which encompasses the following:

• estimation of channel‐state information (CSI);• prediction of channel capacity for use by thetransmitter3) Transmit‐power control and dynamic spectrum management.


Power consumptionBy any measure, power consumption in future multi‐function multi‐standard 4G terminals will sharply increase.Usability is seriously compromised, heat management becomes an issue.OFDM,WOFDM,OFDMA.

Cost Cost of infrastructure is key for the success of 4G. However, new access architectures may require a large number of access points.Cost of terminal should be low enough to attract customers.Services need to be attractively priced.Rural –plastic terminal –very low cost


From user driven perspective, the user has freedom and flexibility to select the service, at a

reasonable QoS and price, anytime, anywhere

Reconfigurability: Next-generation wireless network interfaces need to be able to switch

seamlessly between different communications standards, in order to provide the most suitable

level of service while the user moves across different environments.

Convergence:Network convergence is the key to the fourth generation

Convergence is what 4G is about

– Fixed, Celluar phone systems, WPANs,WLANs ,Broadcasting/Satellite Commnunication

Hierarchy of wireless networks: 4G will consist of a hierarchy of quality/bandwidth modes


4G - The Next Generation Wireless27

4G is showing tremendous promise and has the capacity to revolutionize our world. Migration to 4G networks will be evolutionary

Before the realization of the 4G wireless society, very difficult but interesting technical challenges are waiting for us ...

4G, convergence of networks, technologies, applications and services, will offer

a personalized and pervasive network to the users.

Convergence is heading towards an advent of a really exciting and disruptive

concept of 4th generation mobile networks.

Scope of wireless networks is expanding

Intelligent applications and user interfaces need to develop


Web Link‘Wikipedia’ – title: 4Ghttp://en.wikipedia.org/wiki/4GNational Science Foundationhttp://www.nsf.govGroups working on 4G : WWRF , projects funded by NSF , Lucent , AT&T, Motorola, etc.http://www.wireless‐world‐research.org/4G Wireless Systemshttp://users.ece.gatech.edu/~jxie/4G4G Wireless Standardhttp://www.nd.edu/~mhaenggi/NET/wireless/4G/IEEE:http://www.ieee.orgIEEE Communications Society:http://www.comsoc.org/index.htmlInternational Telecommunications Union:http://www.itu.orgAssociation of Computer Machinery:http://www.acm.orgEuropean Telecommunications Standard Institue:http://ww.etsl.org3Gpp partnership project:http://www.3gpp.orgInternet Engineering Task Force:http://www.ietf.orgBBluetooth official website:http://www.bluetooth.comWAP forum:http://www.WAPForum.org

http://en.wikipedia.org/wiki/4G

http://www.nsf.gov/

http://www.wireless-world-research.org/

http://users.ece.gatech.edu/~jxie/4G

http://www.nd.edu/~mhaenggi/NET/wireless/4G/

http://www.ieee.org/

http://www.comsoc.org/index.html

http://www.itu.org/

http://www.acm.org/

http://ww.etsl.org/

http://www.3gpp.org/

http://www.bluetooth.com/

http://www.wapforum.org/

http://webpages.uncc.edu/~zli19/4g.htm

Gisfi Convergence india

Technology

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