Gisfi Convergence india


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next generation network and key technological issues for convegence

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Gisfi Convergence india

  1. 1. Presented by, Dr. Vijay M. Wadhai
  2. 2. Trends Convergence   Technology NGN‐IMS Challenges  Conclusion 7/9/2009 GISFI_CONVERGENCE            MIT_SAT 2
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  14. 14. 4G WCDMA FDD IPWireless TDD Flarion WCDMA TDD InterDigital TDD TD-SCDMA Navini CDMA 1x licensed spectrum NextNet EV-DO / DV ArrayComm … Beamreach … …. 802.20 AirGo 3GPP Family 802.16e 802.16-2004 (WiMax) Proprietary 802.11b technologies 802.11a / g / n / s IEEE 802 Family … unlicensed spectrum 147/9/2009 GISFI_CONVERGENCE            MIT_SAT 14
  15. 15. 157/9/2009 GISFI_CONVERGENCE            MIT_SAT 15
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  17. 17. Mobile Station Multimode User Terminals Wireless System Discovery Wireless System Selection 7/9/2009 GISFI_CONVERGENCE            MIT_SAT 17
  18. 18. System Terminal Mobility Network Infrastructure and QoS Support Security Fault Tolerance and Survivability 7/9/2009 GISFI_CONVERGENCE            MIT_SAT 18
  19. 19. Service Multi‐operators and Billing System Personal Mobility 7/9/2009 GISFI_CONVERGENCE            MIT_SAT 19
  20. 20. 4G definition A 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 connectivity Inter‐ 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 Latency Many 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 207/9/2009 GISFI_CONVERGENCE            MIT_SAT 20
  21. 21. Concealing complexity 4G networks would be undoubtedly complex, but this needs to be hidden from the user. Server based solution‐IMS Spectrum issues It 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,Wimax Spectrum management‐Dr Ashok  Chandra   Complex resource allocation Management of time, frequency and spatial resources in a multi‐network, multi‐user environment is  far from trivial. Software Defined Radio Interference Multiple access interference control and mitigation in heterogeneous environments (coexisting air  interfaces, varied terminals and services) is an issue. OFDM,CR 217/9/2009 GISFI_CONVERGENCE            MIT_SAT 21
  22. 22. Cognitive radio is an intelligent wireless communication system that is aware of its surrounding environment (i.e., outside world), and uses the methodology of understanding‐by‐building to learn from the environment and adapt its internal states to statistical variations in the incoming RF stimuli by making corresponding changes in certain operating parameters (e.g., transmit‐power, carrier‐frequency, and modulation strategy) in real‐time, with two primary objectives in mind: • highly reliable communications whenever and wherever needed; • efficient utilization of the radio spectrum. (Dr. Ramji Prasad) 7/9/2009 GISFI_CONVERGENCE            MIT_SAT 22
  23. 23. 7/9/2009 GISFI_CONVERGENCE            MIT_SAT 23
  24. 24. 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 the transmitter 3) Transmit‐power control and dynamic spectrum  management. 7/9/2009 GISFI_CONVERGENCE            MIT_SAT 24
  25. 25. Power consumption By 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 257/9/2009 GISFI_CONVERGENCE            MIT_SAT 25
  26. 26. 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 267/9/2009 GISFI_CONVERGENCE            MIT_SAT 26
  27. 27. 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 4G - The Next Generation 277/9/2009 Intelligent applications and user interfaces need to develop Wireless GISFI_CONVERGENCE            MIT_SAT 27
  28. 28. Web Link ‘Wikipedia’ – title: 4G National Science Foundation Groups working on 4G : WWRF , projects funded by  NSF , Lucent , AT&T, Motorola, etc. http://www.wireless‐world‐ 4G Wireless Systems 4G Wireless Standard IEEE: IEEE Communications Society: International Telecommunications Union: Association of Computer Machinery: European Telecommunications Standard Institue: 3Gpp partnership project: Internet Engineering Task Force: http://www.ietf.orgB Bluetooth official website: WAP forum: 287/9/2009 GISFI_CONVERGENCE            MIT_SAT 28
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