Objectives of 4G LTE-
- Flexible channel bandwidth, between 5 to 20 Mhz, optionally up to 40 Mhz.
- A nominal data rate of 100 Mbits/s while the client physically moves at high speeds relative to the station, and 1Gbit/s while clients and station are in relatively fixed positions as defined by the ITU-R.
- A data rate of at least 100 Mbits/s between any two points in the world.
- Peak link spectral efficiency of 15 bit/s/Hz in the downlink and 6.75 bit/s/Hz in the uplink.
- System spectral efficiency of up to 3 bit/s/Hz/cell in the downlink and 2.25 bit/s/Hz/cell for indoor usage.
- Smooth handoff across heterogeneous networks.
- Seamless connectivity and global roaming across multiple networks.
- High quality of service for next generation multimedia support (real time audio, high speed data, HDTV video content, mobile TV, etc.)
- Interoperability with existing wireless standards.
- An all IP, packet switched network.
Advantages of 4G-
1) For users-a)Select network depending on service requirement and cost .
b)Connect to any network-worldwide roaming c)Access to new services.
2) For operation-
a)Respond to variations in traffic demand.
b)Incorporate service enhancements and improvements.
c)Rapid development of new personalized and customized services.
a)Single platform for all markets.
b)Increased flexible and efficient production.
Limitations of 4G-
1) Mobile Station-a)Multimode user terminals.
b)Wireless system discovery.
c)Wireless system selection.
2) System– a)Terminal mobility.
b)Network infrastructure and Qos support.
c)Fault tolerance and security.
3)Service -a)Multi-operation and billing system.