Mumbai university > Comp > SEM 8 > Mobile Communication

Marks: 8M

Year: Revised 2012

Limitations of 3G

• The maximum bit rates were still a factor of 10 and more behind the simultaneous state of systems like IEEE 802.11n and 202.16e/m.

• The latency of user plane traffic (UMTS: >30ms) and of resource assignment procedures (UMTS: >100MS) is too big to handle traffic with high rate variance efficiently

• The UE terminal complexity for WCDMA or CDMA systems is quite high making terminals expensive, resulting in poor performing implementations of receivers and inhibiting the implementation of receivers and inhibiting the implementation of other performances enhancements.

VISION for 4G

• This is the term used to refer to the fourth generation of mobile wireless services that has been defined by the ITU and its Radio Communication Sector (ITU-B) and established as an agreed upon and globally accepted definition in IMT-Advanced

• 4G used broadly to include several types of broadband wireless access communication systems, not only cellular telephone systems

• 4G is a network that operates on Internet technology, combines it with other applications and technologies such as WiFi, and runs at speeds ranging from 100Mbps (in cell-phone networks) to 1Gbps (in local WiFi networks)

• The 4G systems are about seamlessly integrating terminals, networks and applications to satisfy increasing user demands

• 4G is a set of standards of mobile technology that entail increased data transfer speeds, enhanced security and reduced blips in transmission when a device moves between areas covered by different networks

• The 4G intends to integrate from satellite broadband to high altitude platform to cellular 2G and 3G systems to Wireless Local Loop and broadband wireless access to WLAN and wireless personal area networks all with IP as the integrating.