Why LTE is required?

• Exponential growth of mobile data traffic, demands the need for increasing the capacity of existing mobile networks
• The emerging internet applications requiring high data rates and low latency

How LTE is evolved?

• LTE is initiated as Release-7 study item.

What factors driving LTE

• Reduced latency
• high user data rates – both peak and average
• improved system capacity and coverage
• cost-reduction to operator

Major requirements for LTE in Release-7

• High data rates, 100Mbps(DL) and 50Mbps(UL)
• Improved latency, RAN latency<10ms and also control plane latency
• Improved spectral efficiency
• Scalable bandwidth, 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz
• Support for both paired(FDD) and unpaired(TDD) spectrum
• Support/backward compatibility for working with legacy networks, Eg.

Reference: Requirements for Evolved UTRA (E-UTRA) and Evolved UTRAN(E-UTRAN), 3GPP TR 25.913