- 2072 Asoj · 3 marks
Short note: LTE
Short answer
LTE is the 4G 3GPP standard (Release 8), using OFDMA downlink, SC-FDMA uplink, MIMO, and flexible bandwidths up to 20 MHz. Peak rates reach 300 Mbps down, 75 Mbps up, with sub-10 ms radio latency, and a flat all-IP architecture with eNodeBs and the Evolved Packet Core.
Write a short note on LTE.
LTE (Long Term Evolution) is the 4G mobile broadband standard of 3GPP (Release 8 onward), designed for high data rates, low latency and an all-IP network.
- Air interface: OFDMA in the downlink and SC-FDMA in the uplink (lower peak-to-average power for mobile batteries); QPSK, 16-QAM, 64-QAM; MIMO (up to 4×4).
- Bandwidth: flexible 1.4, 3, 5, 10, 15, 20 MHz; FDD and TDD.
- Peak rates: about 300 Mbps down and 75 Mbps up (Rel-8); LTE-Advanced reaches 1 Gbps with carrier aggregation.
- Latency: under 10 ms on the radio side.
- Architecture: flat — UE, eNodeB, and the Evolved Packet Core (MME, S-GW, P-GW, HSS); voice carried as VoLTE.
[UE]~~[eNodeB]--[MME / S-GW]--[P-GW]--Internet
✓ Answer checked by Claude Opus 5.5 (high effort)