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2: Technology Overview
Rev 6 Mar.13
Proprietary and Confidential - Contents subject to change
LTE
LTE (Long Term Evolution) is a 4th-generation wireless standard.
The
3GPP
Release 8 specification outlines the features and
requirements.
Key features include.
•
Peak data rate:
· 100 Mbps DL within 20 MHz bandwidth
(Peak DL data rate in 10 MHz bandwidth: 70 Mbps (approx.) for
Cat 3 device)
· 50 Mbps UL within 20 MHz bandwidth
Actual throughput is dependent on the network configuration,
bandwidth assigned to the UE, the number of users, and RF sig-
nal conditions.
•
Up to 200 active users in a cell (5 MHz)
•
Less than 5 ms user-plane latency
•
Supported bandwidths: 5 MHz / 10 MHz / 20 MHz
•
Spectrum flexibility: 1.4–20 MHz (3–20 MHz in future F/W
release)
•
Enhanced support for end-to-end
•
Physical layer uses:
· DL: OFDMA (Orthogonal Frequency Division Multiple Access).
Modulation: QPSK, 16QAM, and 64QAM
· UL: Single Carrier FDMA (single carrier modulation and
orthogonal frequency multiplexing)
Modulation: QPSK, 16QAM
•
MIMO (Multi-Input Multi-Output) antenna support
UMTS
The Universal Mobile Telecommunications System (UMTS)
specification is the 3G mobile systems standard based on an
evolution of GSM core network components. High-speed 3G systems
implementing the UMTS standard enable improved performance for
wireless data applications, delivery of enhanced multimedia content,
and improved network capacity to support additional subscribers.
HSPA
HSPA is a third generation (3G) evolution of WCDMA that combines
two extensions to UMTS — HSDPA (High Speed Downlink Packet
Access) and HSUPA (High Speed Uplink Packet Access).
QOS
2
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