User's Manual

Table Of Contents

Ver.

CHAPTER 2. System Overview

2600-00FKQFGA2

1.0

2.2 Main Functions

The main functions of the Indoor Pico Cell (hereinafter, eNB) are as follows:

 Physical Layer Processing

 Call Processing Function

 IP Processing

 SON Function

 Easy Operation and Maintenance

Availability of System Features and Functions

For availability and provision schedule of the features and functions described in

the system manual, please refer to separate documentations.

2.2.1 Physical Layer Processing

The eNB transmits/receives data through the radio channel between the EPC and UE.

To do so, the eNB provides the following functions.

 OFDMA/SC-FDMA Scheme

 Downlink Reference Signal Creation and Transmission

 Downlink Synchronization Signal Creation and Transmission

 Channel Encoding/Decoding

 Modulation/Demodulation

 Resource Allocation and Scheduling

 Link Adaptation

 HARQ

 Power Control

 MIMO

OFDMA/SC-FDMA Scheme

The eNB performs the downlink OFDMA/uplink SC-FDMA channel processing that

supports the LTE standard physical layer. The downlink OFDMA scheme allows the

system to transmit data to multiple users simultaneously using the subcarrier allocated to

each user. Depending on the channel status and the transmission rate requested by the user,

the downlink OFDM can allocate one or more subcarriers to a specific subscriber to

transmit data.

In addition, when all sub-carriers are divided for multiple users, the eNB can select and

assign to each subscriber a sub-carrier with the most appropriate features using the

OFDMA scheme, thus to distribute resources efficiently and increase data throughput.

For uplink SC-FDMA, which is similar to OFDMA modulation and demodulation, a

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