User's Manual

Table Of Contents

Ver.

CHAPTER 3. System Structure

2600-00FKQFGA2

1.0

3.2 Software Structure

3.2.1 Basic Software Structure

The software of the eNB is divided into three parts: Kernel Space (OS/DD), Forwarding

Space (NPC, NP) and User Space (MW, IPRS, CPS, OAM) which are described below.

Figure 14. Indoor Pico Cell Software Structure

Operating System (OS)

The OS initializes and controls the hardware devices and ensures the software is ready to

run on the hardware devices.

The OS consists of a booter, kernel, root file system (RFS) and utility.

 Booter: Performs initialization on boards. It initializes the CPU, L1/L2 Cache, UART,

and MAC and the devices such as CPLD and RAM within each board, and runs the u-

boot.

 Kernel Manages the operation of multiple software processes and provides various

primitives to optimize the use of limited resources.

 RFS: Stores and manages the binary files, libraries, and configuration files necessary

for running and operating the software in accordance with the File-system Hierarchy

Standard 2.2 (FHS).

 Utility: Provides the functions for managing the complex programmable logic device

(CPLD), LED, watchdog, and environment and inventory information, measuring and

viewing the CPU load, and storing and managing fault information when a processor

goes down.

IPRS

IPSS

CPS

ECMB

ECCB

SCTB

TrM

GTPB

PDCB

RLCB

MACB

OAM

SNMP

SwM

Web-EMT

Transport OS DD

Hardware

OSAB

CSAB

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