Samsung SMM-BMR004 User's Manual

EPB ED.

Smart MBS

System De scr ipt ion /I nt roduc ti o n

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INTRODUCTION

Smart MBS System Description

Purpose

Document Content and Organization

This document introduces charact eristics, features, and structure for Smart MBS Base Station of the Samsung Multi-Modal System.

This document consists of 4 CHAPTERS, APPENDIX, and ACRONYMS.

Chapter 1. Samsung Multimodal System Abstract

Explains the following…

 Smart MBS System Introduction  Samsung Multimodal System Network Configuration  Samsung Multimodal System Feature

Chapter 2. Smart MBS Abstract

Explains the following…

 Smart MBS System’s Characteristics  Smart MBS ‘s Main Feature  Smart MBS ‘s Specification  Operation manual on Backhaul Interface

Chapter 3. HW Architecture of Smart MBS

Explains the following…

 System Internal Structure  UADU (Universal Platform Digital Unit)  RRH (Remote Radio Head)  Thermal Radiation Structure

INTRODUCTION

Chapter 4. SW Architecture of Smart MBS

Explains the following…

 Smart MBS SW Structure  Loading Flow

ABBREVIATION

Provides definition for acronyms used in this document.

Conventions

Following symbols are used in this document. The information provided along with this symb ol should be familiarized for safe operation/handling of the system.

Additional Reference Provides reference in addition to the main contents.

Reference

Revision History

Rev. Date Note

1.0 2011.06 First Edition

Smart MBS System Description

INTRODUCTION I

Purpose ................................................................................................... I

Document Content and Organization

Conventions .................................................................................................. II

Revision History

Chapter 1. Samsung Multi-ModalSystem Abstract 1-1

1.1 Introduction to Smart MBS System ......................................................................... 1-1

Samsung Multi-Modal System N etwork A r chitecture ...................................................... 1-4

1.2

1.2.1 CDMA System Network Architecture ........................................................ 1-6

1.2.2

LTE System Network Structure ............................................................... 1-7

Samsung Multi-Modal Sy st em Featur e .................................................................... 1-10

1.3

1.3.1 CDMA System Feature ...................................................................... 1-10

1.3.2

LTE System Feature .......................................................................... 1-12

...................................................................... I

............................................................................................... II

Chapter 2. Smart MBS Abstract 2-1

2.1 Smart MBS System Description ............................................................................ 2-1

2.1.1 Smart MBS CDMA System Feature

2.1.3 Smart MBS LTE System Feature

2.2

Smart MBS Main Feat ure ................................................................................... 2-6

2.2.1 Physical layer Processing Feature

2.2.2 Call Processing Feature

2.2.3 IP Processing Feature ........................................................................... 2-10

2.2.4 Convenient Operation and Maintenance Feature

Smart MBS Specification .................................................................................. 2-14

2.3

2.4 Backhaul Interface Operation

Chapter 3. Smart MBS’s Hardware Structure 3-1

3.1 Internal System Architecture ..................................................................................... 3-4

3.1.1

CDMA Internal System Architecture ......................................................... 3-4

............................................................. 2-3

................................................................ 2-3

.............................................................. 2-6

........................................................................... 2-9

........................................... 2-11

................................................................................. 2-19

III

TABLE OF CONTENTS

3.1.2 LTE Internal System Structure ............................................................... 3-6

3.2 UADU(Universal Platform Digital Unit) ........................................................................ 3-8

3.3 RRH (Remote Radio H ead )

3.4 Cooling Mechanism

3.4.1 Digital Unit (DU) ............................................................................... 3-17

3.4.2

RRH (Remote Radio Head) ................................................................. 3-17

3.5 Interface structure

Chapter 4. Smart MBS Software Architect ure 4-1

4.1 Smart MBS SW Architecture .................................................................................... 4-1

4.1.1 CDMA System Basic SW architecture

4.1.2 LTE System Basic SW Architecture

Loading Flow ................................................................................................ 4-7

4.2

ABBREVIATION I

.................................................................................... 3-14

............................................................................................ 3-17

.............................................................................................. 3-18

......................................................... 4-1

............................................................ 4-4

Smart MBS System Description

LIST OF FIGURES

Figure 1.1 Smart MBS System Schematic ................................................................... 1-2

Figure 1.2 Samsung Multi-modal Network Architecture .................................................... 1-4

Figure 1.3 CDMA Networ k A rchitecture of Samsung Multi-Modal System Figure 1.4 Samsung Multi-Mode System’s L TE Network Architecture

Figure 1.5 CDMA System Functional Structure ........................................................... 1-10

Figure 1.6 Function of E-UTRAN and EPC

Figure 3.1 UADU Configuration - CDMA Single mode Figure 3.2 UADU Configuration - LTE Single mode Figure 3.3 UADU Configuration - CDMA + LTE dual mode

Figure 3.4 RRH-C2 (800MHz) .............................................................................. 3-3

Figure 3.5 RRH-P4(1.9GHz) ................................................................................ 3-3

Figure 3.6 Smart MBS CDMA Internal Block Diagram

Figure 3.7 Smart MBS LTE’ s I nternal Block Diag ram ...................................................... 3-6

Figure 3.8 UADU Configuration - CDMA Only Figure 3.9 UADU Configuration - CDMA Only(Two UADU)

Figure 3.10 UADU Configuration - LTE Only ............................................................ 3-13

Figure 3.11 UADU Configuration - CDMA+LTE Dual Mode Figure 3.12 UADU Configuration - CDMA+LTE Dual Mode(Two UADU)

Figure 3.13 UADU’s FAN Str ucture ....................................................................... 3-17

Figure 3.14 UADU’s Cooling Mechanism Figure 3.15 HW Interface structure of UADU(CDMA)

Figure 3.16 HW Interface structure of UADU(L TE) ...................................................... 3-19

Figure 3.17 HW Interface structure of RRH-C2 ........................................................... 3-19

Figure 3.18 HW Interface structure of RRH-P4 ........................................................... 3-20

Figure 4.1 Smart MBS CDMA Software Architecture Figure 4.2 CDMA Common Software Archit ecture

Figure 4.3 CDMA OAM Software Ar chitecture ............................................................. 4-3

Figure 4.4 CDMA Call Processing Software Structure Figure 4.5 Smart MBS L TE Sof tw are Architecture

Figure 4.6 Smart MBS' Loading Signal Flow ............................................................... 4-8

................................ 1-6

..................................... 1-8

............................................................... 1-12

.................................................... 3-2

....................................................... 3-2

............................................... 3-2

.................................................... 3-4

.......................................................... 3-12

........................................... 3-13

............................................ 3-13

............................. 3-13

................................................................ 3-17

................................................... 3-18

...................................................... 4-1

......................................................... 4-2

...................................................... 4-3

.......................................................... 4-4

TABLE OF CONTENTS

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Smart MBS System Description

Chapter 1. Samsung Multi-Modal

System Abstract

1.1 Introduction to Sm art MB S System

As mobile telecommunication technology has experienced rapid growth from “Analog Mobile Telecommunication(1

2000(3

Generation)”, and into “WiMAX/LTE(4th Generati on)”, voice service is being expanded into data service. Especially, “wire/wireless hybrid service”, “s martphone”, and “m obile terminal” increased the demands for the high speed wireless technology. Along with the enhancement of various mobile telecommunication networks, it is now becoming common for a single terminal to support different mobile technologies.

“Smart MBS System” is multi-mode base station that will satisfy such needs of mobile telecommunication market by integrating Voice(1X), Data(EVDO), WiMAX/ station equipment. Smart MBS System mounts common DU(Digital Unit) Platform, and RRH (per each frequency bandwidth) that operator can decide to configure it with either single or multiple mobile technology. Smart MBS System provides CDMA(w/ FDD), LTE(w/FDD),

Smart MBS System supports the following telecommunication technologies.

 CDMA2000 1X/1X Adv ance d

Having CDMA2000 1X as a ref erenc e, in tegr ate th e system (w/ EVRC-B, RLIC, QOF, New RC algorithm) and the terminal(w/ ( e )QLIC, MRD, Ne w RC algorithm) to support 1X Advanced. As a result, voice capacity enhancement will be provided.

 CDMA2000 1xEV-DO Rev.A/Rev.B

Smart MBS supports CDMA2000 1xEV-DO Rev.A/Rev.B s ervice and data service of CDMA network.

 WiMAX IEEE 802.16e

WiMAX IEEE 802.16e System is a wireless network system that provides service based on IEEE

802.16 standard. IEEE 802.16 standard is basis of WiMAX, it contains IEEE Std 802.16-2004 which defines the fixed wireless interne t connection service, and P802.16-2004/Cor2/D3 which defines the mobility algorithms such as handover and paging. WiMAX System uses

Generation)” to “Digita l Mobi le Telecommunication(2nd Generation)” to “ CD MA

LTE(4G) into a single base

WiMAX(w/TDD), and TD-LTE(w/TDD).

1-1

Samsung Multi-ModalSystem Abstract

기존 기지국 시스템

OFDMA(Orthogonal Freque ncy Division Multiple Access) t ra nsmission algorithm with T DD(Time Division Duplex) technology to provide a high speed data service, and larger coverage area when compare d to e xis tin g wi re less LAN . Als o, h igh -end hardwar e is imp lement ed f or incr ease d s ystem performance & capacity, and to provide various high speed data feature/service.

 LTE (Long Term Evolution)

Samsung LTE System is a wireless network system that supports 3GPP LTE(Long Term Evolution)(a.k. a. LTE). It improves the existing 3 GPP mobile telecom munication system(low data throughput, but high in cost) to a next generation wireless network system which provides a high speed data service with minimal cost. Samsung LTE System supports “Downlink OFDMA”(Orthogonal Frequency Division Multiple Access) with either FDD(Frequency Division Duplex)), “Uplink S C(Single Carrier) FDMA”, and “Scalable Bandwidth(for various spectrum allocation)” to provide high speed data service. Also, high-end hardware is implemented to improve system perform ance and capacity that various high speed data feature/servic e can be provided.

1.9 GHz(CDMA/LTE)

800 MHz(CDMA/LTE)

Samsung Smart MBS

Figure 1.1 Smart MBS System Schematic

Samsung Multimodal System consists of following major features.

Enhancement of CDMA Service Quality

In case “Smart MBS System” is operating CDMA, it provides “EVDO Rev.0/Rev.A and 1X Advanced” in order to improve the low throughput and limited voice capacity. In addition, “2branch Rx Diversity” and “4branch Rx diversit y” feature is provided that CDM A network coverage is enhanced for versatile CDMA service.

Ease of Expanding 4G Ser vi c e

Legacy base stations c onsist of “3G CDMA 1X” for voice calls, “EVDO” for Data, “ Battery”, and

1-2

Smart MBS System Description

“Rectifier”. If 4G service was to be supplied, additional 4G base station equipment had to be installed. Nevertheless, “Smart MBS Base Station” on ly requires DU(Digita l Unit) cabinet and Battery cabinet to provide existing service as well as 4G Service with minimal board replacements and software upgrades. Therefore, Smart MBS Basesta tions u ti lizes the c ab les, rec tifie rs , and bat ter ies of the ex is ting b ases tati on system. Its ease of 4G installation will bring about efficient network implementation in the future commercial 4G service.

Green Solution

Smart MBS Basestation c ombines “3 G BS eq uipm ent” and th e “n ext gener ati on 4 G BS equ ip m ent” in t o a single Base Station, and also c ontains the rectifier within the DU cabinet. Meanwhile, RRH(Remote Radio Head) (TX/RX processing device) is separated apart from BS equipment for natural air cooling that it can minimize footprint, power usage, and carbon dioxide emissions.

Provides Efficient Backhaul Operation

Smart MBS Basestation pro vid es fu ncti ona lit y that can operat e m u ltiple te lecomm unica tion technologies into a single physical backhaul network for reducing backhaul expenses. In addition, it supports an efficient backhaul operation b y providing a “per-technolog y” sectional net work operati on by logically separating the backhaul, minimizing traffic interference between different technologies.

About Smart MBS

Smart MBS is basestation of Samsung Multi-Modal System that will provide BTS,

RAS, and eNB which will respecti ve ly serve the functionality of CDMA, and

WiMAX, and LTE. It is controlled by its respective upper NE (BSC for CDMA, ACR for WiMAX, EPC for LTE) to handle CDMA/WiMAX/LTE calls. For

detailed description of function and structure of Smart MBS C DM A/ LTE, please refer to Chapter 2,3,4 of this document. For the functio n a nd structure of Smart MBS WiMAX, please refer to the additional document.

1-3

Samsung Multi-ModalSystem Abstract

SMS

VMS

SCP

STP

DPI

Packet Data

1.2 Samsung Multi-Modal System Network Archit ect u re

Samsung Multi-Modal System is configured as shown in following Figure 1.2.

A1p

PSTN

MAP

A2p

Network

PCRF

EPC

(MME/S-GW/P-GW)

IMS-HSS

LTE-HSS/SPR

S6a

AAA

PMIP

Radius

HSGW/

PDSN

MAP MAP WIN

AAA

Radius

A10/A11

MSCe

BSC/RNC

CDMA LTE

HLR

MGW

RRU

CDMA/LTE/WiMAX

(800 M, 1.9 G)

Figure 1.2 Samsung Multi-modal Network Architecture

As shown in Figure 1.2, Smart MBS system plays a role as CDMA/WiMAX/LTE basestation in a Samsung Multi-Modal System network where CDMA, and WiMAX, and LTE systems co-exist.

When operating as CDMA, Smart MBS commu nicates with BS C(CDMA controller), and operator m ay use BSM(EMS of CDMA) to c ontrol and manage CDMA portion of Smart MBS. When operating as

WiMAX, it communicates with ACR(WiMAX controller), and operator may use WSM(EMS of WiMAX) to contr ol and mana ge WiMAX por tion of Sma rt MBS. Likewise, when operating as LTE, it

communicates with EPC, and operator may use LSM-R(EMS or LTE) to control and manage LTE portion of Smart MBS.

1-4

Smart MBS System Description

Following network structure describes the type of each technology supported by Smart MBS.

1-5

Samsung Multi-ModalSystem Abstract

Proprietary

1.2.1 CDMA System Network Architecture

CDMA system network of “Samsung Multi-Modal System” consists of AN(Access Networks) for terminal access, VCN(Voice Core Network) for voice service, and PCN(Packet Core Network) for packet data service. AN consists of B TS, BS C( BTS con tr ol ler ), IP Netw ork, Trans port Network, and finally BSM t o manage these components. AN communicates with VCN(MGW, MSC/MSCe) and PCN(AN-AAA, PDSN) to provide voice/data communication service to mobile subscribers.

MSCe

ESM

BSM

MGW

A2p

Proprietary

Smart MBS

IS2000, IS856

BSC

A1p

A12

,A10,A11

Smart MBS

AN-AAA

Internet

PDSN

Figure 1.3 CDMA Network Architecture of Samsung Multi-Modal System

CDMA Network Architecture of Samsung Multi-Modal System(where Smart MBS is operated as CDMA BTS) is shown in Figure 1.3. Following describes the feature per each CDMA network devices.

BTS (Base Transceiver Station)

BTS(CDMA Basestation) is a system that handles wireless interface with mobile termina ls in acc ordanc e with CDMA2000 1X and 1xEV-DO standards. It receives data from mobile terminal and forwards it to Core network through BSC, an d receives data fr om Core via BSC and f orwards it to m obile term in al . In order to play a role as wire less transceiver, BS manages RF resources such as CA(Carrier Allocat ion), Walsh. Also, it support s RF(Radio Frequency) Scheduling and Power Control Functionality.

BSC (Base Station Controller)

1-6

Smart MBS System Description

Through var ious backhaul interfaces, BSC coordinates with multiple BTS, and provides resources that are required for communica ting with BTS. BSC communicates with VCN to process “Voice/Circuit Data Calls”, and coordinates with PCN to process “Packet Data Calls”. Also, it carries out operation/maintenance func tion in conjunction with BSM. It executes RLP(Radi o Link Protocol) and SDU(Selection and Distribution Unit) function that Hand-Off will be available for mobile terminals. BSC also has PCF/(SC/MM) feature that “session control and mobility management function” is executed in 1xEV-DO network.

BSM (BSS System Manager)

BSM provides “operator interface” that operators can control and manage BCS and BTS. For Operation/Maintenance of BSC and BTS, BSM provides required commands such as “alarm/status/performance display”, “Configuration Management”, and “Parameter Control” of the system.

PDSN (Packet Data Serving Node) System

PDSN is a system which connects PCN to CDMA2000 1X (or 1xEV-DO), and it enables/maintains/disables the PP P to mobile termina l. PDSN particularly carries out functionality as FA(Foreign Agent) for HA(Home Agent) to provide mobile IP service.

AN-AAA (Access Network-Authorizatio n, Authe nticati on and Accounting)

AN-AAA is a server that performs authentication for subscribers in CDMA2000 1xEV-DO network. ANAAA executes authentication based on NAI(Network Access Identifier), and manages the “mapping data” of IMSI and terminal NAI.

MSC (Mobile service Switching Center)/MSCe (MSC emulator)

MSC(e) is a system component which provides “switching” role in CDMA2000 network. It provides additional services by connecting subscribers to additional equipments or other network(PSTN)

MGW (Media Gateway)

MGW is an equipment that pr ovides “b earer gatewa y function a lity” (Med ia con version and hand ling) in a CDMA 2000 network. MGW exchanges PCM data(which is based on TDM) with PSTN, and exchanges voice frame(which is based on IP) with BSC.

1.2.2 LTE System Network Structure

LTE netw ork of Samsu ng Multi-Modal S ystem incorporates Basestation(eN B), packet core(EPC), and LSM/(MSS). The system consists of multiple basestations(eNB: Evolved UTRAN Node-B) and Gateway (EPC: Evolved Packet Core, MME, S-GW/P-GW), and provides functionality for UE to connect to external network. In addition, LTE system provides LTE System Manager(LSM) and Self-Optim izat ion S erver Fea ture f or Operation/Maintenance of Basestation(eNB).

1-7

Samsung Multi-ModalSystem Abstract

EMS

LSM-C

EPC

P -GW

O CS

P C RF

P DN

HS S/SPR

MMES -GW

TL1

SNM P/FTP/U DP

X2-C

X2-U

S1MME

S1-U

S5/S8

S11

S10

S6a

EMS

LSM-R

MSS

RMI

Smart MBS

Figure 1.4 Samsung Multi-Mode System’s LTE Network Architecture

LTE network architecture of Sam sung Mu lti-Modal S ystem, wh ere the Sm art M BS is ope rate d as LTE’s Basestation(eNB), is as s hown in the Figure 1.4, and following features ar e available for each LTE network equipment.

eNB (Evolved UTRAN Node-B)

LTE Basestation(eNB) is a system located between UE and EPC, and it handles the packet calls b y connecting to UE wirelessly in accordanc e with “LTE Air standard”. eNB executes various functions including Tx/Rx of Wireless signal, Modulation/Demodulation of pac ket traffic, packet scheduling for efficient use of RF resources, HARQ (Hybrid Automatic Repeat Request) and ARQ (Automatic Repea t Request) process, PDCP(Pac ket Data Convergence Pr otocol) of c ompressed pac ket header, and wireless resource control. Also, it synchronizes with EPC to execute Handover.

EPC (Evolved Packet Core)

EPC is a system between Basestation(eNB) and PDN. It incorporates MME(Mobility Management Entity), S-GW (Serving Gateway), and PDN Gateway(P-GW). MME handles control message via basestation(eNB) and NAS signaling protocol, and management of mobility for terminal, management of Tracking Area List, bearer and session management. S-GW plays role as “anchor” on sub scriber plane between 2 G, 3 G Access system, and LTE system. It manages/modifies packet transmit layer of downlink/uplink data. P-GW allocates IP Address to UE, plays role as “anchor” for m obi lit y between “LT E S ystem ” and “n on3GPP Access Systems”, manages billing charges for different service levels, and handles

1-8

Smart MBS System Description

management/modification of the throughput rate.

LSM (LTE System Manager)

LSM provides a synchr onized interface for operat or that Operation/Maintenan ce can be performed for Basestaion(eNB) by operator. It also provides Software management, configuration management, performance management, and alarm management features.

HSS(Home Subscriber Server)

HSS is a database management system that stores the parameter and geographical data of entire subscribers. HSS manages important data including access availability, basic service, and additional service of the subscriber. It also performs “Rooting Feature” for subscribers receiving calls.

MSS(Master SON Server)

MSS is a higher node of Local SON server. It synchronizes with Local SON Server to optimize the synchronization in regards to Multi-LSM. MSS is a functi on that is comp atible with the operator O SS, and the availability of this function will be decided after discussion with operator.

PCRF(Policy Charging & Rule Function)

PCRF may generate policy rule in order to apply “QoS/Billing Policies per each Service Flow” dynamically. Or it may generate Policy rule that is applied uniformly to multiple Service Flow. Since IP ed ge contains PCEF(Policy and Charging Enforcement Function), Po licy Rules(received from PCRF) can be applied per each Service Flow.

OCS (Online Charging System)

If subscribers (with Online Billing information) makes call, subscriber’s billing information is sent/received.

CG (Charging Gateway)

Stores the generated billing data, and provides billing data per each subscriber.

1-9

Samsung Multi-ModalSystem Abstract

Abis

BSC

BTS

MAC

PHY

IP Pa cket Forwardin g

Packet Classifica tion

HARQ

Voice Handler

SUA Handler

AN-AAA Client

SC/MM

A11 Handler

A10 Handler

RLP Handler

1XVoice

1xEV-DO

Paging Con troller

IP Pa cket Forwardin g

Packet Classifica tion

ARQ

1.3 Samsung Multi-Modal System Feat ure

Following is the feature supported by each mobile technology of Samsung Multi-Mod al System.

1.3.1 CDMA System Feature

Following Figure shows CDMA system(BSC, BTS)based on 1X/1xEV-DO.

Figure 1.5 CDMA System Functional Structure

BSC works wi t h voice core equipments (MSCe, MGW) to manage signaling and bearer process for voice service. In BSC, SU A Handler is responsib le for A lp signaling with MS Ce, and Voice Handler sends the voice bearer traffic to MGW. In addition, it works with PDSN for 1X data and 1xEV-DO data service. A10 Handler manages the bea rer traffic of su ch data 1 X Data and 1xEV-DO Data service. A11 Handler manages signaling for data service. RLP Handler manages ARQ feature for data communication. For Authen tication of 1xEV-DO terminal, AN-AAA client is responsib le for synchr onization with ANAAA. SC/MM executes session control and mobility management for 1xEV-DO.

BTS is responsible for Radio Resource Control and terminal communication. Through CAI(Common Air Interface), it provides featur es such as high speed data service, multimedia ser vice, new hand off, in accordance with standards defined in 3GPP2 C.S0024-0_v4.0, 3GPP2 C.S0024-A_v3.0

C.S0024-B_v3.0, 3GPP2 C.S0063-B_v1.0

1-10

, and 3GPP2

Smart MBS System Description

1-11

Samsung Multi-ModalSystem Abstract

EPC

eNB(E-UTRAN)

RRC

PDCP

RLC

MAC

PHY

MME

NAS Security

Idle State Mobility

Handling

EPS Bearer Control

S-GW

Mobility Anch oring

P-GW

UE IP address

allocation

Packet Filtering

Inter Cell RRM

RB Control

Connection Mobility Control

Radio Admission Control

eNB Measure men t Configuration & Provision

Dynamic Resource Allocation (Scheduler)

1.3.2

LTE System Feature

Following Figure shows functional separat ion between eNB, MM E, S-GW, P-GW of E-UTR AN in accordance with 3GPP standard. Generally, eNB manages “C onnected mode” at AS(Access Stratum ) level. MME manages Idle m ode terminals in NAS(N on-Access Stratum ) level. Both S -GW and P-GW performs “user data management” and provide the “link to foreign network”. Following displays the functionality of eNB, MME, S-GW, and P -GW.

1-12

Figure 1.6 Function of E-UTRAN and EPC

eNB

eNB manages E-UTRAN(Evolved UTRAN), the wireless access network of LTE system. Multiple eNB are connected via X2 interface, and these eNB are connected to EPC(Evolved Packet Core) via S1 interface. Wireless pr otocol layer of e NB can b e divid ed into Layer1, Layer2, and Laye r 3. Laye r 3 con tains R RC layer, Layer 2 contains three layers(MAC layer(sublayer), RLC layer, PDCP layer) where each layer executes an indepen dent process. RR C layer belongs to layer 3 of the wireless protocol. Generally, RRC Layer is responsible for maint en anc e and c ontr ol of RB( Ra dio Bear er) , R RC conne ct ivity, and Exchange of System Data. Meanwhile, PDCP layer is responsible for header compression of IP packet, security features like “ciphering/inte grity check”, and “selecti ve transmission feature” wh ich can increase the efficiency of “radio resource”

RLC Layer is responsible a) for s egmenta tion and reassem bly at M AC Layer for da ta which was rece ived from PDCP layer; b) of restoring the tx failure(at lower level) via retransmission (ARQ); and c) of reordering which can be caused because by (HARQ in MAC layer) For each bearer, MAC Layer distributes RF res ources according to prior ity, multiplexes the data received

Smart MBS System Description

from various “Upper Logical Channels”, and performs HARQ(Hybrid ARQ).

MME(Mobility Management Entity)

MME works in conjunction with E-UTRAN(eNB) to hand le “S1-AP signalin g message ”(of SCTP ba se; used to control connection between MME and eNB) AND “N AS S igna ling message” ( of S CTP base; us ed to control mobility and connection between terminal and EPC.) In addition, it works in conjunction with HSS to obtain s ubsc ribe r inf ormati on, m odific ati on, and auth enti cati on. It can w ork in conjunction with SGW, as utilizing GTP-C protoc ol, to alloc ate bearer p ath (for da ta routing a nd forward ing, releas e, and modification) It can also work in conjunction with SGSN(of 2G, 3G) and MSC to provide Mobility, HO, CS fallback, and SMS service. MME can handle mobility, idle mode UE reachability, TA list management, P-GW/S-GW selection, authentication, and bearer management. MME supports mobility for handover between eNB, and supports handover be tween MME. Also, SGSN selection is supported when it hands over to 2G, 3G, or 3GPP network.

S-GW(Serving Gateway)

S-GW plays role as mobilit y anchor when h andove r is execut ed bet ween eN B, and 3GPP. As a supported function, packet data is “Routed”, “Forwarded”. Bi lling Policy can be configured differently per each of UE, PDN, and QCN. It can manage and modify the “packet transport layer” of the uplink/datalink data. In addition, S-G W s uppo rts GTP a nd PMI P protocol in conjunct io n wit h MME , P-GW , and SGSN.

P-GW(PDN Gat e wa y)

P-GW can execute Billing/Bearer policy in conjunction with PCRF, and per its policy. Billing, QoS, can be managed/modified per service level. P-GW provides Packet filtering feature per each subscriber, and allocates IP address to each UE. P-GW can manage/modify packet transport layer of the downlink Data.

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Samsung Multi-ModalSystem Abstract

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1-14

Smart MBS System Description

Chapter 2. Smart MBS Abstract

2.1 Smart MBS System Description

Smart MBS is the Basestat ion of Sam su n g Mu lti-Modal System. It is managed by packet core (either BSC,

ACR,

or EPC), and makes call to terminal to create CDMA/WiMAX/LT E li nks.

Smart MBS interfaces with UE via either CDMA(3GPP2 CDMA2000 1X Advanced and 1xEV-DO Rev.0/Rev.A high speed data service and multimedia services. In order to implement this, Sm art MBS can perform Modulation/Demodulation (for voice or packet traffic), assign Scheduling and Wireless Bandwidth (for efficient use of RF resour ces and to guarantee QoS), handle ARQ(Automatic Repeat request), perform ranging feature, provide connection control feature (for sending Smart MBS information and enable/maintain/disable the call), Synchronize BSC/ACR

By Fast Ethern et/Gigabit Ethernet backhaul, Smart MBS synchr onize the control stati on to transceive reliable co nt rol signal and traff ic signal.

Smart MBS is separated into UADU(Universal Platform Digital Unit, an indoor DU) and the RRH(Remote Radio He ad, a combined RF unit). UADU is mounted in the outdoor DU cabinet(along with the rectifier) to support outdoor environment.

UADU is a digital component for 19” shelf. It can be mounted onto either indoor or outdoor 19 inch commercial rack, and one UADU can provide the followin g maximum capacity. Based on operator ’s setup, it can be operated as omni type or sector type.

RRH is RF component that is built into a single module. It can be mounte d onto Walls, Poles, or Stands in outdoor environments.

Depending on Frequency bandwidth and duplexing type, RRH can be classified into following types.

(20110408)), WiMAX (IEEE 802.16) or or LTE(3 GPP LTE Rel.8/9). It provides broadband

/EPC, provides Power Control, and executes system operation management.

- CDMA 1X / EVDO : Max 128Carrier/3Sector(2Br)

Max 6Carrier/3Sector(4Br)

- WiMAX : Max 3Carrier/3Sector

- LTE (FDD) : Max 6Carrier5Carrier/3Sector

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Smart MBS Abstract

- RRH-C2: 800MHz Cellular band, 2Tx/2Rx RF path

- RRH-P4 : 1.9GHz PCS band, 4Tx/4Rx RF path

- RRH-B4 : 2.5GHz BRS band, 4Tx/4Rx RF path

Smart MBS has other features provided as below.

Common Platform DU/RRH

Digital boards of each wireless technology, to be mounted in Smart MBS, share the common DU platform. Therefore, different boards(for multiple technology) may be mounted in a single DU, and operator can mount up to 4 DU in outdoor DU cabinet to implement various configuration. RRH of Smart M BS can s imultane ously s upport m ultiple techn ologies in the sam e duplex ing t ype with the same bandwidth.

RRH(Remote Radio Head) separated from DU(Digital Unit)

In order to provide ease of installation and various network structure, Smart M BS has separated RRH from DU. Between RRH and DU, a fiber optic ‘Baseband I/Q and C&M’ interface, based on CPRI(Common Pub lic Radi o In terfa ce), is used to send /rec ei ve “da ta traffic s igna l” and “O AM data”. D U and RRH gets -48VDC from rectifier inside the outdoor DU cabinet.

Provide Easy Installation

RRH integrates optic-sync component and RF signal processor, and is a sm all & light weight single module. RRH can be mounted onto Walls, Poles, or Stands. In addition, distance between RRH and Antenna is minimized that RF si gnal loss(cau sed b y Feeder Line) is de creased . Ther efore, it can pr ovide improved RF performance when compared to Basestation that has Digital Unit and RF Unit altogether.

Natural Cooling Mechanism

RRH(Remote Radio Head) may be installed in outdoor environment, and its thermal-dynamic design efficiently dissipa tes he at wi tho ut requ ir em ent of ad di ti on al c ooling mechanism. A lso, no maintenance c os t is required for RRH cooling.

Feature for Loop-Back Test of the line between DU and RRH

In order to check functionality of the “Base-band I/Q and OAM interface” be tween DU and RRH, Sm art MBS provides Loop-back T est.

Provides Remote Firmware Downloading

RRH may be replaced with firmware to enhance service and upgrade new features. At this time, Site visit is not required as firmware can be downloaded from basestation operation server (such as BSM/WSM/LSM-R). Therefore, operator can minimize the site visit, reduce the maintenanc e cost, and easily operate the system.

Provides Monitoring Port.

Through debug port of RRH, operator can monitor the information about the unit.

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