Samsung SMM-2LD0581902 User Manual

EPB

ED.

Smart MBS

System Description/Introduction

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Smart MBS System Description

INTRODUCTION

Purpose

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

Document Content and Organization

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 symbol 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
	Rev.		Date	Note

1.0		2011.06		First Edition

II	© SAMSUNG Electronics Co., Ltd.

Smart MBS System Description

TABLE OF CONTENTS

INTRODUCTION	I

Purpose .....................................................................................................	I
Document Content and Organization .......................................................................	I
Conventions ....................................................................................................	II
Revision History.................................................................................................	II

Chapter 1. Samsung Multi-ModalSystem Abstract			1-1

1.1	Introduction to Smart MBS System...........................................................................		1-1
1.2	Samsung Multi-Modal System Network Architecture .......................................................		1-4
	1.2.1 CDMA System Network Architecture .........................................................		1-5
	1.2.2 LTE System Network Structure ................................................................		1-6
1.3	Samsung Multi-Modal System Feature.......................................................................		1-9
	1.3.1	CDMA System Feature..........................................................................	1-9
	1.3.2	LTE System Feature...........................................................................	1-10

Chapter 2. Smart MBS Abstract		2-1
2.1	Smart MBS System Description ..............................................................................	2-1
	2.1.1 Smart MBS CDMA System Feature..............................................................	2-3
	2.1.3 Smart MBS LTE System Feature .................................................................	2-3
2.2	Smart MBS Main Feature.....................................................................................	2-6
	2.2.1 Physical layer Processing Feature................................................................	2-6
	2.2.2 Call Processing Feature............................................................................	2-9
	2.2.3 IP Processing Feature ............................................................................	2-10
	2.2.4 Convenient Operation and Maintenance Feature............................................	2-11
2.3	Smart MBS Specification ....................................................................................	2-14
2.4	Backhaul Interface Operation...................................................................................	2-18

Chapter 3. Smart MBS’s Hardware Structure	3-1
3.1 Internal System Architecture ......................................................................................	3-3
3.1.1 CDMA Internal System Architecture ..........................................................	3-4

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 Head)......................................................................................		3-14
3.4 Cooling Mechanism..............................................................................................		3-16
3.4.1	Digital Unit (DU) ................................................................................	3-16
3.4.2	RRH (Remote Radio Head)...................................................................	3-16
3.5 Interface structure ................................................................................................		3-17

Chapter 4. Smart MBS Software Architecture	4-1
4.1 Smart MBS SW Architecture ......................................................................................	4-1
4.1.1 CDMA System Basic SW architecture...........................................................	4-1
4.1.2 LTE System Basic SW Architecture..............................................................	4-4
4.2 Loading Flow..................................................................................................	4-7

ABBREVIATION	I

IV	© SAMSUNG Electronics Co., Ltd.

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 Network Architecture of Samsung Multi-Modal System.................................		1-5
Figure 1.4 Samsung Multi-Mode System’s LTE Network Architecture......................................		1-7
Figure 1.5 CDMA System Functional Structure ..............................................................		1-9
Figure 1.6 Function of E-UTRAN and EPC ................................................................		1-10
Figure 3.1 UADU Configuration - CDMA Single mode .....................................................		3-2
Figure 3.2 UADU Configuration - LTE Single mode.........................................................		3-2
Figure 3.3 UADU Configuration - CDMA + LTE dual mode................................................		3-2
Figure 3.5	RRH-P4(1.9GHz)..................................................................................	3-3
Figure 3.6 Smart MBS CDMA Internal Block Diagram......................................................		3-4
Figure 3.7 Smart MBS LTE’s Internal Block Diagram .......................................................		3-6
Figure 3.8	UADU Configuration - CDMA Only ...........................................................	3-12
Figure 3.9 UADU Configuration - CDMA Only(Two UADU) ............................................		3-13
Figure 3.10 UADU Configuration - LTE Only .............................................................		3-13
Figure 3.11 UADU Configuration - CDMA+LTE Dual Mode.............................................		3-13
Figure 3.12 UADU Configuration - CDMA+LTE Dual Mode(Two UADU)..............................		3-13
Figure 3.13 UADU’s FAN Structure ........................................................................		3-16
Figure 3.14 UADU’s Cooling Mechanism..................................................................		3-16
Figure 3.15 HW Interface structure of UADU(CDMA)....................................................		3-17
Figure 3.16 HW Interface structure of UADU(LTE) .......................................................		3-18
Figure 3.18 HW Interface structure of RRH-P4.............................................................		3-18
Figure 4.1 Smart MBS CDMA Software Architecture .......................................................		4-1
Figure 4.2	CDMA Common Software Architecture ..........................................................	4-2
Figure 4.3	CDMA OAM Software Architecture ..............................................................	4-3
Figure 4.4 CDMA Call Processing Software Structure .......................................................		4-3
Figure 4.5 Smart MBS LTE Software Architecture...........................................................		4-4
Figure 4.6 Smart MBS' Loading Signal Flow.................................................................		4-8

TABLE OF CONTENTS

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Smart MBS System Description

Chapter 1. Samsung Multi-Modal

System Abstract

1.1 Introduction to Smart MBS System

As mobile telecommunication technology has experienced rapid growth from “Analog Mobile Telecommunication(1st Generation)” to “Digital Mobile Telecommunication(2nd Generation)” to “CDMA 2000(3rd Generation)”, and into “LTE(4th Generation)”, voice service is being expanded into data service. Especially, “wire/wireless hybrid service”, “smartphone”, and “mobile 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), LTE(4G) into a single base 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 Advanced

Having CDMA2000 1X as a reference, integrate the system (w/ EVRC-B, RLIC, QOF, New RC algorithm) and the terminal(w/ (e)QLIC, MRD, New 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 service and data service of CDMA network.

LTE (Long Term Evolution)

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Samsung Multi-ModalSystem Abstract

Samsung LTE System is a wireless network system that supports 3GPP LTE(Long Term Evolution)(a.k.a. LTE). It improves the existing 3GPP mobile telecommunication 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 SC(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 performance and capacity that various high speed data feature/service 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 diversity” feature is provided that CDMA network coverage is enhanced for versatile CDMA service.

Ease of Expanding 4G Service

Legacy base stations consist of “3G CDMA 1X” for voice calls, “EVDO” for Data, “Battery”, and “Rectifier”. If 4G service was to be supplied, additional 4G base station equipment had to be installed. Nevertheless, “Smart MBS Base Station” only requires DU(Digital Unit) cabinet and Battery cabinet to provide existing service as well as 4G Service with minimal board replacements and software upgrades.

Therefore, Smart MBS Basestations utilizes the cables, rectifiers, and batteries of the existing basestation system. Its ease of 4G installation will bring about efficient network implementation in the future commercial 4G service.

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Smart MBS System Description

Green Solution

Smart MBS Basestation combines “3G BS equipment” and the “next generation 4G BS equipment” into a single Base Station, and also contains 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 provides functionality that can operate multiple telecommunication technologies into a single physical backhaul network for reducing backhaul expenses. In addition, it supports an efficient backhaul operation by providing a “per-technology” sectional network operation 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 and eNB which will respectively serve the functionality of CDMA and LTE. It is controlled by its respective upper NE (BSC for CDMA,EPC for LTE) to handle CDMA/LTE calls. For detailed description of function and structure of Smart MBS CDMA/LTE, please refer to Chapter 2,3,4 of this document. For the function and structure of Smart MBS, please refer to the additional document.

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Samsung Multi-ModalSystem Abstract

1.2 Samsung Multi-Modal System Network Architecture

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

Packet Data		Sp					PSTN
Network		Sp
	PCRF	IMS-HSS
	PCRF	LTE-HSS/SPR		SMS		VMS	SCP
DPI		LTE-HSS/SPR

	Gx	S6a
	Gx	S6a			MAP	MAP	WIN
					MAP	MAP	WIN
		AAA	Radius				HLR
		AAA		AAA			HLR
							MAP
				HA		STP
				Radius
		PMIP		HSGW/
	EPC			PDSN
	EPC			A10/A11
	(MME/S-GW/P-GW)			A10/A11		MSCe
	(MME/S-GW/P-GW)					MSCe
						A1p	A2p
							A2p
							MGW
	S1
					BSC/RNC
	LTE				CDMA
		RRU
		CDMA/LTE
	Figure 1.2	Samsung Multi-modal Network Architecture

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

When operating as CDMA, Smart MBS communicates with BSC(CDMA controller), and operator may use BSM(EMS of CDMA) to control and manage CDMA portion of Smart 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.

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

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Smart MBS System Description

1.2.1CDMA 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 BTS, BSC(BTS controller), IP Network, Transport Network, and finally BSM to 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

MGW			A1p
MGW			A1p

	A2p				AN-AAA
	A2p			A12
				A12

		,A10,A11	Internet
ESM	Proprietary
ESM	BSC
BSM	BSC
BSM	Proprietary		PDSN
	Proprietary		PDSN
	Proprietary	Proprietary

Smart MBS Smart MBS

IS2000,

IS856

UE UE

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 terminals in accordance with CDMA2000 1X and 1xEV-DO standards. It receives data from mobile terminal and forwards it to Core network through BSC, and receives data from Core via BSC and forwards it to mobile terminal. In order to play a role as wireless transceiver, BS manages RF resources such as CA(Carrier Allocation), Walsh. Also, it supports RF(Radio Frequency) Scheduling and Power Control Functionality.

BSC (Base Station Controller)

1-5

Samsung Multi-ModalSystem Abstract

Through various backhaul interfaces, BSC coordinates with multiple BTS, and provides resources that are required for communicating 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 function in conjunction with BSM. It executes RLP(Radio 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 PPP to mobile terminal. PDSN particularly carries out functionality as FA(Foreign Agent) for HA(Home Agent) to provide mobile IP service.

AN-AAA (Access Network-Authorization, Authentication 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 provides “bearer gateway functionality” (Media conversion and handling) 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.

1.2.2LTE System Network Structure

LTE network of Samsung Multi-Modal System incorporates Basestation(eNB), 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-Optimization Server Feature for Operation/Maintenance of Basestation(eNB).

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Smart MBS System Description

PDN

OCS

EPC

S10

PCRF

EMS

P-GW

S5/S8

LSM-C

TL1

S6a

S-GW

S11

MME

HSS/SPR

EMS

S1-U

S1-

MME

LSM-R

SNMP/FTP/UDP

X2-C

RMI

X2-U

Smart MBS Smart MBS

MSS

UE UE

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

LTE network architecture of Samsung Multi-Modal System, where the Smart MBS is operated as LTE’s Basestation(eNB), is as shown in the Figure 1.4, and following features are 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 by connecting to UE wirelessly in accordance with “LTE Air standard”. eNB executes various functions including Tx/Rx of Wireless signal, Modulation/Demodulation of packet traffic, packet scheduling for efficient use of RF resources, HARQ (Hybrid Automatic Repeat Request) and ARQ (Automatic Repeat Request) process, PDCP(Packet Data Convergence Protocol) of compressed packet 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 subscriber plane between 2G, 3G 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 mobility between “LTE System” and “non3GPP Access Systems”, manages billing charges for different service levels, and handles

1-7

Samsung Multi-ModalSystem Abstract

management/modification of the throughput rate.

LSM (LTE System Manager)

LSM provides a synchronized interface for operator that Operation/Maintenance 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 function that is compatible with the operator OSS, 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 edge contains PCEF(Policy and Charging Enforcement Function), Policy 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.

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Smart MBS System Description

1.3 Samsung Multi-Modal System Feature

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

1.3.1CDMA System Feature

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

BSC

1xEV-DO

AN-AAA Client

SC/MM

Voice Handler

Paging Controller

A11 Handler

SUA Handler

IP Packet Forwarding

A10 Handler

Packet Classification

RLP Handler

1X Voice

ARQ

Abis

BTS

HARQ

IP Packet Forwarding

MAC

Packet Classification

PHY

Figure 1.5 CDMA System Functional Structure

BSC works with voice core equipments (MSCe, MGW) to manage signaling and bearer process for voice service. In BSC, SUA Handler is responsible for Alp signaling with MSCe, 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 bearer traffic of such data 1X Data and 1xEV-DO Data service. A11 Handler manages signaling for data service. RLP Handler manages ARQ feature for data communication.

For Authentication of 1xEV-DO terminal, AN-AAA client is responsible for synchronization 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 features such as high speed data service, multimedia service, new hand off, in accordance with standards defined in 3GPP2 C.S0024-0_v4.0, 3GPP2 C.S0024-A_v3.0, and 3GPP2 C.S0024-B_v3.0, 3GPP2 C.S0063-B_v1.0

1-9

Samsung Multi-ModalSystem Abstract

1.3.2LTE System Feature

Following Figure shows functional separation between eNB, MME, S-GW, P-GW of E-UTRAN in accordance with 3GPP standard. Generally, eNB manages “Connected mode” at AS(Access Stratum) level. MME manages Idle mode terminals in NAS(Non-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.

EPC

MME

S-GW

P-GW

NAS Security

Mobility Anchoring

UE IP address

allocation

Idle State Mobility

Handling

Packet Filtering

EPS Bearer Control

eNB (E-UTRAN)

Inter Cell RRM

RRC

RB Control

PDCP

Connection Mobility Control

RLC

Radio Admission Control

MAC

eNB Measurement Configuration & Provision

PHY

Dynamic Resource Allocation (Scheduler)

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 protocol layer of eNB can be divided into Layer1, Layer2, and Layer 3. Layer 3 contains RRC layer, Layer 2 contains three layers(MAC layer(sublayer), RLC layer, PDCP layer) where each layer executes an independent process. RRC layer belongs to layer 3 of the wireless protocol. Generally, RRC Layer is responsible for maintenance and control of RB(Radio Bearer), RRC connectivity, and Exchange of System Data. Meanwhile, PDCP layer is responsible for header compression of IP packet, security features like “ciphering/integrity check”, and “selective transmission feature” which can increase the efficiency of “radio resource”

RLC Layer is responsible a) for segmentation and reassembly at MAC Layer for data which was received 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 resources according to priority, multiplexes the data received

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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 handle “S1-AP signaling message”(of SCTP base; used to control connection between MME and eNB) AND “NAS Signaling message” (of SCTP base; used to control mobility and connection between terminal and EPC.) In addition, it works in conjunction with HSS to obtain subscriber information, modification, and authentication. It can work in conjunction with S- GW, as utilizing GTP-C protocol, to allocate bearer path (for data routing and forwarding, release, 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 between 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 mobility anchor when handover is executed between eNB, and 3GPP. As a supported function, packet data is “Routed”, “Forwarded”. Billing 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-GW supports GTP and PMIP protocol in conjunction with MME, P-GW, and SGSN.

P-GW(PDN Gateway)

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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Smart MBS System Description

Chapter 2. Smart MBS Abstract

2.1 Smart MBS System Description

Smart MBS is the Basestation of Samsung Multi-Modal System. It is managed by packet core (either BSC, or EPC), and makes call to terminal to create CDMA/LTE links.

Smart MBS interfaces with UE via either CDMA(3GPP2 CDMA2000 1X Advanced and 1xEV-DO Rev.0/Rev.A), or LTE(3GPP LTE Rel.8/9). It provides broadband high speed data service and multimedia services.

In order to implement this, Smart MBS can perform Modulation/Demodulation (for voice or packet traffic), assign Scheduling and Wireless Bandwidth (for efficient use of RF resources 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/EPC, provides Power Control, and executes system operation management.

By Fast Ethernet/Gigabit Ethernet backhaul, Smart MBS synchronize the control station to transceive reliable control signal and traffic signal.

Smart MBS is separated into UADU(Universal Platform Digital Unit, an indoor DU) and the RRH(Remote Radio Head, 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 following maximum capacity. Based on operator’s setup, it can be operated as omni type or sector type.

-	CDMA 1X / EVDO	: Max 8Carrier/3Sector(2Br)
		Max 6Carrier/3Sector(4Br)
-	LTE (FDD)	: Max 5Carrier/3Sector

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

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

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

Smart MBS has other features provided as below.

2-1

Smart MBS Abstract

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 MBS can simultaneously support multiple technologies in the same duplexing type 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 MBS has separated RRH from DU. Between RRH and DU, a fiber optic ‘Baseband I/Q and C&M’ interface, based on CPRI(Common Public Radio Interface), is used to send/receive “data traffic signal” and “OAM data”. DU 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 small & light weight single module. RRH can be mounted onto Walls, Poles, or Stands. In addition, distance between RRH and Antenna is minimized that RF signal loss(caused by Feeder Line) is decreased. Therefore, it can provide 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 dissipates heat without requirement of additional cooling mechanism. Also, no maintenance cost 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” between DU and RRH, Smart MBS provides Loop-back Test.

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 maintenance cost, and easily operate the system.

RRH may be replaced with firmware to enhance service and upgrade new features:

The remotely operated firmware which is able to downloading without visiting the site cover the functional software only like as RRH alarm, maintenance, security.

The Firmware downloading related RF Specification for RRH has a security system which could be accessible by manufacturer, only.

And, this could only be programmed through specific equipment or software in a factory.

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Smart MBS System Description

Provides Monitoring Port.

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

Support for Smooth Migration

Smart MBS can provide migration from CDMA to 4G(LTE )wireless telecommunication by either adding “traffic processor card and channel card” or “software upgrade”.

In case of RRH, in the same frequency band, simple Software upgrade would allow conversion into 4G wireless telecommunication. Also, simultaneous operation of 3G and 4G is possible.

Furthermore, following are the Smart MBS features per each wireless technology.

2.1.1 Smart MBS CDMA System Feature

Support for 1X Advanced

In order to improve voice capacity and data rate, Smart MBS supports “1X Advanced”.

In case of “1X Advanced”, EVRC-B, RLIC, QOF, New RC, QLIC, and MRD are implemented for voice capacity enhancement.

QChat

Smart MBS supports QChat(Qualcomm Chat) which is a PTT service that is based on 1xEV-DO. For QChat service, BSC/BTS runs in conjunction with QAS(QChat Application Server) and PDSN to exchange “signaling and bearer traffic” with terminal. QChat can support 1:1 call and group call, and reserve QoS(Quality of Service).

Provides Dual Band

Dual band is a feature that allows single basestation to provide different services in 2 different RF bandwidths. Smart MBS can simultaneously provide service on 800MHz band and 1.9GHz band. With exception of RRH, Smart MBS can utilize entire hardware to be shared for 2 bands. Smart MBS’s Digital Unit can provide up to maximum capacity of 12 Carrier/3 Sector(2Br) or 6Carrier/3Sector(4Br). For 1.9GHz, Smart MBS supports 4Br.

Tx/RX Diversity Support

In order to improve RRH-P4, Smart MBS optionally provides TDTD(Time Delay Transmit Diversity) feature that will transmit “CDMA Modem output of 1Tx” from “RF path of 2Tx”.

Also, in order to improve receive performance, d RRH-P4 provides 2 Branch receive diversity (which provides 2 receive path per each sector) as a standard. Optionally, Operator may choose that RRH-P4 can provide 4 Branch receive Diversity which will provide 4 receive paths.

2.1.3 Smart MBS LTE System Feature

OFDMA/SC-FDMA Technology

Smart MBS can handle downlink OFDMA/uplink SC-FDMA channel processing that supports the

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