Samsung RFD01P-13A User Manual

Radio Access Network

LTE eNB

System Description

Describes an overview of the Samsung system, working, and all major functionalities.

Document Version 2.0

April 2017

Document Number: 2600-00KGZQGA2

© 2017 SAMSUNG Electronics Co., Ltd.

All Rights Reserved. The contents of this document/presentation contain proprietary information that must be kept confidential. No part of this document shall be photocopied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means whether, electronic, mechanical, or otherwise without the prior written permission of SAMSUNG Electronics Co., Ltd.

No warranty of accuracy is given concerning the contents of the information contained in this publication. To the extent permitted by law no liability (including liability to any person by reason of negligence) will be accepted by SAMSUNG Electronics Co., Ltd., its subsidiaries or employees for any direct or indirect loss or damage caused by omissions from or inaccuracies in this document. SAMSUNG Electronics Co., Ltd. reserves the right to change details in this publication without notice.

SNMTC-v3-0312

This manual should be read and used as a guideline for properly installing and/or operating the product. Owing to product variations across the range, any illustrations and photographs used in this manual may not be a wholly accurate depiction of the actual products you are using.

This manual may be changed for system improvement, standardization and other technical reasons without prior notice.

Samsung Networks documentation is available at http://www.samsungdocs.com

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Contents

Preface		vi
	Conventions in this Document ........................................................................................................	vi
	New and Changed Information ......................................................................................................	vii
	Revision History..............................................................................................................................	vii
	Organization of This Document .....................................................................................................	viii
	Personal and Product Safety ...........................................................................................................	ix
Chapter 1	Samsung LTE System Overview	1
	Introduction to Samsung LTE System...............................................................................................	1
	Samsung LTE Network Configuration...............................................................................................	4
	Protocol Stack between NEs ............................................................................................................	7
Chapter 2	LTE eNB Overview	12
	Introduction to System ..................................................................................................................	12
	Main Functions...............................................................................................................................	14
	Physical Layer Processing ..........................................................................................................	14
	Call Processing Function ............................................................................................................	18
	IP Processing ..............................................................................................................................	20
	SON Function .............................................................................................................................	20
	Easy Operation and Maintenance .............................................................................................	22
	Specifications .................................................................................................................................	24
Chapter 3	System Structure	27
	Hardware Structure........................................................................................................................	27
	CDU............................................................................................................................................	27
	RRH (LTE FDD, 700 MHz) ...........................................................................................................	30
	Power Supply .............................................................................................................................	32
	Cooling Structure .......................................................................................................................	33
	External Interface ......................................................................................................................	34
	Software Structure .........................................................................................................................	37
	Basic Software Structure............................................................................................................	37
	CPS Block....................................................................................................................................	40
	OAM Blocks................................................................................................................................	44
Chapter 4	Message Flow	48
	Data Traffic Flow ............................................................................................................................	48
	Network Sync Flow.........................................................................................................................	49
	Alarm Signal Flow...........................................................................................................................	49
	Loading Flow ..................................................................................................................................	51
	Operation and Maintenance Message Flow ..................................................................................	52
	Web-EMT ...................................................................................................................................	52
	CLI ..............................................................................................................................................	53
Appendix	Acronyms	55

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List of Figures

Figure 1.	Functional Distinctions of E-UTRAN and EPC ...................................................................................	2
Figure 2.	Samsung LTE System Architectures .................................................................................................	4
Figure 3.	Protocol Stack between UE and eNB ...............................................................................................	7
Figure 4.	Protocol Stack between eNB and S-GW User Plane.........................................................................	8
Figure 5.	Protocol Stack between eNB and MME Control Plane ....................................................................	8
Figure 6.	Inter-eNB User Plane Protocol Stack................................................................................................	9
Figure 7.	Inter-eNB Control Plane Protocol Stack ...........................................................................................	9
Figure 8.	Interface Protocol Stack between eNB and LSM ...........................................................................	10
Figure 9.	Protocol Stack between eNB and MCE Server ...............................................................................	10
Figure 10.	Protocol Stack between MCE Server and MME .............................................................................	11
Figure 11.	Protocol Stack between MCE Server and LSM ...............................................................................	11
Figure 12.	Internal Configuration of eNB ........................................................................................................	27
Figure 13.	CDU Configuration (CDU) ...............................................................................................................	28
Figure 14.	RRH Configuration (RFD01P-13A) ..................................................................................................	31
Figure 15.	RET Interface ..................................................................................................................................	32
Figure 16.	Power Supply Configuration ..........................................................................................................	33
Figure 17.	Cooling Structure of CDU ...............................................................................................................	34
Figure 18.	LMD1 External Interface ................................................................................................................	34
Figure 19.	LCC4 External Interface ..................................................................................................................	35
Figure 20.	RFD01P-13A External Interface......................................................................................................	36
Figure 21.	eNB Software Structure .................................................................................................................	37
Figure 22.	CPS Structure..................................................................................................................................	40
Figure 23.	OAM Structure ...............................................................................................................................	44
Figure 24.	Data Traffic Flow ............................................................................................................................	48
Figure 25.	Network Synchronization Flow ......................................................................................................	49
Figure 26.	Alarm Flow .....................................................................................................................................	50
Figure 27.	Loading Signal Flow........................................................................................................................	51
Figure 28.	Operation and Maintenance Signal Flow .......................................................................................	52
Figure 29.	Web-EMT Interface ........................................................................................................................	53

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List of Tables

Table 1.	Key Specifications...........................................................................................................................	24
Table 2.	Input Power....................................................................................................................................	24
Table 3.	Dimensions and Weight .................................................................................................................	25
Table 4.	GPSR Specifications........................................................................................................................	25
Table 5.	CDU Ambient Conditions ...............................................................................................................	25
Table 6.	LTE FDD 4Tx/4Rx RU Specification (RFD01P-13A)..........................................................................	25
Table 7.	Key Features and Configuration.....................................................................................................	28
Table 8.	LMD1 Unit Description...................................................................................................................	34
Table 9.	LCC4 Unit Description ....................................................................................................................	35
Table 10.	RRH External Interface (RFD01P-13A)............................................................................................	36
Table 11.	Alarms ............................................................................................................................................	49
Table 12.	Reset Commands ...........................................................................................................................	50

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Preface

This description describes the characteristics, features and structure of the

Samsung LTE eNB.

Conventions in this Document

Samsung Networks product documentation uses the following conventions.

Symbols

Symbol Description

Indicates a task.

Indicates a shortcut or an alternative method.

Provides additional information.

Provides information or instructions that you should follow to avoid service failure or damage to equipment.

Provides information or instructions that you should follow to avoid personal injury or fatality.

Provides antistatic precautions that you should observe.

Menu Commands

menu | command

This indicates that you must select a command on a menu, where menu is the name of the menu, and command is the name of the command on that menu.

File Names and Paths

These are indicated by a bold typeface. For example:

Copy filename.txt into the /home/folder1/folder2/bin/ folder.

User Input and Console Screen Output Text

Input and output text is presented in the Courier font. For example, context <designated epc-context-name>

CLI commands are presented in bold small caps. For example,

Type the RTRV-NE-STS command in the input field.

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Preface

New and Changed Information

This section describes information that has been added/changed since the previous publication of this manual.

Technical contents changes.

Revision History

The following table lists all versions of this document.

Document Number		Product/Software		Document	Publication Date	Remarks
		Version		Version
2600-00KGZQGA2		LTE eNB	1.0		April 2017	First Version
2600-00KGZQGA2		LTE eNB	2.0		April 2017	-

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Preface

Organization of This Document

Section	Title		Description
Chapter 1	Samsung LTE		Introduction to Samsung LTE System
	System Overview		Samsung LTE Network Configuration
			Intersystem Interface
Chapter 2	LTE eNB Overview		Introduction to system
			Main functions
			Specifications
Chapter 3	System Structure		Hardware structure
			Software structure
Chapter 4	Message Flow		Data Traffic Flow
			Network Sync Flow
			Alarm Signal Flow
			Loading Flow
			Operation and Maintenance Message Flow
Appendix	Acronyms		This appendix lists acronyms used in this document.

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Preface

Personal and Product Safety

Proposition 65 (US Only)

State of California Proposition 65 Warning (US only)

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

California USA Only

This Perchlorate warning applies only to primary CR (Manganese Dioxide) Lithium coin cell batteries in the product sold or distributed ONLY in California USA.

Perchlorate Material-special handling may apply. See www.dtsc.ca.gov/hazardous waste/perchlorate.

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Chapter 1 Samsung LTE

System Overview

Introduction to Samsung LTE System

Samsung LTE system supports 3GPP LTE (hereinafter, LTE) based services.

The LTE is a next generation wireless network system which solves the disadvantages of existing 3GPP mobile systems allows high-speed data service at low cost regardless of time and place.

Samsung LTE system supports Orthogonal Frequency Division Multiple Access (OFDMA) for downlink, Single Carrier (SC) Frequency Division Multiple Access (FDMA) for uplink, and scalable bandwidths for various spectrum allocation and provides high-speed data service. It also provides high-performance hardware for improved system performance and capacity and supports various functions and services.

Samsung LTE system is based on the Rel-8 and Rel-9 standards of LTE 3rd

Generation Partnership Project (3GPP).

Samsung LTE system consists of evolved UTRAN Node B (eNB), Evolved Packet Core (EPC) and LTE System Manager (LSM).

The eNB exists between EPC and User Equipment (UE). It establishes wireless connections with UE and processes packet calls according to LTE air interface standard. The eNB manages UE in connected mode at the Access Stratum (AS) level. The EPC is the system, which is located between eNB and Packet Data Network (PDN) to perform various control functions. The EPC consists of Mobility Management Entity (MME), Serving Gateway (S-GW), and PDN Gateway (P-GW). The MME manages UE in idle mode at the Non-Access Stratum (NAS) level. Also, S-GW and P-GW manages user data at the NAS level and interworks with other networks.

The LSM provides man-machine interface; manages the software, configuration, performance, and failures. Also, it acts as a Self-Organizing Network (SON) server.

The figure below shows the functional distinctions between eNB of E-UTRAN, MME, S-GW, and P-GW according to the 3GPP standard. The eNB has a layer structure and EPC has no layer.

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Chapter 1 Samsung LTE System Overview

Figure 1. Functional Distinctions of E-UTRAN and EPC

eNB

The eNB is a logical network component of Evolved UTRAN (E-UTRAN), which is located on access side in LTE system.

The eNBs can be interconnected with each other by X2 interface. The eNBs are connected by S1 interface to Evolved Packet Core (EPC).

The wireless protocol layer of eNB is divided into layer 2 and layer 3. The layer 2 is subdivided into Media Access Control (MAC) layer, Radio Link Control (RLC) layer, and PDCP layer, each of which performs independent functions. Also, layer3 has Radio Resource Control (RRC) layer.

The MAC layer distributes air resources to each bearer according to its priority. Also, it performs multiplexing function and HARQ function for the data, which is received from the multiple upper logical channels.

The RLC layer performs the following functions:

Segments and reassembles the data, which is received from PDCP layer under the size specified by MAC layer

Requests retransmission to recover if data transmission fails in the lower layer (ARQ)

Reorders the data recovered by performing HARQ in MAC layer (re-ordering) The PDCP layer performs the following functions:

Header compression and decompression

Encrypts/decrypts user plane and control plane data

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Chapter 1 Samsung LTE System Overview

Protects and verifies the integrity of control plane data

Transmits data including sequence number related function

Removes data and redundant data based on a timer

The RRC layer performs mobility management within the wireless access network, maintaining and control of Radio Bearer (RB), RRC connection management, and system information transmission, and so on.

MME

The MME interworks with E-UTRAN (eNB) to process the Stream Control Transmission Protocol (SCTP)-based S1 Application Protocol (S1-AP) signalling messages for controlling call connections between MME and eNB. Also, MME process the SCTP-based NAS signalling messages for controlling mobility connection and call connection between UE and EPC.

The MME is responsible for collecting/modifying the user information and authenticating the user by interworking with HSS. It is also responsible for requesting the allocation/release/change of the bearer path for data routing and retransmission with GTP-C protocol by interworking with S-GW.

The MME interworks with 2G and 3G systems, Mobile Switching Center (MSC), and Serving GPRS Support Node (SGSN) for providing mobility and Handover (HO), Circuit Service (CS) fallback, and Short Message Service (SMS).

The MME is responsible for inter-eNB mobility, idle mode UE reachability, Tracking Area (TA) list management, choosing P-GW/S-GW, authentication, and bearer management.

The MME supports mobility during inter-eNB handover and inter-MME handover. It also supports SGSN selection function upon handover to 2G or 3G 3GPP network.

S-GW

The S-GW acts as the mobility anchor during inter-eNB handover and inter-3GPP handover, and routes and forwards user data packets. The S-GW allows the operator to apply application-specific charging policies to UE, PDN or QCI and manages the packet transmission layers for uplink/downlink data.

The S-GW also supports GPRS Tunnelling Protocol (GTP) and Proxy Mobile IP (PMIP) by interworking with MME, P-GW, and SGSN.

PDN Gateway (P-GW)

The P-GW is responsible for charging and bearer policy according to the policy and manages charging and transmission rate according to the service level by interworking with PCRF. The P-GW also performs packet filtering for each user, IP address allocation for each UE, and downlink data packet transmission layer management.

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Chapter 1 Samsung LTE System Overview

Samsung LTE Network Configuration

Samsung LTE system consists of eNB, LSM, and EPC. Also, it comprising multiple eNBs and EPCs (MME, S-GW/P-GW) is a subnet of PDN, which allows User Equipment (UE) to access external networks. In addition, Samsung LTE system provides LSM and self-optimization function for operation and maintenance of eNBs.

The following figure shows Samsung LTE system architecture:

Figure 2. Samsung LTE System Architectures

	PDN
	BM-SC	Gy
	EPC			OCS
	Gz
OFCS		Gx	PCRF
	P-GW	S10		Sp
Gz	(MBMS GW)
TL1	S5/S8	S6a
	S11
EMS	S-GW	MME		HSS
CSM		M3
	S1-U	S1-MME
				MCE
		M2
SNMP/FTP/UDP		X2-C
EMS
		X2-U
LSM	eNB		eNB
				Uu
RMI
			UE	UE

MSS

eNB

The eNB is located between UE and EPC. It processes packet calls by connecting to UE wirelessly according to LTE air standard. The eNB is responsible for transmission and receipt of wireless signals, modulation and demodulation of packet traffic signals, packet scheduling for efficient utilization of wireless

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Chapter 1 Samsung LTE System Overview

resources, Hybrid Automatic Repeat Request (HARQ)/ARQ processing, Packet Data Convergence Protocol (PDCP) for packet header compression, and wireless resources control.

In addition, eNB performs handover by interworking with EPC.

EPC

The EPC is a system, which is located between eNB and PDN. The subcomponents of EPC are MME, S-GW and P-GW, Multimedia Broadcast/Multicast Service Gateway (MBMS GW).

MME: Processes control messages using the NAS signaling protocol with eNB and performs control plane functions such as UE mobility management, tracking area list management, and bearer and session management.

S-GW: Acts as the anchor for user plane between 2G/3G access system, LTE system, and manages and changes the packet transmission layer for downlink/uplink data.

P-GW: Allocates an IP address to UE, acts as the anchor for mobility between LTE and non-3GPP access systems, and manages/changes charging and transmission rate according to the service level.

LTE System Manager (LSM)

The LSM provides user interface for the operator to operate and maintain eNB.

The LSM is responsible for software management, configuration management, performance management and fault management, and acts as a SON server.

Core System Manager (CSM)

The CSM provides user interface for the operator to operate and maintain MME, S-GW, and P-GW.

Master SON Server (MSS)

The MSS interoperates with local SON server as its higher node, making optimized interoperation possible for the multi-LSM. The MSS can work with Operating Support System (OSS) of the service provider who can decide whether to link them.

Home Subscriber Server (HSS)

The HSS is a database management system that stores and manages the parameters and location information for all registered mobile subscribers. The HSS manages key data such as the mobile subscriber’s access capability, basic services and supplementary services, and provides a routing function to the subscribed receivers.

Policy and Charging Rule Function (PCRF)

The PCRF server creates policy rules to dynamically apply the QoS and charging

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Chapter 1 Samsung LTE System Overview

policies differentiated by service flow, or creates the policy rules that can be applied commonly to multiple service flows. The P-GW includes Policy and Charging Enforcement Function (PCEF), which allows application of policy rules received from PCRF to each service flow.

Online Charging System (OCS)

The OCS collects online charging information by interfacing with S-GW and P- GW.

When a subscriber for whom online charging information is required makes a call, P-GW transmits and receives the subscriber’s charging information by interworking with OCS.

Offline Charging System (OFCS)

The OFCS collects offline charging information by interfacing with S-GW and P- GW.

The OFCS uses GTP’ (Gz) or Diameter (Rf) interface to interface with S-GW and P-GW.

Multi-cell/Multicast Coordination Entity (MCE)

The MCE is located between MME and eNB. It is responsible for session control signaling, admission control, radio resource allocations for eMBMS. M2 and M3 interface is used to interwork with eNB and MME.

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Chapter 1 Samsung LTE System Overview

Protocol Stack between NEs

The inter-NE protocol stack of the eNB is as follows:

Protocol Stack between UE and eNB

The user plane protocol layer consists of PDCP, RLC, MAC, and PHY layers.

The user plane is responsible for transmission of user data (e.g. IP packets) received from the upper layer. In user plane, all protocols are terminated in eNB.

The control plane protocol layer is composed of the NAS layer, RRC layer, PDCP layer, RLC layer, MAC layer, and PHY layer. The NAS layer is located on the upper wireless protocol. It performs UE authentication between UE and MME, security control, and paging and mobility management of UE in LTE IDLE mode.

In control plane, all protocols except for the NAS signal are terminated in eNB.

Figure 3. Protocol Stack between UE and eNB

Protocol Stack between eNB and EPC

The eNB and EPC are connected physically through FE and GE method, and the connection specification should satisfy LTE S1-U and S1-MME interface.

In user plane, GTP-User (GTP-U) is used as the upper layer of the IP layer; and in Control plane, SCTP is used as the upper layer of the IP layer.

The figure below shows the user plane protocol stack between eNB and S-GW:

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Chapter 1 Samsung LTE System Overview

Figure 4. Protocol Stack between eNB and S-GW User Plane

Figure 5. Protocol Stack between eNB and MME Control Plane

Inter-eNB Protocol Stack

The two eNBs are connected physically through FE and GE method, and the connection specification should satisfy LTE X2 interface.

The following figure shows the inter-eNB user plane protocol stack:

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Chapter 1 Samsung LTE System Overview

Figure 6. Inter-eNB User Plane Protocol Stack

The following figure shows the control plane protocol stack:

Figure 7. Inter-eNB Control Plane Protocol Stack

Protocol Stack between eNB and LSM

The FE and GE are used for the physical connection between eNB and LSM, and connection specifications must satisfy FTP/SNMP interface.

The following figure shows the user plane protocol stack between eNB and LSM:

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Chapter 1 Samsung LTE System Overview

Figure 8. Interface Protocol Stack between eNB and LSM

Protocol Stack between eNB and MCE Server

The eNB must provide the interface for the interoperation with the MCE server.

GE is used for physical connection between the eNB and MCE server. The connection specification must satisfy the STCP interface.

Figure 9. Protocol Stack between eNB and MCE Server

Protocol Stack between MCE Server and MME

GE is used for physical connection between the MME and MCE server. The connection specification must satisfy the STCP interface. The protocol stack between the MCE server and MME is as follows:

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Chapter 1 Samsung LTE System Overview

Figure 10. Protocol Stack between MCE Server and MME

Protocol Stack between MCE Server and LSM

GE is used for physical connection between the LSM and MCE server. The connection specification must satisfy the FTP/SNMP/UDP interface. The following diagram shows the interface protocol stack between the MCE server and LSM.

Figure 11. Protocol Stack between MCE Server and LSM

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Chapter 2 LTE eNB Overview

Introduction to System

In LTE system, eNB is located between UE and EPC. The eNB provides mobile communications services to subscribers according to LTE air interface standard.

The eNB transmits/receives radio signals to/from UE and processes the modulation and demodulation of packet traffic signals. The eNB is also responsible for packet scheduling and radio bandwidth allocation and performs handover via interface with EPC.

The eNB consists of Digital Unit (DU) and Radio Unit (RU).

The CDU is a digital unit (19-inch shelf) and can be mounted into indoor or outdoor 19-inch commercial rack.

The RRH is a RF integration module consisting of a transceiver, power amplifier, and filter. It transmits and receives traffic, clock information, and alarm/control messages to and from the CDU. The RRH has 4Tx/4Rx, 2Tx/4Rx or 2Tx/2Rx configurations supporting optic CPRI and can be installed on outdoor wall or pole.

The main features of eNB are as follows:

High Compatibility and Interoperability

The eNB complies with the specifications released based on the 3GPP standard. So, it has high compatibility and interoperability.

High-Performance Modular Structure

The eNB has high-performance with the use of high-performance processors. It is easy to upgrade hardware and software because of its modular structure.

Support for Advanced RF and Antenna Solutions

The eNB adopts the power amplifier to support wideband operation bandwidth and Multiple Input Multiple Output (MIMO).

Separation of CDU and RRH

The eNB consists of CDU and RRH separately for easy installation and flexible network configuration. In case of connection between CDU and RRH, data traffic signals and OAM information are transmitted/received through the Digital I/Q and C & M interface based on the Common Public Radio Interface (CPRI). Physically, optic cables are used.

The CDU and RRH are supplied DC -48 V DC power from a rectifier respectively.

Flexible Network Configuration

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