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ZXUN uMAC Product Description
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. I
ZXUN uMAC Product Description
Version Date Author Approved By Remarks
V1.00
V1.1 Update
V1.2 Update
© 2012 ZTE Corporation. All rights reserved.
ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used without the prior written permission of ZTE.
Due to update and improvement of ZTE products and technologies, information in this document is subjected to change without notice.
The capacity indices mentioned by this document are derived under certain conditions, the actual capacity indices for business must be derived according to the actual traffic model and other requirements.
ZXUN uMAC Product Description
II © 2012 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary
TABLE OF CONTENTS
1 Overview ......................................................................................................... 1 1.1 Location and Functions of ZXUN uMAC ........................................................... 1 1.2 Interfaces and Protocols of ZXUN uMAC .......................................................... 4
2 Highlight Features .......................................................................................... 6 2.1 Advanced Design ............................................................................................. 6 2.2 Large Capacity & High Integration Unified All-IP Platform, Lesser TCO ............ 6 2.3 Common Elements for GSM/EDGE/UMTS and EPS ........................................ 7 2.4 Open Interface and Flexible Networking Capabilities ........................................ 7 2.5 Outstanding Reliability and Excellent Performance ........................................... 7 2.6 Abundant Service Functions ............................................................................. 8 2.7 Smooth Expansion Capabilities ........................................................................ 8 2.8 Convenient Operation Maintenance .................................................................. 8
3 Functionality ................................................................................................. 10
4 System Architecture ..................................................................................... 14 4.1 Product Physical Structure.............................................................................. 14 4.2 Hardware Architecture .................................................................................... 15 4.2.1 Hardware Structure of EPC Unified Platform .................................................. 15 4.2.2 ZXUN uMAC Hardware Structure ................................................................... 16 4.3 Software Architecture ..................................................................................... 18
5 Technical Specifications .............................................................................. 20 5.1 Physical Indices .............................................................................................. 20 5.1.1 Mechanical Dimension .................................................................................... 20 5.1.2 Weight and Floor Bearing ............................................................................... 20 5.1.3 Color ............................................................................................................... 20 5.2 Equipment Power ........................................................................................... 20 5.2.1 Power Supply Range ...................................................................................... 20 5.2.2 Power Consumption ....................................................................................... 21 5.3 Working Environment ..................................................................................... 21 5.3.1 Temperature and Humidity Requirements ...................................................... 21 5.3.2 Cleanness Requirements................................................................................ 21 5.3.3 Air Pollution Requirements ............................................................................. 21 5.4 Interface Indices ............................................................................................. 22 5.5 Capacity Indices ............................................................................................. 22 5.6 Clock Indices .................................................................................................. 23
6 Operation and Maintenance ......................................................................... 24 6.1 Configuration Management System ................................................................ 25 6.2 Alarm Management System ............................................................................ 26 6.3 Performance Management System ................................................................. 26 6.4 Diagnosis Test System ................................................................................... 26 6.5 Signaling Tracing System ............................................................................... 27 6.6 Service Observation System ........................................................................... 27 6.7 Variable Management System ........................................................................ 27
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. III
7 Reliability Design .......................................................................................... 28 7.1 System Reliability Design ............................................................................... 28 7.2 Hardware Reliability Design ............................................................................ 28 7.2.1 EMC Design ................................................................................................... 28 7.2.2 Simplification Design ...................................................................................... 29 7.2.3 Redundancy Design ....................................................................................... 29 7.2.4 Harsh Environment Resistance Design........................................................... 29
8 Networking .................................................................................................... 30
FIGURES
Figure 1 Location of ZXUN uMAC as SGSN in Mobile Network ....................................... 2
Figure 2 Location of ZXUN uMAC as MME in Mobile Network ......................................... 3
Figure 3 Location of ZXUN uMAC as SGSN/MME Combo in Mobile Network .................. 4
Figure 4 ZXUN uMAC cabinet appearance and dimension ............................................ 14
Figure 5 Front and back views of ZXUN uMAC chassis (E8280) .................................... 15
Figure 6 ZXUN uMAC Hardware Structure ..................................................................... 17
Figure 7 Software hierarchy ........................................................................................... 19
Figure 8 O&M System Structure ..................................................................................... 24
Figure 9 PS/EPS Backbone Network ............................................................................. 30
Figure 10 Networking Mode of xGW and uMAC Belonging to same LAN ......................... 32
TABLES
Table 1 Related Interfaces and Protocols of ZXUN uMAC .............................................. 4
Table 2 Environment Temperature and Humidity Requirements ................................... 21
Table 3 ZXUN uMAC Interface Indices ......................................................................... 22
Table 4 ZXUN uMAC Typical Capacity Indices ............................................................. 22
Table 5 ZXUN uMAC Clock Indices .............................................................................. 23
Table 6 ZXUN uMAC Reliability Indices ........................................................................ 28
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 1
1 Overview
1.1 Location and Functions of ZXUN uMAC
Integration of core network and access agnostic is the trend of mobile network.
Following the trend, ZTE provides an integrated control plane core network product,
ZXUN uMAC (unified Mobile Access Controller), which can support 2G, 3G and LTE
access. ZXUN uMAC can be deployed as SGSN, MME or SGSN/MME combo node to
satisfy different scenarios during the evolution to pure LTE/EPC.
Working as SGSN, ZXUN uMAC is the core of PS domain. It manages the access
control and transmits the packet data of mobile stations in its coverage area. It also
validates the subscriber’s location (in home network or visited network) through mobility
management executing radio resource management. It provides routing functions to
forward packet data between RNCs and also between SGSN and other GGSNs. In
addition, it collects charging data for CG and supports network management through
O&M.
Working as MME, ZXUN uMAC is the core of EPS. It manages the access control. It
also validates the subscriber’s location (in home network or visited network) through
mobility management. It executes bearer management and provides routing functions to
assist packet data forwarding between eNodeB and SAE-GWs.
Working as SGSN/MME combo node, ZXUN uMAC can provide SGSN and MME
function as described above.
The location of ZXUN uMAC working as SGSN in the network is as shown in Figure 1.
ZXUN uMAC Product Description
2 © 2012 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary
Figure 1 Location of ZXUN uMAC as SGSN in Mobile Network
The location of ZXUN uMAC working as MME in the network is as shown in Figure 2.
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 3
Figure 2 Location of ZXUN uMAC as MME in Mobile Network
HLR
SGSN
GGSN
RNC
NodeBBTS
BSC
BTS NodeB
eNodeBeNodeB
HSS
MME
PGW
SGW
PDN/IMS
Gi SGi
Gc
Gr
Gb
Iu-PS
S6a
S1-MME
S1-U
Abis
Um Uu
Iub X2
LTE-Uu
S12
Gn
GnS5
S11MME
S10
PCRFGx
GSM W/TDLTE
The location of the ZXUN uMAC working as SGSN/MME combo node in the network is
as shown in Figure 3.
ZXUN uMAC Product Description
4 © 2012 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary
Figure 3 Location of ZXUN uMAC as SGSN/MME Combo in Mobile Network
Z
XUN uMAC adopts module structure and executes different functions through different
modules. By combining modules in different ways, ZXUN uMAC can provide 2G Gb, 3G
Iu and LTE S1 access functions. In addition, it provides multiple physical interfaces such
as E1, Ethernet, ATM and POS to meet different requirements. Integrated with GPRS-
SSF function, ZXUN uMAC implements mobile intelligent service.
1.2 Interfaces and Protocols of ZXUN uMAC
The related interfaces, protocols and functions of ZXUN uMAC are listed in Table1.
Table 1 Related Interfaces and Protocols of ZXUN uMAC
Interworking NE
Interface Name
Protocol Interface Function
SGSN-BSS Gb BSSGP Connecting 2.5G BSS
SGSN-RNC Iu-PS RANAP/GTP
Connecting RNC
SGSN-MSC Server/VLR
Gs BSSAP+ Updating/paging the joint location of CS/PS, allocating TMSI
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 5
Interworking NE
Interface Name
Protocol Interface Function
SGSN-HLR Gr MAP Managing subscription attributes of packet subscribers
SGSN-SGSN Gn/Gp GTP Implementing mobility management between SGSNs
SGSN-SMS-GMSC Server
Gd MAP Processing short messages
SGSN-MSC/VLR
Gs BSSAP+ The interface between the Gn/Gp SGSN and the VLR. It uses the BSSAP+ protocol.
SGSN-EIR Gf MAP Processing IMEI Checking
SGSN-SCF Ge CAP This interface provides intelligent service control functions and realizes CAMEL.
SGSN-GGSN Gn/Gp GTP Managing tunnels of packet data subscribers
CG-GSN Ga GTP’ Collecting the GSN CDR in real time
MME-eNodeB S1-MME S1AP Accessing eNodeB for control plane
MME-HSS S6a Diameter Managing subscription attributes of packet subscribers
MME-MME S10 GTP Implementing mobility management between MME
MME-SGW S11 GTP Bearer management for UE
MME-Gn SGSN Gn GTP Implementing mobility management between SGSN and MME
MME-MSC SGs SGsAP Implementing CSFB function between MME and MSC
MME-EIR S13 Diameter IMEI check management between MME and EIR
MME-MSC Sv GTPv2 Implementing SRVCC function between MME and MSC
ZXUN uMAC Product Description
6 © 2012 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary
2 Highlight Features
2.1 Advanced Design
Designed in strict accordance with the 3GPP R8 specifications, besides MME function,
uMAC can integrate SGSN function to protect user’s investment.
The software is developed in strict accordance with the software engineering
requirements on the basis of the top downward, hierarchical and modular design
concept, which makes the software easily maintainable and expansible.
Utilize the advantages of various mobile switching systems at home and abroad; the
hardware structure, software structure and the integrated equipment expertise live up to
the state of arts of peer products.
The hardware design adopts the advanced Very Large-Scale Integrated (VLSI) Circuits
to reduce stand-alone components, improve the reliability and reduce the power
consumption.
The software adopts the hierarchical and modular structure, and works in the load
sharing mode. The load between modules is balanced dynamically, and the tasks are
taken over automatically.
The NE is based on unified all-IP software and hardware platform, which reduces the
system development and maintenance cost.
ZTE core network series are distributed processing platform and provide very high
expansibility. The whole system adopts the multi-level modular design to ensure the
easy installation of whole system and smooth expansion.
2.2 Large Capacity & High Integration Unified All-IP Platform, Lesser TCO
All CN products are based on All-IP unified hardware platform. Based on the advanced
hardware platform and technology, with the modular design, large capacity and high
integration are featured, which means less Equipment, and therefore less construction,
maintenance personnel & costs and power consumption.
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 7
2.3 Common Elements for GSM/EDGE/UMTS and EPS
ZXUN system provides support GSM/EDGE/UMTS and EPS services and subscribers
using same network elements. This ensures continuity for the existing GSM services. It
also facilitates an easy migration of the subscribers from GSM/EDGE/UMTS to EPS,
there are no changes in network topology or network element configurations during the
upgrades.
ZXUN system provides support access of BSS, UTRAN and E-UTRAN network
simultaneously. One unified core network can greatly reduce investment with resource
sharing:
� Signaling process, call process, switch resources etc, can be shared to save
investment and ensure smooth evolution.
� Soft capacity: During the evolution from 2G/3G to LTE, either 2G/3G or LTE user
number may increase suddenly. ZTE equipments can adjust the system resources
automatically to meet the 2G/3G and LTE capacity. It is based on any 2G/3G and
LTE service ratio. Therefore, the evolution may become smooth.
� Unified support and management system also can decrease investment.
� Facility such as transmission and equipment room can be shared
2.4 Open Interface and Flexible Networking Capabilities
ZXUN series provides open and standard interfaces. It supports GSM, 3GPP R99~R8,
networking and allows smooth upgrades and expansion.
IP, TDM, and ATM transport are supported. Thus, ZXUN series can be integrated into
any of the existing networks. A safe integration is also ensured by supporting the current
interfaces and signaling protocols towards the existing network elements.
2.5 Outstanding Reliability and Excellent Performance
Distributed processing design concept: The protocol processing units operate
independently to ensure excellent general performance. The failure of a unit does not
influence other processing units.
The high-performance processor chips ensure high processing capabilities of the system.
Network processor and high-performance embedded RISC processor are used in the
ZXUN uMAC Product Description
8 © 2012 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary
system to provide impetus and expansible communication functions for the system, and
prevent the processing capability from being a system bottleneck.
Perfect redundancy design:
� Key components such as service processing unit adopt 1+1 active/standby hot
backup mode, user plane processing units adopt N+M redundancy backup mode,
which provide automatic switching function and ensure uninterrupted running of
system.
� Interface boards can be deployed either in 1+1 active/standby mode or in load-
sharing mode.
� Intra chassis switching and communication adopt dual-star switching to avoid single
point failure.
� Hot plug-in is adopted for all boards for easy maintenance
� Multi-level of overload control mechanism and alarm function further ensure high
system reliability.
2.6 Abundant Service Functions
The system can support all PS data services, SMS service, mobile intelligent service,
and location service.
The system design meets the future communication development trend, and meets the
general structure requirements of mobile telecommunications systems such as EPS and
IN as well as the requirements of various new services.
2.7 Smooth Expansion Capabilities
Smooth evolution with Investment Protection: Since adopting the unified hardware,
hardware can be reserved when evolve from GSM/UMTS to LTE. So, hardware can be
shared and reused to protect hardware invests.
The system has hierarchical and modular structure and can be flexibly expanded and
applied. Flexible configuration is available for the user.
2.8 Convenient Operation Maintenance
B/S structure is adopted to ensure high networking capability and expandability of the
system.
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 9
The client embedded in browser provides user-friendly interfaces and flexible,
convenient and reliable operations.
It provides multiple remote and local system access ways. The O&M can be
implemented locally or remotely and can manage the whole system or some specific
entities.
It features reliable security and multi-level authorization protection.
With such functions as charging management, performance measurement, traffic
statistics, security management, service observation, user (equipment) tracing, signaling
tracing, data configuration, version upgrading, alarming, loading, data backup and
transmission, the system provides multiple accurate, reliable, practical and convenient
O&M approaches. In addition, functions can be added according to the actual network
operation and the operator’s requirements.
The O&M system provides user-friendly interfaces, comprehensive functionality and
flexible networking capability to implement centralized management over all kinds of
NEs of GSM/UMTS/LTE.
ZXUN uMAC Product Description
10 © 2012 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary
3 Functionality
ZXUN uMAC provides the following functions:
� Mobility Management
Mobility Management is one of the most essential basic functionalities in the mobile
network, enabling continuous service for the UE while subscriber is moving. Mobility
Management ensures the mobile aspect of the connection, including connection
over the radio interface, authentication, and routing area updates.
� Session Management
Session Management is one of the most essential basic functionalities in the mobile
network, enabling Internet Protocol (IP) data connections between the UE and the
network. It is responsible for allocating IP addresses for the connection, defining an
Access Point Name in the GGSN/PGW, and controlling PDP/Bearer contexts.
� QoS Management
Quality of Service is a basic function that allows operators to optimize the use of
network resources and accommodate traffic so that it satisfies the end-user needs.
Also, QoS makes it possible for operators to offer a richer variety of services and a
higher level of service personalization.
ZXUN uMAC can assign and limit different QoS to different subscribers classed by
IMSI ranges, e.g. if a roaming user subscribes in HLR a QoS of 256Kbps Max Bit
Rate, and IMSI is in the range with limit of 128Kbps MBR, then ZXUN uMAC
assigns QoS Less than or equal to 128Kbps MBR to the user, according to QoS
limit based on IMSI range.
� IMSI Range based Area Restriction
ZXUN uMAC can support IMSI range based area restriction. IMSI range can be
used to distinguish home subscribers and different VPLMN subscribers.
It allows operator to have the choice of restricting home subscribers or roaming
subscribers accessing in some route area or tracking area, e.g. restricting roaming
subscribers which have only 2G roaming agreement accessing from 3G network.
� IMSI Range based EPLMN List
ZXUN uMAC can configure IMSI range based EPLMN list, and then can send
different EPLMN list to subscribers in different IMSI ranges.
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 11
The maximum number of IMSI ranges is 16 and every IMSI range can be
configured with 15 EPLMNs.
� It allows subscribers to select other EPLMN that provides network service besides
their home PLMN. Multiple Access
ZXUN uMAC supports both Gb, Iu-PS, and S1 interfaces simultaneously to facilitate
2G/3G/LTE hybrid networking.
� Direct Tunnel Support
Direct Tunnel is deployed to separate Control Plane and User Plane in different
nodes to implement a flat network. After DT applies on UMTS network, User Plane
data transmits directly between RNC and GGSN, and SGSN is only responsible for
PDP contexts establishment and deletion. User Plane packets forwarding is no
longer in SGSN. Therefore network processing latency, which is especially
important for real-time services, is reduced. The flat architecture is also inline with
future network evolution.
� Short Message Service
SMS service is a text message service. ZXUN uMAC provides SMS services
including MS originated and MS terminated via MAP based Gd interface or SGsAp
based SGs interface.
� Mobile Intelligent Service
ZXUN uMAC supports CAMEL phase3 based intelligent service. It has SSP function
and can access mobile IN to provide multiple intelligent services for subscribers
including pre-paid service.
� IP Routing
The routing functions are needed on the Gn/Gp/S10/S11 interface to provide
connectivity to other GSNs (SGSNs/MME/GGSNs/SGW) and on Gb/Iu interface to
BSC and RNC if Gb/Iu over IP is adopted and on S1-MME interface to eNodeB.
ZXUN uMAC supports static routing as well as routing protocols including OSPF,
RIP, BGP and IS-IS.
� Lawful Interception
Lawful Interception (LI) ensures that the operator meets the local authority
requirements for interception of mobile user’s data call.
� Gb/Iu over IP
The Gb/Iu over IP feature makes it possible to transport Gb/Iu interface traffic on top
of IP. It is also helpful for the SGSN Pool networking to reduce transmission
resource requirement on Gb/Iu interface
ZXUN uMAC Product Description
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� SGSN Pool
BSC/RNC connects all the SGSNs in the pool at the same time. If any SGSN fails,
the load is redistributed to other SGSNs in the pool. Inter SGSN RAU is replaced by
intra SGSN RAU when user moves in the pool, so signaling interchange is reduced.
� GGSN Selection based Redundancy
SGSN selects GGSN from the GGSN address list returned by DNS according to the
GGSN priorities. GGSN of highest priority will be selected first, when this GGSN
fails, less high GGSN will be selected instead. Multiple GGSNs can be put in the
same priority class. In the same priority class, GGSNs are selected by load-sharing
rule. With this feature, GGSN redundancy can be implemented.
� SS7 over IP
SIGTRAN is used to support SS7 protocols be transported on IP network.
� SGSN Charging
ZXUN uMAC supports Ga interface to connect CG adopting GTP’ protocol. Various
CDRs are generated by SGSN including S-CDR, M-CDR, SM-MO-CDR and SM-
MT-CDR. Charging on both data volume and duration are supported.
� S1 Flex
The eNodeB connects all the MMEs in the pool at the same time. If any MME fails,
the load will be redistributed to other MMEs in the pool. Inter MME TAU is replaced
by intra MME TAU when user moving in the pool, so signaling interchange is
reduced.
� PDN-GW Selection
ZXUN uMAC selects PDN-GW from the PDN-GW list returned by DNS. PDN-GWs
are selected according to their priority, static weight, topology relation and
availability. With this feature, PDN-GW redundancy is achieved..
� Serving-GW Selection
ZXUN uMAC selects Serving-GW from the Serving-GW list returned by DNS.
Serving-GWs are selected according to their priority, static weight, topology relation
and availability. With this feature, Serving-GW redundancy is achieved.
� IPv4v6 Dual Stack
IPv6 is considered as the next generation internet protocol to overcome the
shortage of IPv4 address. 3GPP has chosen IPv6 as one type of address allocated
for UE. ZXUN uMAC as MME supports MS attach request for IPv4v6 DS PDN and
IPv4v6 type bearer activation request.
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 13
� CSFB
Voice service in LTE era can be realized by CS Fallback (CSFB). The CSFB
solution redirects LTE UE to 2G/3G CS domain upon detection of a voice call and
thus reusing the CS infrastructure to support voice calls.
� SRVCC
Voice service in LTE era can also be realized by IMS. When UE moves from LTE
coverage to 2/3G coverage, SRVCC (Single Radio Voice Call Continuity)
technology will transfer voice call to CS domain without any interruption.
ZXUN uMAC Product Description
14 © 2012 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary
4 System Architecture
4.1 Product Physical Structure
ZXUN uMAC system is installed in the standard 19-inch Cabinet which has the internal
space of 47U, containing power distribution chassis, fan chassis, service chassis, air
deflector and dustproof chassis. The Cabinet appearance is shown in the following
figure.
Figure 4 ZXUN uMAC cabinet appearance and dimension
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 15
ZXUN uMAC adopts ZTE E8280 chassis which is based on ZTE ETCA platform and
fully compatible to ATCA standards. The dimension of 11U E8280 chassis is: 482.6 mm
× 607 mm× 486.1mm (Width × Depth × Height). The front and back views of ZXUN
uMAC chassis are shown as follows:
Figure 5 Front and back views of ZXUN uMAC chassis (E8280)
4.2 Hardware Architecture
ZTE hardware platform principle: This hardware platform adopts All-IP architecture to
meet the needs of smooth upgrading of R99, R44, R5, R6, R7, and R8 network. In
addition, this platform uses advanced electronic technology to improve the system
integrity and reduce the network construction cost.
Various Network Elements involved in ZTE R99, R4, R5/R6/R7/R8 networks, such as
MME, MSC, SGSN, MGW, MSC Server, MGCF, CSCF, and HLR/HSS, all utilize the
same hardware platform and share the same boards. Thus the consistency and the
reliability of the system are ensured.
4.2.1 Hardware Structure of EPC Unified Platform
� Based on Unified Hardware Platform , Possessing High Stability and Maturity
ALL-IP unified hardware platform (V4) is adopted, which guarantees the
consistency, service portability, system reliability and stability of the hardware for
2G/3G/LTE systems.
� Large Capacity, High Integration and Investment Protection
With today’s increased traffic and Declining ARPU, network elements are required
to have high capacity and less footprint. ZXUN uMAC needs only three chassis to
support 15 million subscribers and uses less equipment room area and power
ZXUN uMAC Product Description
16 © 2012 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary
supply system. Thus ZTE CN saves the investment of network construction for
operator.
� All-IP Hardware Platform, Easy Migration to All-IP Network
ZXUN (V4) hardware platform are based on all-IP architecture, adopts high-
performance packet processing platform of Crossbar technology and provides
80Gbps switching capability, which guarantee that WCDMA/EPC nodes will have no
congestion of switching capability.
� Abundant Interfaces and Supporting Various Networking Scenarios
ZXUN CN equipment supports the access interfaces such as E1, ATM STM-1, SDH
STM-1, FE etc. and different networking scenarios based on the practical
requirements. ZXUN CN equipment supports various applications, such as 2G
SGSN, 3G SGSN, 2G&3G SGSN, 2G&3G SGSN and MME, Pure MME etc.
� Support LTE access, as well as handover and roaming between 2G/3G and LTE
systems
ZTE WCDMA CN equipment supports GSM/GPRS/UMTS/EPS access, intra-MSC,
intra-SGSN, intra-MME, inter-MSC (2G-MSC and 3G-MSC), inter-SGSN (2G-SGSN
and 3G-SGSN), inter-MME handover and roaming. Various tests results of ZTE’s
handover process between 2G/3G/LTE systems demonstrate ZTE CN products to
be the best in industry.
4.2.2 ZXUN uMAC Hardware Structure
ZXUN uMAC system is based on ZTE ETCA hardware architecture. ETCA architecture
is an improvement on ATCA. ETCA is fully compatible with ATCA and both of them are
according to PICMG3.0 standard. Unlike RTM (Rear Transit Module) in ATCA, ETCA
rear board has signal connection with backplane, it means rear board is independent of
front one. Rear boards in ETCA not only provide connectivity for the system, but also
provide link layer processing, media processing and storage modules, which
dramatically increase the functionalities in one chassis. Following figure illustrates
hardware structure of ZXUN uMAC.
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 17
Figure 6 ZXUN uMAC Hardware Structure
The ZXUN uMAC system is composed by following boards and modules:
1. PPBB0: Packet Processing Blade B0, it can be configured as UOMP, USMP or
USUP logical module to implement corresponding service function.
� UOMP: Universal Operation Main Processor, it implements system control and
routing management functions and supports 1+1 active/standby redundancy,
every uMAC system needs one pair of UOMPs.
� USMP: Universal Service Main Processor, it implements service signaling
processing in Control Plane and supports 1+1 active/standby redundancy.
� USUP: Universal SGSN User Plane Processor, it implements packets
forwarding in 2G and 3G SGSN User Plane and supports N+M backup
mechanism.
2. PPBX0: Packet Processing Blade X0, UOMM (Universal Operation and
Maintenance Module) is implemented on this board for network management. It
supports 1+1 active/standby redundancy and every uMAC system needs one pair
of UOMM.
ZXUN uMAC Product Description
18 © 2012 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary
3. MPI: Multi-Protocol Interface board, It can be configured as UIPB for IP connection
with 4 GE copper or optical ports, USPB/UFRB for SS7 and FR connection
respectively with 32 E1/T1 ports.
4. API: ATM Protocol Interface board, UAPB (Universal ATM Process Board) is
implemented on this board for ATM connection at Iu interface with 4 STM-1 ports or
1 STM-4 port. UIMA (Universal Inverse Multiplexing over ATM) is also implemented
on API for IMA access.
5. BSW: Base Switch,logical name for uMAC system is UBSW (Universal Base
Switch). UBSW is adopted for Control Plane packets switching in one chassis or
between different chassis. Every UBSW provides 1Gbps switching capacity for
every front or rear slot and provides 4Gbps for the switching between different
chassis. UBSW supports 1+1 load-sharing redundancy, 2 UBSWs double the
switching capacity.
6. FSW: Fabric Switch, logical name for UMAC system is UFSW (Universal Fabric
Switch). UFSW is adopted for Media Plane packets switching in one chassis or
between different chassis. Every UFSW provides 1 Gbps switching capacity for
every front slot, 2Gbps for every rear slot and 20Gbps (2*10GE) for the switching
between chassis. UFSW supports 1+1 load-sharing redundancy, 2 UFSW double
the switching capacity.
4.3 Software Architecture
ZXUN uMAC software has a modular and hierarchical structure. Invoking between layers
is unidirectional in the primitive mode, while invoking between the modules of the same
layer is in the message interface mode. The interfaces between modules and layers are
clear, concise, and are easy to be upgraded. The independence of modules and
community of interfaces is emphasized. The ZXUN uMAC consists of a series of
functional subsystems, which are independent of each other, and communicates with
each other with the message mechanism. Each subsystem can further be divided into
multiple functional modules.
The ZXUN uMAC software system is composed of the operation supporting & HW,
TULIP, Telecom Application. Fig. 7 shows the system hierarchy.
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 19
Figure 7 Software hierarchy
ZXUN-uMAC software consists of such subsystems as bottom-layer drive module (BSP),
running support subsystem, IP protocol stack, database subsystem, network
management subsystem and service processing subsystem.
The relationship between modules is shown in the above figure.
The OS&HW provides a operating system environment for other modules.
In TULIP part, there are subsystems that are described as follows:
IP protocol stack provides static route, dynamic route and built-in route functions to
connect with the upper-level route directly.
The network management subsystem implements operation, maintenance, performance
statistics, data configuration and fault management functions for the uMAC subsystem.
The database subsystem, on the basis of the OS, is independent of the application
database system. It uses the object-oriented relation data mode to manage the data,
including defining, describing, operating and maintaining the data table. It can flexibly
provide and perform the system data configuration and provide data configuration and
maintenance and other functions. It also stores and manages the subscriber data and
other information, providing the service processing subsystem with efficient and reliable
data service.
The Telecom application implements service functions for subscribers, including
activation and mobility management.
ZXUN uMAC Product Description
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5 Technical Specifications
5.1 Physical Indices
5.1.1 Mechanical Dimension
Outline dimension of cabinet:
2200mm * 600mm* 800mm (Height * Width * Depth)
5.1.2 Weight and Floor Bearing
The net weight of cabinet including power distribution module is 120kg.
The net weight of E8280 chassis with power module and fan array is 28kg
Full configured E8280 chassis is 95Kg
Floor bearing: Larger than 646kg/m2
5.1.3 Color
All sides of cabinet are dark blue (color code: ZX-01*02), except that frames and panel
are gray (color code: ZX-02*02).
5.2 Equipment Power
5.2.1 Power Supply Range
The system power supply is fully distributed. The power modules on the functional
boards convert and isolate -48V or -60V power supply into/from the power supply
needed by this board (such as +5V DC/+3.3V DC/+2.5V DC /+1.8V DC). In power board
design, the following factors are considered: EMC filtering, isolation, hot swappable,
power-on slow start, input over-current protection, output over-voltage protection and
power-on sequence.
Normal working voltage of the system: -60V to -40V for -48V,-72V to -50V for -60V.
For equipment with AC power as its primary power, such as a server, the nominal input
power is single-phase 220V AC power, the permitted input voltage ranges from 176V to
264V, and the frequency change ranges from 45 Hz to 65 Hz.
At the -48V or -60V power, inlet of the Cabinet is the power distribution module (PDM)
mounted at the top of the Cabinet. The EMC filter, the general power circuit breaker and
the circuit-breakers for the chassis are also installed at the inlet. The PDM module
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 21
supplies -48V or -60V power to service chassis and fan chassis individually through
independent busbar.
5.2.2 Power Consumption
The maximum power consumption of one chassis is less than 3500W
The maximum configuration of uMAC is 3 chassis in 2 cabinets. If the power
consumption is allowed, it is also possible to install 3 chassis in 1 cabinet.
5.3 Working Environment
5.3.1 Temperature and Humidity Requirements
The temperature and humidity requirements of the ZXUN uMAC are listed in Table 3.
Table 2 Environment Temperature and Humidity Requirements
Climatic Parameter
Normal Operating Condition
Exceptional Operating Condition
Temperature +5 to +40℃ -5 to 50℃
Relative Humidity 5 to 85% 5 to 90%
Absolute Humidity 1 to 25g/m3
1 to 25g/m3
Temperature Change
0.5℃/min 0.5℃/min
Note 1: The temperature and humidity of the operating environment inside the
equipment room are measured at the spot that is 1.5 m above the floor and 0.4 m in
front the equipment when there is no protective plate in front or back of the equipment
Cabinet.
Note 2: In exceptional Operating condition, equipment can keep operating for 96 hours
and the exceptional condition should not exceed 15 days in a year.
5.3.2 Cleanness Requirements
The concentration of dust particles with the diameter greater than 5µm should be ≤ 3 ×
104 particles/m3.
5.3.3 Air Pollution Requirements
Explosive, conductive, magneto conductive and corrosive dusts, as well as gases that
can corrode metal and affect insulation are not allowed.
ZXUN uMAC Product Description
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5.4 Interface Indices
Complied standards and supported cables by interfaces of ZXUN uMAC are listed in
Table 3.
Table 3 ZXUN uMAC Interface Indices
Interface Type Physical Standard Cable Types
Gn � 100Mbps/1000Mbps Ethernet
� Category-5 twisted
pair/optical fiber
Gb � E1
� 100Mbps/1000Mbps Ethernet
� Coaxial cable
� Category-5 twisted
pair/optical fiber
IuPS � 100Mbps/1000Mbps Ethernet
� STM-1
� Category-5 twisted
pair/optical fiber
� Fiber jumper LC/PC-LC/PC
Ga � 100Mbps/1000Mbps Ethernet
� Category-5 twisted
pair/optical fiber
Gr/Gf/Ge/Gs � E1
� 100Mbps/1000Mbps Ethernet
� Coaxial cable
� Category-5 twisted
pair/optical fiber
S1-MME /S11/S10/Sv
� 100Mbps/1000Mbps Ethernet
� Category-5 twisted pair/optical fiber
S6a/S13/SGs � 100Mbps/1000Mbps Ethernet
� Category-5 twisted
pair/optical fiber
Network management
� 100Mbps/1000Mbps Ethernet
� Category-5 twisted pair
5.5 Capacity Indices
Capacity indices of ZXUN uMAC are listed in Table 4.
Table 4 ZXUN uMAC Typical Capacity Indices
Technical Features
Parameter Specific Indices
Capacity indices
Simultaneously attached users 2G/3G:12M
LTE:15M
Simultaneously activated PDP Contexts
2G/3G:24M
LTE:30M
eNodeB supported 10000
SGW supported 1024
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 23
Data throughput Gb over IP: 6.8Gbps
Iu over IP: 25.5Gbps
Concurrent bearers activated by a UE
11
Signaling indices
64Kbps links 5000
2Mbps links 320
Signaling points 255
Interface indices
FE interface 120
GE interface 120
E1 interface 960
STM interface 120 STM-1
5.6 Clock Indices
Clock indices of ZXUN uMAC are listed in Table 5.
Table 5 ZXUN uMAC Clock Indices
Parameter Specific Indices
Clock Level Level-2 clock class A
Lowest clock accuracy ±4×10-7
Pull-in range ±4×10-7
Max. frequency deviation 10-9
/day
Initial max. frequency deviation
5×10-10
Clock working mode: Fast capture, locked, hold-over and free-run
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6 Operation and Maintenance
NMS comprises operation & maintenance center (OMC) and charging management
parts. OMC provides perfect authentication mechanism to avoid illegal access. The
OMC comprises O&M server and O&M client. Charging management part includes CG
processing unit, charging client, and charging OMM server. The structure of NMS is as
shown in Figure 6.
OMC has powerful management capability. It provides centralized control of different
kinds of NEs in GPRS/WCDMA/EPS with powerful networking capability. It also provides
the cascading control and the reverse operation. It realizes remote access by accessing
WAN via routers. Q3 NM interface standard provides powerful interface control for NM
centers and integrates graphic interface and command line processing methods.
Figure 8 O&M System Structure
LAN
LAN
Internet
Router
CG2
OMC server
2G/3G/LTE NE group 1
Printer
Operation terminal
Disk arrayCG1
Charging and
operation server
2G/3G/LTE NE group 2
Operation terminal Printer
Router
WWW server DNS
Mail server
Redirected CG groupFTAM/FTP
Remote terminal
CG2Disk arrayCG1 Redirected CG group
Charging center
Up-level NMC
The charging operation server provides centralized configuration and processing of
circuit domain and packet domain, and also provides powerful charging mechanism
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 25
control so as to satisfy the charging content requirements in charging content time, flow,
quality and service. The dual-system is adopted to guarantee that charging operation
server is running without interruption. The charging system provides diversified
interfaces and FTP and FTAM file transmission mode to output bill contents. According
to software structure, NM system is divided into foreground module, server module and
client module. The whole software frame complies with TMN (telecommunication
network management) structure.
NMS comprises the following functional modules:
� Configuration management
� Performance management
� Fault management
� Diagnosis and test,
� Service observation,
� Signaling tracing,
� Security management
� Charging management.
6.1 Configuration Management System
The configuration management system provides user-friendly interfaces for the
configuration and management of network resources. The configuration management
system provides centralized configuration and management of the different kinds of NEs
in GPRS/WCDMA/EPS such as the configuration and management of physical
equipment, switch and signaling, and at the same time provides tools for data
transmission, data backup and recovery, and system initial configuration.
Before data configuration, to guarantee the version has been correctly installed and runs
normally, it is necessary to confirm the following data:
� Entity type of the current exchange, which is uMAC here.
� Cabinet configuration of the current exchange.
� Signaling point type of the current exchange, GT (Global Title) and IP address.
� The configuration data of the neighboring office of the current exchange: the type,
signaling point and associated mode (associated or quasi-associated) of each
neighboring office, signaling link coding and DNS address configuration.
ZXUN uMAC Product Description
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6.2 Alarm Management System
The alarm management system consists of two parts: real-time current alarms display
and alarm-related operation.
6.3 Performance Management System
Current alarms of the device, communication, service and processor are displayed
through interfaces. Real-time display provides the detailed information of each alarm in
the list form, including alarm source, alarm level, alarm time, alarm content, alarm cause,
alarm type and additional information.
The performance management system provides statistic data about some performance
parameters and traffic data of the mobile system for reference by operation departments.
The maintenance client can define performance measurement flexibly. A performance
measurement job consists of the start/end time, days of duration, measurement object
set and granularity period. The maintenance client allows generating, deleting, modifing
and observing the performance measurement in real time.
The performance measurement has a wide coverage, ranging from traffic and signaling
performances, service quality measurement, network configuration verification,
availability measurement, throughput measurement and switching function
measurement.
6.4 Diagnosis Test System
The diagnosis test, a part of fault management, provides routine test and instant test for
the CS domain and PS domain devices of the core network for ensuring normal and
stable operation of the entire system. In daily maintenance, the diagnosis test is used to
test the physical devices and communication links through routine test. If the test result
is likely to be abnormal, the engineering personnel should pay enough attention to it and
take proper measures to avoid faults. In case of any fault, the diagnosis test helps the
engineering personnel in finding the fault cause and locating the fault quickly with the
instant test to remove the fault as soon as possible. This can also be used by the
engineering personnel to judge whether the equipment and even the entire system
resumes normal operation
ZXUN uMAC system adopts a multi-module & fully distributed control structure. Each
module consists of a series of basic units. The diagnosis test function is divided into
intra-module test and inter-module test. The intra-module test is used to test the
functions of the component units of the module, links between the units and MPs, and
speech channels between units and switching networks. The inter-module test is used to
test the communication and speech channels of the adjacent modules.
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 27
6.5 Signaling Tracing System
The signaling trace system performs tracing the signaling data of the network operation
and analyzes the service operation. It comprises No.7 signaling trace, circuit domain
signaling trace and packet domain signaling trace.
ZXUN uMAC signaling trace covers:
� Real time Tracing and displaying Diameter signaling, GTPC, S1AP signaling of S1-
uMAC interface and signaling of the S6a interface.
� Showing explanation for the signaling.
� Providing daily maintenance tools for data maintenance, such as tools for sorting,
filtering, searching and deleting the signaling trace records.
� Providing tools for reestablishing the database table for you to use to install the
database table for the first time or when the database table is damaged.
� Creating a new database table for the signaling trace record.
6.6 Service Observation System
The service observation system, as a part of the O&M system, is used to view the
service operation status of the NEs and conduct analysis and processing accordingly.
6.7 Variable Management System
The security variable system is used to maintain the service parameters that should be
modified dynamically. Currently, the parameters to be maintained are system control
parameter, EMM parameters, GTP parameters, SM parameters, packet domain NE
configuration parameters, authentication parameters and charging parameters.
The security variable functions modify data at the background and then transfer them to
synchronize the data of the foreground and the background, making the service
parameter configuration flexible.
The security variable system is used to configure the following parameters:
� System control parameters,
� Security parameters
� S1 interface parameters, and NE configuration parameters of packet domain
ZXUN uMAC Product Description
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7 Reliability Design
7.1 System Reliability Design
Table 6 ZXUN uMAC Reliability Indices
Parameter Specific Indices
Mean Time Between Failures (MTBF) 148000hours
System Mean Time To Repair (MTTR) <30 minutes
System availability (A) >99.999%
System annual average interruption time <5 minutes
7.2 Hardware Reliability Design
7.2.1 EMC Design
EMC design of ZXUN uMAC system involves filtering, grounding, overlapping and
cabinet electromagnetic shielding. EMI power filter and lightening arrestor are used for
the power cables of the overall system. Filters are at the input/output terminals of power
modules boards.
Boards and parts must satisfy Grade B requirements of ESD air discharge ± 8KV and
touch discharge ± 6KV. To satisfy the requirements, the following measures should be
taken in addition to overlapping and shielding:
� Grounding points should be plenty and well distributed. They are well distributed on
the in-board sockets.
� Components (except indicators and switches) should be kept at a proper distance
from the panel (> 10 mm), away from panel edge.
� Holes for indicators and switches should be of proper size and there should be no
excessive gap.
� There is no wire alongside the panel edge. Any wire (except the indicator wire)
should be at least 5 ~ 10 mm away from the panel edge.
� The clock cable runs inside, not on the top or the bottom and should be as short as
possible.
� The devices to be used should be of high ESD protection level. Normally the ESD
of a device should be at least 2000V.
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 29
� The grounding wire layer should be larger than the boundary of the wires and
components. At the panel side, the grounding wires should be installed with at least
5mm spacing.
� The wires on the backplane must undergo crosstalk emulation Signal lines of high
working frequency should be suppressed and shielded as necessary.
� Boards and parts should bear anti-static labels.
7.2.2 Simplification Design
For the purpose of reliability, the system is designed in the following principles:
Simplifying the system structure and board circuits, reducing the quantity of devices on
the board, specifying uniform board signal definitions and implementing uniform
backplane design so that relevant function boards can be reused and mixed.
Reuse function and compatibility are fully recognized. For example, multiple function
boards are integrated into one board, and circuits of the same functions are integrated
into one standard circuit. Use more general-purpose devices/parts. General purpose
here means the compatibility inside this system and with other products. Units and
modules of the systems are designed according to relevant industry standards.
7.2.3 Redundancy Design
Redundancy design of the system is used for key-boards backup. Boards are backed up
as follows:
The Ethernet switching board, OMP and control plane service processing board are
exclusively backed up in 1+1 mode. The active/standby boards send "Heartbeat" signals
to each other through the internal Ethernet to detect the status of the other. The
changeover follows the active/standby changeover mechanism of the system. The active
and standby boards can not be online / offline at the same time and their data are
synchronized through the internal Ethernet.
The interface board is backed up in load-sharing mode.
7.2.4 Harsh Environment Resistance Design
ZXUN uMAC is an indoor product, which should be installed in the central equipment
room of good conditions. Air-conditioning is required. Thus, the product is not required to
be moisture-proof, smoke-proof, mould-proof, burglar-proof and water-proof. It is not
necessary to do “3Proof” processing to the boards.
To prevent any damage in shipping and storage, cabinets are well protected. The
cabinet surface is dust-proof and corrosion-proof.
Boards are shipped in the cabinet. Therefore cabinets are packed in vacuum pads and
shockproof foams. Since the cabinets are heavy, they are shipped in moisture-proof
crates.
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8 Networking
ZXUN uMAC is a functional entity to establish the connection between eNodeB to PDN-
GWs. The configuration and networking of uMAC are very flexible.
The national PS network backbone comprises several regional nodes that are
connected to each other in mesh. A pair of top-level Domain Name Servers (DNS) is
configured on the national network, responsible for domain names that cannot be
translated by provincial DNS. The provincial networks access the backbone network
nodes through Routers. Routers are usually set in pairs, for accessing different
backbone nodes to ensure the network reliability.
The logic structure of the national backbone network is as shown in Figure 9.
Figure 9 PS/EPS Backbone Network
When the EPS backbone network based on the national IP backbone network, no new
routing device is necessary. But when it does not depend on the national IP backbone
network, the regional nodes can be connected through the dedicated line.
There are multiple networking schemes for the provincial PS backbone network
construction.
When there is an IP backbone network in a province, the uMAC serves as the node to
access the IP backbone network.
When there is no IP backbone network in the province, the provincial backbone network
may have one or multiple backbone nodes according to the capacity at the beginning of
the network construction. When the needs for the PS are not great and are centralized in
only a few cities, the uMAC and SAE-GW in these cities are usually connected through
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ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 31
the LAN in order to reduce the cost and speed up the network construction. In some
local networks, there are only SAE-GW but no uMACs. In this case, the provincial
network accesses the national backbone network through the routers and the local
networks can be connected through the dedicated leased circuit.
In a signaling network, the uMAC communicates with HLR through the SS7 network.
This network is simple in structure and provides the packet service throughout the
province quickly.
If the need for the EPS is great, there will be many backbone nodes in the province. The
backbone nodes are responsible for service convergence in some areas and they are
interconnected into a mesh network. The provincial backbone network is connected to
the national backbone network. If there is an IP backbone network in the province, the
uMACs are directly connected to the IP backbone network.
The following configuration modes for the EPS local network construction are available
according to the EPS volume.
Mode 1: The uMAC is needed in the local network, but the SAE-GW is not needed.
Mode 2: Multiple uMAC and SAE-GW are needed in the local network.
In Mode 1, only the uMAC is configured in the local network and different local networks
share one SAE-GW. In this case, the uMAC is only responsible for the EPS subscribers
in the local network. The uMAC is connected to the outside through the provincial
backbone nodes.
In Mode 2, there is a great need for the EPS in the local network, so multiple
uMACs/SAE-GWs should be set. All the nodes can be placed together to connect each
other through the LAN or placed separately through the MAN.
At the initial stage of EPS network construction, the capacities of the uMAC and SAE-
GW are small, so they can be combined into one in structure (but they are two entities to
outside). The combined uMAC provides WAN S11 and SGi interfaces for other uMACs
and SAE-GWs, but uses an Ethernet interface for the local SAE-GW. The S11 interface
between the combined uMAC and SAE-GW adopts the standard protocol. When
combined into one, no separate Cabinet are installed for the SAE-GW. In this case, as
the SAE-GW capacity is small, the uMAC and SAE-GW can use one router to connect
the EPS backbone network or the external PDN.
The networking structure of the SAE-GW and the uMAC in the same LAN is as shown in
Figure 10.
ZXUN uMAC Product Description
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Figure 10 Networking Mode of xGW and uMAC Belonging to same LAN
ZXUN-xGW
Firewall
ZXUN-
uMAC
IW/GMSC
MSCS /VLR
HSS/HLR/AUC
No7 signaling
network
Internet
GERAN/UTRAN/
EUTRAN
IP backbone
IP
backbone
DHCP ZXWN-CG ZXWN-OMCDNS
If the address pool mode is used or the IP address of the mobile phone is static, then the
DHCP server is not necessary. In addition, as the uMAC and SAE-GW are both
connected to the EPS backbone network, the DNS can be the DNS on the EPS
backbone network.
The independent networking mode is often used. In this mode, the ZXUN uMAC is
connected to the ZXUN uMAC or others vendors’ uMAC through the EPS backbone
network.
ZXUN uMAC Product Description
ZTE Confidential Proprietary © 2012 ZTE Corporation. All rights reserved. 33
Acronyms and Abbreviations
Name Explanation
2G Second Generation
3G the third Generation mobile communications
3GPP Third Generation Partnership Project
3GPP2 Third Generation Partnership Project 2
ATM Asynchronous Transfer Mode
AUC Authentication Center
AVP Attribute Value Pair
BOSS Business Operator and Supporting System
BSC Base Station Controller
CAMEL Customized Application for Mobile network Enhanced Logic
CAP CAMEL Application Part
CAPEX Capital Expenditure
CBC Content Based Charging
CCG Content based Charging Gateway
CDMA Code Division Multiple Access
CDMA2000 Code Division Multiple Access-2000
CG Charge Gateway
CN Core Network
CS Circuit Service
CSCF Call Session Control Function
EIR Equipment Identity Register
EPS Evolved Packet System
EUTRAN Evolved Universal Terrestrial Radio Access Network
FTP File Transfer Protocol
GGSN Gateway GPRS Support Node
GPRS General Packet Radio Service
ZXUN uMAC Product Description
34 © 2012 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary
GSM Global System for Mobile communications
HLR Home Location Register
HSS Home Subscriber Server
IM-SSF IMS – Service Switch Function
IMS IP Multimedia Subsystem
IMSI International Mobile Subscriber Identity
IOT Inter-Operation Test
ITU International Telecom Union
LAI Location Area Identity
MAP Mobile Application Part
MME Mobility Management Entity
MMS Multimedia Message Services
MS Mobile Station
MSC Mobile Switching Center
MTBF Mean Time Between Failures
MSISDN MS ISDN
NAT Network Address Translation
NM Network Management
NRI Network Resource Identifier
OMC Operation and Maintenance Center
OCS Online Charging System
OPEX Operating Expense
PDP Packet Data Protoco1
PLMN Public Land Mobile Network
POS Packet Over SONET/SDH
PS Packet Service
QoS Quality of Service
R99 3GPP Release V.99
R5 3GPP Release V.5
R4 3GPP Release V.4
ZXUN uMAC Product Description
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RADIUS Remote Authentication Dial In User Service
RAN Radio Access Network
RANAP Radio Access Network Application Part
RNC Radio Network Controller
RNS Radio Network Subsystem
RRU Remote Radio Unit
SCTP Stream Control Transmission Protocol
SGW Serving Gateway
SGSN Serving GPRS Support Node
SIGTRAN Signaling Transport
SMS Short Message Service
SMSC Short Message Service Center
SMTP Simple Mail Transfer Protocol
SS7 Signaling System Number 7
TCP/IP Transmission Control Protocol/Internet Protocol
TD-SCDMA Time Division Synchronous Code Division Multiple Access
UMTS Universal mobile telecommunication system
WAP Wireless Application Part
WCDMA Wideband Code Division Multiple Access
ZXUN ZTE unified core network
ZXUN GGSN The GGSN in ZTE unified core network subsystem
ZXUN SGSN The SGSN in ZTE unified core network subsystem
ZXUN HLR/AUC The HLR/AUC in ZTE unified core network subsystem
ZXUN MGW The MGW in ZTE unified core network subsystem