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Vol. 13 No. 6 I s s u e 1 3 7 Dec Special Topic: Wired Broadband Construction of National Broadband Networks P6 Embracing the 100G Era P11 TeliaSonera: Green Broadband for a Green Country P16
Operation Insight
3 European Broadband Access Business Model
Many European operators are putting the broadband access
business model into practice. After speeding up broadband
connection, they have built intelligent networks to increase
network value, reduce TCO, and create new revenue sources.
3
Tech Forum
6 Construction of National Broadband Networks
An open access platform and wholesale business model are
fundamental for building a national broadband network. These help
create a fair competitive environment for operators and retail service
providers and also offer more options to users.
6
9 A Discussion on OFDM-PON
Solutions
11 Embracing the 100G Era
11
Through the joint efforts of the IEEE, ITU-T and OIF, 100G standards
have been drafted. Vendors worldwide have released or will soon
release their 100G products, and the 100G DWDM era is just around
the corner. ZTE is now ready for 100G commercialization.
13 C-RAN Bearer Network Solution
13
Editorial Board
Success Stories Editor-in-Chief: Jiang Hua
Deputy Editor-in-Chief: Huang Xinming
16 TeliaSonera: Green Broadband for a Green Country Editorial Director: Liu Yang
Executive Editor: Yue Lihua
Editor: Paul Sleswick
18 Beltelecom: Creating a National Broadband Strategy Circulation Manager: Wang Pingping
in Belarus
Subscription / Customer Services
Subscription to ZTE TECHNOLOGIES
is free of charge
Tel: +86-551-5533356
Fax: +86-551-5850139
Email: wang.pingping@zte.com.cn
16 Website: wwwen.zte.com.cn/endata/magazine
20 Editorial Office
Address: NO. 55, Hi-tech Road South,
20 Telkom Kenya Makes Changes with Orange ShenZhen, P.R.China
Postcode: 518057
Tel: +86-755-26775211
22 Hi3G Simplifies Network O&M with NetNumen U31 Fax: +86-755-26775217
Email: yue.lihua@zte.com.cn
Third Eye ZTE Profile
ZTE is a leading global provider of
24 ZTE: Banking on the TD-LTE Market telecommunications equipment and network
solutions. It has the widest and most complete
product range in the world—covering virtually
every sector of the wireline, wireless, service
News Brief and terminals markets. The company delivers
innovative, custom-made products and services
27 Frost & Sullivan Recognizes ZTE as 2011 LTE Vendor to over 500 operators in more than 140 countries,
helping them achieve continued revenue
of the Year growth and shape the future of the world’s
communications.
28 ZTE Debuts World’s First Cloud-Based U-Safety
Government Security Solution
2 ZTE TECHNOLOGIES December 2011
Operation Insight
European Broadband Access
Business Model
By Liu Feng
Competitive Pressure and better quality of experience (QoE) 2015 OTT-centered video services will
A
at a lower price and in shorter time than account for 50% of all Internet traffic, and
s the EU further opens up
their rivals. To rally against competition point-to-point (P2P), storage, and Web
fixed access infrastructure
from emerging telecom and cable browsing services will make up the other
and formulates policies
operators, traditional fixed operators have 50%. Since P2P and storage services
for future broadband coverage, many
worked out broadband plans. BT has an are difficult to manage, operators focus
emerging telecom, cable, and mobile
NGA initiative and DT has also devised a their attention on OTT and IPTV. The
operators are entering the fixed
GPON 2.0 plan. most pressing issue is adjusting network
broadband sector. Revenue from fixed
voice is declining because of increased architecture so that it offers custom-
mobile usage, so fixed broadband―a Service-Driven Force made OTT services with end-to-end QoS
major source of future revenue for In recent years, over-the-top (OTT) and QoE guarantee. In this way, OTT
traditional operators―will surely services have developed rapidly and services are no longer transparent to their
become more competitive. Operators are will eventually replace IPTV and digital networks. To get a slice of the OTT pie,
most concerned about offering higher TV as mainstream video services in traditional operators have adjusted their
bandwidth, better quality of service (QoS), the future. Informa forecasts that by network architectures. Telefonica has
December 2011 ZTE TECHNOLOGIES 3
Operation Insight
deployed a unified content distribution multimedia services driven by the growth further streamlines the existing O&M
network (CDN), TeliaSonera has built of HDTV and 3DTV. Operators in Europe process and cuts OPEX and labor costs.
its own OTT platform, and DT has have a clear objective of broadband Mobile backhaul over PON enables fixed-
defined its MPLS deployment in its development. The EU aims to have 100% mobile convergence in the last mile and
GPON 2.0 plan. broadband coverage by 2013 and to helps operators increase network efficiency
Faced with stiff competition and increase coverage bandwidth to 30Mbps and reduce overall construction costs.
driven by emerging services, traditional for all Europeans by 2020. It also aims
fixed operators in Europe have chosen the to have 50% of all European households Intelligent network to generate new
following paths for network development: subscribed to Internet connections above revenue streams. A unified CDN is built,
100Mbps. To reach this goal, existing and access network interfaces and APIs
Future-proofing access networks need to be immediately are open to ICPs and ISPs. A smart pipe
building broadband access networks reconstructed. Most operators in Europe is also set up to ensure differentiated end-
with super-high bandwidth to meet are boosting bandwidth for future- to-end QoS and to allow operators, ICPs
EU requirements for future broadband proof access networks by shortening the and ISPs to share the OTT value chain.
coverage and video bandwidth length of last mile and adopting FTTH/ An intelligent home network connects all
GPON+NG PON or FTTC/VDSL2 home appliances and electronic devices
Resilience and intelligence technologies. through a service gateway and also serves
leveraging the advantages of network
as a media sharing center that allows
infrastructure to extend the network’s Simplified network to reduce OPEX. streaming media to be shared by all digital
value to cloud (service side) and PON technologies are being introduced to devices. All these household electronic
terminals (home network side) simplify the existing network. Less central devices are controlled through a unified
offering differentiated service assurance office sites and active optical nodes are visual user interface. This improves user
to users, content providers, and service used. Future-proof NGOSS architecture experience and stickiness.
providers through an end-to-end
intelligent network
QoS-based charging as opposed to
bandwidth-based charging.
Benefits to Operators
ZTE cooperates closely with
European operators and understands
broadband trends on the continent.
ZTE has proposed a European fixed
broadband business model based on
terminal-pipe-cloud architecture.
This business model brings European
operators the following benefits:
Fast broadband connection to support
video growth. Video has dominated
4 ZTE TECHNOLOGIES December 2011
Fast deployment to shorten time to Openness: Uni NGA supports broadband generate new revenue streams with an
market. Network construction solutions access over copper and fiber and allows innovative business model.
are tailored to market environments and for smooth evolution to NG PON.
network conditions. This ensures that This meets EU requirements for full
Success Cases
operators get a head start in the broadband and open competition. Operators can Many European operators are putting
access market through fast network jointly build and operate an FTTx the broadband access business model into
construction and service provision. network, which reduces construction practice. After speeding up broadband
In areas with a good copper network, costs and risks and increases network connection, they have built intelligent
existing copper resources can be used efficiency. networks to increase network value, reduce
to quickly offer super-high bandwidth Intelligence: Uni NGA allows operators
TCO, and create new revenue sources.
through VDSL2. In areas requiring new to transform from being an extensive
In Lithuania, ZTE customized an
network construction, operators can dumb pipe to an optimized smart
FTTH solution for TEO, a subsidiary of
deploy cutting-edge fiber technology to pipe. Dynamic service assurance
TeliaSonera. By offering speeds of up to
quickly deliver FTTH services and to provides better service awareness and
100Mbps, the solution pushed Lithuania
grab a large share of the market. adaptive QoS. Quality-based charging
into the top 3 countries in the world
is implemented through enhanced
for average data speeds. TEO was also
service differentiation, accurate traffic
Uni NGA recognized by the Lithuanian government
detection, and on-demand service
ZTE’s Uni NGA is tailor-made as the greenest enterprise because of its
provision. An innovative business
for operators in Europe and meets deployment of the green FTTH network.
model with an end-to-end smart pipe
network requirements of European In the UK, ZTE helped local operators,
at its core allows operators to benefit
fixed broadband business models. The including IFNL, build FTTH networks
from both downstream users and
solution is based on a terminal-pipe-cloud using GPON. Supported by the EU’s
upstream ISPs and ICPs.
architecture and focuses on integration, unified plan and policies of the UK,
L o w T C O : Wo r k i n g o n t h e
openness, intelligence and low TCO. It the FTTH networks provide broadband
principle of “less consumption,
also provides operators with end-to-end access in rural areas, promote competition
lower cost and better life”, ZTE
QoS and security guarantee. in the local broadband access market, and
helps operators build low-TCO
Integration: ZTE’s future-proof unified boost local economies.
networks with green technology
broadband access platform enables full- In Germany, ZTE and DT have
and equipment. ZTE’s custom-
service access and full-scenario coverage. worked closely to develop a custom-
made, future-proof solution protects
The platform supports access to both made GPON solution that further
operator investments and reduces
existing services, such as ISDN, and simplifies DT’s network structure. MPLS
network construction costs. A green
future video-centered broadband services.
network with intelligent and unified was introduced to make the network
It supports a diverse range of access
O&M also reduces OPEX. more intelligent. The solution enabled
media, including copper wires and fibers,
DT to provide all SPs with end-to-end
and various application scenarios, such Speeding up broadband connection security and QoS guarantee. Through the
as FTTH, FTTB, FTTC and FTTN. In is a core goal for operators. ZTE’s Uni enhanced user awareness and experience,
addition to fixed broadband services, it NGA solution helps operators boost DT has maintained its leading position in
provides data traffic offload and mobile network performance with an integrated,
the German market.
backhaul through WLAN. intelligent, and low-TCO solution and
December 2011 ZTE TECHNOLOGIES 5
Tech Forum
Construction of National
Broadband Networks
By Xie Jun
Trends divide, create employment, and push and regions had broadband strategies. The
A
national broadband network forward economic recovery. In recent US, UK, and Australia have released their
( N B N ) i s a c o u n t r y ’s years, there has been an upsurge in specific plans for broadband development
telecommunication NBN construction around the world. that include goals, policies and specific
infrastructure and differs from a Some countries have even published measures. Governments are now
regular broadband network built by their national strategies for broadband playing an increasingly important role in
a telecom operator. The backbone of development. broadband development.
an NBN can be newly constructed By the end of March 2011, 98 countries
or it can be based on the existing
network of the country’s leading
t e l e c o m o p e r a t o r. D e d i c a t e d
networks, such as an e-government
network, enterprise network,
education network, and military
network, can be supplements.
With high-speed Internet access,
there is an increasing demand for high-
bandwidth HDTV and 3D-TV. This is
driving the world’s leading telecom
operators to build networks with higher
bandwidth. The digital economy will be
an important part of the future global
economic system as governments seek
to develop new industries to stimulate
consumption, narrow the digital Figure 1. National broadband plans for some countries.
6 ZTE TECHNOLOGIES December 2011
Features operators, equipment vendors, RSPs and Model 2: Portugal and France
Despite differences in strategic goals, stakeholders. RSPs purchase bandwidth use this model. In Portugal, the
choice of technology, and construction from network operators and compete telecommunications regulator,
models, NBNs in different countries have with each other on the same platform Anacom, makes the open access rules.
some common features. to provide competitive and attractive Physical pipe resources in the network
services for end users. The open access are open. Through competition, the
High bandwidth. A basic requirement network comprises four layers: physical infrastructure at layer 1 is
of an NBN is to provide ultra-high leased to each RSP for construction
bandwidth that can cater to the needs Layer 1: physical infrastructure and operation at layer 2, layer 3 and
of high-bandwidth services into the (including communication pipes, layer 4. In France, ARCEP is the
future. Singapore’s Intelligent Nation poles and enclosures) that is typically telecommunications regulator. France
2015 Plan (iN2015) will be put in managed by an infrastructure operator Telecom builds physical infrastructure
place by 2012. It will be capable (I.O.) and leases it to each RSP for
of delivering broadband speeds of Layer 2: physical fibers that are built construction and operation at layer 2,
up to 1Gbps and offer bandwidth- and operated by a network operator layer 3, and layer 4.
intensive applications such as video (N.O.) Model 3: The UK uses this model. The
conferencing, video surveillance, Layer 3: active infrastructure (including UK telecommunications regulator,
streaming media, and HDTV. physical network equipment such as Ofcom, makes detailed open access
Open architecture. An NBN requires OLTs and ONTs) that is typically built rules. British Telecom is C.O., N.O., and
open network architecture rather and operated by a communications I.O. and opens the network to RSPs in a
than simple network scale-up. Open operator (C.O.) bitstream mode.
network architecture provides an open Layer 4: retail services (including The bitstream model significantly
platform that encourages competition voice, data and video services) that lowers the RSP qualifications and
between small- and mid-sized ISPs are provided by RSPs. offers diverse and competitive service
and CSPs. options to end users. This model
Convergence. An NBN must allow Open access is widely used for has been adopted by Malaysia and
for fixed-mobile convergence, building NBNs. There are five open Australia for their NBN projects.
interoperability between telecom access models. Model 4: Holland uses this model.
and private networks, transition from Rigerfiber is the N.O. and I.O. and
narrowband to broadband networks, Model 1: an operator’s self-built opens the network to other RSPs.
and unified scheduling of diverse infrastructure―the traditional network Model 5: Singapore uses this model.
services. buildout model. Singapore’s telecommunications
Environmental friendliness. An
NBN is part of a country’s long term
strategy and must be environmentally
RSP RSP RSP RSP
friendly.
RSP
RSP RSP
C.O
Construction Model
C.O C.O
N.O N.O C.O
Self-Built
An open access platform and wholesale Infrastructure
C.O
business model are fundamental for N.O
building an NBN. These help create a fair I.O
N.O N.O
competitive environment for operators I.O I.O
I.O
and retail service providers (RSPs) and
also offer more options to users. ① ② ③ ④ ⑤
Open access is a new network More Sharing
construction model. An open access
network can be jointly built by network Figure 2. Open access model options.
December 2011 ZTE TECHNOLOGIES 7
Tech Forum
regulator, IDA, makes detailed open
access rules. OpenNet is N.O. and
I.O., responsible for providing passive
infrastructure. Nucleus Connect,
a subsidiary of Starhub, provides
equipment and is responsible for
building active infrastructure and
leasing it to RSPs in a bitstream mode.
In these five open access construction
models, model 2 and model 4 have
physical openness at layer 1 and layer 2.
These models are not very different from
a traditional model in terms of equipment.
However, model 3 and model 5, where
RSPs and C.O. are separated, have a
brand-new wholesale bitstream mode.
These models place higher requirements
on network equipment.
Considerations
Government influence and policy
support
Governments are playing an increasingly
important role in constructing and operating
NBNs. Countries that have done well in
their NBN development have clear and
consistent broadband policies. South Korea
started its NBN initiative in the mid 1980s
and worked out six broadband plans. They
are the preliminary shape of the Korean
broadband strategy. Japan also laid down
its e-Japan strategy in 2001 and perfected
it in subsequent years. Broadband policies acquisition, and permission to access Narrowband voice networks prevail in
and strategies for different countries are mainstream operator networks. Although most countries around the world, and
market regulation, market efficiency, and broadband development varies from existing infrastructure, including ODNs,
prevalence and equity of broadband access. country to country, equity of broadband local communications pipes and copper
access (to ensure all users in urban and cables, need to be swapped or upgraded
Fair and efficient market mechanism under-developed areas have access to meet the broadband needs. A feasible
Full competition is key to success in to broadband) is a key issue that all network swapover and upgrade solution
the broadband network market. Countries governments have to consider. that can be implemented phase by
that have been successful in deploying phase and that is suitable for different
NBNs all have complete policies and areas is a technical guarantee for NBN.
laws that encourage market competition. Technical solution Any technical solution must also be
These include a free license management Networks are evolving from low-rate environmentally friendly.
mechanism, convenient wireless resource narrowband to high-speed broadband.
8 ZTE TECHNOLOGIES December 2011A Discussion on OFDM-PON
By Zhang Peihua
I
nnovation in network technologies is
driving the growth of IPTV, HDTV,
3DTV, mobile media, and streaming
video. To meet the corresponding
explosion in bandwidth demand, 40G
and 100G optical systems have been
commercially deployed at the backbone
layer. 400G/1T systems are also being
researched. The access layer must be
capable of handling increased traffic
and supporting many more services.
Currently, access networks are passive
optical networks (PONs) with a tree
structure; in particular, TDM-PON has
been widely applied. EPON and GPON Figure 1. NG-PON2 roadmap.
are suitable for FTTx networks. The 10G
xPON standard and industry chain have multiplexing (OFDM) in optical programmed to implement DFT/IDFT
matured, and 10G xPON will become communications is innovative. OFDM as well as digital-to-analog or analog-to-
a mainstream technology for FTTx is a multicarrier transmission technique digital conversion. Most system functions,
networks in the next five years. that dynamically allocates high-speed excluding RF front-end and antenna, are
NG-PON2, a long-term PON solution, serial bit streams to subcarriers with software-implemented. The advantages of
is a hot topic being discussed by ITU-T overlapping spectra to improve spectral using software are flexibility, ease of use,
and FSAN. Most operators expect NG- efficiency. High-order modulation accurate computing, reconfigurability, and
PON2 to provide higher bandwidth, schemes such as PSK and QAM are efficient digital signal processing.
higher split ratio, longer transmission used for these subcarriers. This enhances OFDM can be used as a modulation
distance, and greater access capacity system capacity. OFDM is effective in technique to increase spectral efficiency
while making full use of existing optical eliminating inter-symbol interference and channel capacity. It can also
distribution networks. Technology options caused by multipath and chromatic eliminate multipath and dispersion
for NG-PON2 include WDM-PON, dispersion in transmission links.It effects. Subcarriers can be used to enable
OFDM-PON, TWDM-PON, and high- increases symbol length and uses cyclic OFDMA and to allow flexible bandwidth
speed TDMA-PON. prefixes. OFDM modulation incorporates allocation for multiple subscribers and
Orthogonal frequency division software defined radio. DSP chips are services. Different subcarriers can be
December 2011 ZTE TECHNOLOGIES 9Tech Forum
allocated to subscribers or services such
as TDM, FTTH, FTTB, mobile station,
WiMAX repeater, and WiFi hot spots. ONU
These features make OFDM applicable to
access networks (Fig. 2).
OFDM has been successfully applied ONU
to ADSL, DVB-T, WLAN and WiMAX
and is a core transmission technology
ONU
for next generation wireless systems
including 3GPP LTE. OFDM-PON OLT
dynamically allocates bandwidth and has ONU
superior transmission capability. Cheaper
electronic devices are used instead of
costly optical devices, and ASIC based ONU
DSP and AD/DA also reduce equipment
costs. OFDM-PON can be combined Figure 2. OFDM-based multiservice access.
with WDM and has therefore become a
competitive technology for NG-PON2.
converged. In other words, OFDM polarization-mode dispersion in optical
Combining OFDM and PON has the
supports access to baseband OFDM, links. Therefore, OFDM-PON can be
following advantages:
UWB (MB-OFDM), WiMAX or used to smoothly evolve optical access
WiFi, and millimeter-wave OFDM networks to ultra-longhaul access
Dynamic allocation of subcarriers. signals. This significantly increases the networks.
Depending on channel environments universality of access networks. Avoiding costly optical devices and
and application scenarios, OFDM Enhanced spectral efficiency. Because using cheaper electronic devices.
can dynamically allocate the number of orthogonality between subcarriers, Integrated optical devices are very
of bits carried by each subcarrier, the OFDM allows spectral overlap of costly, and optical modules of 10G
modulation scheme used by each individual subchannels. OFDM also or higher can significantly drive up
subcarrier, and the transmitting power uses a simple constellation mapping the cost of an access network. OFDM
of each subcarrier. It does this by using algorithm for high-order modulation avoids costly optical devices and uses
a simple FFT algorithm. In OFDM- schemes such as 16QAM and 8PSK. cheaper electronic devices. OFDM
PON, allocation of each subcarrier OFDM in PON makes effective use leverages the integration and low-
occurs in real time according to access of spectral resources and improves cost advantages of high-speed digital
distance, subscriber type, and access spectral efficiency. This lays a solid signal processors and high-frequency
service. Uncomplicated protocols help foundation for WDM-PON to be microwave devices to develop access
optimize the access network. upgraded to DWDM-PON and networks and make them more
Converged wireline and wireless UDWDM-PON. popular.
access. An optical access network Smooth evolution to ultra-long-haul
has enormous bandwidth potential access network. A simple network Work on NG-PON2 is progressing
and good QoS but lacks mobility structure improves the performance of well in FSAN. An NG-PON2 white paper
and is unable to meet the diverse an access network and reduces costs. is expected to be released in early 2012.
requirements of different terminals. Converged MAN and PON access has ZTE led research into key techniques
A wireless access network is more become a hot topic in recent years, and for OFDM-PON in China’s “863”
flexible and mobile but has poor QoS. ultra-longhaul access networks (longer program and “tri-network convergence”
OFDM is a mature technology in than 80km) have been proposed. The project. OFDM-PON prototype will be
wireless communications that has been primary issue for ultra-longhaul access completed by the end of 2013. ZTE has
applied to WiMAX, WiFi and UWB. is reducing the effect of fiber chromatic been actively involved in standardization
By using OFDM to carry PON signals, dispersion. Theoretically, OFDM of NG-PON2.
wireline and wireless access can be signals are free from chromatic and
10 ZTE TECHNOLOGIES December 2011Solutions
Embracing the100G Era
By Shi Sheping
A
ccording to data released by the system has the following features: Core chips in the system are
OIF, the average annual traffic The system uses PM-QPSK modulation, manufactured using a cutting-edge
growth of network operators is coherent demodulation, and equalization/ 40nm CMOS process. This process
much higher than their revenue growth. compensation. An optical receiver can allows the system to be highly
Operators have to reduce cost per unit of tolerate chromatic dispersion of up to integrated, consume less power, and
traffic to relieve revenue pressure. The 50,000ps/nm and polarization mode have better signal processing capability
most effective means of lowering TCO is dispersion of over 90ns. This means than the 65nm CMOS process. High
to improve system transmission capacity. that chromatic dispersion compensation integration enables advanced soft-
Through the joint efforts of the IEEE, modules (DCMs) for fiber links do decision forward error correction (SD-
ITU-T and OIF, 100G standards have not need to be used. The engineering FEC), which allows for much higher
been drafted. Vendors worldwide have and OAM are also simplified in 100G error-correction performance than
released or will soon release their 100G DWDM equipment. the commonly-used hard-decision
products, and the 100G DWDM era is The system supports 80 channels in FEC. In the system, OSNR tolerance
just around the corner. the C-band with the same 50GHz is increased by about 2dB, and
channel spacing used in 10G and transmission capacity is increased by
Ready for 100G Commercialization 40G DWDM systems. Transmission about 60%. The system can transmit
Mature 100G standards will pave the capacity reaches up to 8Tb/s, ten times over more than 1500km (20×22dB)
way for widespread 100G deployment. ZTE the capacity of a 10G DWDM system. without electronic regeneration. The
has rolled out an advanced 100G DWDM This meets the increasing demand transmission distance is close to that of
solution to meet the need for large-scale for data services and ensures longer a 10G DWDM system.
commercial 100G. ZTE’s 100G DWDM equipment lifecycle. ZTE is now ready for 100G
December 2011 ZTE TECHNOLOGIES 11Solutions
commercialization. The company and Fig. 3). With each subcarrier bearing
cooperated with operators in testing 100Gb/s optical signals, the experiment
its 100G DWDM products, and good realized optical signals with a single-channel
results were achieved. With the world’s rate of 11.2Tb/s (10Tb/s net line rate plus
best high-performance 100G DWDM overheads such as FEC).
products, ZTE offers the most competitive
100G solution. 24 Tb/s transmission test
ZTE announced the world’s first
Leading the Industry with Beyond- 24Tb/s DWDM prototype at the Opto-
100G
As well as developing 100G products,
ZTE has also started researching beyond-
100G optical transmission technology.
Significant progress has been made in this
research. In 2011, ZTE performed two
verification tests on its industry-leading
100G DWDM system.
11.2 Tb/s single-channel transmission test
ZTE achieved a single-channel fiber- Figure 2. Optical spectrum of 112 subcarriers.
optic transmission rate of 11.2Tb/s in
a first-time experiment at the Optical
Fiber Communication Conference in Electronics and Communications
March 2011. Conference in July 2011.
Optical signals were successfully The transmission rate of 24Tb/s
(1Tb/s net after eliminating FEC), and a
transmitted over a stretch of 640km standard (24×1.3Tb/s) sets a new record in optical
24-channel fiber provides a transmission
single-mode fiber. ZTE’s patented carrier networking. The 24Tb/s DWDM system
rate of 24Tb/s. The transmission distance
generation technology generates 112 has 24 wavelength channels (12 C-band
is 2400km standard single mode fiber
orthogonal subcarriers with 25GHz channel and 12 L-band) with 350GHz channel
only by using the standard erbium doped
spacing and 22.4nm spectral width (Fig. 2 spacing (Fig. 3).
fiber amplifiers.
Based on optical OFDM technology,
a laser source generates 13 orthogonal
25GHz RF
subcarriers for each channel, and each
Conclusion
Operators worldwide have already
Power Driver subcarrier bears 100Gb/s optical signals.
started planning to commercialize 100G
Phase Shifter The transmission per channel is 1.3Tb/s
transmission. ZTE can provide the most
EA EA
competitive 100G solutions. ZTE is
ECL PM1 PM2 WSS continually refining its 100G products
PM-OC PM-OC and creates value for operators. As 100G
products become more commercialized,
EDFA PM-TD the focus of current research will
turn towards beyond-100G. ZTE has
ECL: external cavity laser
PM-OC: polarization maintaining optical coupler developed beyond-100G technology
PM1: phase modulator 1 that is at world-class standard, and has
EA: electrical amplifier
established beyond-100G research
TD: time delayer
WSS: wavelength selective switch programs with numerous operators to
jointly lead the beyond-100G trend.
Figure 1. Orthogonal subcarrier generation. Figure 3. 24-channel wavelength spectrum.
12 ZTE TECHNOLOGIES December 2011C-RAN Bearer Network Solution
By Wang Huitao and Zhao Yong
C
-RAN is a centralized, In a traditional mobile access network, several gigabits per second using fiber.
cooperative, clean and cloud the access network layer transmits C-RAN is applied in areas where there is
computing architecture in radio signals at the A/lub interfaces. Signals are abundant fiber. China Mobile’s branch in
access networks. Baseband units (BBUs) transmitted at a typical bandwidth of tens Zhuhai has adopted C-RAN, and Korea
in C-RAN are centrally deployed, which of megabits per second using MSTP/PTN. Telecom has also adopted it in its CCC
allows for baseband sharing, saves In C-RAN mode, BBUs are centralized, network. In fiber-scarce regions, ZTE has
equipment room, and considerably and the access network layer also needs developed an array of solutions, including
reduces energy consumption and TCO. to transmit signals at an Ir interface (that enhanced fiber connection, colored fiber
Cooperative radio also significantly complies with the CPRI standard). Signals connection, and OTN bearer. All these
improves network performance. are transmitted at a typical bandwidth of solutions use a very few fibers to meet
C-RAN bearer requirements in different
Virtual Base Station Pool Virtual Base Station Pool Virtual Base scenarios.
…… X2+ X2+ Station Pool
General-Purpose PHY/MAC General-Purpose PHY/MAC General-Purpose
Processor Processor Processor
General-Purpose Transmission Requirements for
Processor
CPRI
Balanced Traffic Load C-RAN In a RAN, different wireless systems
High Speed Switching Bearer Network need different bandwidths. Table 1 lists
CPRI bandwidth requirements for site
types of three typical wireless systems.
RRU RRU
RRU
RRU As well as specifying the bandwidth
requirement, the CPRI standard also
RRU RRU
RRU RRU RRU specifies that
the transmission distance should be
Figure 1. C-RAN architecture. not less than 10km. (ZTE’s BBU can
December 2011 ZTE TECHNOLOGIES 13Solutions
Table 1. CPRI bandwidth requirements for different wireless systems.
Bandwidth for a Single Site
Wireless System Site Type Cascading Bandwidth for Each Carrier
with Three Sectors
GSM S666 Support 50Mbps 6Gbps
TD-SCDMA S444 Support 400Mbps 6Gbps
TD-LTE S111 Not Support 9.8Gbps 3×10Gbps
Note: The actual bandwidth of each GSM site is 1.25Gdps. When 18 RRUs are cascaded, bandwidth can reach up to 6Gbps.
compensate a transmission length of an independent C-RAN by means of transmission scheme for GSM C-RAN.
40km) enhanced fiber connection or colored fiber
jitter introduced into each RRU should connection. The other is to use outdoor Colored fiber connection
be less than ±0.002ppm OTNs as bearers. In colored fiber connection, WDM is
time synchronization for TD-SCDMA used to configure optical multiplexers/
and TD-LTE base stations should be Enhanced fiber connection demultiplexers (OMDs) in the BBU pool
precise to ±1.5us. When the 1588 Because bandwidth for the CPRI and optical add/drop (OAD) devices on the
protocol is used in C-RAN for time link is small in a GSM network, a large RRU nodes. Fig. 3 shows a configuration
synchronization, the recommended number of RRUs can be cascaded to save of four RRU nodes, each with an OAD1.
precision for transmission between fibers. Enhanced fiber connection allows Optimal modules on the BBUs and RRUs
BBU and RRU is ±100ns. for cascading of up to 18 RRUs through are colored (WDM) modules with certain
the CPRI interface (Fig. 2). A mature 6G wavelengths. CWDM is used to support a
In a solution that does not use a optical module can be used for each RRU. maximum of 18 wavelengths, and DWDM
transmission device, BBU-RRU can use Equipment at the radio side provides is used to support a maximum of 80
CPRI overhead to perform basic OAM. protection and OAM for enhanced fiber wavelengths.
In current network planning, C-RAN is connection using CPRI signals. Each wavelength connection between
used in the access network layer. The With enhanced fiber connection, six BBU and RRU is a physical point-to-point
BBU pool is located at the border of the GSM sites can be networked with only connection, so power budget is a key issue.
convergence layer and access layer, and 4 one pair of fibers. This is an optimal Power budget calculation is OAD
to 6 sites are connected to each ring.
C-RAN Bearer Network Solution
The core function of C-RAN is to
transmit data at the Ir interface. Since
IQ data at the Ir interface have large
bandwidth and high jitter requirement and
cannot be multiplexed or converged, it is
impossible for traditional SDH/MSTP/
PTN/PON/Switch bearer equipment to
carry the IQ data. WDM is therefore used
to solve the transmission issue in C-RAN.
Fiber connection is directly used for
fast C-RAN deployment in areas with
abundant fibers resources. There are two
schemes available for areas where fiber is
scarce. One is to use a few fibers to build Figure 2. Enhanced fiber connection with 18 cascaded RRUs.
14 ZTE TECHNOLOGIES December 2011backbone transmission network, and
the cost is high. When OTN is widely
Colored SFP
Colored SFP
Colored SFP
Colored SFP
Colored SFP
Colored SFP
Colored SFP
Colored SFP
used as a C-RAN bearer, its functions
can be implemented with an ASIC.
This significantly cuts equipment cost.
Moreover, no equipment room is needed
for C-RAN application. Where a compact
OTN is mounted on a corridor wall or
Colored SFP
Colored SFP
Colored SFP
Colored SFP
on an outdoor pole, small industrial
components reduce temperature and
Colored SFP Colored SFP allow for better temperature control.
Colored SFP
When OTNs are used in an access
Colored SFP
network, multiservice bearer requirements
Figure 3. Schematic diagram of colored fiber connection. can be met by building new OTN
transmission networks and expanding
existing ones.
insertion loss on a local add/drop path + connection is similar to that for fiber
OAD insertion loss on other nodes + OMD connection. Wireless equipment provides Conclusion
insertion loss + adapter loss + optical fiber protection and OAM through CPRI The primary issue in a C-RAN bearer
loss + engineering margin < optical module signals. OAD is a passive optical device network is the cost of fiber in large-scale
power budget. For example, the power that can be placed in an outdoor power deployments. For GSM C-RAN, ZTE
budget for a colored 8-wavelength CWDM cabinet or in an optical cross-connecting provides an enhanced fiber connection
fiber connection of six TD-SCDMA sites box. OMD and OA can be installed in the solution that uses 18 cascaded RRUs to
with a loop length of 20km is 1 + 5 × equipment room where a BBU pool is greatly save fiber resources. This solution
1+2.5 + (8 + 5 × 2) × 0.5 + 0.25 × 20 + 3 = located. Through colored fiber connection, has been commercialized. For TD-SCDMA
25.5dB. At present, the power budget for a both TD-SCDMA and TD-LTE C-RAN C-RAN, ZTE provides a colored CWDM
6G colored optical module is 25dB, which bearer schemes can be implemented with fiber connection solution that supports six
meets the basic requirement for colored only one pair of fibers. networked sites (18 cascaded RRUs) with
fiber connection in TD-SCDMA C-RAN. only one pair of fibers. Field tests for this
By increasing the power budget of colored OTN bearer solution are currently being carried out. The
optical modules, six TD-SCDMA sites OTN is a WDM-based integrated solution adopts mature DWDM, OA and
with loop length of 40km can be color-fiber bearer device. In the C-RAN bearer FEC technologies that can be used to fully
connected. network solution, CPRI can be a service meet bearer needs of future LTE.
For future LTE, each site will need type carried by OTN. Various mapping Enhanced fiber connection and colored
three 10G wavelengths, and colored schemes for CPRI over OTN have been fiber connection have advantages over
CWDM fiber connection will still support defined in the ITU-T G.709 standard. The traditional fiber connection. Both are low-
four sites with a loop length of 20km. stringent requirements on CPRI jitter and cost C-RAN bearer network solutions that
When DWDM and OA are used, six sites delay can be fully met by using a proper save fiber resources, protect the network,
with a loop length of 40km are supported. network design. and perform OAM. With enhanced fiber
For densely-deployed LTE sites where As well as C-RAN, OTN also connection and colored fiber connection,
few changes have been made to the supports SDH, MSTP, PTN, PON and widespread C-RAN deployment is
optical network topology, an OAD will be Ethernet transmission. Because OTN is feasible. Moreover, outdoor OTNs can
shared by more LTE sites. 24 LTE sites introduced into the transmission layer, it be used in access networks as bearers for
can be networked on a ring with a pair provides perfect protection, OAM, and multivendor integrated services including
of fibers, and these sites will have a loop fault diagnosis and can support ring, tree C-RAN, broadband access and VIP
length of 40km. (UniPON), and mesh topologies. dedicated lines.
OAM for colored CWDM fiber Traditionally, an OTN is used in a
December 2011 ZTE TECHNOLOGIES 15Success Stories
TeliaSonera
Green Broadband for a Green Country
By Chen Zongcong
I
n recent years, Northern Europe and has always been concerned about concern for TEO. GPON has been highly
has been at the cutting edge of environmental issues. In 2009, TEO was recognized by operators worldwide for its
information and communications recognized as the greenest enterprise by high bandwidth, low power consumption,
technology and has led the world in the Lithuanian government, and now small carbon footprint, and flexibility in
broadband construction. Lithuania has TEO aims to build a low-TCO, green the use of optical fibers and equipment.
a population of only 3.5 million and a broadband access network. As part of the task of building a
broadband subscriber base of 600,000. To offer better services, TEO has national information system, TEO plans
Broadband penetration in Lithuania is recently devised a new-generation to build a highly-efficient optical network
among the highest in the world. TEO network plan. FTTH broadband access that has 200Mbps bandwidth and can be
is the largest telephony and broadband is a key part of the plan that will deliver upgraded to 1Gbps in the future. High
Internet provider in Lithuania. The speeds of up to 1Gbps to users. Users will bandwidth and multiservice bearing are
company is 68% owned by TeliaSonera, be able to enjoy voice, data and IPTV. TEO’s basic requirements for its future
a leading provider of telecommunication TEO previously used DSL and AON in broadband network. TEO also aims to
services in Nordic and Baltic countries. its broadband network. DSL was deployed build an end-to-end eco-friendly network
at the early stage, and AON has been that consumes less power, emits less
The Green Broadband Plan widely used in recent years. Choosing carbon dioxide, cuts down CAPEX
TEO began offering integrated an appropriate broadband technology for and OPEX, and minimizes noise from
telecom, IT and TV services in 1992 future network construction is a major equipment. A GPON-based, low-TCO,
16 ZTE TECHNOLOGIES December 2011green FTTH solution is preferred by TEO.
On the Way to Green Broadband
TEO initiated a GPON FTTH project
in 2009, and 11 equipment vendors
were invited to bid for the project. ZTE
provided an end-to-end GPON solution
that could fully meet TEO’s requirements.
Its green broadband concept is in line
with TEO’s corporate culture. After many
rounds of selection and testing, TEO
finally chose ZTE as its partner to develop
one of the world’s fastest, greenest
networks.
Fastest
Using ZTE’s GPON solution, TEO
rolled out the fastest broadband network
in the world, delivering speeds of up Artur Zajankovskij (L), sales manager of ZTE CIS office and Edvardas Linkevicius (R), general
manager of TEO network development department receive the GTB innovation award
to 200Mbps to customers. The GPON
solution allows for smooth evolution,
which ensures higher bandwidth access of TEO’s need for green broadband in five “We are honored to accept this award
1Gbps in the future. aspects: for providing an environmentally friendly
innovative ASIC and PCB components, telecom platform. With ZTE’s technology,
Greenest highly integrated cards, and smart TEO will benefit from over 37 percent
ZTE’s green innovations significantly fan speed control to reduce power TCO savings in the first four years,
reduce power consumption. They satisfy consumption increased bandwidth and QoS levels,
lead-free design and no use of harmless and high energy efficiency. Our GPON
materials platform is helping TEO reduce its TCO
smooth evolution to 10G EPON, 10G and manage a more efficient network,”
GPON, and WDM PON to prolong the said Li Guotao, general manager of ZTE’s
lifecycle of equipment Baltic Office.
small footprint to save space and energy According to data released by the
end-to-end OAM solution involving NetIndex, Lithuania ranks 2nd globally
zero touch, automatic line and for both upstream and downstream data
equipment diagnosis, and remote speeds. Lithuania deploys fiber-optic
diagnosis and management to Internet technologies at the fastest rate
effectively cut labor costs. in Europe. At the end of 2010, 200Mbps
fiber-optic Internet access was used by
The Promising Green Broadband approximately 23 percent of Lithuanian
On June 8, 2011, TEO and ZTE won residents. TEO successfully upgraded
Global Telecom Business magazine’s the GPON network in June 2011, and
Innovation Award for Fixed Network its customers now enjoy speeds of up to
Infrastructure Innovation. The award 300Mbps. With the help of ZTE, TEO is
recognizes the fastest, greenest GPON well on its way to green broadband. TEO
network, and was given for the network will embrace a more promising future for
TEO building jointly deployed in Lithuania. FTTH networks.
December 2011 ZTE TECHNOLOGIES 17Success Stories
Beltelecom: Creating a National
Broadband Strategy in Belarus
By Zhang Lei
The Largest Fixed-line Operator in resources that provide almost all ways The advanced FTTH solution has
Belarus of accessing international digital significant advantages, and the scale of the
B
eltelecom is the largest state- information. Mobile operators in Belarus investment will be large. Major concerns
owned communications can connect international space stations to for Beltelecom are how to protect its
enterprise in Belarus and has offer international roaming. Beltelecom investment, reduce energy consumption,
a monopoly on fixed-line and data is the main international pipe supplier cut OPEX, and boost profitability.
transmission services throughout the in Belarus and plays a crucial role in its
country. Internet service market. Building a Future-Proof FTTH Network
As well as being the number one In September 2010, Beltelecom and
fixed-line operator and leading ISP in National IPTV Strategy ZTE began discussions on selecting an
Belarus (through its subsidiary, Belpak), Traditional DSL access has not been appropriate FTTH construction mode.
Beltelecom also has a stake in the top sufficient to meet the ever-increasing After rounds of technical evaluations and
three mobile operators in the country. bandwidth demand in Belarus, and comparing business models, Beltelecom
Beltelecom has built extensive Beltelecom has been developing and ZTE determined that a GPON-based
communications networks across Belarus, Belarus’s national IPTV strategy. In 2010, FTTH solution was the best fit.
and its backbone fiber-optic lines have Beltelecom initiated a national broadband
egresses to neighboring countries. network (NBN) that will meet user Future-proof optical access construction
Beltelecom provides international toll, requirements long into the future. mode
terrestrial network, TV, and broadcast Beltelecom chose to use GPON to An array of ONTs, including F601,
services. It operates a satellite ground meet its increased bandwidth needs, and F820, F620 and F660 will be used to satisfy
station known as the “information port” FTTH was chosen as the construction high bandwidth requirements of different
through an international satellite channel. mode. With a fast, integrated FTTH applications. The GPON-based NBN
Beltelecom owns public data network, Beltelecom can provide their will provide a variety of quality services,
transmission networks and Internet customers with quality services. including high-speed Internet, IPTV, and
18 ZTE TECHNOLOGIES December 2011dedicated lines. In addition, it will meet the EU standard and the required power in a traditional network gives rise to a
the ever-increasing service and bandwidth supply is significantly reduced. Statistics variety of issues, including radiation, heat
requirements of users well into the future. show that a broadband access network dissipation, and noise. FTTH changes the
using this technology saves 50% on way a network is operated and greatly
Smooth evolution to NG-PON system-side power consumption per reduces the OPEX on maintaining
Existing GPON is inevitably day. This greatly reduces Beltelecom’s outdoor equipment.
incapable of handling growing broadband electricity costs. ZTE’s innovative cabinet designs
allow Beltelecom to offer users
diverse broadband services and boosts
Beltelecom’s image as responsible
corporate citizen that fulfils its
environmental obligations.
ZXA10 C300
P2MP Splitter FTTH
Consolidating Market Leadership
ONT
Through FTTH
1490nm 1310nm F820 (ONT) After cooperating with ZTE on GPON
and NG-PON for a long time, Beltelecom
ONT
proposed the FTTH construction mode for
F620 (ONT)
the first time and conducted evaluation and
testing. It calculated the TCO for different
ONT
NetNumen F660 (ONT) construction models. Beltelecom and ZTE
jointly introduced a new configuration
management model for GPON technology.
Figure 1. FTTH solution with diverse ONTs. The FTTH deployment will have a
bandwidth capacity of more than 100Mbps
requirements. How can this pressing issue Reduced power supply requirements and will establish Beltelecom as the leader
be addressed? The ONT uplink module in the FTTH network, allow for faster in the Belarusian broadband market.
has to be pluggable so that Beltelecom network construction and rollout and Beltelecom strives to offer high-quality
can upgrade the existing GPON to NG- quicker profit. telecommunication services to its customers.
PON simply by replacing the uplink The large number of outdoor cabinets
module. This upgrade will deliver
higher bandwidth, better QoS, and more
networking options and will protect
Beltelecom’s initial investments. Outdoor Outdoor
Large Cabinets Medium Cabinets
Low OPEX
In FTTH, a large number of ONTs are
deployed in user homes, and all user-side
devices are passive. This greatly reduces
OPEX. Terminals are managed by TR069
in a unified manner. This helps create
a true plug-and-play environment and Outdoor
significantly reduces OPEX. Indoor Cabinet Small Cabinets
The innovative, energy-saving
design of ZTE’s OLT reduces power
consumption of each PON port by 42% Figure 2. Diverse outdoor and indoor cabinet solutions.
so that power consumption conforms to
December 2011 ZTE TECHNOLOGIES 19Success Stories
Telkom Kenya Makes Changes
with Orange
By Feng Wanli, Hu Xin and Qiu Jiayuan
K
enya is the financial, many years until the duopoly was ended 200,000 subscribers. In September 2008,
communication, and by Essar Telecom and Telkom in 2007. Telkom Kenya launched GSM services
transportation hub of Eastern Along with the split-up of the market, under the Orange brand, attracting
and Central Africa. Its GDP growth average voice tariffs across the industry 30,000 subscribers in the first month. In
was 5% in 2010, and this is expected have plummeted by more than 80% since November 2010, CCK announced that
to rise to 5.7% in 2011. Kenya’s area Airtel entered and began slashing its Orange Telkom Kenya had been granted
is 580,000km 2, and its population is tariffs in 2010. a 3G license. In March 2011, Orange
nearly 39 million. Telkom Kenya awarded a HSPA+ 3G
Telkom Kenya, operating under the Rapid Development network rollout contract to ZTE.
Orange brand, is the only integrated I n 2 0 0 7 , Te l e k o m K e n y a - t h e In September 2011, Orange Telkom
telecommunications solutions provider government-owned fixed-line operator- Kenya announced the launch of its
in Kenya. It offers mobile telephony was granted a mobile license by the 21Mbps HSPA+ network at a press
services (using the GSM and CDMA Communications Commission of Kenya event held in Nairobi. The new network
platforms), fixed line services, and (CCK) to provide and operate mobile was officially launched by the president
broadband Internet. cellular services. of Kenya, H.E.Mwai Kibaki, at an
At the end of 2010, Kenya had 24.969 In March 2007, the Kenyan event attended by key corporate and
million mobile subscribers and mobile government announced a plan to privatize government officials.
phone penetration of 63.2%. The market Telkom Kenya to make the operator more Mickael Ghossein, CEO of Orange
was split between Safaricom (17.451 efficient and profitable. In November Telkom Kenya, said they intended to
million subscribers), Airtel (3.792 million 2007, France Telecom bought a 51% stake use the new network to make their
subscribers), Orange Teklom (2.134 in Telkom Kenya for USD 390 million. company the undisputed market leader
million subscribers), and EssarTelecom Telkom Kenya launched CDMA2000 in mobile internet services. Orange
(1.592 million subscribers). Safaricom 1X EV-DO service in July 2007, and Telekom will offer the most versatile
competed neck-and-neck with Airtel for at the end of 2007, the service had and robust network to enhance customer
20 ZTE TECHNOLOGIES December 2011ZTE products and technologies are on the same level
as those of European vendors. After running into some
difficulties at the beginning, the project got on the right
track. The rollout has run according to plan so far, and we
are very happy with its status.
—Alain Bridard , CTO of Orange Telkom Kenya
is to be the market leader in mobile
Internet. The 3G network rollout will
help Telkom Kenya double its number
of subscribers by the end of 2011 and
secure number two position in the
Kenyan mobile market by 2015.
The new network has enhanced the
competitiveness of Telekom Kenya and
has generated a new revenue stream
for the company. “This network is the
platform with which we will provide
fast and reliable Internet speeds of up to
21Mbps. Our high-definition voice and
other features are designed to meet the
Kenya’s president H.E.Mwai Kibaki at the launch ceremony dynamic needs of our customers now
and into the future”, said Orange Telkom
Kenya chairman Eddy Njoroge.
experience. “The mobile phone has Xu Chengrong, CEO of ZTE Kenya.
The 3G network puts Telkom Kenya
evolved from being a tool for basic voice ZTE used advanced dual PA for the
on par with some of the best operators
and text communication to being a tool of swap-over and new site deployment. The
in the world. Orange Telkom Kenya
convenience,” said Ghossein. dual PA technology allows for smooth
is becoming more effective, more
evolution to HSPA+ and LTE without any
productive and more customer-oriented.
RAN Renewal Project changes to hardware.
The RAN renewal project will see 682 Full use was also made of CAF/
Ericsson and ALU 2G sites replaced with feeder resources to reduce equipment
ZTE SDRs. 820 new sites will be built costs. MW cabinets were customized
over three years. for outdoor sites, end-to-end mobile
“To help Orange Telkom Kenya satisfy backhaul was integrated, and hotspot
the demand for reliable mobile application coverage was implemented.
services, we provided them with world-
class technologies and effective solutions Objective
with the lowest TCO in the industry,” said Orange Telkom Kenya’s objective
December 2011 ZTE TECHNOLOGIES 21Success Stories
Hi3G Simplifies Network O&M
with NetNumen U31
By Zhang Weihua
S
weden has one of the most OPEX, Hi3G adopted ZTE’s efficient unified platform to simplify software
developed telecom markets in the NetNumen U31 for unified network and hardware configuration and lower
EU and is home to the world’s first management. O&M cost
commercial LTE networks. Hi3G Sweden NetNumen U31 has the following NetNumen U31 is built on a unified
AB, an operator in Northern Europe, advantages: element management platform (UEP) that
is seeking to strengthen its competitive makes full use of system resources. To
edge and maintain the rapid growth of its
subscriber base. At the beginning of 2011,
Hi3G built the world’s first FDD/TDD NMS/OSS
LTE network that offers customers diverse
services and smooth data experience.
NetNumenU31
Hi3G Sweden AB is now looking for
ways to cut down the high additional
costs of managing UMTS, LTE FDD,
and LTE TDD equipment. There are costs
involved in server configuration, O&M RNC Microwave MME CG
labor, complicated IT network planning, RAN
transmission
EPC
capacity expansion, and network NR8000
SR10 xGW HSS
interoperability. eNodeB(FDD) eNodeB(TDD) NodeB PR10
To address the future trend of network
convergence and cut down CAPEX and Figure 1. NetNumen U31 solution.
22 ZTE TECHNOLOGIES December 2011manage tens of thousands of UMTS, LTE network interoperability. ZTE took
FDD, and LTE TDD cells, Hi3G chose the lead by standardizing northbound
to deploy only one set of NetNumen U31 interfaces. Standard SNMP, CORBA,
software and hardware rather than dozens and DB interfaces are provided to suit
of servers. Few O&M nodes are used, any wireless network. ZTE has also
and flat network architecture is supported. collaborated with mainstream NMS/
This saves equipment room and power BOSS vendors such as IBM, HP, and
consumption, simplifies network Aircom, to build OSS interoperability
planning, and lowers the cost of regular testing labs. This significantly reduces
network checks. workload, time, and costs for network
interoperation and allows operators to
distributed deployment to leverage deliver services in the shortest time.
old devices and protect operator
investment industry-leading plug-in design to
Rapid subscriber growth drives the support unified management of
need for network expansion. When microwave and wireless equipment
the performance threshold of network Microwave has been widely accepted
O&M is exceeded, NetNumen U31 as the transmission solution for wireless
uses distributed architecture to extend networks because of its low cost, fast
its management capability. Distributed deployment, and flexible networking.
deployment means that good use is made Managing microwave and wireless
of old devices and operator investment is equipment in a unified and centralized
protected. manner is a challenge for operators.
NetNumen U31 adopts industry-leading
security and reliability to ensure plug-in design that allows for unified
smooth operation management of microwave and wireless
Network security plays an equipment, end-to-end monitoring, fast
important role in network O&M. As fault location and QoS guarantee.
system, operators can find problems with
well as integrating traditional security
signal coverage, frequency allocation,
management functions, NetNumen U31 integrated value-added tools to
and adjacent cell interference. MR also
also provides Hi3G with total security simplify fault location and network
automatically converts suggestions for
solutions ranging from OS to database optimization
network adjustment into scripts that can
applications. These security solutions Traditional drive test and signaling
be executed by NetNumen U31. This
protect Hi3G from security threats. All tools are time-consuming, labor-
helps optimize network performance.
access and operation logs are kept in the intensive and expensive to use. Northern
Hi3G Sweden AB has put into service
system and are automatically uploaded European operators are seeking new
NetNumen U31―the world’s first
to a third-party audit server for further tools to replace them. NetNumen
unified network management system
checking. U31 uses call trace system (CTS) and
that can manage UMTS, LTE FDD, and
measurement report (MR) as a cost-
LTE TDD networks simultaneously.
standard northbound interfaces to effective replacement for these tools.
NetNumen U31 will be able to manage
lower interoperability cost CTS has cross-domain signaling trace
microwave networks by the end of 2011.
Interoperability is also an important and signal flow diagram so that operators
Through innovation and collaboration,
issue that should be considered when can rapidly figure out the location of
ZTE will continue to help Hi3G Sweden
constructing an operator OSS. Diverse, a faulty signaling node. MR collects
AB make its network O&M simple and
non-standard, unstable interfaces lead a great deal of measurement report
efficient.
to time-consuming preparation, heavy data from all cells in the network. By
workload, and frequent changes for analyzing them through a post-analysis
December 2011 ZTE TECHNOLOGIES 23You can also read
