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Global Marketing,
Inc - Market Analysis White Paper
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Wireless Back Haul: The New Infrastructure Challenge
(Shailendra
Kumar, May 2008)
Wireless backhaul of 2G, 3G, and 4G traffic during the next 3-5 years
will present the same problem to the network and service providers
as Internet did in the late 90s – the traffic is rising rapidly, but
the revenues will not. End users want video and data applications
such as mobile TV and mobile broadband Internet on their smart
phones, both bandwidth intensive applications, but are not willing
to pay more for it. In fact the prices are falling for bundled
triple-play offerings. The equipment providers must provide a
solution to handle this sudden rise in bandwidth requirements
without incurring the higher costs. Already, wireless operators
spend over $3 billion to lease T1/E1 lines from Carriers worldwide
to backhaul their traffic.
The situation is further complicated by the need to continue to support
legacy applications. That is, the service providers must support new
data intensive mobile applications (e.g. HSDPA) as well as
accommodate the equipment already deployed for mobile voice
services. This is a delicate balancing act. The challenge mobile
operators face is to grow data service revenue without having an
associated cost per bit that makes the economics of the solution
unacceptable.
The primary solution Telecom industry has homed in on is Carrier
Ethernet. Migrating from existing backhaul infrastructure to Carrier
Ethernet can significantly reduce cost and risk of the project since
Carrier Ethernet can cost effectively meet the bandwidth capacity
requirement over many types of access infrastructure including
fiber, copper, and wireless media. In addition, Carrier Ethernet can
carry native IP traffic, thus eliminating the need for conversion,
and reducing overall costs. The backhaul network traffic can be
carried on GE, 10GE, as well as on SONET/SDH with Ethernet over
SONET/SDH protocols.
Splitting Traffic at Cell Site
One possible and compelling solution is the hybrid approach, in which the
data traffic associated with the mobile devices is separated from
the mobile voice services directly at the cell site. The voice
traffic can be carried reliably and cost effectively over existing
T1/E1 infrastructure while HSDPA traffic can be backhauled using
lower cost broadband technologies such as xDSL, cable modem, and
carrier Ethernet.
Service Provider Requirements
With this new challenge, the service providers need a next generation of
equipment that will enable to them to accomplish the following
objectives.
·
Provide full end-to-end managed service that offers HSDPA
offload capability to the mobile operator.
·
Offer a complete technical solution that delivers to the Mobile
Network Operator (MNO) the interfaces needed to directly
interface to the radio subsystems at both cell site and core
aggregation locations.
·
Offer guaranteed SLAs in-line with broadband data
availability, monitoring, pro-active fault isolation and recovery.
·
Enable rapid and flexible bandwidth upgrades.
·
Accommodate a mixture of transport technologies to deliver
the service and perhaps even multiple operators, but these
underlying complexities should be transparent to the MNO.
Standards/Implementation Agreements
Leading global service providers and equipment vendors are working
together in the Metro Ethernet Forum (MEF) to develop a Mobile
Backhaul Implementation Agreement (IA) which will define the
following UNI interface and Generic Interworking Function (GIWF) and
provide the framework for emulated T1/E1 circuits over Ethernet for
wireless backhaul. This is expected to be complete this year (2008).
The next task will be to define the Network to Network Interface
(NNI), so the backhaul can be done over multiple networks owned and
operated by multiple network providers. 
(Source: Metro Ethernet Forum 2008)
On the 4G front, WiMAX standards have matured and new deployments have
begun, while Long Term Evolution (LTE) is being worked on in the
3GPP standards body. Clearly, as the networks and services continue
to evolve, new needs will arise and new standards or updates will be
needed to accommodate these new needs.
Some of the questions equipment vendors are dealing with include how they
would implement the new standards and future proof their equipment
as standards evolve, what goes in hardware and what can be done in
software to meet the evolving needs quickly. How would the
service provider split the traffic (voice and data) at the base
station or at RAN NC? Is high capacity (Ethernet) wireless
backhaul needed for 2G at all considering that the traffic is mainly
voice that can be handled by T1/E1s?
The Metro Ethernet Forum has developed three technical specifications MEF
3- Circuit Emulation over Ethernet Framework and Requirements, MEF 8
– Circuit Emulation over Ethernet and MEF 18- Abstract Test Suite
for Emulated Circuits. These important technical specifications are
the foundation for providing standard Circuit Emulation services to
support the legacy T1/E1 interfaces. The MEF Carrier Ethernet for
Mobile Backhaul technical project is developing an Implementation
Agreement specifically for Mobile Backhaul drawing from these three
technical specifications.

(Source: Metro Ethernet Forum 2008)
Early aspects of this technical work include the definition of use cases
for legacy transmission support, to accommodate the legacy T1/E1
based equipment and a second set of use cases for using a native
Ethernet User Network Interface (UNI) for connecting mobile
telephony switching equipment using Carrier Ethernet.
Specifically the MEF Mobile Backhaul Interoperability Agreement will
specify a set of service parameters to be implemented in a standard
manner in order to comply with the MEF IA. Parameters to be
specified include: Class of Service (CoS), Synchronization, Ethernet
Operations, Administration and Maintenance functionality, protection
requirements and fault tolerances, specific UNI type definitions,
capabilities and settings, and finally performance goals. The
MEF’s Carrier Ethernet for Mobile Backhaul Interoperability
Agreement approved draft is currently (2008) under “Straw Ballot”
and is well on the way to be approved by the membership.
Protocols
A myriad of protocols need to be supported
in the wireless backhaul network to accommodate the various
traffic types. The solutions are needed to allow transport of
TDM, HDLC, and ATM based services over packet-based MPLS, IP and
Ethernet networks. Regardless of underlying traffic being xDSL,
bonded SHDSL/EFM, native Ethernet on fiber or point-to-point
microwave, the equipment must make most efficient use of the
bandwidth to ensure viable business models. For UMTS, 3GPP
approved use of ATM over T1/E1 for UMTS RAN for GSM
installation. HSDPA traffic is has already started while high
speed uplink traffic via HSUPA is coming soon. The data rates
could reach 100 Mb/s on mobile devices in the near future. The
UMTS Base Station (Node B) and Radio Network Controllers (RNC)
will have to migrate from ATM based infrastructure to an all-IP
based model to carry all traffic types including GSM, UMTS, and
CDMA as well as support synchronization and clock recovery over
packet networks.
Copyright 2008, Global Marketing, Inc., 20880 Stevens Creek Blvd, #259,
Cupertino, CA 95014.
Global Marketing, Inc - Market
Analysis White Paper
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Broadband Market in India
(by S. Kumar, December 2007)
India has a huge pent-up demand for
broadband. The Indian IT industry is continuing to grow at an
astounding rate and fiber is being deployed on a very large scale in
India to build the infrastructure to support broadband and data
communications. Still, consumers have been waiting for 4-6 months to
get broadband service connected. MTNL has a waiting list of more
than 20,000 in Mumbai and New Delhi. The bottleneck in this
under-served market seems to be the availability of equipment, which
spells opportunity for the consumer electronics and carrier
equipment providers worldwide to enter in the India market.
Broadband services were launched in
India in 2005.
Telecom Regulatory Authority of India (TRAI) reported 2.43
million broadband connections in India at the end of April 2007.
BSNL and MTNL, the largest providers of last mile networks in India,
are targeting to add 6 million new broadband subscribers during the
coming year1.
Bharti Airtel Ltd. the country's largest mobile operator has
also launched broadband services and has over 10,000 customers. The
goal for India is to have 20 million broadband users by 2010.
Clearly, expanding broadband
deployment is a major need for India’s sophisticated and rapidly
growing consumer market. Cell phones have grown exponentially in the
last 10 years – India has the third largest concentration of cell
phones in the world. Now many of these same users, especially in
metropolitan areas, want broadband access from their homes at
affordable prices.
While in the US, technologies such as
GPON, BPON and DOCSIS 3.0 are poised to be deployed in 20082,
broadband access via copper and wireless seem to hold the promise in
India. A few Indian and international equipment and service
integration players have entered the India market to leverage the
opportunity. However, the list is still short.
Sterlite Optical Technologies Ltd. will design, develop, and
implement a broadband and metro Ethernet network to provide coverage
in the cities of Mumbai and New Delhi, with capacity for 500,000
subscribers by 2009. Sterlite is also helping to build an MPLS core
for the network.
Australian vendor
Arasor Corp. , is also entering India's broadband market by
building modems through a partnership with Indian semiconductor firm
SemIndia Inc.
UTStarcom will provide DSL Access
Muxes to BSNL to enable 1.3 million ADSL2+ lines as the carrier is
planning to roll out IPTV services over its network.
One of the major benefactors of
broadband in India is VoIP services. Only until about 2 years ago,
it was illegal to terminate VoIP calls on PSTN network. Now that the
regulations have changed and broadband is being deployed, we expect
a boom for the VoIP market in the coming years.
Broadband wireless (WiMAX) may make
it easier for new entrants to compete against the incumbent
operators3. Companies like Beceem, SOMA and others are
promoting this scenario. Although WiMAX Forum has announced the
certification of products in the 3.5 GHz frequency band, it is
unclear on what spectrum WiMAX could be deployed in India. The issue
is that 3.3 GHz is owned by the country’s space program, and other
frequencies are used by the military. At the lower end of the
spectrum, 700 MHz is a possibility. In addition, of course price is
a major issue. The annual 3.3 and 3.5 GHz equipment opportunity is
forecasted to be US$256 million in 20124.
Spending power of India and China is
expected to reach $9 Trillion by 2015, roughly equal to that of
Western Europe today5. Even though India's broadband
penetration is very low today, major efforts are underway to roll
out the infrastructure. Urban Indian consumers will seek out the web
more aggressively as soon as they have the right set of devices with
a balance between price and quality. Companies like Lenovo and HP
are in a prime position to strike this balance for consumers
interested in PCs on a par with their Western counterparts. In
addition, limited-functionality devices, such as Nicholas
Negroponte's $100 computer, will be attractive to consumers in the
lower income rural areas.
References
1.
Nicole Willing, “Indian
Telcos Tackle Broadband Shortage”, Light Reading, May 2007.
2.
Raymond McConville, “2007
Top Ten: Technologies to Watch”, Light Reading, December 2007.
3.
Dan O'Shea,
“India awaits a broadband breakthrough”,
Telephoneonline, January 2006.
4.
Carl Townsend, “India Broadband
& WiMAX Market Analysis”, WiMax.com, May 2007.
5.
Forrester Research,
“India's broadband penetration extremely low”, Business Standard,
2006.
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To contact the author, please send email to:
skumar2525@gmail.com
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