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laptops, which in turn accesses the iTunes online media/
music/video center, synchronized with the new iTV
server, as well as the Wi-Fi-enabled iTouch. The vision
consolidates around the iPhone, the new central device for
bringing the connected home together. Companies like
Nokia and Sony/Ericsson are working to leverage their
strenght in the mobile device market to develop similar
strategies.
Beyond Apple's vertical approach, organizations like
the Digital Network Living Alliance (www.dlna.org)
have developed a protocol for bringing devices into this
connected home network. In an HZ2.0 application, the
handset can become part of the network through a native
Wi-Fi connection and DLNA application running on the
phone, or via proxy through a DNLA-enabled femtocell. In
fact, Nokia and Samsung both recently announced their
first DLNA-supported, dual-mode Wi-Fi handsets.
For some mobile operators, the vision is on its way to
reality. In February 2008, Orange announced an initiative
called "Soft At Home." This joint venture with Sagem and
Thomson has the stated goal to "facilitate the deployment
and interoperability of digital equipment in the home."
BRINGING IT ALL HOME
Initial HZ2.0 ser-
vices offer compelling benefits for mobile operators to
improve coverage and offer low-cost mobile calling to their
subscribers. These benefits are being realized today by
innovative operators such as Orange and T-Mobile US,
among others. Yet the vision for HZ2.0 is to develop a long-
term connected home strategy that cements the mobile
operator as the service provider of choice for in-building
communications and puts the mobile phone squarely at
the center of the next generation in-home network.
For operators without a HZ2.0 capability, it is nearly
impossible to offer similar types of services. The macro
network alone does not support the fundamental
requirements of an HZ2.0 service: a radio-based `service
zone' to differentiate services from the macro network, the
use of broadband to offload data intensive services from
the macro network, and improved coverage/performance
delivered from an in-building radio (femtocell or Wi-Fi).
By combining location awareness with local data
offload, HZ2.0 offers a strategic advantage for mobile
operators. In short, HZ2.0 lets mobile operators own
the home.
FALL 2008
UMA TODAY
19
PoC
Pres.
Video
Circuit
Svcs Core
PS Core
Femtocell/
Wi-Fi AP
Local Apps
Internet Apps
On Deck Apps
UNC/RAN
Gateway
Local
LAN
Local
LAN
Internet
Destinations
Broadband/
Internet
lu-CS
lu-PS
PS Core
SGSN/
GGSN
Secure Tunnel
Circuit
Svcs Core
MSC
Internet
IMS
Broadband/
Internet
Internet
Destinations
Internet Offload
As consumers embrace mobile data access, portal sites
such as YouTube and MySpace are increasingly popular
destinations. But with the rise of flat-rate data pricing,
there is no significant revenue opportunity for mobile
operators offering access to these sites from within the
home zone. In addition, data-intensive traffic has the
ability to choke mobile network resources.
Therefore, it is desirable for the mobile operator to
offload internet-bound traffic within the home zone
directly to the IP network. HZ2.0 services based on
Wi-Fi or femtocells inherently support this local data
offload capability.
This is how dual-mode handsets without UMA
function. When in Wi-Fi, phones like the iPhone access
internet content directly over IP; while mobile services
like voice, SMS and other on-deck applications are
accessed over the cellar network. However, new UMA-
enabled handsets from Research in Motion (RIM) support
internet offload concurrently with UMA. When in Wi-Fi,
mobile services like voice and SMS are delivered through
the UMA tunnel, while internet applications like Google
or YouTube are routed directly over Wi-Fi.
Within a femtocell-based HZ2.0 deployment, femto
access points are expected to support a local data-offload
feature. Traffic from the handset is passed into the
femtocell, which then can route the request based on IP
address or APN to the mobile core network or directly to
the public internet.