04-04-2012, 12:34 PM
Phone-controlled Delivery of NGN Services into Residential Environments
Phone_controlled_Delivery_of_NGN_Services.pdf (Size: 1.28 MB / Downloads: 42)
INTRODUCTION
ntertainment devices such as set-top boxes, game
consoles, music players, and cameras today routinely
come with built-in networking capabilities that enable them
to upload, download, and render media from other devices in
the home. The Digital Living Network Alliance (DLNA) is
since 2004 publishing interworking guidelines for home
media sharing services [1] based on the Universal Plug and
Play (UPnP) standards family [2]. DLNA is now widely
accepted in the consumer electronics industry and will soon
enable advanced interworking services for all sorts of
devices in (local) IP network islands.
SCENARIOS & REQUIREMENTS
A. Example scenarios
1) Remote music access
Carol is on a business trip, visiting a conference. On the
way to the hotel she accesses the media portal of her service
provider to listen to music with her mobile phone. After she
has checked in, she decides to listen to her music in her hotel
room and connects to her media portal again. Using her
mobile phone she discovers all available media devices in
the hotel room, with the stereo system and a TV set among
them. This time she wants to enjoy the better sound quality
of the hotel stereo system. Therefore, she selects the stereo
system as target device for the music from the media portal,
and her songs are immediately played on the stereo system
in her room. Figure 1 depicts this scenario.
ARCHITECTURE
The proposed architecture for the phone-based delivery
of NGN services into residential environments is based on
the following main principles: Connectivity and accessibility
information about residential devices and their services is
published to a presence server. A URL is transmitted to the
mobile phone, pointing to the presence instance where the
connectivity and accessibility information for the residential
devices can be retrieved. This URL is forwarded to
application servers or other peers that subsequently use it for
requesting detailed device and service descriptions. These
details are then utilized for establishing a service delivery
session into the residential network, using the phone for
service control.
PROTOTYPE IMPLEMENTATION
A simplified prototype based on the described
architecture has been developed in collaboration of Ericsson
Research, University of Agder and RWTH Aachen. This
prototype supports a scenario where the user is a guest at a
hotel providing Digital Media Players and retrieves media
from a Media Portal. The prototype focuses on the
implementation of the service delivery functionality and
built on HTTP signaling for remote service awareness
instead of SIP/IMS.
CONCLUSIONS & OUTLOOK
We have shown how NGN technologies, UPnP/DLNA
and new proximity solutions can be applied to separate
service control from delivery. Using standard technologies
available today, services can be delivered to standard
consumer devices in broadband-connected local network
islands, with the user’s phone staying in control of service
access and delivery. This allows operators to further adopt
the role of a service and trust broker for users.