IMS – IP Multimedia Subsystem
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behavior with enriched services that enable users to discuss and communicate
in real time using any combination of voice, video, picture and messages.
2.1.2 Convenience and ease of use
Any new service has to be natural and intuitive to use if it is to be a mass-
market success. Today’s subscribers are used to using mobile and fixed
phones anywhere in the world to call anyone. Similarly, they will expect new
services to offer a seamless experience across multiple access technologies,
devices and locations, whether wireline or wireless; narrowband, wideband or
broadband; business or personal. The user experience should also be
consistent across different device types.
Interoperability between terminals and operators is key – end-users are not
concerned which operator their friends use, they simply want the service to
work.
Voicemail, e-mail, mobile phones and wireless LANs have already
revolutionized how accessible subscribers are. Now subscribers are looking for
ways to manage this reachability – or their ’presence’ – better, so that they can
control how, where, when and by whom they can be reached. For example,
research has shown that they would value simply being able to see in advance
who they can contact, and how.
2.1.3 Safe communication
Telephony services have always been reliable and largely immune from curses
of intrusion, viruses and spam attacks that have come to characterize the
Internet. IP-based multimedia communications services must be safe for
people to use – free from malware or malicious attacks – whether through their
mobile or fixed terminals. Users will also want reassurance that others cannot
gain unauthorized access to their personal services and information.
2.2 Enterprise needs
Enterprise is always chasing costs and pursuing ways of running their
business more efficiently to improve the bottom line. Enterprises want to have
control and will demand flexibility in the way they handle their communications
such as moving, adding, and changing user information.
Enterprises are made up of individuals who have the same needs as those
outline in Section 2.1. However, there are some requirements that are specific
to, or more apparent in, the enterprise world. Those needs are tailored to their
work group or work environment.