stations (Node Bs) over private networks to Radio Network
Controllers (RNCs), femtocell access networks require
operators to integrate hundreds of thousands of low-
capacity base stations that can be moved/added/changed
by users at any time, all connected over the unsecured
and untrusted public internet. In order for the femtocell
market to reach its full potential, it is critical for the
industry to quickly address the unique requirements for
femtocell integration.
network connectivity. UMA is seen by many as rising rapidly
to the top of the list, and a number of mobile operators are
now seeking to leverage the existing 3GPP UMA standard to
address this unique challenge that femtocells present.
necTiviTY oPTionS
of device-to-core network connectivity solutions. These
fall into three general approaches: "Iu-b"-based solutions,
"SIP/IMS"-based solutions and "Iu-over-IP"-based solu-
tions (Figure 1).
network connectivity include:
planned services to handsets when connected
via the femtocell, whether those services are
currently circuit-based or packet-based.