network connectively. 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 "RAN Gateway"-based so-
lutions (Figure 1).
network connectivity include:
via the femtocell, whether those services are
currently circuit-based or packet-based.
deploy femtocells with relatively low up-front
costs, as well as cause a low level of disruption to
the existing operations of an operator's core and
macro networks.
cost-effectively scale to support the deployment
of hundreds of thousands (if not millions) of
femtocells.
for the interface between femtocells and the core
network in order to support a robust femtocell
market.