This function refers to the function of one RAN/BSS
connecting to multiple CN nodes within the same area.
pool-areas are a set of
one or more RAN/BSS node service areas served by multiple CN nodes (MSC or
SGSN) at the same time.
The Iu-FLEX/Gb-FLEX
function reduces the efforts of
inter-CN-node update/ switch/relocating and HLR update.
This function also
enhances the availability of the system , If one CN node in the pool-area is
faulty, other nodes can provide services.
