User's Manual

AAS
Multi-beam
Master BTS
AAA ASN TR-69 EMS
Figure 7 - 802.16e system implementation
2.4.1 The RAN - Radio Access Network
The Radio Access Network is simply composed of one or more Base Stations with attached
Antennas (or antenna array) that connect wirelessly to subscriber devices (e.g., Customer
Premise Equipment (CPE), Mobile Stations (MS), etc.
Depending upon its type and characteristics, a subscriber device may be self-contained (e.g., a
handset) or may connect to a router or computer via its “subscriber interface”.
A base station connects to the core network by means of its backhaul interface, which is
fundamentally a wired interface but may itself be carried by means of a wireless link or
network. The backhaul interface may connect to the core network directly, or through an
Access Service Network Gateway (ASN-GW).
2.4.1.1 RAN – Base Station
A Base Station has hardware, software, and mechanical characteristics that support its
functional and performance requirements. Base Stations and Subscriber Stations interconnect
with each other and their respective networks via sets of network, MAC, and PHY protocols.