User Manual

ADCP-XX-XXX • November 2000 • Section 3: WMTS Functional Description
Page 3-12
 2000, ADC Telecommunications, Inc.
reserved for modems just connected to the network, At the conclusion of obtaining upstream
parameters, the modem has:
* A rough time reference
* The details of an upstream transmit channel
* The details of the initial maintenance transmit opportunities for newly connected wireless modems
on that upstream channel
These three points are all used for the "'Ranging" process.
6.3 Provisioning
The wireless modem provisioning and initialization follows the following sequences of events and is
managed by the EMS. The WMU:
* Scans for a downstream channel and establishes synchronization with the WMTS
* Obtains transmit parameters
* Performs ranging to acquire upstream frequency and to optimize transmit power.
* Establishes IP connectivity (DHCP) for request and grant
* Transfers operational parameters (downloads parameter files via TFTP)
* Obtains Time of Day
* WMU registration
* Establishes Baseline Privacy
The wireless modem's Plug & Play scheme, minimizes the installation time. The WMU, with a
predetermined MAC address, automatically scans a list of factory preset downstream frequencies
compatible with standard frequency plans and locks onto the first data downstream channel that is
detected. This allows initial automatic acquisition of a downstream frequency during installation, as
well as automatic acquisition in the case of a downstream channel frequency change performed by the
operator. Every subscriber for high-speed data service has two addresses: a MAC address, and an IP
address. To receive and send data in the network, every user must have a MAC (Media Access
Control) address. It corresponds to the physical piece of hardware, the Wireless Modem Unit (WMU).
When the user is connected to the Internet, a table in the database in the base station relates the MAC
address to the Internet (or IP) address. The system uses the Dynamic Host Control Protocol, where the
system assigns the IP address to the user, for the duration of the connection or session. This is
accomplished by using the pool of IP addresses, which have been supplied to the system for this
purpose. When the WMU is connected to the user's computer, part of the installation procedure is to
add a Software driver. The driver reads the MAC address and incorporates the MAC address in the