User's Guide

Wireless Matrix MBS2 User Guide Document MBUD-0086v1b
When the MBS2 is not in the coverage area of any AP, it will forward packets received from the
serial connection to the WIPG, and the WIPG will route packets to the application host. The
returned traffic from host side will reach the CSC in the reverse fashion. See Figure 4 for a
graphical description.
This ability is achieved using Mobile IP, as well as the MBS2’s 802.11b device in infrastructure
mode.
WRX Data
Hub
Satellite dish
Base Station
AWS GPRS Network
Customer
Corporate
Network
In-Yard
Host C
Subnet C
In-Yard District C
Subnet A
In-Yard
Host A
In-Yard District A
In-Yard
Host B
Subnet B
In-Yard District B
Frame
Relay
Edge Router B
WRX WAW
Network
Non-In-Yard
Communication Path
Application
Host
Immediate
Router
DM-Router
Edge Router A
Edge Router C
Core Router
Edge Router
Edge Router
(WRX)
In-Yard
Communication Path
Figure 4: Customer Corporate and WRX Networks
Wireless DHCP (WDHCP)
The Wireless Dynamic Host Configuration Protocol (WDHCP) provides the dynamic assignment
of IP addresses to the CSC. The IP addresses are assigned and maintained by the WAW
Network. WDHCP allows CSCs to associate with any MBS2 to gain access to the WAW
Network.
WDHCP relies on the Wireless Modem Discovery (WMD) protocol: a simple protocol used by
client CSCs to query for the availability of MBS2s within their communication range. Once the
MBS2 is selected, the CSC registers with a WDHCP server in the NOSS, which processes the
request and assigns the IP address to the CSC
March 04, 2004 Page 11