Specifications

1-10 800 MHz System Planner R4-11-4G
FIXED-END EQUIPMENT
Radio Network Controller 3000 (RNC3000)
All user data and the IP header are encrypted. Only the over-the-air RD-LAP
packet header is not encrypted. Data encryption is transparent to end user
applications. The existing user application is able to send an encrypted
message without needing modification except as noted in the Network
Capabilities Specification for MWCS II message size compatibility and
encrypted unconfirmed outbound and broadcast message size reduction.
1.3.4.3 Encryption Key Management
The WNG automatically assigns and manages encryption keys. Each user
device is assigned a unique key for individual messaging. All users share a
common key for group call and all-call broadcast messaging. The WNG and
MWCS II in the device use a two-party key exchange method to derive a root
key that is used for the duration of the session. Keys are held in the device’s
volatile memory and are destroyed only when MWCS II or the device is
turned off. Conversely, the keys are not volatile in the WNG. Normal
inbound and outbound messaging resumes after the WNG restarts without
renegotiating keys with those units that haven’t changed or otherwise had
their keys expire.
Encryption key length is 128-bits for U.S. customers. Due to export
regulations, encryption key length is limited to 40-bits for customers outside
of the U.S.
For more information on data and network security, see Private DataTAC 2.0
Network Capability Specifications.
1.4 Fixed-End Equipment
The Private DataTAC network’s fixed-end components provide the network
infrastructure that enables mobile computers to communicate with the
customer host network. These products establish and control the radio
subsystem that provides the coverage area for the network and are the
source of most network management services.
This section describes the following network component products:
• Radio Network Controller 3000 (RNC3000)
• Wireless Network Gateway (WNG)
• FullVision INM
• QUANTAR Data Base Station
1.4.1 Radio Network Controller 3000 (RNC3000)
The Private DataTAC network uses the RNC3000. This important component
provides the interface between the host computer network and the base sites
that comprise the radio subsystem. It also controls and facilitates
communication services with the network’s wireless computers and
supports their mobility. The RNC allows several Private DataTAC network
management services.