Specifications

2-10 800 MHz System Planner R4-11-4G
SYSTEM ANALYSIS
Availability Expectations
2.4.1.3 System Capacity
• Capacity covers issues that concern the maximum number of messages
per hour that the system can handle.
• Capacity issues need to be addressed up front and determine part of the
system design.
• What are the system capacity and response time expectations?
• How many mobile computer equipped resources will be deployed?
• What is the customer’s LAN/WAN load profile?
• How many messages per hour should each mobile computer handle
during peak periods and normal periods?
• What is the expected message profile per mobile computer in message
lengths and frequency of each?
• What is the current loading and capacity on the existing system before
Private DataTAC is added?
2.4.1.4 Response Time
Response time needs to be addressed up front and determines part of the
system design.
Response time covers issues relative to the time it takes for a system to
process a message. These issues are the center of the customer expectations.
The following issues must be addressed:
• What is the response time expectation?
• What is the existing system’s load and capacity without Private
DataTAC?
• What is the current response time of desktop computers connected to the
land-based network doing similar activities required of the mobile
computers?
With answers to these and several follow-up questions, a system designer
can create a network design that addresses many response time issues.
2.4.2 Availability Expectations
The customer’s business operations dictate the availability expectations.
Five-day/eight-hour operational demands, though different from seven-
day/twenty four-hour operational demands, are just as critical. In both
cases, availability during operating hours is a priority. Much of the
expectations center on how closely coupled the wireless data network is to
the customer’s revenue stream.