This section provides a brief overview of how the data
provided to Location Awareness Services for WebSphere® Premises Server is
used. Each item that is represented is described in greater detail
in the sections that follow.
Data is used in
Location Awareness Services for WebSphere Premises Server as
follows (see
Figure 1):
- A third-party event provider sends provider-specific data.
Location Awareness Services for WebSphere Premises Server regularly
receives data from the event providers, which usually are connected
to a number of event devices (receivers). The receivers regularly
receive signals from active tags that are usually attached to assets
or carried by people. The event providers consolidate the signals
that are received and create fixed-format messages that are generated
from the signals. Each of these messages contains details about a
single tag, including tag ID and current position.
- Location Awareness Services for WebSphere Premises Server recognizes
the event and transforms it to a provider independent format that
is used throughout the internal processing of Location Awareness Services for WebSphere Premises Server.
- The event is linked to a zone. Because zones can overlap, a location
event can affect multiple zones.
- Rules are checked and, if necessary, an alert event is issued.
- The event is sent to the subscribing programs and notification
programs. See Location Awareness Services for WebSphere Premises Server events for more information.
Figure 1. Data flow and usage