Locating at Choke Points
In This Chapter
Knowing the types of choke points
Using choke points in the real world
Understanding the underlying technologies
Choke points are strategic structures, such as doors and other entry or exit points, that help monitor and control the flow of assets or people within a building. Security check-in lanes in airports are good examples of choke points; other examples include checkout lanes at supermarkets and exit gates in parking lots.
Choke points have also been used in military strategy to force the enemy into a narrower formation, greatly increasing military personnel’s capability to control who can pass through and when.
Because choke points play critical roles in economics and security, the RTLS for locating at choke points has always received special attention from researchers and vendors.
Making Choke Points
Like any other RTLS, tags, location sensors, and a location engine are the fundamental constituents of an RTLS used for locating at choke points. A simple example of a choke point is shown in Figure 8-1. The type of location sensors and tags that are used depend upon the application using choke point. For example, if the application needs to open doors based on the tag ID, passive tags with an interrogator as a location sensor can be used, and if the application needs to lock doors based on the tag ID, active tags and a receiver as a location sensor might be required. The different types of choke points are explained in the ...