Protocol and mechanism for mutter mode communication for station

Details Protocol and mechanism for mutter mode communication for station Protocol and mechanism for mutter mode communication for station

1995-06-07

1997-03-04

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Position indicating

342463, 455 531, G01S 302

Patent

active

056084129

ABSTRACT:
A local area network (LAN) of tracked mobile assets which are temporarily located in an area having a high density of mobile assets, such as a railway yard, employs a stationary master tracking unit that is responsible for communicating with mobile tracking units affixed to the mobile assets and transmitting information to a central station. The stationary master tracking unit may be mounted at an elevation, as on a pole, and single or multiple stationary master tracking units may exist in the same vicinity. Each stationary master tracking unit has a constant supply of power and communicates with the central station by way of either satellites or dedicated land line connection. A protocol is provided for communicating between the Stationary master tracking unit and the mobile tracking units. The protocol provides a mechanism for acquiring new mobile tracking units entering the railway yard and a mechanism for releasing mobile tracking units leaving the railway yard.

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