Apparatus and method for collision avoidance
AssigneeHoneywell Information Systems Inc.
InventorHerbert K. Jacobsthal
Life of this patent
Estimating the term…
Abstract
A collision avoidance apparatus having a voltage source producing a predetermined voltage level. A switching network within the collision avoidance apparatus is capable of alternately applying the predetermined voltage level to the communication medium and of applying the voltage level of the communication medium to a logic network. The logic network indicates if the predetermined voltage level and the voltage level of the communication medium are approximately equal.
Claims21
A collision avoidance apparatus for an information communication system having a communication medium capable of receiving and transferring information provided thereto, comprising:
- a. a voltage source producing a predetermined voltage level at an output thereof;
- b. a switching network connected intermediate said output of said voltage source and said communication medium for selectively providing said predetermined voltage level to said communication medium and the voltage level of said communication medium at an output thereof;
- and
- c. a logic network operatively connected to said output of said switching network and to said output of said voltage source for indicating when the voltage level of said communication medium and said predetermined voltage level are substantially similar.
A collision avoidance apparatus for an information communication system having a communication medium capable of receiving and transferring information provided thereto, comprising:
- a. a switching network connected to a reference node to receive a predetermined voltage level therefrom and to said communication medium for selectively providing said predetermined voltage level to said communication medium and then the voltage level of said communication medium at a communication node;
- and
- b. a logic network operatively connected to said reference node and to said communication node for indicating when said predetermined voltage level and the voltage level of said communication medium are approximately equal.
A collision avoidance apparatus for an information communication system having a communication medium capable of receiving and transferring information, comprising:
- a. a first means providing a predetermined voltage level at an output thereof;
- b. a second means connected intermediate said output of said first means and said communication medium for selectively providing said predetermined voltage level to said communication medium and the voltage level of said communication medium at an output thereof;
- c. a third means connected to the output of said first means and the output of said second means for producing an indication signal when the voltage level of said communication medium is approximately equal to said predetermined voltage level.
A method of avoiding collisions of information transferred on a communication medium comprising the steps of:
- a. applying a predetermined voltage level to said communication medium;
- and
- b. after step a producing an indication signal if the voltage level of the communication medium is approximately equal to said predetermined voltage level.
Dependencies are inferred from the claim text.