System of communications between a post and moving bodies
First Claim
1. A system of personalized communication between a post and moving bodies which come into the vicinity of the post, wherein said system uses an exchange protocol that begins by means of a signal transmission initializer on said post which provides for a transmission of an initializing signal from said post, which said initializing signal is common to the different moving bodies that arrive in the vicinity of the post and said exchange protocol continues by means of an identification signal transmission means on each of said moving bodies which provides for the transmission of an identification signal by each moving body which is sent to said post, said transmission of an identification signal by one first moving body occurring at the end of a duration related to a duration value of an intrinsic code associated with said first moving body, said duration beginning in said moving body from the receipt of the initializing signal, said identification signal comprising a data corresponding to said duration value.
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Abstract
Disclosed is a system of communication between a fixed post and moving bodies that may arrive simultaneously in the radius of action of this post. This system uses an exchange protocol that begins with an initializing signal (INIT) common to the different moving bodies that arrive and continues with the transmission of an identification signal by each moving body, this transmission being done at the end of a duration (T+Nt) related to the value (N) of a part of an intrinsic specific code associated with the moving body, this duration being measured from the initialization signal. Preferably, the moving body transmits the beginning of its specific code, for example the first character of this code, followed by a random word having stipulated characteristics such that the terminal can detect whether several moving bodies have transmitted the same first character simultaneously. The post then asks them to transmit a second character in order to distinguish them from one another. Personalized exchanges could then begin when all the moving bodies have been identified.
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Citations
8 Claims
- 1. A system of personalized communication between a post and moving bodies which come into the vicinity of the post, wherein said system uses an exchange protocol that begins by means of a signal transmission initializer on said post which provides for a transmission of an initializing signal from said post, which said initializing signal is common to the different moving bodies that arrive in the vicinity of the post and said exchange protocol continues by means of an identification signal transmission means on each of said moving bodies which provides for the transmission of an identification signal by each moving body which is sent to said post, said transmission of an identification signal by one first moving body occurring at the end of a duration related to a duration value of an intrinsic code associated with said first moving body, said duration beginning in said moving body from the receipt of the initializing signal, said identification signal comprising a data corresponding to said duration value.
Specification