Method for transmitting signals from electronic housings mounted on the wheels of a vehicle to a central unit mounted on said vehicle
First Claim
1. A method of transmission from electronic housings (6-9), each one of which is mounted on one of the wheels (2-5) of a vehicle (1), to a central unit (11) mounted on said vehicle, of signals representative of operational parameters of each wheel (2-5) and furthermore comprising an identification code (ID) of the latter, said transmission method consisting in using, for the transmission of each signal, a spread spectrum technique, and being characterized in that it consistsin an preliminary phase, in allocating:
- on the one hand, to each electronic housing (6-9) and to the central unit (11), a first common generic orthogonal spread code (Cg) identical for all of said electronic housings (6-9) and the central unit (11),and, on the other hand, to each electronic housing (6-9), a second orthogonal spread code (Ci) specific to said electronic housing,in using an initializing procedure consisting in causing the transmission by each electronic housing (6-9) of a spread signal (e) on the basis of the first common generic spread code (Cg), incorporating the second specific orthogonal spread code (Ci) and the identification code (ID) of said electronic housing,then in using a transmission procedure consisting in causing the transmission by each electronic housing (6-9) of a spread signal (e) on the basis of the second specific spread code (Ci) of said electronic housing.
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Accused Products
Abstract
A method of transmitting signals from electronic housings, each mounted on one wheel of a vehicle, to a central unit (11) on the vehicle, uses spread spectrum. There is allocated, on the one hand, to each electronic housing (6-9) and to the central unit (11), a first common generic orthogonal spread code (Cg) identical for the electronic housings and the central unit and, on the other hand, to each electronic housing, a second orthogonal spread code (Ci) specific to the electronic housing. An initializing procedure causes the transmission by each electronic housing of a spread signal (e) based on the common generic spread code (Cg), incorporating the second specific orthogonal spread code (Ci) and the identification code (ID) of the electronic housing. Subsequent transmissions include transmission by each electronic housing of a spread signal (e) on the basis of the second specific spread code (Ci) of the electronic housing.
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Citations
8 Claims
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1. A method of transmission from electronic housings (6-9), each one of which is mounted on one of the wheels (2-5) of a vehicle (1), to a central unit (11) mounted on said vehicle, of signals representative of operational parameters of each wheel (2-5) and furthermore comprising an identification code (ID) of the latter, said transmission method consisting in using, for the transmission of each signal, a spread spectrum technique, and being characterized in that it consists
in an preliminary phase, in allocating: -
on the one hand, to each electronic housing (6-9) and to the central unit (11), a first common generic orthogonal spread code (Cg) identical for all of said electronic housings (6-9) and the central unit (11), and, on the other hand, to each electronic housing (6-9), a second orthogonal spread code (Ci) specific to said electronic housing, in using an initializing procedure consisting in causing the transmission by each electronic housing (6-9) of a spread signal (e) on the basis of the first common generic spread code (Cg), incorporating the second specific orthogonal spread code (Ci) and the identification code (ID) of said electronic housing, then in using a transmission procedure consisting in causing the transmission by each electronic housing (6-9) of a spread signal (e) on the basis of the second specific spread code (Ci) of said electronic housing. - View Dependent Claims (2, 3, 4)
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5. A method of transmission of signals from one or more electronic housings mounted in different locations of a vehicle to a central unit mounted on said vehicle, each of said signals comprising a particular identification code (ID), comprising the steps of:
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allocating, to each of the one or more electronic housing and to the central unit, a first common generic orthogonal spread code (Cg) identical for all of the one or more electronic housings and the central unit; allocating, to each electronic housing, a second orthogonal spread code (Ci) specific to said electronic housing; following said allocating steps, causing each electronic housing to transmit a spread signal, the spread signal of each electronic housing being based on the first common generic spread code (Cg) and incorporating both the second orthogonal spread code (Ci) specific to said electronic housing and the identification code (ID) of said electronic housing; and following said causing step, causing the transmission by each electronic housing of a specific spread signal, each of said specific spread signals being based on the second spread code (Ci) specific to said electronic housing. - View Dependent Claims (6, 7, 8)
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Specification