Method for data communication between a base station and a transponder
First Claim
1. A method comprising:
- a inserting a control field into an information packet comprising one or more data fields and a protection field, the protection field for determining whether a signal is accurately communicated to a transponder, the control field separating the information packet into a first portion preceding the control field and a second portion following the control field;
transmitting, to the transponder, the first portion of the information packet preceding the control field of the information packet;
determining a value of the control field;
transmitting, to the transponder, the second portion of the information packet following the control field when the control field has a first value, the first value indicating that the first portion of the information packet preceding the control field has been correctly received by the transponder; and
retransmitting, to the transponder, the first portion of the information packet preceding the control field when the control field has a second value, the second value indicating that the first portion of the information packet preceding the control field has not been correctly received by the transponder.
11 Assignments
0 Petitions
Accused Products
Abstract
A method for data communication between a base station and at least one transponder by a high-frequency electromagnetic carrier signal is disclosed, onto which information packets are modulated, whereby each information packet has a header section, a middle section, and an end section and whereby the middle section has a data field for the transmission of data and/or address information and a protection field placed thereafter for the correction of errors in the transmission of the data and/or address information, whereby after the data field the base station inserts at least one control field, by which the protection field following the inserted control field can be changed in such a way that the duration of an information packet is set variably. The invention relates further to a base station for carrying out this method, to a data communication system containing a base station and at least one transponder in communicative wireless contact with the base station.
21 Citations
23 Claims
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1. A method comprising:
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a inserting a control field into an information packet comprising one or more data fields and a protection field, the protection field for determining whether a signal is accurately communicated to a transponder, the control field separating the information packet into a first portion preceding the control field and a second portion following the control field; transmitting, to the transponder, the first portion of the information packet preceding the control field of the information packet; determining a value of the control field; transmitting, to the transponder, the second portion of the information packet following the control field when the control field has a first value, the first value indicating that the first portion of the information packet preceding the control field has been correctly received by the transponder; and retransmitting, to the transponder, the first portion of the information packet preceding the control field when the control field has a second value, the second value indicating that the first portion of the information packet preceding the control field has not been correctly received by the transponder. - View Dependent Claims (2, 3, 4)
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5. A method comprising:
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a inserting a control field into an information packet comprising one or more data fields and a protection field, the protection field for determining whether a signal is accurately communicated to a transponder, the control field separating the information packet into a first portion preceding the control field and a second portion following the control field; transmitting, to the transponder, the first portion of the information packet preceding the control field of the information packet; determining a value of the control field; transmitting the second portion of the information packet following the control field when the control field has a first value, the second portion of the information packet following the control field comprising at least a portion of the protection field; and retransmitting the first portion of the information packet preceding the control field when the control field has a second value. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system comprising:
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a control device operable to determine a value of the control field; and a transmitting device operable to; inserting a control field into an information packet comprising one or more data fields and a protection field, the protection field for determining whether a signal is accurately communicated to a transponder, the control field separating the information packet into a first portion preceding the control field and a second portion following the control field; transmit, to the transponder, the first portion of the information packet preceding the control field of the information packet, the information packet comprising a protection field and a data field; transmit, to the transponder, the second portion of the information packet following the control field when the control field has a first value, the second portion of the information packet following the control field comprising at least a portion of the protection field; and retransmit, to the transponder, the first portion of the information packet preceding the control field when the control field has a second value. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification