Data protocol
First Claim
1. A method of transmitting data according to a data transmission protocol as a plurality of data frames, each data frame including a frame header and an error checking field comprising at least two sub-fields, the method comprising for each data frame:
- forming data for a first sub-field of the error checking field by a first error checking method performed on particular data of the frame;
forming data for a second sub-field of the error checking field by a second error checking method performed on the particular data of the frame; and
transmitting the data frame;
wherein the first and second error checking methods are such that the data of the first sub-field has different error checking properties from those of the data of the second sub-field, and the frame header is excluded from the data of the frame on which the first and second error checking methods are performed.
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Accused Products
Abstract
A method of transmitting data according to a data transmission protocol wherein the data is transmitted as a plurality of data frames and each data frame includes an error checking field comprising at least two sub-fields, the data of the first sub-field being formed by a first error checking method performed on data of the frame and the data of the second sub-field being formed by a second error checking method performed on the said data of the frame, the first and second methods being such that the data of the first sub-field has different error checking properties from those of the data of the second sub-field.
6 Citations
17 Claims
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1. A method of transmitting data according to a data transmission protocol as a plurality of data frames, each data frame including a frame header and an error checking field comprising at least two sub-fields, the method comprising for each data frame:
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forming data for a first sub-field of the error checking field by a first error checking method performed on particular data of the frame; forming data for a second sub-field of the error checking field by a second error checking method performed on the particular data of the frame; and transmitting the data frame; wherein the first and second error checking methods are such that the data of the first sub-field has different error checking properties from those of the data of the second sub-field, and the frame header is excluded from the data of the frame on which the first and second error checking methods are performed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A data transceiver, for use in transmitting data according to a data transmission protocol as a plurality of data frames, each data frame in the plurality including a frame header and an error checking field comprising at least two sub-fields, comprising:
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means for forming data for a first sub-field of the error checking field in each given frame in the plurality, by a first error checking method performed on particular data of the given frame; means for forming data for a second sub-field of the error checking field in each particular frame in the plurality, by a second error checking method performed on the particular data of the particular frame; and transmitting the data frames in the plurality, wherein the first and second error checking methods are such that the data of the first sub-field of each subject frame in the plurality has different error checking properties from those of the data of the second sub-field of the subject frame, and the frame header of the subject frame is excluded from the data of the frame on which the first and second error checking methods are performed.
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Specification