Signal used in the transmission of data in a communication system
AssigneeAscom Tech AG
InventorDavid John Tonks
Life of this patent
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Abstract
A signal used in the transmission of data in a communication system (for example in an ATM network), comprised of immediately successive cells. For the purpose of cell synchronization, filler cells (I) containing a predefined bit pattern are provided. This pattern is provided with an error protection code that differs from the error protection code used for the user data. Even if the user data should coincidentally contain the predefined bit pattern, the synchronization circuit will not be able to be simulated, since this false bit pattern is provided with a different error protection code. In order to test and ensure the synchronization state, a BIP value at the end of the cell is checked at the receiver end.
Claims11
A method of data transmission, wherein transmission of a synchronization cell comprises the steps of:
- transmitting a synchronization bit pattern including a first error protection code;
- and
- transmitting a data set including a second error protection code,
- the first error protection code being different than the second error protection code.
Dependencies are inferred from the claim text.