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US 7,564,875 B2Granted
Techniques to map and de-map signals
AssigneeIntel Corporation
InventorsNiklas Linkewitsch, Michael Kauschke
Life of this patent
Estimating the term…
Abstract
Briefly, a system that maps SONET/SDH data to an OTN frame using justification commands. Briefly, a system that de-maps an OTN frame into SONET/SDH data using justification commands.
Claims22
An apparatus to provide data based in part on a justification command, the apparatus comprising:
- processor logic to selectively provide a justification command and data from an input signal;
- a clock source to provide a first clock signal, wherein the clock source selectively modifies a phase of the first clock signal in response to the justification command;
- and
- an elastic store device to selectively transfer the data based in part on the first clock signal, wherein the clock source comprises first, second, and third clock sources to respectively provide the first, a second, and a third clock signals;
- a transform device to modify the phase of the clock signal in response to the justification command, to update a phase account to account for a phase impact of the justification command, and to update the phase account according to an amount of clock signal phase shift adjustment;
- and a phase comparator to modify the phase of the second clock signal based on a phase comparison of the first and third clock signals, wherein the processor logic is to selectively provide the justification command in response to a relative value of the phase comparison and a threshold value, wherein the clock source is to selectively maintain a ratio of the first clock signal to the third clock signal as approximately one in response to the justification command.
3 more elements
The apparatus of claim of 1, wherein the clock source is to selectively add a cycle to the first clock signal in response to a negative justification command and a phase account value to allow a phase adaptation.
A method to provide data based in part on a justification command comprising:
- selectively extracting a justification command and data from an input signal;
- selectively modifying a phase of a first clock signal in response to the justification command, wherein the justification command is provided based on a phase comparison between second and third clock signals and in response to a relative value of the phase comparison and a threshold value;
- selectively transferring the data based in part on the first clock signal;
- selectively modifying the phase of the second clock signal in response to the justification command;
- selectively combing the justification command with the data based on the first clock signal;
- updating a phase account to account for a phase impact of the justification command;
- and
- selectively maintaining a ratio of the first clock signal to the third clock signal as approximately one in response to the justification command.
5 more elements
A system to provide a justification command comprising:
- an interface;
- an elastic store device communicatively coupled with the interface and to selectively transfer data in response to a first clock signal;
- a clock source to provide the first clock signal;
- a justification source to selectively provide a justification command based on a phase comparison between second and third clock signals, wherein the justification source is to selectively provide the justification command in response to a relative value of the phase comparison and a threshold value;
- a transform device to selectively modify the phase of the second clock signal in response to the justification command;
- and
- a wrapper device to selectively combine the justification command with the data based on the first clock signal and to provide the combination;
- and
- a data processor communicatively coupled with the interface and the wrapper device, wherein the interface comprises an XAUI interface, wherein the clock source is to selectively maintain a ratio of the first clock signal to the third clock signal as approximately one in response to the justification command.
6 more elements
Dependencies are inferred from the claim text.