Coexistence primitives in power line communication networks
AssigneeTexas Instruments Incorporated
InventorsKumaran Vijayasankar, Ramanuja Vedantham, Tarkesh Pande
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Abstract
Systems and methods for setting a carrier-sensing mechanism in a PLC node are disclosed. In a PLC standard, coexistence is achieved by having the nodes detect a common preamble and backing off by a Coexistence InterFrame Space (cEIFS) time period to help the node to avoid interfering with the other technologies. In one embodiment, a PHY primitive is sent from the PHY to the MAC know that there has been a preamble detection. A two-level indication may be used—one indication after receiving the preamble and other indication after decoding the entire frame. The MAC sets the carrier-sensing mechanism based on the preamble detection.
Claims20
A device comprising:
- a medium access control (MAC) layer;
- and
- a physical (PHY) layer, the PHY layer configured to:
- receive a data packet via a communication medium,
- in response to detecting a first preamble in the data packet and a second preamble in the data packet, set a preamble indication primitive to a first value,
- in response to detecting the first preamble and failing to detect the second preamble, set the preamble indication primitive to a second value different from the first value, and
- provide the preamble indication primitive to the MAC layer.
Dependencies are inferred from the claim text.