Transmission of segmented frames in power line communication

摘要

Segmented frames of data may be transmitted from a transmitting device using conflict free slots (CFS) within a carrier sense multiple access with collision avoidance (CSMA/CA) protocol on a noisy media. At a receiver, a segmented frame of data is received. The data is represented by a plurality of tones. If requested by the transmitter, a tone map response command is prepared that specifies a set of optimized tone map parameters by analyzing the received frame of data. Any previously determined tone map response commands to the transmitting device are deleted. A sequence of frame segments may be received in conflict free slots, but only one tone map response is transmitted to the transmitting device after receiving the entire sequence of frame segments.

主权项

1. A method for transferring frames of data using carrier sense multiple access with collision avoidance (CSMA/CA) on a noisy media, the method comprising:
receiving a frame of data via the noisy media from a transmitting device, wherein the data is represented by a first plurality of tones; receiving a tone map request with the frame of data; preparing a first tone map response command that specifies a set of optimized tone map parameters by analyzing the received frame of data; and deleting all previously determined tone map response commands to the transmitting device; transmitting a sequence of segmented data frames via the power line to a receiver using a plurality of conflict free slots in the CSMA/CA protocol, wherein the data is represented by a second plurality of tones; receiving an acknowledgment from the receiver for each correctly received segmented data frame; retransmitting a segmented data frame when an acknowledgement is not received; and including a second tone map request with only a last one of the frame of data if a segmented data frame is retransmitted on an immediately subsequent conflict free slot in a first mode of operation.