Transmission of Segmented Frames in Power Line Communication

• US 20150172073A1
• Filed: 02/25/2015
• Published: 06/18/2015
• Est. Priority Date: 02/22/2012
• Status: Abandoned Application

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Vijayasankar, Kumaran, Vedantham, Ramanuja
• Application Number:
  US14/631,669
• Publication Number:
  US 20150172073A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 2203/5408 using protocols
• CPC Class Codes: H04B 2203/5454 Adapter and plugs
• CPC Class Codes: H04B 3/542 the information being in digital form
• CPC Class Codes: H04B 3/544 Setting up communications; Call and signalling arrangements
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/0067 Rate matching H04L1/0013 and H04L1/08 take precedence
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 12/413 with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 27/2646 using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated

Abstract

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.

Claims

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:

transmitting a sequence of segmented data frames from a transmitter a via the noisy media to a receiving device using a plurality of conflict free slots, wherein the data is represented by a plurality of tones;

receiving an acknowledgment from the receiving device for each correctly received data frame;

retransmitting a segmented data frame when an acknowledgement is not received; and

including a tone map request with only one of the segmented frames of data when a segmented data frame is retransmitted by the transmitter on an immediately subsequent conflict free slot in a first mode of operation.

2. The method of claim 1, wherein the tone map request is included with only a last one of the segmented data frames.

3. The method of claim 1, further comprising:

dynamically configuring the transmitter to a second mode of operation to retransmit one or more of the sequence of segmented data frames only after another CSMA/CA contest; and

including a tone map request with each of the plurality of segmented data frames while the transmitter is configured in the second mode.

4. The method of claim 1, further comprising:

encrypting a complete frame of data to form an encrypted frame of data; and

segmenting the encrypted frame of data to form the sequence of segmented data frames.

5. The method of claim 1, further comprising:

segmenting a frame of data to form a sequence of segmented data frames; and

encrypting each segmented data frame in the sequence of segmented data frames.

6. The method of claim 1, wherein the noisy media is a high voltage power line.