Patent ID: 11962412
Assignee: HAILA TECHNOLOGIES INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A method for preserving a frame check sequence (FCS) of a data frame during backscatter communication, the method comprising:
receiving, by a backscattering tag, a transmitted signal including a transmitted data frame from a transmitting unit;
receiving, by the backscattering tag from a sensor coupled to the backscattering tag, sensor data; and
backscattering, by the backscattering tag, the transmitted signal to form a backscattered signal including a backscattered data frame that includes encoded sensor data, the backscattered signal receivable at a receiving unit configured to decode the encoded sensor data,
wherein the transmitted data frame includes a first data sequence and the FCS,
the first data sequence including a transmitted data sequence and a dummy sequence, the FCS being based on a first cyclic redundancy check (CRC) value determined using a given CRC algorithm for the first data sequence, and the FCS being usable by the receiving unit to detect communication errors in the transmitted data frame; and the backscattered data frame includes a second data sequence and the FCS, the second data sequence including the transmitted data sequence, an encoded tag data sequence and a CRC preservation sequence based on a backscattering tag data sequence including the encoded sensor data, a bit-length of the backscattering tag data sequence, and the given CRC algorithm,
the CRC preservation sequence preserving the FCS of the transmitted data frame in the backscattered data frame by yielding the first CRC value using the given CRC algorithm for the second data sequence, and
the FCS being usable by the receiving unit to detect communication errors in the backscattered data frame.