Adaptation to millimeter-wave communication link using different frequency carriers

摘要

To realize quick adaptation to a communication link between a transmitter and a receiver by using two different frequency carriers. A receiver detects a preamble from a transmission bit string. When determining that a total sum of the number of modified bits exceeds a certain threshold in a range of a payload following the preamble (when detecting that a reception state of a communication link has been degraded), the receiver issues, to a transmitter, a request for changing a transmission parameter (four parameters may be used for enhancement/lowering) for the transmission bit string by using a communication link, which is a relatively-low-frequency carrier. On the other hand, the transmitter receives the request for change, and executes the request for changing the transmission parameter for the transmission bit string while maintaining transmission of a payload in the transmission bit string.

主权项

1. A receiver for issuing a request for changing a transmission parameter for a transmission bit string to a transmitter to adapt to a state of one communication link, the receiver comprising:
a high-frequency carrier receiver configured to receive a transmission bit string from the transmitter; a preamble detector configured to detect a preamble from the transmission bit string; an error correction decoder configured to obtain a total sum of a number of modified bits in a range of a payload following the detected preamble, the number of modified bits including a number of bits of error corrected in decoding; a reception state detector configured to determine whether or not the total sum of the number of modified bits exceeds a threshold; and a low-frequency carrier transmitter configured to issue, if it is determined that the total sum of the number of modified bits exceeds the threshold, a request for changing a transmission parameter for the transmission bit string to the transmitter, using a communication link provided in parallel with the one communication link and serving as a relatively-low-frequency carrier.