Sensing threshold determining method and sensor node device

摘要

Embodiments of the present invention provide a sensing threshold determining method and a sensor node device. The sensing threshold determining method includes: measuring, by a sensor node, a target frequency band and determining used frequencies in the target frequency band and received signal strength of the sensor node at the used frequencies, where the used frequencies in the target frequency band include frequencies being used or having been used by a primary user transmitter in the target frequency band; and determining, by the sensor node, a sensing threshold for unused frequencies in the target frequency band according to the received signal strength at the used frequencies, where the unused frequencies include frequencies that are not used by the primary user transmitter in the target frequency band. With the embodiments of the present invention, a sensor node can determine a proper sensing threshold for unused frequencies.

主权项

1. A sensing threshold determining method, comprising:
measuring, by a sensor node, a target frequency band; determining, by the sensor node, a used frequency in the target frequency band and received signal strength of the sensor node at the used frequency, wherein the used frequency in the target frequency band comprises a frequency being used or having been used by a primary user transmitter in the target frequency band; and determining, by the sensor node, a sensing threshold for an unused frequency in the target frequency band according to the received signal strength at the used frequency, wherein the unused frequency comprises a frequency not used by the primary user transmitter in the target frequency band wherein the determining by the sensor node the sensing threshold for the unused frequency in the target frequency band according to the received signal strength at the used frequency comprises:
calculating b the sensor node, a path loss difference of the primary user transmitter between the used frequency and the unused frequency, anddetermining, by the sensor node, the sensing threshold for the unused frequency in the target frequency band to be a sum of the received signal strength at the used frequency, the path loss difference of the primary user transmitter between the used frequency and the unused frequency, and a transmit power difference of the primary user transmitter between the used frequency and the unused frequency.