Wireless Node Data Transmission via Interference Cancellation

The patent applies Successive Interference Cancellation (SIC) to convert harmful interference into useful information. The receiving node first decodes the strong signal, then uses it as interference cancellation to extract the weak signal. This transforms the previously harmful interference into a beneficial process that enables detection of multiple transmissions on the same radio resource, directly resolving the contradiction between network capacity and interference.

The patent implements preliminary power adjustment and MCS selection before data transmission. The receiving node预先 determines the optimal decoding order and power levels based on predicted SNR conditions. This preliminary action ensures that when multiple nodes transmit on the same radio resource, the interference can be effectively managed through pre-planned power control and modulation schemes, maintaining both high network capacity and detection accuracy.

The patent implements local power adjustment where each transmitting node sets its power level based on its specific channel conditions and the detected SNR range. Instead of uniform high power transmission, nodes transmit at locally optimized power levels. The receiving node uses SIC to compensate for power differences, allowing reliable detection without requiring all nodes to transmit at high power, thus reducing overall energy consumption while maintaining detection accuracy.

The patent dynamically changes transmission parameters (power level and MCS) based on detected SNR conditions. When the SNR of a neighbor node's signal falls within a detectable range, the system adjusts power and modulation parameters to optimize detection. This parameter adaptation allows the system to maintain reliable detection across varying channel conditions without consistently using high power, thereby reducing energy consumption while preserving reliability.

The patent segments the interference cancellation process into distinct, manageable stages: (1) SNR measurement and range determination, (2) Power adjustment based on SNR thresholds, (3) MCS selection, and (4) SIC decoding. Each stage handles a specific aspect of interference management independently. This segmentation reduces processing complexity by breaking down the complex interference cancellation task into simpler, sequential operations that are easier to implement and manage.

The patent implements feedback mechanisms where the receiving node measures SNR, determines detectability, and feeds this information back to adjust transmission parameters. This feedback loop enables adaptive interference cancellation that responds to actual channel conditions rather than using fixed complex algorithms. The feedback-driven approach simplifies processing by only applying interference cancellation techniques when and where they are actually needed, reducing overall device complexity while maintaining high detection accuracy.