Methods and apparatus for waveform design and signaling for energy harvesting
摘要
說明書
For example, as shown in the flowchart, an EH WTRU may receive a control message including a zero-energy (ZE) EH transmission configuration. In an example, the ZE EH transmission configuration may comprise at least an indication including/indicating any of: a waveform, a frame format, a modulation type/rate, and a reception schedule. The EH WTRU may receive a DL control message (e.g., an EH poll) having a contention-based transmission configuration (e.g., received over a ZE air interface). The EH WTRU may determine whether there is a need for transmitting feedback information based on the EH WTRU's current EH state (e.g., current battery state or power level).
If there is a need for transmitting feedback information, the EH WTRU may determine one or more parameters for transmitting a feedback within a contention-based transmission window based on the contention-based backscattering configuration. For example, the EH WTRU may use the contention-based transmission configuration to determine time/frequency contention resources within the contention-based transmission window. In an example, the EH WTRU may determine, based on a current EH state, whether to transmit the feedback within the contention-based transmission window, and on a determination that the feedback is to be transmitted within the contention-based transmission window, determining the one or more parameters for transmitting the feedback based on the contention-based backscattering configuration and the current EH state of the WTRU. The one or more parameters discussed above may indicate one or more time slots and subcarriers considered for a contention-based backscattering transmission. The contention-based backscattering configuration may comprise any of: a transmission time offset, a transmission window, the contention-based transmission window, a number of time slots and subcarriers, and a contention strategy.
