Emergency data transmission over unlicensed radio frequency spectrum band
摘要
說明書
In some examples, frequency-division multiplexing (FDM) may be used between operators for the transmission of emergency data. In these examples, multiple operators may be allowed to transmit data during the same LBT frame, and in some instances, one of the operators may be allowed to transmit non-emergency data during the LBT frame. The operator that is allowed to transmit non-emergency data may be an operator that successfully performs a CCA at a default CCA opportunity for the LBT frame. The operator that successfully performs the CCA at the default CCA opportunity for the LBT frame may be required to hold a channel of the unlicensed radio frequency spectrum band for the entirety of the LBT frame, to ensure that all of the operators transmitting emergency data during the LBT frame have an opportunity to transmit emergency data. The operator that successfully performs the CCA at a default CCA opportunity for the LBT frame may or may not transmit emergency data during the LBT frame.
When using FDM techniques to transmit emergency data, each operator may be assigned a predefined frequency resource (e.g., a predefined subset of subcarriers) for the transmission of emergency data. In some examples, each operator having emergency data to transmit during an LBT frame may perform a CCA during an adjusted CCA opportunity for the LBT frame (e.g., during an earliest CCA opportunity among all operators contending for the LBT frame), and each operator having non-emergency data to transmit during the LBT frame may perform a CCA during a default CCA opportunity.
