Power control in wireless communications
摘要
說明書
The wireless device may be served (e.g., send/transmit to or receive from) by a plurality of TRPs comprising a first TRP and a second TRP. The wireless device may receive, for example, from the first TRP, first DCI scheduling a first TB and receive, from the second TRP, second DCI scheduling a second TB. At least in some wireless communications, the wireless device may determine a first transmission power for the first TB and a second transmission power for the second TB based on the same default pathloss reference signal mapped to the power control parameter set with the power control parameter set index that is equal to zero, for example, if the first DCI and the second DCI do not comprise an SRI field. By having different default power control parameters for different TRPs, instead of using the same default for all TRPs, the wireless device may tailor its transmission power to minimize waste and interference (which may occur if it used more power than needed) and delay and latency (which may occur if it used less power than needed, resulting in needing a retransmission). The locations/directions of the first TRP and the second TRP may be different. The wireless channels between the wireless device and the first TRP may be different from the wireless channels between the wireless device and the second TRP. Determining the first transmission power of the first TB and the second transmission power for the second TB based on the same default pathloss reference signal may result in inaccurate and/or less efficient transmission power determinations (e.g., lower or higher than the required transmission power) for the first TB and the second TB. This may lead to increased interference to other cells and/or wireless devices.
