oduced for event-triggered CBR reporting. In case PSSCH and PSCCH resources are placed non-adjacently, only PSSCH resource pool measure- ment is used for event-triggered CBR reporting. In case PSSCH and PSCCH resources are placed adjacently, CBR measurements of both PSSCH and PSCCH resources are used for event-triggered CBR reporting. Event-triggered CBR reporting is triggered by overloaded threshold and/or less-loaded threshold. The network can configure which of the transmission pools the UE needs to report [6,8]. A UE (regardless of its RRC state) performs transmission parameter adaptation based on the CBR. If PSSCH and PSCCH resources are placed non-adjacently, only PSSCH pool measurement is used for transmission parameter adaptation. However, if PSSCH and PSCCH resources are placed adjacently, CBR measurements of both PSSCH and PSCCH resources are used for transmission parameter adaptation. When CBR measurements are not available, the default transmission parameters are utilized. The exemplary adapted transmis- sion parameters include maximum transmission power, range of the number of retransmis- sions per TB, range of PSSCH RB number, range of MCS, and the maximum limit on channel occupancy ratio. The transmission parameter adaption applies to all transmission resource pools including exceptional resource pools [5,6]. Vehicle-to-Everything (V2X) Communications 837 In V2X sidelink communication, sidelink transmission and/or reception resources including exceptional resource pool are provided via dedicated signaling, SIB21 message, and/or pre- configuration for different frequencies in both scheduled resource allocation and UE autono- mous resource selection scenarios. The serving cell may signal only the frequency on which the UE should acquire the resource configuration for V2X sidelink communication. If multi- ple frequencies and associated resource information are provided, then it is up to UE to select a frequency among the permissible frequencies. The UE does not use preconfigured transmis- sion resourc