Case 2: SR is Triggered by Uplink Data Arrival
Option 1 (Monitoring all control channel(s) UE is configured with)—The UE just monitors all configured control channels.
Option 2 (Monitoring specific control channel(s) for each SR configuration with triggered SR)—In this option, a control channel will be associated with a SR configuration. Hence, after a UE transmits a SR based on a SR configuration, the UE will monitor the associated control channel. The association could be established based on cell configuration, service configuration (e.g. sidelink configuration, V2X configuration), control channel configuration, SR configuration, or MAC configuration. By this way, the UE can reduce control resource set for monitoring for reducing power consumption.
Option 3 (Monitoring specific control channel (e.g. default control channel, configured by network) regardless SR triggering event)—In this option, the UE will monitor specific control channel(s) regardless information carried by SR transmission.