A wireless device sends, to a base station on a satellite, a first message comprising a capability parameter indicating that the wireless device supports a store and forward (SF) mode. The wireless device receives one or more second messages including a feeder link information indicating a period when a feeder link of the satellite is available, a second parameter indicating that a network operates in the SF mode, and a third parameter indicating a supported time delay of an uplink data packet sent in the SF mode. The wireless device sends, to the base station and after receiving the one or more second messages, one or more third messages including a first uplink data packet sent in the SF mode, and a validity time information associated with the first uplink data packet sent in the SF mode.