Handover request messaging and handling

A first base station comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the first base station to:
• receive, from a second base station, a handover request message comprising traffic pattern parameters of a traffic of a wireless device, the traffic pattern parameters comprising a first traffic periodicity, a first timing offset, and a first message size;
• send, to the second base station, a handover request acknowledge message indicating at least one periodic resource configuration parameter determined based on the first traffic periodicity;
• receive, from the wireless device, a random access preamble associated with a handover of the wireless device;
• and
• transmit, to the wireless device, a control command indicating:
• activation of radio resources associated with the at least one periodic resource configuration parameter;
• and
• a resource block assignment for the traffic of the wireless device.

A method comprising:

• receiving, by a first base station from a wireless device, an assistance information message comprising traffic pattern parameters of a traffic of the wireless device, the traffic pattern parameters comprising a first traffic periodicity, a first timing offset, and a first message size;
• sending, to a second base station, a handover request message comprising the traffic pattern parameters of the traffic of the wireless device;
• receiving, from the second base station, a handover request acknowledge message indicating at least one periodic resource configuration parameter for the wireless device;
• and
• transmitting, to the wireless device, a handover command message indicating the at least one periodic resource configuration parameter.