Handover procedures involving sidelink communications

A method of handover in wireless communications comprising:

• transmitting, by a first base station to a first user equipment (UE), one or more first messages comprising:
• measurement configuration parameters;
• and
• first configuration parameters comprising sidelink parameters, wherein the first configuration parameters are associated with a first cell;
• receiving, by the first base station from the first UE, a measurement report based on the measurement configuration parameters;
• responsive to the measurement report, transmitting, by the first base station to the second base station, a handover request message for handover of the first UE from the first cell of the first base station to a second cell of the second base station;
• receiving, by the first base station from the second base station, a handover request acknowledge message comprising second configuration parameters of the second cell of the second base station, wherein the second configuration parameters do not comprise sidelink parameters;
• and
• transmitting, by the first base station to the first UE, a second message comprising the second configuration parameters indicating a handover from the sidelink of the first cell to an uplink of the second cell.

A method of handover in wireless communications comprising:

• receiving, by a first user equipment (UE) from a first base station, one or more first messages comprising:
• measurement configuration parameters;
• and
• first configuration parameters, of a first cell, not comprising sidelink parameters;
• transmitting, by the first UE to the first base station, a measurement report based on the measurement configuration parameters;
• responsive to the transmitted measurement report, receiving, by the first UE from the first base station, a second message comprising second configuration parameters of a second cell of a second base station, wherein the second configuration parameters comprise sidelink parameters;
• and
• switching, from the first cell of the first base station to the second cell of the second base station, wherein an uplink of the first cell is handed over to the sidelink of the second cell.

A method of handover in wireless communications comprising:

• transmitting, by a first base station to a first user equipment (UE), one or more first messages comprising:
• measurement configuration parameters;
• and
• first configuration parameters, of a first cell, not comprising sidelink parameters;
• receiving, by the first base station from the first UE, a measurement report based on the measurement configuration parameters;
• responsive to the received measurement report, transmitting, by the first base station to the second base station, a handover request message for handover of the first UE from the first cell of the first base station to a second cell of the second base station;
• receiving, by the first base station from the second base station, a handover request acknowledge message comprising second configuration parameters of the second cell of the second base station, wherein the second configuration parameters comprise sidelink parameters;
• and
• transmitting, by the first base station to the first UE, a second message comprising the second configuration parameters indicating a handover from an uplink of the first cell to the sidelink of the second cell.