Dual link handover

A method of wireless communication at a source base station, comprising:

• sending, by the source base station to a wireless device, a connection reconfiguration message associated with a handover of the wireless device to a target base station;
• sending a data transmission to the wireless device after sending the connection reconfiguration message;
• and
• receiving a handover execution message from the target base station or the wireless device after the wireless device performs a successful access procedure for the target base station.

A method of wireless communication at a source base station, comprising:

• receiving, from a wireless device, an indication of a dual link handover capability of the wireless device;
• determining that a target base station does not support dual link handover;
• and
• refraining from transmission of a connection reconfiguration message associated with a handover of the wireless device to the target base station based at least in part on the determination that the target base station does not support dual link handover.

An apparatus for wireless communication for a user equipment (UE), comprising:

• means for receiving, by the UE, a first data transmission from a source base station, the UE having a medium access control (MAC) configuration, a radio link control (RLC) configuration, and a packet data convergence protocol (PDCP) configuration;
• means for receiving a connection reconfiguration message associated with a handover from the source base station to a target base station;
• means for performing an access procedure with the target base station based at least in part on receiving the connection reconfiguration message, wherein the UE is capable of receiving data transmissions from the source base station after receiving the connection reconfiguration message;
• and
• means for resetting the MAC configuration, resetting the RLC configuration, or reestablishing the PDCP configuration, or any combination thereof, based at least in part on performing the access procedure.

An apparatus for wireless communication at a source base station, comprising:

• means for sending, by the source base station to a wireless device, a connection reconfiguration message associated with a handover of the wireless device to a target base station;
• means for sending a data transmission to the wireless device after sending the connection reconfiguration message;
• and
• means for receiving a handover execution message from the target base station or the wireless device after the wireless device performs a successful access procedure for the target base station.

An apparatus for wireless communication at a source base station, comprising:

• means for receiving, from a wireless device, an indication of a dual link handover capability of the wireless device;
• means for determining that a target base station does not support dual link handover;
• and
• means for refraining from transmission of a connection reconfiguration message associated with a handover of the wireless device to the target base station, based at least in part on a determination that the target base station does not support dual link handover.

An apparatus for wireless communication for a user equipment (UE), comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive, by the UE, a first data transmission from a source base station, the UE having a medium access control (MAC) configuration, a radio link control (RLC) configuration, and a packet data convergence protocol (PDCP) configuration;
• receive a connection reconfiguration message associated with a handover from the source base station to a target base station;
• perform an access procedure with the target base station based at least in part on receiving the connection reconfiguration message, wherein the UE is capable of receiving data transmissions from the source base station after receiving the connection reconfiguration message;
• and
• reset the MAC configuration, reset the RLC configuration, or reestablish the PDCP configuration, or any combination thereof, based at least in part on performing the access procedure.

An apparatus for wireless communication at a source base station, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• send, to a wireless device, a connection reconfiguration message associated with a handover of the wireless device to a target base station;
• send a data transmission to the wireless device after sending the connection reconfiguration message;
• and
• receive a handover execution message from the target base station or the wireless device after the wireless device performs a successful access procedure for the target base station.

An apparatus for wireless communication at a source base station, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive, from a wireless device, an indication of a dual link handover capability of the wireless device;
• determine that a target base station does not support dual link handover;
• and
• refrain from transmission of a connection reconfiguration message associated with a handover of the wireless device to the target base station, based at least in part on a determination that a target base station does not support dual link handover.

A non-transitory computer-readable medium storing code for wireless communications for a user equipment (UE), the code comprising instructions executable to:

• receive, by the UE, a first data transmission from a source base station, the UE having a medium access control (MAC) configuration, a radio link control (RLC) configuration, and a packet data convergence protocol (PDCP) configuration;
• receive a connection reconfiguration message associated with a handover from the source base station to a target base station;
• perform an access procedure with the target base station based at least in part on receiving the connection reconfiguration message, wherein the UE is capable of receiving data transmissions from the source base station after receiving the connection reconfiguration message;
• and
• reset the MAC configuration, reset the RLC configuration, or reestablish PDCP configuration, or any combination thereof, based at least in part on performing the access procedure.

A non-transitory computer-readable medium storing code for wireless communications at a source base station, the code comprising instructions executable to:

• send, by the source base station to a wireless device, a connection reconfiguration message associated with a handover of the wireless device to a target base station;
• send a data transmission to the wireless device after sending the connection reconfiguration message;
• and
• receive a handover execution message from the target base station or the wireless device after the wireless device performs a successful access procedure for the target base station.

A non-transitory computer-readable medium storing code for wireless communications at a source base station, the code comprising instructions executable to:

• receive, from a wireless device, an indication of a dual link handover capability of the wireless device;
• determine that a target base station does not support dual link handover;
• and
• refrain from transmission of a connection reconfiguration message associated with a handover of the wireless device to the target base station, based at least in part on a determination that a target base station does not support dual link handover.