A wireless device, network nodes and methods therein for handling a device-to-device (d2d) communication during handover in a wireless telecommunications network

摘要

Some previous wireless telecommunications networks do not have appropriate methods for handling a D2D communication during handover of wireless device. Disclosed herein is a method performed by a first wireless device for handling a device-to-device, D2D, communication with a second wireless device, the second wireless device being served by a first network node, during handover of the first wireless device from a source network node, wherein the source network node may be the first network node or another network node, to a target network node in a wireless telecommunications network. The method comprises a step of interrupting the D2D communication. The method comprises a step of determining a first uplink timing difference as the difference between the uplink timing to the source network node and the uplink timing to the target network node. The method comprises a step of reconfiguring the D2D communication based on the first uplink timing difference. The method comprises a step of re-starting the D2D communication, as reconfigured, with the second wireless device, the second wireless device being served by the first network node after handover. The reconfiguring step further comprises transmitting the determined first uplink timing difference to the target network node after the handover has been completed and receiving a scheduling scheme for the D2D communication from the target network node, which scheduling scheme indicates time locations of sub-frames in which transmission resources may be allocated for the D2D communication.