Methods and arrangements for handover during device-to-device communication

摘要

A method for a first communication device adapted to perform cellular network assisted device-to-device communication with at least a second communication device is disclosed. The first communication device has a communication link to a first network node. Initially, one of the first and the second communication devices has a network control signal gateway function. The gateway function comprises receiving downlink control signals from a respective network node, transmitting uplink control signals to the respective network node, and operating all device-to-device communication control signaling related to the first and second devices in association with the downlink and uplink control signals. The method comprises detecting a cell of a second network node as a prospect target cell for handover, ensuring that the first device does not have the gateway function, and performing a handover of a cellular communication of the first communication device from the first network node to the second network node. Corresponding computer program product, arrangement and communication device are also disclosed.