User equipment and a radio network node, and methods therein for device-to-device communication

摘要

Embodiments relate to device-to-device (D2D) communications in a communications network (1), wherein the communications network (1) comprises a first user equipment (10), a first radio network node (14) serving the first user equipment (10), a second user equipment (12). and a D2D capable radio network node (18,18). The first user equipment (TO) is configured to recognize a second user equipment (12) to have a D2D communication with and to perform a cell change from the first radio network node (14) to the D2D capable radio network node (16,18), when the first radio network node (14) does not have D2D capability.

主权项

1. A method in a first user equipment for handling device-to-device, D2D, communications in a communications network, wherein the communications network comprises a first user equipment, a first radio network node serving the first user equipment, a second user equipment, and a D2D capable radio network node, wherein the method comprises:
recognizing a second user equipment to have a D2D communication with; transmitting first D2D capability information associated with the first radio network node serving the first user equipment to the second user equipment; receiving second D2D capability information associated with the D2D capable radio network node and a request from the second user equipment to change from the first radio network node to the D2D capable radio network node; and performing a cell change from the first radio network node to the D2D capable radio network node, when the first radio network node does not have D2D capability.