HANDOVER OF DEVICE-TO-DEVICE (D2D) USER EQUIPMENT (UE) DEVICES USING D2D SUBFRAMES WITH CELL IDENTIFIERS

摘要

A Device-to-device (D2D) user equipment (UE) device communicating with another D2D UE device within a first cell transmits a D2D subframe that includes a cell identifier a second cell when the UE device moves from the first cell to the second cell. After a handover to the second cell is initiated, the D2D UE device can suspend D2D communication. The D2D UE device transmits the D2D subframe, such as D2D discovery subframe, identifying the second cell when the handover is complete. The other D2D UE device identifies the second cell to the base station providing the first cell. The base stations providing the first cell and the second cell coordinate to determine resources for D2D communication between the D2D UE devices.

主权项

1. A method performed at a device-to-device (D2D) user equipment (UE) device, the method comprising:
communicating with another D2D UE device using D2D communication while the D2D UE device and the another D2D UE device are located within a first cell provided by a first base station; transmitting a D2D subframe to the another D2D UE device after a handover from the first cell to a second cell is complete, the D2D subframe conveying a cell identifier identifying the second cell; transmitting a D2D request to a second base station providing the second cell; receiving, from the second base station, communication resource information identifying D2D communication resources; and continuing D2D communication with the another D2D UE device using the D2D communication resources.