US Patent No. 10,172,174

SELECTION BETWEEN CELLULAR COMMUNICATION LINK AND DEVICE-TO-DEVICE (D2D) COMMUNICATION LINK USING REFERENCE SIGNALS


Patent No. 10,172,174
Issue Date January 01, 2019
Title Selection Between Cellular Communication Link And Device-to-device (d2d) Communication Link Using Reference Signals
Inventorship Amit Kalhan, San Diego, CA (US)
Henry Chang, San Diego, CA (US)
Assignee Kyocera Corporation, Kyoto (JP)

Claim of US Patent No. 10,172,174

1. A method comprising:instructing a first user equipment (UE) device to transmit a reference signal;
receiving, from a second UE device, device-to-device (D2D) channel characteristic information indicative of a D2D communication link between the first UE device and the second UE device, the D2D channel characteristic information determined from UE device received reference signal that is the reference signal transmitted by the first UE device as received at the second UE device;
determining cellular channel characteristic information indicative of at least a portion of a cellular communication link through a base station and between the first UE device and the second UE device; and
selecting, at the base station, a transmission link from the cellular communication link and the D2D communication link for transmitting data between the first UE device and the second UE device, the selecting based at least in part on the cellular channel characteristic information and the D2D channel characteristic information.