US 10,257,871 B2 · Device to-device communications apparatus and methods

Abstract

As a result of the selection/reselection operation, a wireless terminal (26) selects the high priority candidate frequency for use in the device-to-device (D2D) communications. During the cell selection/reselection operation, the wireless terminal (26) is required to consider selection/reselection candidate frequencies at which the wireless terminal (26) cannot receive or transmit device-to-device (D2D) signals to be of low priority candidate frequencies when the wireless terminal (26) is capable of device-to-device (D2D) communications and is receiving or transmitting, or anticipating receiving or transmitting, device-to-device (D2D) signals on device-to-device (D2D) supported frequencies. In another basic mode predefined RRC Idle Mode state transition(s) are used to determine when a wireless terminal (26) encounters an out-of-coverage situation for device-to-device (D2D) communications purposes; and when the out-of-coverage situation is determined, the wireless terminal (26) uses pre-configured device-to-device (D2D) radio resources for the device-to-device (D2D) communications.

Claims11

Dependent claims

A method carried out by a wireless terminal which is in wireless communications with a radio access node over a radio interface, the method comprising:

performing a cell selection/reselection operation;
and
setting one frequency to a highest priority frequency with respect to the cell selection/reselection operation while the wireless terminal is simultaneously performing:
(i) device-to-device (D2D) communications in a state where the wireless terminal camps on the one frequency;
and
(ii) the cell selection/reselection operation.

3 more elements

A wireless terminal of a communications network which communicates over a radio interface with a radio access node, the wireless terminal comprising:

a processor;
a memory in electronic communication with the processor;
instructions stored in the memory, the instructions being executable to:
perform a cell selection/reselection operation;
and
set one frequency to a highest priority frequency with respect to the cell selection/reselection operation while the wireless terminal is simulataneously performing:
(i) the device-to-device (D2D) communications in a state where the wireless terminal camps on the one frequency;
and
(ii) the cell selection/reselection operation.

6 more elements

Dependencies are inferred from the claim text.

Device to-device communications apparatus and methods

Life of this patent

Device to-device communications apparatus and methods

Life of this patent

Abstract

Claims11