Radio resource allocation for D2D communications

摘要

Systems and methods for switching radio resource allocation for User Equipment (UE) enabled for a device-to-device (D2D) communication. One embodiment is a base station that switches resource allocation between Mode 1, Mode 2, and a transition mode. For the transition mode, one or more parameters have a value in a range between a value specified in Mode 1 and a value specified in Mode 2 for the parameter(s). The base station detects movement of the UE from in-coverage of the base station to edge-of-coverage, and initiates switching of the resource allocation for the UE from Mode 1 to the transition mode. The base station then detects movement of the UE from edge-of-coverage of the base station to out-of-coverage, and initiates switching of the radio resource allocation for the UE from the transition mode to Mode 2.

主权项

1. An apparatus comprising:
a base station of a radio access network, the base station comprising:
a processor configured to switch radio resource allocation for User Equipment (UE) that is enabled for device-to-device (D2D) communication between Mode 1, Mode 2, and a transition mode;wherein Mode 1, Mode 2, and the transition mode each specify parameters for allocating radio resources of the UE for D2D communication;wherein Mode 1 specifies first values for the parameters, Mode 2 specifies second values for the parameters, and the transition mode specifies third values for the parameters;wherein for at least one of the parameters, the transition mode specifies a third value in a range between a first value specified in Mode 1 and a second value specified in Mode 2 to smoothen a transition of the radio resource allocation for the UE between Mode 1 and Mode 2;the processor is configured to detect a first movement of the UE from in-coverage of the base station to edge-of-coverage of the base station, and to initiate switching of the radio resource allocation for the UE from Mode 1 to the transition mode in response to the first movement of the UE;the processor is configured to detect a second movement of the UE from edge-of-coverage of the base station to out-of-coverage of the base station, and to initiate switching of the radio resource allocation for the UE from the transition mode to Mode 2 in response to the second movement of the UE.