System and method for power control command for device-to-device transmissions

摘要

A transmit power control rule for device-to-device (D2D) transmissions may not be necessary during periods in which no uplink transmissions are scheduled to be received by an enhanced Node B base station (eNB). When uplink transmissions are not scheduled to be received by the eNB, the eNB may send a transmit power control (TPC) command to a D2D capable user equipment (D2D UE) that instructs the D2D UE to perform a D2D transmission at a pre-defined transmit power level (e.g., maximum transmit power level). When uplink transmissions are scheduled to be received the eNB, the eNB may send a TPC command to the D2D UE that instructs the D2D UE to perform a D2D transmission at a transmit power level defined by a power control rule.

主权项

1. A method for power control command for device-to-device (D2D) communications in a wireless communication network, the method comprising:
establishing, by a base station, a link with a user equipment (UE) in a cell, wherein the UE is configured to perform a D2D transmission to one or more UEs; and sending, by the base station, a transmit power control (TPC) command to the UE, the TPC command instructing the UE to perform the D2D transmission at a pre-defined transmit power level when no uplink transmissions are scheduled to be received by the base station over the time-frequency resources available to carry the D2D transmission and at a transmit power level defined by a power control rule when at least one uplink transmission is scheduled to be received by the base station over the time-frequency resources available to carry the D2D transmission, the transmit power level defined by power control rule being lower than the pre-defined transmit power level such that the TPC command improves D2D performance when no uplink transmissions are scheduled to be received by the base station over the time-frequency resources available to carry the D2D transmission.