PHYSICAL HYBRID ARQ INDICATOR CHANNEL (PHICH) RESOURCE ALLOCATION Russian patent published in 2016 - IPC H04L1/18 

FIELD: radio engineering and communications.

SUBSTANCE: method includes: determining that a first time division duplex (TDD) component carrier (CC) with a first uplink (UL)/downlink (DL) subframe configuration is cross-carrier scheduled by a second CC with a second UL/DL-subframe configuration, determining a hybrid automatic repeat request (HARQ) timing of uplink transmissions on the first CC, determining availability of physical HARQ indicator channel resources, uplink transmissions on the first CC.

EFFECT: to provide sufficient PHICH resources when performing a cross sceduling operation for the uplink transmission acknowledgement in subframes of the time division duplex component carrier.

42 cl, 1 tbl, 17 dwg