PHICH-less operation for uplink-downlink configuration zero

摘要: Various communication systems may benefit from techniques for handling inter-band carrier aggregation (CA). For example, of the third generation partnership project (3GPP) long term evolution (LTE) advanced (LTE-A) a uplink (UL) downlink (DL) configuration zero handling, particularly in cases where there is no physical hybrid automatic repeat request (HARQ) indicator channel (PHICH). certain embodiments be applicable to CA having different UL/DL use. A method can include triggering subframe first shared transmission process. The also second secondary cell configured with time division duplex uplink/downlink number zero. triggerings performed by means single grant but without indicator.