Patent ID: 9686089
Date: 2017-06-20
CPC Classifications: H04J,H04L,H04N,H04W,Y02D

Claim:
1. A system comprising: a receiver to receive, at a user equipment (UE), an indication of an uplink/downlink (UL-DL) subframe configuration of a scheduling cell in a wireless time-division duplex (TDD) system that utilizes cross-carrier scheduling; the receiver further to receive an indication of a UL-DL subframe configuration of a scheduled cell in the wireless TDD system that utilizes the cross-carrier scheduling, the UL-DL subframe configuration of the scheduled cell being different from the UL-DL subframe configuration of the scheduling cell, wherein transmission on a component carrier (CC) of the scheduled cell is based on a resource allocation received on a CC of the scheduling cell; and a processor to identify a reference UL-DL subframe configuration based at least in part on the UL-DL subframe configurations of the scheduling cell and scheduled cell; and wherein the receiver is further to receive, from the scheduling cell of an enhanced NodeB (eNB), a hybrid automatic repeat request (HARQ) signal of the scheduled cell according to a subframe timing of the reference UL-DL subframe configuration; wherein: the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 1 and the UL-DL subframe configuration of the scheduled cell is equal to 2, 4, or 5; the reference UL-DL subframe configuration is equal to 2 if the UL-DL subframe configuration of the scheduling cell is equal to 2 and the UL-DL subframe configuration of the scheduled cell is equal to 5; the reference UL-DL subframe configuration is equal to 3 if the UL-DL subframe configuration of the scheduling cell is equal to 3 and the UL-DL subframe configuration of the scheduled cell is equal to 4 or 5; and the reference UL-DL subframe configuration is equal to 4 if the UL-DL subframe configuration of the scheduling cell is equal to 4 and the UL-DL subframe configuration of the scheduled cell is equal to 5.