Patent ID: 9391743
Filing Date: 2016-07-12
CPC Classification: H04L

Claim Text:
1. A method comprising: providing for communications via a primary cell and at least one secondary cell in a time division duplex (TDD) network that supports carrier aggregation in accordance with different TDD uplink (UL)/downlink (DL) subframe configurations; and defining at least one of-UL or DL hybrid automatic repeat request (HARQ) timing to be the same for each of the primary and secondary cells having different TDD UL/DL subframe configurations and having different scheduled HARQ timings predetermined according to the different TDD UL/DL subframe configurations, by defining the UL HARQ timing to be the same as the predetermined UL HARQ timing of the primary or secondary cell having the TDD UL/DL subframe configuration with the fewest number of DL subframes or defining the DL HARQ timing to be the same as the predetermined DL HARQ timing of the primary or secondary cell having the TDD UL/DL subframe configuration with the fewest number of UL subframes independent of whether any of the primary or secondary cell has a predetermined UL or DL HARQ timing that provides for an earlier available subframe for providing feedback for the UL or DL HARQ, such that feedback for the UL HARQ is provided for both the primary and secondary cell in only one or more DL subframes corresponding to the respective predetermined UL HARQ timing of the primary or secondary cell having the TDD UL/DL subframe configuration with the fewest number of respective DL subframes or such that feedback for the DL HARQ is provided for both the primary and secondary cell in only one or more respective UL subframes corresponding to the respective predetermined DL HARQ timing of the primary or secondary cell having the TDD UL/DL subframe configuration with the fewest number of respective UL subframes, and without allowing any uplink or downlink HARQ feedback at a subframe timing where there is an uplink subframe configured for one of the primary or secondary cell and a downlink subframe configured for the other of the primary or secondary cell, and all HARQ feedback is transmitted or received in the primary cell.