ADAPTING INTER-BAND HARQ TO SUPPORT FLEXIBLE TDD SUBFRAME CONFIGURATION

摘要

Hybrid automatic repeat request (HARQ) timing rules for carrier aggregation network deployments, where a primary and a secondary cell simultaneously utilize different time division duplex (TDD) uplink-downlink (UL-DL) subframe configurations, are re-used for flexible TDD UL-DL subframe configuration network deployments in which a same cell changes the TDD UL-DL configuration between first and second configuration periods. This re-use is accomplished in one embodiment by mapping a data radio resource in the first configuration period to a feedback radio resource in the second configuration period according to the re-used HARQ timing rules. Depending on uplink/downlink and the perspective is of the mobile device or the network, the mapped feedback radio resource is used to search for or to send HARQ feedback. Non-limiting examples re-use self-scheduling and cross-scheduling rules as well as regard the configuration in the first/second configuration period as the scheduled/scheduling cell of the HARQ timing rules.