(H)ARQ FOR SEMI-PERSISTENT SCHEDULING

摘要

A radio communications link is established between radio stations, and a semi-persistent radio resource is allocated to support data transmission ove r the communications link. The semi-persistent radio resource is associated with a corresponding automatic repeat request (ARQ) process identifier. Non- limiting examples of a semi-persistent radio resource include a regularly sc heduled transmission time interval, frame, subframe, or time slot during whi ch to transmit a data unit over the radio interface. Retransmission is reque sted of a data unit transmitted using the semi-persistent radio resource. Th e ARQ process identifier associated with the semi-persistent resource is use d to match a retransmission of a data unit dynamically scheduled on the comm unications link with the requested data unit retransmission. In a preferred example embodiment, the ARQ process identifier is a hybrid ARQ (HARQ) proces s, where a retransmitted data unit is combined with a previously-received ve rsion of the data unit.