Patent ID: 8705489

Claim:
A wireless transmit/receive unit (WTRU) comprising: a radio resource control (RRC) unit; and a medium access control (MAC) unit comprising: a hybrid automatic repeat request (HARQ) hard buffer; a re-ordering queue including a re-ordering release timer and an enhanced high speed MAC (MAC-ehs) re-ordering timer; a reassembly unit; and a logical channel identifier (LCH-ID) demultiplexing unit, the MAC unit configured to: receive a MAC-ehs reset message from the RRC unit, wherein the MAC-ehs reset message includes at least one of a downlink high speed MAC (MAC-hs) reset indicator and an indication of MAC-hs configuration; flush the HARQ soft buffer for all configured HARQ processes; stop the re-ordering release timer and the MAC-ehs re-ordering timer, wherein the re-ordering queue performs re-ordering of received MAC-ehs protocol data units (PDUs) using at least one variable; set the timers and the variable to their initial values; deliver all re-ordering PDUs in the re-ordering queue to the reassembly unit, wherein the reassembly unit performs reassembly of segmented MAC-ehs service data units (SDUs), delivers successfully reassembled MAC-ehs SDUs to the LCH-ID demultiplexing unit, which delivers the complete MAC SDUs to the correct logical channel or MAC flow, discards stored MAC-ehs SDU segments from the reassembly unit; and flush the re-ordering queue.