System for efficient recovery of node-b buffered data following mac layer reset
AssigneeInterDigital Technology Corporation
InventorsStephen E. Terry, Yi-Ju Chao
Life of this patent
Estimating the term…
Abstract
A method and system for the UE and RNC to reduce transmission latency and potentially prevent loss of PDUs upon a MAC-hs layer reset. The RNC generates a radio resource control (RRC) message with a MAC-hs reset indication. The MAC reset indication requires the UE to flush buffers for configured HARQ processes, disassemble MAC protocol data units (PDUs) in the reordering buffers, deliver MAC-d PDUs to a MAC-d layer, and configure the MAC-hs to receive new data.
Claims12
A method for use in a radio network controller (RNC) comprising:
- sending a radio resource control (RRC) message to a user equipment (UE) that triggers a high-speed downlink shared channel (HS-DSCH) cell change, wherein the RRC message includes an identifier that a MAC-hs is to be reset,
- wherein the MAC-hs reset requires the UE to flush MAC-hs packet data units (PDUs) stored in reordering buffers for configured hybrid automatic repeat request (HARQ) processes, disassemble MAC-hs PDUs and deliver the MAC-d PDUs to a MAC-d layer, and configure the MAC-hs to receive new data.
A radio network controller (RNC) comprising:
- a controller configured to send a radio resource control (RRC) message to a user equipment (UE) that triggers a high-speed downlink shared channel (HS-DSCH) cell change, wherein the RRC message includes an identifier that a MAC-hs is to be reset,
- wherein the MAC-hs reset requires the UE to flush MAC-hs packet data units (PDUs) stored in reordering buffers for configured hybrid automatic repeat request (HARQ) processes, disassemble MAC-hs PDUs and deliver the MAC-d PDUs to a MAC-d layer, and configure the MAC-hs to receive new data.
A method for use in a user equipment (UE) comprising:
- receiving a radio resource control (RRC) message from a radio network controller (RNC) that triggers a high-speed downlink shared channel (HS-DSCH) cell change, wherein the RRC message includes an identifier that a MAC-hs is to be reset;
- flushing MAC-hs packet data units (PDUs) stored in reordering buffers for configured hybrid automatic repeat request (HARQ) processes;
- disassembling MAC-hs PDUs and delivering the MAC-d PDUs to a MAC-d layer;
- and
- configuring the MAC-hs to receive new data.
A user equipment (UE) comprising:
- a controller configured to receive a radio resource control (RRC) message from a radio network controller (RNC) that triggers a high-speed downlink shared channel (HS-DSCH) cell change, wherein the RRC message includes an identifier that a MAC-hs is to be reset;
- the controller further configured to flush MAC-hs packet data units (PDUs) stored in reordering buffers for configured hybrid automatic repeat request (HARQ) processes;
- the controller further configured to disassemble MAC-hs PDUs and deliver the MAC-d PDUs to a MAC-d layer;
- and
- the controller further configured to configure the MAC-hs to receive new data.
Dependencies are inferred from the claim text.