METHOD AND APPARATUS FOR CONTROLLING A HANDOVER BETWEEN UTRA R6 CELLS AND R7 CELLS

摘要

A method and apparatus for controlling an optimization of handover procedures between universal terrestrial radio access (UTRA) release 6 (R6) cells and UTRA release 7 (R7) cells are disclosed. When a wireless transmit/receive unit (WTRU) is moving between an R6 cell and an R7 cell, or between R7 cells, a handover is initiated from a source Node-B to a target Node-B. In the R7 cell, the enhanced medium access control (MAC) functionality including flexible radio link control (RLC) protocol data unit (PDU) size and high speed MAC (MAC-hs) segmentation and multiplexing of different priority queues are supported. After the handover, a MAC layer and/or an RLC layer are reconfigured or reset based on functionality supported by the target Node-B.

主权项

1. A method of resetting a medium access control (MAC) unit, the method comprising:
receiving, from a radio resource control (RRC) unit, an enhanced high speed MAC (MAC-ehs) reset request; flushing a hybrid automatic repeat request (HARQ) soft buffer in the MAC unit for all configured HARQ processes; stopping a re-ordering release timer and a MAC-ehs re-ordering timer; performing a re-ordering of received MAC-ehs protocol data units (PDUs) using at least one variable; setting the timers and the variable to their initial values; delivering all re-ordering PDUs in a re-ordering queue of the MAC unit to a reassembly unit located in the MAC unit; performing reassembly of segmented MAC-ehs service data units (SDUs); delivering successfully reassembled MAC-ehs SDUs to a logical channel identifier (LCH-ID) demultiplexing unit of the MAC unit; delivering the complete MAC SDUs to the correct logical channel or MAC flow; discarding stored MAC-ehs SDU segments from a reassembly unit of the MAC unit; and flushing the re-ordering queue.