Method and apparatus for supporting segmentation of packets for uplink transmission

摘要

A method and apparatus for segmenting medium access control (MAC) service data units (SDUs) creates enhanced MAC-es PDUs in the enhanced MAC-e/es sub-layer by concatenating MAC SDUs received from the logical channels. An enhanced transport format combination (E-TFC) selection entity controls the concatenation of MAC SDUs into enhanced MAC-es PDUs. When a MAC SDU is received that is too large to fit into a selected enhanced MAC-es PDU payload, a segmentation entity segments the MAC SDU such that the MAC SDU segment fills the remaining payload available in the selected enhanced MAC-es PDU. The enhanced MAC-es PDU is then assigned a transmission sequence number (TSN) and multiplexed with other enhanced MAC-es PDUs to create a single enhanced MAC-e PDU that is transmitted on the E-DCH in the next transmission time interval (TTI). A HARQ entity stores and, if necessary retransmits the enhanced MAC-e PDU when a transmission error occurs.

主权项

1. A radio network controller (RNC) comprising:
a medium access control (MAC) entity for an enhanced dedicated channel (E-DCH) configured to receive one or more MAC protocol data units (PDUs), wherein each MAC PDU includes a transmission sequence number (TSN) and a segmentation description field included in a header of a MAC PDU indicating whether the MAC PDU ends in a segment of a MAC service data unit (SDU) and a remaining segment of the MAC SDU is to be concatenated in another MAC PDU, and deliver one or more reassembled MAC PDUs to higher layers, the MAC entity comprising:
a disassembly entity configured to disassemble the received MAC PDUs, wherein the disassembly entity removes the header of the MAC PDUs;a reordering entity configured to reorder the received MAC PDUs, wherein the MAC PDUs are reordered using the TSN;a reassembly entity configured to reassemble the segmented MAC SDUs using the segmentation description field.