METHOD AND APPARATUS FOR TRANSMITTING DATA PACKETS AND METHOD AND APPARATUS FOR RECEIVING DATA PACKETS

摘要

The invention relates to a data packet structure for conveying data of service data units (SDU) using protocol data units (PDU). The data packet comprise a data packet payload comprising at least one protocol data unit (PDU), wherein a protocol data unit (PDU) comprises a service data unit (SDU) or a fragment of a service data unit; and a data packet header comprising an indicator (FFF,SFF) indicating whether or not the data packet payload begins with a protocol data unit (PDU) being a fragment of a service data unit and whether or not the data packet payload ends with a protocol data unit (PDU) being a fragment of a service data unit.

主权项

1. A data transmission method comprising:
segmenting or concatenating, by one or more processors, radio layer control (RLC) service data units (SDUs) to RLC protocol data units (PDUs) that fit within a size of a total size of RLC PDU(s) indicated by a lower protocol layer processor, each RLC PDU having a header and a data field; mapping, by the one or more processors, a single two bit field including a first bit and a second bit to the header for each of the RLC PDUs, wherein a number of bits included in the single two bit field is two regardless of a number of SDUs included in the data field; the first bit and the second bit indicating only (i) whether or not the data field of its corresponding RLC PDU begins with a segment of an RLC SDU, and (ii) whether or not the data field ends with a segment of an RLC SDU; transmitting, by a transmitter, a data packet including one or more of the RLC PDUs.