Packing source data packets into transporting packets with fragmentation

摘要

A communication system and method are disclosed for transmitting packets of information in at least one first format over a communications link that utilizes packets of information in a second format. In certain embodiments, the packets of information in a first format are converted to packets of information in the second format prior to transmission via the communications link by packing and fragmenting the information in the first format in a coordinated manner. Embodiments may also utilize packing subheaders and fragmentation control bits in the packing and fragmentation processes.

主权项

1. A base station for a wireless communications system operable to pack and fragment variable length service data units (SDU) into variable length protocol data units (PDU), the base station comprising:
at least one processor operable to: participate in a routine to establish a wireless downlink communications link between the base station and a mobile subscriber unit; allocate data carrying capacity for the wireless downlink communications link for a current downlink frame, based at least in part on a priority of a service, the data carrying capacity variable per downlink frame; establish a length of a PDU based at least in part on the data carrying capacity allocated to the wireless downlink communications link in the current downlink frame, the length of the PDU variable per downlink frame; pack a first SDU of a plurality of SDUs into a payload area of the PDU, each of the SDUs of the plurality of SDUs of variable length, the first SDU associated with the service; determine whether a second SDU of the plurality of SDUs is larger than a remaining payload area of the PDU; on a condition that the second SDU of the plurality of SDUs is not larger than the remaining payload area of the PDU, pack the second SDU of the plurality of SDUs into at least a portion of the remaining payload area of the PDU; and on a condition that the second SDU of the plurality of SDUs is larger than the remaining payload area of the PDU, fragment the second SDU of the plurality of SDUs into at least a first fragment and a second fragment, and pack the first fragment into the remaining payload area of the PDU.