METHOD AND APPARATUS PROVIDING MULTIPLE TEMPORARY BLOCK FLOW (TBF) MAPPING TO UPPER LAYER WHEN OPERATING IN GSM/EDGE RADIO ACCESS NETWORK (GERAN) A/Gb MODE

摘要

Disclosed is a wireless communications system (5), in the preferred embodiment a GSM/EDGE Radio Access Network system (300), that includes a Logical Link Control (LLC) layer (265) of a mobile station (100) and a LLC layer (30E) of a Serving General Packet Radio Service Support Node (SGSN) (30) that are coupled together through a Gb interface (310). The system (5) operates for establishing and operating a plurality of Temporary Block Flows (TBF) for transferring Packet Data Units (PDUs) in either an uplink or a downlink direction between the LLC (265) layer of the mobile station (100) and the LLC (30E) layer of the SGSN node (30). The system (5) operates at a level of the LLC (30E) layer and a Radio Link Control (RLC) (260) layer for distinguishing PDUs belonging to a first TBF from PDUs belonging to a second TBF based on information associated with each PDU, and maps PDUs into the appropriate one of the first TBF or the second TBF on the information.