METHOD AND ARRANGEMENT FOR RETRANSMISSION OF PACKETS IN THE BASE STATION SUB-SYSTEM

摘要

The present invention relates to a base station sub-system of GSM-based communication networks, e.g. applied for GPRS, and intends an efficient bandwidth usage for data transmission in acknowledged mode via the Abis-transport network. This is achieved by a data transmission that reduces the amount of retransmitted data, which is caused due to transmission errors, for parts of the network that have not been affected by said error while the overall flow control remains at the site of the sending unit, e.g. the Base Station Controller. Each transmitted data block is stored in an intermediate network unit, e.g. a Base Transceiver Station, together with a unique identification information. In case of a retransmission due to an error on the radio access network the Base Station Controller retransmits the unique identification information by help of which the Base Transceiver Station can retrieve and retransmit the missing data block.