CROSS-LAYER ERROR RECOVERY OPTIMISATION IN WIRELESS SYSTEMS

摘要

Error recovery procedures in TCP/IP transmissions over radio channels (100) of wireless communication systems such as 3G LTE systems are optimised by suppressing transmission of standalone uplink TCP acknowledgment (TCP ACK) packets. Upon reception of a data packet at a base station (21) and a user equipment (10) involved in a transmission, the respective TCP ACK packet is generated along with a representation much shorter than the whole of the TCP ACK packet and the overhead added at the network, link and physical layers. The representation is calculated by applying the same hash function to the packet header. The representation calculated at the base station (21) is stored into a hash table (27) with the corresponding TCP ACK. The representation calculated at the user equipment (10) is transmitted back to the base station in place of the TCP ACK packet and serves as a reading address for retrieving the corresponding base station TCP ACK from the hash table (27) and releasing it to a data source (80).