ARQ PROTOCOL WITH PACKET-BASED RELIABILITY LEVEL SETTING

摘要

A communication device and method is provided, for which, when having implementations of first protocol that specifies different reliability level s for sending PDUs of a second protocol, where the second protocol specifies segmentation of PDUs of a third, higher layer protocol, a capability is introduced for setting the reliability level of second protocol (L2_ARQ) PDU s differently for second protocol PDUs belonging to a defined data structure containing such second protocol (L2_ARQ) data units. The defined data structure can be a higher layer protocol data unit or the send window. There by the delay caused by retransmission of second protocol data units can be reduced significantly.