Hybrid automatic repeat request (HARQ) scheme with in-sequence delivery of packets

A method, for use in a wireless communication system using a layered protocol, in which a first protocol layer (11b) of a sending terminal (11) sends packets as a sequence of data blocks to a peer first protocol layer (12b) of a receiving terminal (12), which delivers the packets to a higher protocol layer (12a), the method including:

• a) the sending terminal (11) assigning (41), in response to a sequence of data blocks for transmission to the receiving terminal (12), a respective data block sequence number to each data block in the sequence of data blocks;
• and
• b) the receiving terminal (12) delivering (38 44), in response to the sequence of data blocks and to the respective data block sequence numbers, at least some of the data blocks in the sequence of data blocks to the higher protocol layer (12a) of the receiving terminal (12) in order;
• the method characterized by:
• c) the receiving terminal (12) acknowledging receipt of the data blocks without providing information indicating the respective data block sequence numbers.