Apparatus, method and computer program product providing retransmission utilizing multiple ARQ mechanisms

A computer program product tangibly embodying a program of machine-readable instructions executable by a digital processing apparatus to perform operations comprising:

• receiving over a wireless link at least one transport block;
• determining from the at least one transport block a first data unit, wherein a portion but not all of the first data unit includes a second data unit;
• determining information corresponding to acknowledgement status of the first data unit;
• determining, based at least on the information, whether a request should be performed requesting retransmission of the second data unit;
• and
• performing the request in response to a determination that the request should be performed.

A method comprising:

• determining information corresponding to acknowledgement status of a previously transmitted data unit that was transmitted over a wireless link using a transport block, wherein a portion but not all of the previously transmitted data unit includes a second data unit;
• determining, based at least on the information, whether retransmission of the second data unit should occur;
• and
• performing the retransmission of the second data unit in response to a determination that the retransmission should be performed.

A computer program product tangibly embodying a program of machine-readable instructions executable by a digital processing apparatus to perform operations comprising:

• determining information corresponding to acknowledgement status of a previously transmitted data unit that was transmitted over a wireless link using a transport block, wherein a portion but not all of the previously transmitted data unit includes a second data unit;
• determining, based at least on the information, whether retransmission of the second data unit should occur;
• and
• performing the retransmission of the second data unit in response to a determination that the retransmission should be performed.