SYSTEM AND METHOD TO INCREASE LINK ADAPTATION PERFORMANCE WITH MULTI-LEVEL FEEDBACK
A method and apparatus for explicit adaptive modulation and coding scheme selection, the method receiving, at a mobile device, a transport block targeted to the mobile device, and if a quality of the received transport block exceeds a threshold, providing an acknowledgment or negative acknowledgment to a network element; and if the quality of the received transport block is below the threshold, suppressing the acknowledgment or negative acknowledgement.
1 . A method of explicit adaptive modulation and coding scheme selection comprising:
receiving, at a mobile device, a transport block targeted for the mobile device;
if a quality of the received transport block exceeds a threshold, providing an acknowledgment or negative acknowledgment to a network element; and
if the quality of the received transport block is below the threshold, suppressing the acknowledgment or negative acknowledgement.
2 . The method of claim 1 , wherein the transport block is received over a high speed downlink packet access channel.
3 . The method of claim 2 , wherein the acknowledgement or negative acknowledgement are hybrid automatic repeat request responses.
4 . The method of claim 1 , wherein the network element is an element within a long term evolution network.
5 . The method of claim 1 , wherein the quality is determined to be below the threshold based on a Yamamato bit that provides a binary indication of quality of the transport block.
6 . The method of claim 1 , wherein, due to the suppressing, the network element chooses a new modulation and coding scheme to send data from the transport block to the mobile device.
7 . The method of claim 1 , wherein the threshold is chosen based on a probability of successfully decoding a subsequent transport block utilizing an existing modulation and coding scheme.
8 . The method of claim 1 , wherein the threshold is set higher if the network element uses chase combining rather than incremental redundancy.
9 . A mobile device comprising:
a processor;
a communications subsystem; and
memory,
wherein the processor, communications subsystem and memory cooperate to:
receive a transport block targeted for the mobile device;
if a quality of the received transport block exceeds a threshold, providing an acknowledgment or negative acknowledgment to a network element; and
if the quality of the received transport block is below the threshold, suppressing the acknowledgment or negative acknowledgement.
10 . The mobile device of claim 9 , wherein the transport block is received over a high speed downlink packet access channel.
11 . The mobile device of claim 10 , wherein the acknowledgement or negative acknowledgement are hybrid automatic repeat request responses.
12 . The mobile device of claim 9 , wherein the mobile device operates in a long term evolution network.
13 . The mobile device of claim 9 , wherein the quality is determined to be below the based on a Yamamato bit that provides a binary indication of quality of the transport block.
14 . The mobile device of claim 9 , wherein, due to the suppressing, the network element chooses a new modulation and coding scheme to send data from the message to the mobile device.
15 . The mobile device of claim 9 , wherein the threshold is chosen based on a probability of successfully decoding a subsequent message utilizing an existing modulation and coding scheme.
16 . The mobile device of claim 9 , wherein the threshold is set higher if the network element uses chase combining rather than incremental redundancy.