ENB PDCCH implementation to avoid ambiguous DCI information

An apparatus for wireless communication, comprising:

• means for determining a first starting index for transmitting a first control message in a first search space;
• means for determining a second starting index for transmitting a second control message in a second search space;
• and
• when the first starting index and the second starting index have the same value:
• means for determining at least one information field different between the first control message and the second control message,
• means for determining whether the at least one different information field in the second control message would have a different interpretation when decoded based on the first search space than when decoded based on the second search space, and
• means for setting a bit of the at least one different information field to zero in the second control message when the at least one information field in the second control message would have a different interpretation when decoded based on the first search space than when decoded based on the second search space.

An apparatus for wireless communication, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• determine a first starting index for transmitting a first control message in a first search space;
• determine a second starting index for transmitting a second control message in a second search space;
• and
• when the first starting index and the second starting index have the same value:
• determine at least one information field having a respective bit different between the first control message and the second control message,
• determine whether the at least one different information field in the second control message would have a different interpretation when decoded based on the first search space than when decoded based on the second search space, and
• set a bit of the at least one different information field to zero in the second control message when the at least one information field in the second control message would have a different interpretation when decoded based on the first search space than when decoded based on the second search space.

A non-transitory computer-readable medium storing computer executable code, comprising code for:

• determining a first starting index for transmitting a first control message in a first search space;
• determining a second starting index for transmitting a second control message in a second search space;
• and
• when the first starting index and the second starting index have the same value:
• determining at least one information field having a respective bit different between the first control message and the second control message,
• determining whether the at least one different information field in the second control message would have a different interpretation when decoded based on the first search space than when decoded based on the second search space, and
• setting a bit of the at least one different information field to zero in the second control message when the at least one information field in the second control message would have a different interpretation when decoded based on the first search space than when decoded based on the second search space.