Method of shifting redundancy version for the transmission of a transport block over multiple slots

An apparatus comprising:

• at least one processor;
• and
• at least one non-transitory memory and computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to:
• determine whether a user equipment should use a first method to determine a starting position of at least one redundancy version of a transport block in a circular buffer or a second method to determine the starting position of the at least one redundancy version of the transport block in the circular buffer, wherein the second method comprises determining the starting position of the at least one redundancy version based, at least partially, on one of:
• a position of another redundancy version of the transport block in the circular buffer, or
• a scaling factor;
• and
• transmit, from the apparatus, an indication to determine the starting position of at least the at least one redundancy version based on at least one of the first method or the second method,
• wherein the second method further comprises determining the starting position of the at least one redundancy version based, at least partially, on at least one scalar, and
• wherein the starting position of the at least one redundancy version is denoted as k0 and defined as:
• k0=mod(k′0+G+β,Ncb),
• where mod (A, B) is a modulo function which returns a remainder of a division of A by B, k′0 is a starting position of the other redundancy version, G is a size of the other redundancy version, β is a scalar of the at least one scalar, and Ncb is a size of the circular buffer.

A method comprising:

• determining a starting position of at least one redundancy version of a transport block in a circular buffer based, at least partially, on a position of another redundancy version of the transport block in the circular buffer;
• and
• transmitting one or more of the other redundancy version and/or the at least one redundancy version using the determined starting position of the at least one redundancy version of the transport block,
• wherein determining the starting position of the at least one redundancy version comprises determining the starting position of the at least one redundancy version based, at least partially, on at least one scalar, and
• wherein the starting position of the at least one redundancy version is denoted as k0 and defined as:
• k0=mod(k′0+G+β,Ncb),
• where mod (A, B) is a modulo function which returns a remainder of a division of A by B, k′0 is a starting position of the other redundancy version, G is a size of the other redundancy version, β is a scalar of the at least one scalar, and Ncb is a size of the circular buffer.

A non-transitory computer-readable medium comprising program instructions stored thereon which, when executed with at least one processor, cause the at least one processor to:

• determine a starting position of at least one redundancy version of a transport block in a circular buffer based, at least partially, on a position of another redundancy version of the transport block in the circular buffer;
• and
• transmit one or more of the other redundancy version and/or the at least one redundancy version using the determined starting position of the at least one redundancy version of the transport block,
• wherein the program instructions which, when executed by the at least one processor, cause the at least one processor to determine the starting position of the at least one redundancy version comprise program instructions which, when executed by the at least one processor, cause the at least one processor to determine the starting position of the at least one redundancy version based, at least partially, on at least one scalar, and
• wherein the starting position of the at least one redundancy version is denoted as k0 and defined as:
• k0=mod(k′0+G+β,Ncb),
• where mod (A, B) is a modulo function which returns a remainder of a division of A by B, k′0 is a starting position of the other redundancy version, G is a size of the other redundancy version, β is a scalar of the at least one scalar, and Ncb is a size of the circular buffer.