Telecommunications apparatus and methods including selecting a TBS based on an indicated maximum TBS

A method of operating a network infrastructure equipment for receiving a first amount of data from a terminal device, the method comprising:

• transmitting to the terminal device an indication of an allocation of communications resources, the allocated communications resources sufficient for transmitting a second amount of data by the terminal device,
• receiving signals representing the first amount of the data, the signals transmitted by the terminal device using a portion of the allocated communications resources;
• and
• determining a selected transport block size (TBS) selected by the terminal device for the transmission of the first amount of the data based on the received signals, wherein the selected TBS is smaller than or equal to the second amount of data, wherein
• the allocated communications resources comprise a first number of physical resource blocks (PRBs), each PRB being characterized by a time period and a predetermined frequency range, and
• the portion of the allocated communications resources comprises a second number of PRBs, the second number of PRBs lower than the first number of PRBs.

A terminal device for transmitting a first amount of data, wherein the terminal device comprises:

• controller circuitry and transceiver circuitry configured such that the terminal device is operable to
• receive an indication of an allocation of communications resources, the allocated communications resources sufficient for transmitting a second amount of data, the second amount of data greater than or equal to the first amount of the data;
• determine a plurality of permitted transport block size (TBS) values, wherein each of the permitted TBS values is no larger than the second amount;
• select a transport block size, TBS, for the transmission of the first amount of data, based on the first amount, wherein the selected TBS is selected from the plurality of permitted TBS values;
• determine communications resources for transmitting the first amount of the data based on the selected TBS and the allocated communications resources;
• and
• transmit the first amount of the data using the determined communications resources.