Method and apparatus for allocating terminal identifiers based on communication function

A base station apparatus for communicating with a wireless terminal apparatus with radio communication, the base station apparatus comprising:

• a transmission circuitry for transmitting a data packet including control information and communication data;
• and
• a control circuitry that uses at least a first identification method and a second identification method,
• wherein:
• the control information included in the data packet includes a first region to identify a terminal apparatus and a second region to control the wireless communication,
• a sum of an amount of information bits of the first region and an amount of information bits of the second region is constant,
• the amount of information bits of the first region is one of a first information amount and a second information amount,
• the first region is used for one of a first terminal identifier for the first identification method and a second terminal identifier for the second identification method,
• all information bits in the first region are used to identify the terminal apparatus,
• a first communication method uses the first identification method and the first region that has the first information amount,
• a second communication method uses the second identification method and the first region that has the second information amount,
• the first information amount is greater than the second information amount, and
• the control circuitry is further configured to use, based on the first region having the second information amount, a part of the second region that corresponds to a difference between the first information amount and the second information amount.

A communication method of a wireless terminal apparatus that communicates to a base station apparatus with radio communication, the communication method comprising:

• receiving a data packet including control information and communication data;
• and
• controlling wireless communication to the base station apparatus using at least a first identification method and a second identification method,
• wherein:
• the control information included in the data packet includes a first region to identify a terminal apparatus and a second region to control the wireless communication,
• a sum of an amount of information bits of the first region and an amount of information bits of the second region is constant,
• the amount of information bits of the first region is a first information amount or a second information amount,
• the first region is used for one of a first terminal identifier for the first identification method and a second identifier for the second identification method,
• all information bits in the first region are used to identify the terminal apparatus,
• a first communication method uses the first identification method and the first region that has the first information amount,
• a second communication method uses the second identification method and the first region that has the second information amount,
• the first information amount is greater than the second information amount, and
• a part of the second region that corresponds to a difference between the first information amount and the second information amount is used to control the wireless communication to the base station apparatus.

A communication method of a base station apparatus that communicates to a wireless terminal apparatus with radio communication, the communication method comprising:

• transmitting a data packet including control information and communication data;
• assigning a plurality of terminal identifiers to the wireless terminal apparatus;
• and
• controlling wireless communication with the wireless terminal apparatus using at least one of a first identification method and a second identification method,
• wherein:
• the control information included in the data packet includes a first region to identify a terminal apparatus and a second region to control the wireless communication,
• a sum of an amount of information bits of the first region and an amount of information bits of the second region is constant,
• the amount of information bits of the first region is one of a first information amount and a second information amount,
• the first region is used for one of a first terminal identifier for the first identification method and a second terminal identifier for the second identification method,
• all information bits in the first region are used to identify the terminal apparatus,
• a first communication method uses the first identification method and the first region that has the first information amount,
• a second communication method uses the second identification method and the first region that has the second information amount,
• the first information amount is greater than the second information amount, and
• a part of the second region that corresponds to a difference between the first information amount and the second information amount is used to control the wireless communication to the wireless terminal apparatus.