Integrated circuit, apparatus and method for communication using resource block groups

A communication apparatus, comprising:

• a receiver, which, in operation, receives resource allocation control information relating to a number of clusters allocated to the communication apparatus, wherein the clusters are frequency resources located on different positions on a frequency axis, and each cluster includes one or more resource block groups of a resource block group size wherein the resource block group size is a number of resource blocks included in one resource block group;
• and
• circuitry, which is coupled to the receiver and which, in operation, based on the number of clusters and a system bandwidth, determines the resource block group size.

A method implemented by a communication apparatus, the method comprising:

• receiving resource allocation control information relating to a number of clusters allocated to the communication apparatus, wherein the clusters are frequency resources located on different positions on a frequency axis, and each cluster includes one or more resource block groups of a resource block group size wherein the resource block group size is a number of resource blocks included in one resource block group;
• and
• based on the number of clusters and a system bandwidth, determining the resource block group size.