Method of allocating resource for hierarchical cellular system and transmission frame for performing the method

A non-transitory computer readable medium comprising instructions that when executed by a computer, cause the computer to perform a method of allocating a resource for a hierarchical cellular system, the method comprising:

• recognizing a usage rate of a macrocell dedicated resource that a macrocell uses and a usage rate of shared resource that the macrocell and a small cell use;
• controlling the macrocell dedicated resource and the shared resource based on the usage rate of the macrocell dedicated resource and the usage rate of the shared resource;
• and
• allocating the controlled macrocell dedicated resource and the controlled shared resource to the macrocell and the small cell;
• reporting, by the macrocell, a usage plan of the shared resource to the small cell before the macrocell uses the shared resources;
• wherein the controlling of the macrocell dedicated resource and the shared resource comprises decreasing an amount of the shared resource when the macrocell dedicated resource increases, and increasing an amount of the shared resource when the macrocell dedicated resource decreases.

A coordinator for allocating a resource, the coordinator comprising:

• a recognizing unit to recognize a usage rate of a macrocell dedicated resource that a macrocell uses and a usage rate of shared resource that the macrocell and a small cell use;
• a controlling unit to control the macrocell dedicated resource and the shared resource based on the usage rate of the macrocell dedicated resource and the usage rate of the shared resource;
• and
• an allocating unit to allocate the controlled macrocell dedicated resource and the controlled shared resource to the macrocell and the small cell;
• a reporting unit to report a usage plan of the shared resource to the small cell before the macrocell uses the shared resources;
• wherein the controlling of the macrocell dedicated resource and the shared resource comprises decreasing an amount of the shared resource when the macrocell dedicated resource increases, and increasing an amount of the shared resource when the macrocell dedicated resource decreases.

A communication device for performing communication according to a transmission frame in a hierarchical cellular system, wherein the transmission frame comprises a control zone including a control message related to a usage plan of a shared resource, and a given resource is classified into one of a macrocell dedicated resource that a macrocell uses and the shared resource that the macrocell and a small cell use;

• wherein the macrocell reports the usage plan of the shared resource to the small cell using the control message, and the small cell allocates the shared resource to terminals served by the small cell based on the usage plan of the shared resource;
• wherein the transmission frame further comprises an access zone that includes at least one of a sub-frame for data communication of the macrocell and a sub-frame for data communication of the small cell, wherein:
• the at least one sub-frame for the data communication of the macrocell includes MAP information of a resource allocated to the macrocell among the macrocell dedicated resource and the shared resource;
• and
• the at least one sub-frame for the data communication of the small cell includes MAP information of a resource among the shared resource scheduled for the small cell.