Network control device, communication resource allocation method, and communication system

A communication resource allocation method performed by a network control device that generates a slice by dividing a network and allocates communication resources to the slice, the slice being a virtual network, the communication resource allocation method comprising:

• obtaining resource information from a network device included in the network, the resource information including information on a maximum usage rate of communication resources allocated to a previously generated slice in at least one predetermined period;
• determining, upon receiving a request for generating a new slice, whether or not the requested slice can be generated on the basis of the resource information;
• and
• generating a slice requested by the request for generating a new slice when the requested slice can be generated, and allocating communication resources to the generated slice, wherein
• the resource information includes information on a maximum usage rate of communication resources, which are allocated to the previously generated slice, depending on a request delay concerning the slice in the predetermined period.

A communication system comprising:

• a network control device to generate a slice by dividing a network and allocate communication resources to the slice, the slice being a virtual network;
• and
• a network device included in the network, wherein
• the network device includes:
• a first processor;
• and
• a first memory to store a first program which, when executed by the first processor, performs processes of:
• generating resource information including information on a maximum usage rate of communication resources allocated to a previously generated slice in at least one predetermined period,
• the network control device includes:
• a second processor;
• and
• a second memory to store a second program which, when executed by the second processor, performs processes of:
• obtaining and holding the resource information generated;
• and
• determining, upon receiving a request for generating a new slice, whether or not the requested slice can be generated on the basis of the resource information held, wherein
• the first processor generates the resource information including a maximum usage rate of communication resources allocated to the previously generated slice depending on a request delay concerning the slice in the predetermined period.