Base station device, relay station device, communication control methods, and communication control program products

A relay station device being located in a shielded space and relaying a communication between a communication terminal device and a base station device, the relay station device performing a downstream communication with the communication terminal device located in the shielded space concurrently with an upstream communication with the base station device, the relay station device comprising:

• a relay station information storage storing a radio wave shielding ability of the shielded space, the shielded space is defined by a radio wave shielding structure and radio waves from the base station device are attenuated within the shielded space compared with radio waves outside of the shielded space, the relay station device is attached to the radio wave shielding structure such that an upstream antenna of the relay station device performing the upstream communication with the base station device is located outside the radio wave shielding structure and a downstream antenna of the relay station device performing the downstream communication with the communication terminal device is located inside the radio wave shielding structure;
• a connection request instruction unit instructing transmission of the radio wave shielding ability of the shielded space to the base station device;
• a reuse resource acquiring unit acquiring, from the base station device, one or more reuse resources satisfying a reuse requirement, the one or more reuse resources being specified from one or more resources that have been allocated for a communication between the relay station device and the base station device or a communication between another relay station device and the base station device when radio wave shielding abilities of the one or more reuse resources satisfy the reuse requirement;
• and
• a reuse resource allocation unit allocating the one or more reuse resources to a communication between the relay station device and the communication terminal device,
• wherein the reuse requirement indicates a requirement for the one or more resources that can be reused in the downstream communication between the relay station device and the communication terminal device.

A communication control method of a base station device that communicates with a communication terminal device via a relay station device, the relay station device being located in a shielded space and performing a downstream communication with the communication terminal device located in the shielded space concurrently with an upstream communication with the base station device, the communication control method comprising:

• allocating one or more resources to be used in a communication between the relay station device and the base station device or a communication between another relay station device and the base station device;
• storing a reuse requirement, which is set based on a radio wave shielding ability of the shielded space, the reuse requirement indicating a requirement for the one or more resources that can be reused in the downstream communication between the relay station device and the communication terminal device;
• acquiring information of the relay station device, which includes the radio wave shielding ability of the shielded space;
• specifying, from the allocated one or more resources, one or more reuse resources that are reusable for a communication between the relay station device and the communication terminal device when radio wave shielding abilities of the one or more reuse resources satisfy a reuse requirement, the reuse requirement being set with reference to a radio wave shielding ability of the shielded space and indicating a requirement for the one or more resources that can be reused in the downstream communication between the relay station device and the communication terminal device, the shielded space is defined by a radio wave shielding structure and radio waves from the base station device are attenuated within the shielded space compared with radio waves outside of the shielded space, the relay station device is attached to the radio wave shielding structure such that an upstream antenna of the relay station device performing the upstream communication with the base station device is located outside the radio wave shielding structure and a downstream antenna of the relay station device performing the downstream communication with the communication terminal device is located inside the radio wave shielding structure;
• and
• transmitting the specified one or more reuse resources from the base station device to the relay station device.

A communication control program product stored in a computer-readable non-transitory storage medium of a base station device that communicates with a communication terminal device via a relay station device, the relay station device being located in a shielded space and performing a downstream communication with the communication terminal device located in the shielded space concurrently with an upstream communication with the base station device, the communication control program comprising instructions to be executed by a processor of the base station device and the instructions comprising:

• allocating one or more resources to be used in a communication between the relay station device and the base station device or a communication between another relay station device and the base station device;
• storing a reuse requirement, which is set based on a radio wave shielding ability of the shielded space, the reuse requirement indicating a requirement for the one or more resources that can be reused in the downstream communication between the relay station device and the communication terminal device;
• acquiring information of the relay station device, which includes the radio wave shielding ability of the shielded space;
• specifying, from the allocated one or more resources, one or more reuse resources that are reusable for a communication between the relay station device and the communication terminal device when radio wave shielding abilities of the one or more reuse resources satisfy a reuse requirement, the reuse requirement being set with reference to a radio wave shielding ability of the shielded space and indicating a requirement for the one or more resources that can be reused in the downstream communication between the relay station device and the communication terminal device, the shielded space is defined by a radio wave shielding structure and radio waves from the base station device are attenuated within the shielded space compared with radio waves outside of the shielded space, the relay station device is attached to the radio wave shielding structure such that an upstream antenna of the relay station device performing the upstream communication with the base station device is located outside the radio wave shielding structure and a downstream antenna of the relay station device performing the downstream communication with the communication terminal device is located inside the radio wave shielding structure;
• and
• transmitting the specified one or more reuse resources from the base station device to the relay station device.

A communication control method of a relay station device, the relay station device being located in a shielded space and performing a downstream communication with a communication terminal device located in the shielded space concurrently with an upstream communication with a base station device, the communication control method comprising:

• transmitting a radio wave shielding ability of the shielded space to the base station device;
• acquiring, from the base station device, one or more reuse resources that satisfy a reuse requirement, the shielded space is defined by a radio wave shielding structure and radio waves from the base station device are attenuated within the shielded space compared with radio waves outside of the shielded space, the relay station device is attached to the radio wave shielding structure such that an upstream antenna of the relay station device performing the upstream communication with the base station device is located outside the radio wave shielding structure and a downstream antenna of the relay station device performing the downstream communication with the communication terminal device is located inside the radio wave shielding structure, the one or more reuse resources being specified from one or more resources that have been allocated for a communication between the relay station device and the base station device or a communication between another relay station device and the base station device when radio wave shielding abilities of the one or more reuse resources satisfy the reuse requirement;
• and
• allocating the one or more reuse resources to a communication between the relay station device and the communication terminal device,
• wherein the reuse requirement indicates a requirement for the one or more resources that can be reused in the downstream communication between the relay station device and the communication terminal device.

A communication control program stored in a computer-readable non-transitory storage medium of a relay station device, which is located in a shielded space and performs a downstream communication with a communication terminal device located in the shielded space concurrently with an upstream communication with a base station device, the communication control program comprising instructions to be executed by a processor of the relay station device and the instructions comprising:

• transmitting a radio wave shielding ability of the shielded space to the base station device;
• acquiring, from the base station device, one or more reuse resources that satisfy a reuse requirement, the shielded space is defined by a radio wave shielding structure and radio waves from the base station device are attenuated within the shielded space compared with radio waves outside of the shielded space, the relay station device is attached to the radio wave shielding structure such that an upstream antenna of the relay station device performing the upstream communication with the base station device is located outside the radio wave shielding structure and a downstream antenna of the relay station device performing the downstream communication with the communication terminal device is located inside the radio wave shielding structure, the one or more reuse resources being specified from one or more resources that have been allocated for a communication between the relay station device and the base station device or a communication between another relay station device and the base station device when radio wave shielding abilities of the one or more reuse resources satisfy the reuse requirement;
• and
• allocating the one or more reuse resources to a communication between the relay station device and the communication terminal device,
• wherein the reuse requirement indicates a requirement for the one or more resources that can be reused in the downstream communication between the relay station device and the communication terminal device.