Communication control device, transmission power allocation method and program
There is provided a doing apparatus including a communication control device including a power allocation unit configured to allocate transmission power for secondary use of a frequency channel protected for a primary system to a secondary system. The power allocation unit switches power allocation methods between a first group of secondary systems of which a distance from the primary system is less than a prescribed threshold and a second group of secondary systems of which a distance from the primary system exceeds the prescribed threshold.
1. A communication control device comprising:
a memory storage device to store a program; and
a processing device which upon executing the program from the memory storage device operates as a power allocation unit to perform an allocation process in which transmission power is allocated for secondary use of a frequency channel protected for a primary system to a secondary system,
wherein the power allocation unit switches power allocation methods between a first group of secondary systems of which a distance from the primary system is less than a prescribed threshold and a second group of secondary systems of which a distance from the primary system exceeds the prescribed threshold,
wherein a power allocation method selected for the first group is a method that considers accumulative interferences from a plurality of secondary systems to the primary system, and
wherein a power allocation method selected for the second group is a method that does not consider accumulative interferences from a plurality of secondary systems to the primary system.
2. The communication control device according to claim 1 ,
wherein the power allocation method selected for the second group is a method to allocate, to the secondary system, a larger transmission power value as a path loss from each secondary system to the primary system becomes larger.
3. A communication control device comprising:
a memory storage device to store a program; and
a processing device which upon executing the program from the memory storage device operates as a power allocation unit to perform an allocation process in which transmission power is allocated for secondary use of a frequency channel protected for a primary system to a secondary system,
wherein the power allocation unit switches power allocation methods between a first group of secondary systems of which a distance from the primary system is less than a prescribed threshold and a second group of secondary systems of which a distance from the primary system exceeds the prescribed threshold, and
wherein the power allocation method selected for the first group is a method to distribute transmission power to each secondary system so that a sum of an accumulative interference amount on a same channel from a plurality of secondary systems to the primary system and an accumulative interference amount between channels does not exceed an acceptable interference amount of the primary system.
4. A communication control device comprising:
a memory storage device to store a program; and
a processing device which upon executing the program from the memory storage device operates as a power allocation unit to perform an allocation process in which transmission power is allocated for secondary use of a frequency channel protected for a primary system to a secondary system,
wherein the power allocation unit switches power allocation methods between a first group of secondary systems of which a distance from the primary system is less than a prescribed threshold and a second group of secondary systems of which a distance from the primary system exceeds the prescribed threshold,
wherein a power allocation method selected for the first group is a method that depends on a path loss regarding each secondary system,
wherein a power allocation method selected for the second group is a method that does not depend on a path loss regarding each secondary system, and
wherein the power allocation method selected for the first group is a method to allocate, to the secondary system, a larger transmission power value as a path loss from each secondary system to the primary system becomes larger.