Adaptive Transmission Power Allocation for TV White Space Secondary Services

The patent implements dynamic transmission power allocation by introducing multiple distribution rules (equal distribution, proportional distribution based on acceptable interference power, and proportional distribution based on path loss) that can be adaptively selected. The system dynamically adjusts power allocation strategies based on real-time channel conditions, node locations, and interference requirements, transforming the static power control into a dynamic optimization process that resolves the contradiction between interference reduction and capacity maintenance.

The patent changes the parameter of transmission power allocation by introducing different distribution rules that modify how power is allocated among secondary users. By varying the allocation parameters (equal shares, proportional to acceptable interference, proportional to path loss), the system can optimize the balance between minimizing interference to primary systems and maintaining adequate capacity for secondary services under different operating conditions.

The patent employs parameter changes by implementing multiple power distribution rules that adjust the allocation parameters based on system conditions. The proportional distribution rule based on acceptable interference power allows secondary users closer to primary systems to transmit at lower powers while users farther away can utilize higher powers, thereby improving overall secondary service capacity while respecting interference constraints through parameterized allocation.

The patent applies local quality by differentiating power allocation based on the specific location and channel conditions of each secondary user relative to primary systems. Users experiencing different path losses and interference environments receive customized power allocations, allowing those in favorable conditions to transmit at higher powers for improved capacity while those near primary systems transmit at lower powers to minimize interference.

The patent transforms the static equal distribution approach into a dynamic multi-rule system. The coordinator can select among equal distribution, proportional distribution based on acceptable interference power, and proportional distribution based on path loss depending on real-time conditions. This dynamic selection mechanism maintains operational simplicity through automated rule selection while achieving capacity optimization by adapting to channel conditions.

The patent segments the power allocation problem into multiple distribution rules that can be independently evaluated and selected. By dividing the allocation strategy into distinct rules (equal, proportional to interference acceptance, proportional to path loss), the system maintains the simplicity of equal distribution when appropriate while enabling optimized distribution when channel conditions warrant it, thus resolving the contradiction between simplicity and optimization.

The patent introduces a coordinator as an intermediary that centralizes the complex power allocation calculations and rule selection. The coordinator receives information from secondary users, determines appropriate distribution rules, and allocates powers accordingly. This intermediary approach improves protection of primary system nodes through centralized adaptive control while managing complexity by consolidating decision-making logic in a single entity rather than distributing it across all secondary users.

The patent segments the complex adaptive power control function into distinct modular rules (equal distribution, proportional to acceptable interference power, proportional to path loss). Each rule represents a self-contained algorithm that can be independently evaluated and selected. This segmentation reduces overall complexity by breaking down the adaptive control problem into manageable, pre-defined strategies that the coordinator can select based on current conditions.