Downlink Data Scheduling with Power Control Regions
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Solution Overview
Problem
Conventional communication systems face challenges in optimizing downlink resource assignment for data bursts, leading to wasted slots and inefficient resource utilization, particularly in 4G communication systems like IEEE 802.16, due to complex power assignment algorithms and lack of consideration for burst size and null-padded slots.
Innovation Solution
A method and system for scheduling data in a communication system that includes power control regions for boosting, normal, and deboosting data bursts based on Carrier-to-Interference Noise Ratio (CINR), minimizing wasted slots by assigning bursts according to size and optimizing subchannel allocation, thereby improving cell coverage and capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional rectangular resource assignment is used in QoS priority order, then implementation is simple, but slot waste increases and resource utilization efficiency decreases
Solution Approach 1:
The patent segments the downlink resource assignment process into multiple stages: first assigning resources to bursts based on size (large bursts first), then assigning power control regions (boosting, normal, deboosting) to segments within each burst. This segmentation allows flexible adaptation to different burst sizes and CINR conditions, minimizing slot waste while maintaining implementability through structured algorithms.
Solution Approach 2:
The patent introduces dynamic power control regions (boosting, normal, deboosting) that adapt to the CINR conditions of different mobile stations. The power control region is dynamically assigned based on the measured CINR of each MS, allowing the system to optimize resource utilization according to actual channel conditions rather than using fixed rectangular assignments.
2Productivity
If power boosting/deboosting is applied to optimize downlink resource utilization, then channel utilization increases, but the programming problem becomes very complex
Solution Approach 1:
The patent changes the parameter of power control region assignment based on CINR thresholds. Mobile stations are categorized into boosting region (CINR < first threshold), normal region (first threshold ≤ CINR < second threshold), and deboosting region (CINR ≥ second threshold). This parameter-based classification simplifies the complex optimization problem into manageable categories with specific assignment rules.
Solution Approach 2:
The patent performs preliminary classification of mobile stations into different power control regions based on their CINR measurements before actual resource assignment. This preliminary action organizes the complex power optimization problem into structured groups, allowing systematic resource allocation that reduces computational complexity while maintaining optimization benefits.
3Device complexity
If burst assignment does not consider burst size and null-padded slots, then assignment is simplified, but slot waste increases
Solution Approach 1:
Instead of assigning resources in conventional QoS priority order, the patent inverts the approach by first assigning resources based on burst size (largest bursts first) and then considering QoS priorities. This inversion allows the algorithm to accommodate bursts of different sizes more effectively, reducing slot waste while maintaining manageable complexity through the size-based sorting criterion.
Data Source
AI summary
A method for scheduling data in a communication system having a downlink frame structure including power control regions of a boosting region for boosting power of a data burst, a normal region for keeping power of the data burst, and a deboosting region for deboosting power of the data burst.