Dynamic Time Resource Allocation for Cellular Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in dynamically managing inter-cell interference due to static resource allocation techniques, which are not adaptive to changes in user distribution and base station load levels, leading to suboptimal performance, especially at cell edges.
Innovation Solution
A method and apparatus that dynamically allocate time resources by dividing a time period into different intervals, adjusting transmission power levels, and optimizing time resource division vectors based on user terminal distribution and load levels to minimize interference and maximize signal quality and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If FFR technique is used to allocate frequency resources, then inter-cell interference is reduced, but frequency selective gain is limited and spectral efficiency is reduced
Solution Approach 1:
The patent applies dynamics by making the time resource division vector adjustable and adaptive to changing network conditions. The resource allocation is no longer static but dynamically modified based on user distribution and load levels, allowing the system to optimize between interference reduction and spectral efficiency utilization in real-time.
Solution Approach 2:
The patent changes the parameter of time resource allocation by dividing time resources into different intervals with different allocation strategies. By modifying the time resource division vector and adjusting the proportion of time slots allocated to different cells, the system can adaptively balance interference mitigation and spectral efficiency.
2Object-affected harmful factors
If static FFR and FTR techniques are used, then interference coordination is achieved, but adaptability to user distribution changes and load level variations is poor
Solution Approach 1:
The patent implements feedback mechanisms where the resource allocation decision is based on current user distribution and load level information. The system continuously monitors network conditions and adjusts the time resource division vector accordingly, creating a closed-loop control system that adapts to changing conditions.
Solution Approach 2:
The patent transforms the static resource allocation into a dynamic system where the time resource division vector can be adjusted in response to changing user distribution and load levels. This dynamic adaptation allows the system to maintain optimal performance under varying network conditions.
3Object-affected harmful factors
If entire frequency band is allocated to cell edge terminals with large reuse factor, then inter-cell interference is reduced, but frequency use efficiency is limited
Solution Approach 1:
The patent segments time resources into different intervals, with specific time slots allocated for cell edge terminal service. By dividing time resources rather than frequency resources, the system can provide dedicated interference-free time slots to cell edge terminals while allowing other cells to utilize the full frequency band in different time slots, thus maintaining frequency use efficiency.
Solution Approach 2:
The patent transitions from frequency-domain resource allocation to time-domain resource allocation. By introducing the time dimension for resource division, the system can allocate resources to cell edge terminals without restricting frequency band usage, thereby maintaining frequency use efficiency while reducing inter-cell interference through temporal separation.
Data Source
AI summary
A dynamic resource allocating apparatus of a first base station that manages a first cell in a cellular communication system including the first cell and a plurality of cells adjacent to the first cell determines time resource division vector in which one time resource division period is formed of a plurality of time division intervals and calculates time resource division vector for maximizing utilities of user terminals in a set up objective function to update the time resource division vector. Among the plurality of time division intervals, a first time division interval is operated by a time resource reuse coefficient 1 for user terminals positioned in center regions of a first cell and a plurality of adjacent cells, and the remaining time division intervals excluding the first time division interval are operated by a time resource reuse coefficient n for user terminals positioned at edges of the first cell and the plurality of adjacent cells.