Joint Power and Time Allocation in Dynamic TDD Systems
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Solution Overview
Problem
Dynamic Time Division Duplex (TDD) communication systems face significant transmission failures due to inter-cell interference-cross link interference (CLI) caused by misalignment in link direction among neighboring cells, which is exacerbated by the flexibility in time resource allocation.
Innovation Solution
A method for joint allocation of transmission power and time slots in dynamic TDD systems, using an optimal incremental method to determine the minimum required time resource assignment and optimal power allocation, ensuring that traffic demands are met while minimizing average transmission power and inter-cell interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic TDD is used to flexibly allocate time resources for uplink and downlink transmissions, then traffic adaptation capability is improved, but inter-cell interference increases due to misalignment in link direction among neighboring cells
Solution Approach 1:
The patent combines time resource allocation and power allocation into a unified joint optimization framework. By merging these two previously separate allocation processes, the system can simultaneously consider traffic adaptation requirements and interference mitigation, achieving both flexible traffic handling and reduced inter-cell interference through coordinated decision-making
Solution Approach 2:
The patent dynamically adjusts multiple parameters including time slot allocation, transmission power levels, and link direction configuration based on real-time traffic conditions and interference levels. This multi-parameter optimization allows the system to adapt to varying traffic demands while maintaining interference suppression through coordinated parameter adjustments
2Productivity
If transmission power is increased to meet traffic demands, then data rate is improved, but inter-cell interference increases
Solution Approach 1:
The patent optimizes transmission power as a dynamic parameter based on traffic conditions, channel quality, and interference levels. By adjusting power levels adaptively rather than using fixed high power, the system achieves required data rates while minimizing interference generation to other cells
Solution Approach 2:
The patent implements a feedback mechanism where the network device monitors traffic demands, channel conditions, and interference levels, then adjusts power allocation accordingly. This closed-loop control ensures that power is increased only when necessary to meet traffic demands, preventing unnecessary interference
3Productivity
If time resource allocation is made flexible to match traffic dynamics, then system efficiency is improved, but complexity of resource management increases
Solution Approach 1:
The patent merges time resource allocation and power allocation into a single joint optimization process managed by the network device. This consolidation reduces the complexity of managing separate allocation mechanisms while maintaining the flexibility benefits of dynamic resource adjustment
Solution Approach 2:
The patent performs joint optimization of time and power resources in advance based on predicted or reported traffic demands, rather than making separate sequential decisions. This preliminary coordinated allocation simplifies real-time management while achieving efficient resource utilization
Data Source
AI summary
A method, network device and computer readable storage media can provide joint allocation of transmission power and time resource in a dynamic Time Division Duplex (TDD) communication system. In example embodiments, a minimum time resource assignment of uplink and downlink transmissions required by their respective given traffic demands under a given time resource configuration and a given bandwidth configuration is determined for terminal devices served by a network device. An optimal time resource assignment of the uplink and downlink transmissions is determined under the given bandwidth configuration based on the minimum time source assignment by means of an optimal incremental method. An optimal transmission power assignment of the uplink and downlink transmissions is determined based on the optimal time resource assignment. A joint allocation of transmission power and time resource can thus be implemented, which could minimize transmission power over the allocated time resource while meeting given traffic demands.