Uplink Power Control Parameters for Dynamic TDD Interference
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Solution Overview
Problem
In dynamic TDD systems, the traditional fixed configuration of uplink and downlink sub-frames fails to accommodate varying traffic conditions, leading to inefficient resource utilization and increased interference between cells, which limits the flexibility of uplink power control and results in suboptimal transmission performance.
Innovation Solution
Configuring at least two sets of uplink power control parameters for user equipment (UE) by the network-side device, allowing the UE to select the appropriate set based on the sub-frame type or group, thereby adjusting transmit power for different interference conditions in fixed and flexible uplink sub-frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a fixed configuration scheme of uplink and downlink sub-frames is used throughout the TDD network, then inter-cell interference is reduced through synchronization, but resource utilization efficiency deteriorates due to inability to adapt to varying traffic conditions in different cells
Solution Approach 1:
The patent divides the TDD network into different sub-frame configuration groups (first group with configuration 0, second group with configuration 1) and assigns different configuration schemes to different cells or sub-frames. This segmentation allows each cell to select appropriate configuration independently, resolving the contradiction between maintaining synchronization for interference reduction and enabling flexible resource allocation for improved efficiency.
Solution Approach 2:
The patent introduces dynamic selection of uplink power control parameters based on sub-frame configuration groups. The network can dynamically switch between different power control parameter sets (first set for configuration 0, second set for configuration 1) depending on the current sub-frame type, enabling adaptation to varying traffic conditions while maintaining interference coordination through structured configuration groups.
2Productivity
If different configuration schemes of uplink and downlink sub-frames are selected for different cells to adapt to traffic conditions, then resource utilization efficiency is improved, but inter-cell interference increases due to loss of synchronization
Solution Approach 1:
The patent applies different uplink power control parameter sets to different sub-frame configuration groups locally. Cells using configuration 0 use the first power control parameter set, while cells using configuration 1 use the second power control parameter set. This local differentiation allows each cell to optimize for its specific traffic conditions while the overall structured approach maintains interference coordination.
Solution Approach 2:
The patent changes the power control parameters based on the sub-frame configuration group. By adjusting power control parameters (such as target received power levels) according to whether the sub-frame belongs to configuration 0 or configuration 1, the system enables flexible resource utilization while compensating for interference through parameter adaptation.
3Device complexity
If uplink power control parameters are configured uniformly for all sub-frames, then device complexity is reduced, but transmission performance deteriorates due to inability to match transmit power to specific sub-frame conditions
Solution Approach 1:
The patent introduces dynamic selection of power control parameters based on sub-frame configuration groups. The UE determines which power control parameter set to use based on the current sub-frame's configuration group identifier, enabling adaptation to specific sub-frame conditions without requiring complex per-sub-frame configuration. This dynamic approach balances complexity and performance by using a structured selection mechanism rather than uniform or fully custom configuration.
Solution Approach 2:
The network pre-configures multiple power control parameter sets corresponding to different sub-frame configuration groups before actual transmission. The UE stores these parameter sets and selects the appropriate one based on the current sub-frame type. This preliminary configuration reduces real-time complexity while maintaining the ability to adapt to different sub-frame conditions for optimized transmission performance.
Data Source
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AI summary
Disclosed are an uplink power control method, device and system. The method comprises the steps of: a network-side device configuring at least two sets of uplink power control parameters for an uplink signal of user equipment; and notifying the user equipment of each set of configured uplink power control parameters for user equipment to determine the transmitting power of the uplink signal. The technical solution of the present invention is used for flexibly controlling the uplink transmitting power.