Flexible Full Duplex Power Control via Subframe Segmentation
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Solution Overview
Problem
In flexible full duplex networks, existing power control methods fail to effectively manage uplink-downlink cross-timeslot interference, particularly in ultra-dense networks where interference levels between neighboring cells are complex and vary significantly across different subframes, leading to reduced data transmission efficiency.
Innovation Solution
A power control method that configures distinct power control parameters for different target subframe sets on a flexible time-frequency resource, allowing user equipment to adapt transmission power based on the specific interference levels and transmission directions of each subframe set, thereby minimizing cross-timeslot interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If semi-static power control parameters are configured for all subframes, then configuration complexity is reduced, but cross-timeslot interference between neighboring cells increases in flexible full duplex networks
Solution Approach 1:
The patent divides subframes into different sets (first subframe set and second subframe set) based on interference characteristics. Different power control parameters are configured for different subframe sets, allowing targeted interference management. This segmentation resolves the contradiction by maintaining simple unified configuration for subframes with similar interference patterns while applying differentiated parameters only where needed.
Solution Approach 2:
The patent applies different power control parameter configurations to different subframe sets based on their specific interference characteristics. Instead of uniform configuration across all subframes, the system tailors parameters (such as target power, path loss compensation factors) to local interference conditions in each subframe set, thereby reducing cross-timeslot interference where it matters most while maintaining overall system simplicity.
2Object-affected harmful factors
If power control parameters are dynamically adjusted for each subframe, then cross-timeslot interference is reduced, but configuration complexity and signaling overhead increase
Solution Approach 1:
The patent groups subframes with similar interference characteristics into the same subframe set, so that a single power control parameter configuration applies to multiple subframes. This segmentation approach reduces the number of configurations needed compared to per-subframe adjustments, while still achieving interference mitigation through differentiated parameters across sets.
Solution Approach 2:
The patent introduces dynamic subframe set indication signaling that allows the network to flexibly indicate which subframe set applies to each subframe based on current interference conditions. This dynamic aspect enables adaptive interference management without requiring completely new configurations for every subframe, thus balancing performance improvement with configuration complexity.
3Stability of the object's composition
If accumulated mode TPC commands are used, then transmit power changes progressively, but rapid adjustment to different interference levels between flexible and fixed subframes is impossible
Solution Approach 1:
The patent dynamically selects between accumulated mode and absolute mode TPC commands based on the subframe type and interference conditions. For subframes transitioning between different interference environments (flexible to fixed or vice versa), absolute mode commands enable rapid power adjustment. For subframes with stable interference characteristics, accumulated mode maintains power stability. This dynamic selection resolves the contradiction between stability and adjustment speed.
Solution Approach 2:
The patent changes the TPC command mode parameter (accumulated vs. absolute) based on the specific subframe context and interference level requirements. By adjusting this control parameter dynamically, the system can switch between progressive power changes and direct power setting, thereby adapting to different interference scenarios and resolving the trade-off between stability and responsiveness.
4Power
If absolute mode TPC commands are used, then transmit power can be adjusted in larger range, but total adjusted power is relatively low because adjustments cannot be accumulated
Solution Approach 1:
The patent dynamically selects between accumulated mode and absolute mode TPC commands based on the specific subframe context and interference level requirements. By adjusting this control parameter dynamically, the system can switch between progressive power changes and direct power setting, thereby adapting to different interference scenarios and resolving the trade-off between stability and responsiveness.
Solution Approach 2:
The patent divides subframes into different sets and applies different TPC modes to different sets. This allows the system to accumulate power adjustments over multiple subframes within the same set while maintaining the ability to make large single-step adjustments when transitioning between sets with different interference characteristics, thereby achieving both large adjustment range and accumulated power benefits.
Data Source
AI summary
A power control method, a network-side device, and a user equipment (UE), where the power control method includes obtaining, by a network-side device, at least two target subframe sets, and configuring, by the network-side device, power control parameters respectively corresponding to different target subframe sets on a flexible time-frequency resource for UE such that the UE transmits data in subframes in the target subframe sets according to the power control parameters, where the flexible time-frequency resource includes a time domain resource or a frequency domain resource whose transmission direction is configurable.