Wireless Node Power Control for Flexible Duplex Interference Limits
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Solution Overview
Problem
The existing NR system suffers from reduced resource utilization and longer delays due to static division of spectrum resources into FDD and TDD, which limits the flexibility of duplex modes and increases interference, particularly in Half Duplex Mode.
Innovation Solution
A method for wireless communications that adjusts transmit power and power control mechanisms based on Flexible Duplex Mode, considering interference and SINR environments to optimize link performance and resource utilization, including support for variable link directions and flexible slot formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Half Duplex Mode is used in TDD spectrum, then self-interference is avoided and cross link interference is reduced, but resource utilization ratio is reduced and delay is increased
Solution Approach 1:
The patent applies dynamics by enabling dynamic switch between half-duplex mode and flexible duplex mode based on traffic conditions and interference levels. The system can transition from static half-duplex operation to dynamic flexible duplex operation, allowing simultaneous uplink and downlink transmissions in different time resources, thereby improving resource utilization while maintaining interference management capabilities
Solution Approach 2:
The patent changes the operational parameter from fixed half-duplex mode to flexible duplex mode with variable link directions. By adjusting the duplex mode parameter and enabling configurable uplink/downlink assignments, the system optimizes resource utilization ratio while controlling interference through parameter adaptation rather than fixed operation
2Reliability
If Half Duplex Mode is used in TDD spectrum, then self-interference is avoided and cross link interference is reduced, but delay is increased
Solution Approach 1:
The system dynamically switches between half-duplex and flexible duplex modes based on real-time traffic conditions and interference measurements. When traffic demands allow, flexible duplex mode enables simultaneous uplink and downlink transmissions, reducing transmission delay while maintaining interference control through dynamic resource allocation
Solution Approach 2:
Flexible duplex mode enables continuous useful action by allowing overlapping uplink and downlink transmissions in different time resources within the same slot, eliminating idle waiting periods present in half-duplex mode. This continuous transmission capability reduces overall delay while maintaining interference management through coordinated scheduling
3Productivity
If Flexible Duplex Mode is implemented, then resource utilization is improved, but interference management complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the base station monitors interference levels and transmission conditions, then adjusts the duplex mode and resource allocation accordingly. This closed-loop feedback enables the system to manage interference complexity through adaptive control, transitioning between half-duplex and flexible duplex modes based on real-time conditions
Solution Approach 2:
The system uses dynamic resource allocation and configurable link direction settings to manage interference complexity. By enabling flexible uplink/downlink assignments and adaptive switching between duplex modes, the system handles interference management through dynamic coordination rather than static complex structures
Data Source
AI summary
A node receives a first information block comprising configuration information of a target sub-band and a first signaling determining a target time-frequency resource set; and transmits a target signal with a target Tx power; the target Tx power is equal to a smaller value between a first Tx power and a target power upper limit, and the target time-frequency resource set determines a first parameter value which the first Tx power is linear with; a power class of the node determines a second parameter value, the second parameter value determining a value range of the target power upper limit; a relation between the target time-frequency resource set and the target sub-band or the configuration information is used to determine at least one of the value range of the target power upper limit or the first Tx power. Link performance is ensured.