Network Access Node MCS Adaptation for SBFD Interference
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Solution Overview
Problem
Existing communication systems face sub-optimal resource utilization due to differing interference patterns in sub-band full duplex (SBFD) slots compared to non-SBFD slots, leading to inefficient use of modulation and coding schemes (MCS) despite power control mechanisms.
Innovation Solution
Implement independent link adaptation parameter values, specifically modulation and coding schemes (MCS), for SBFD and non-SBFD slots based on adjusted signal-to-interference and noise ratio (SINR) using offset values calculated from acknowledgment and negative acknowledgment information, to optimize resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If independent link adaptation parameter values are implemented for SBFD and non-SBFD slots, then resource efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the link adaptation process by maintaining separate offset values (first offset value for SBFD slots, second offset value for non-SBFD slots) and separate MCS determination processes for different slot types. This segmentation allows independent optimization of resource efficiency for each slot type while managing complexity through structured separation.
Solution Approach 2:
The patent applies local quality by using different link adaptation parameters (different offset values and MCS schemes) for different locations in the time domain (SBFD versus non-SBFD slots). This enables tailored optimization for each slot type's specific interference characteristics, improving overall resource efficiency without requiring complete system redesign.
2Object-affected harmful factors
If power control mechanisms are used, then interference is reduced, but resource utilization becomes sub-optimal
Solution Approach 1:
The patent changes the link adaptation parameters by introducing separate offset values (first and second offset values) that are specifically calculated based on acknowledgment information from different slot types. This parameter differentiation enables the system to adapt MCS selection to the specific interference conditions of SBFD versus non-SBFD slots, optimizing resource utilization while maintaining interference control.
Solution Approach 2:
The patent implements dynamic adaptation by calculating offset values dynamically based on real-time acknowledgment and negative acknowledgment information received from user equipment. This dynamic approach allows the system to adjust link adaptation parameters according to actual channel conditions and interference levels, improving resource utilization beyond static power control mechanisms.
Data Source
AI summary
There is provided a method, computer program, and apparatus for causing a network access node to perform: calculating a first offset value based on first acknowledgment and negative acknowledgement information for signals received during subband full duplex, SBFD, slots; calculating a second offset value based on second acknowledgement and negative acknowledgment information for signals received during uplink-only slots or during downlink-only slots; and using the first and second offset values to determine respective first and second modulation and coding schemes, MCS, to be used for transmissions made in a subband full duplex, SBFD, slots and either uplink-only slots or downlink-only slots.