Sidelink MCS and Power Control Dependency Tables
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Solution Overview
Problem
Current wireless communication technologies, such as 5G NR and LTE, face challenges in optimizing sidelink communication by effectively selecting modulation and coding schemes (MCS) and transmission powers, particularly in scenarios with varying interference levels and limited sidelink CSI reporting capabilities.
Innovation Solution
The solution involves configuring dependency tables at user-equipment (UE) to select appropriate MCS and transmission powers based on candidate combinations, with indications from base stations or other UEs, to optimize sidelink channel performance and manage interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If independent selection of MCS and transmission power is used, then flexibility in parameter adjustment is improved, but optimization efficiency and interference management deteriorate
Solution Approach 1:
The patent combines MCS and transmission power selection into a unified framework by configuring dependency tables that link these two parameters. The base station configures the UE with tables containing candidate MCS values and their corresponding transmission power values, enabling coordinated selection rather than independent adjustment. This merging allows the system to maintain flexibility while achieving joint optimization of both parameters simultaneously.
Solution Approach 2:
The base station performs preliminary configuration by pre-computing and configuring dependency tables that contain optimal MCS-power combinations before the UE actually transmits. These tables are prepared in advance based on network conditions and interference levels, allowing the UE to quickly select from pre-optimized combinations rather than performing real-time optimization, thus improving efficiency while maintaining adaptability.
2Device complexity
If traditional power control methods are used, then implementation simplicity is improved, but spectral efficiency and interference management in sidelink communication deteriorate
Solution Approach 1:
The patent changes the parameter representation from traditional separate MCS and power control to a unified MCS-power dependency parameter set. The dependency tables store paired values of MCS and transmission power, allowing the system to switch between different MCS-power combinations based on channel conditions. This parameter transformation enables sophisticated interference management and spectral efficiency optimization while maintaining relatively simple implementation through table-based configuration.
3Ease of operation
If MCS and transmission power are selected without configured dependency, then selection independence is improved, but sidelink communication efficiency and interference control deteriorate
Solution Approach 1:
The patent introduces dependency tables as an intermediary structure between MCS selection and transmission power selection. These tables act as a mediator that provides coordinated pairs of MCS and power values, ensuring that when MCS changes, the transmission power is appropriately adjusted according to the configured dependency. This intermediary mechanism maintains operational simplicity while ensuring reliable and efficient sidelink communication through coordinated parameter selection.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for sidelink communication. A method that may be performed by a user equipment (UE) includes selecting a modulating and coding scheme (MCS) and a transmission power based on a configured dependency between one or more candidate MCSs and one or more candidate transmission powers, and transmitting, via a sidelink channel, one or more frames using the selected MCS and the selected transmission power.