Wireless Fidelity Indications for Uplink EVM Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing error vector magnitude (EVM) without altering modulation and coding schemes (MCS), leading to inefficiencies in power and processing resource usage.
Innovation Solution
Network nodes and user equipment (UE) can modify EVM by transmitting or receiving instructions to increase or decrease EVM without changing MCS, using single-bit or multi-bit instructions in downlink or uplink control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If EVM is modified by changing MCS, then transmission reliability is improved, but device complexity and processing resources increase
Solution Approach 1:
The patent segments the control mechanism by separating EVM modification from MCS changes. Instead of modifying the entire MCS to adjust EVM, the system uses independent fidelity indication signals (single-bit or multi-bit instructions) that specifically control EVM adjustments. This segmentation allows EVM to be modified without triggering complex MCS reconfiguration procedures, thereby improving transmission reliability while minimizing device complexity.
Solution Approach 2:
The patent changes the control parameter from MCS (which has multiple components including modulation order and coding rate) to a dedicated fidelity indication parameter. By introducing single-bit or multi-bit fidelity instructions that directly control EVM, the system can adjust transmission quality through simple parameter changes rather than complex MCS reconfiguration, resolving the contradiction between reliability improvement and device complexity.
2Reliability
If EVM is modified by changing MCS, then transmission quality is improved, but power consumption increases
Solution Approach 1:
The patent segments the power-consuming operations by separating EVM adjustment from MCS reconfiguration. The fidelity indication mechanism uses minimal-bit signals to control EVM, avoiding the extensive processing and power consumption associated with full MCS changes. This segmentation enables transmission quality improvement while significantly reducing the power overhead of control signal processing.
Solution Approach 2:
The patent employs lightweight, low-cost control signals (single-bit or multi-bit fidelity indications) that consume minimal processing power and energy. These disposable, simple instructions can be quickly processed and discarded after executing their EVM adjustment function, unlike complex MCS configurations that require sustained processing resources and higher power consumption.
3Reliability
If EVM is modified by changing MCS, then error performance is improved, but network overhead increases
Solution Approach 1:
The patent segments the control information by extracting EVM control from the bulky MCS structure. The fidelity indication uses compact single-bit or multi-bit signals that specifically target EVM adjustments, eliminating the need to transmit and process complete MCS reconfiguration data. This segmentation dramatically reduces network overhead while maintaining error performance improvements.
Solution Approach 2:
The patent extracts the EVM control function from the complex MCS framework and places it in a dedicated, minimalistic fidelity indication mechanism. By taking out the essential EVM adjustment capability from the cumbersome MCS structure, the system achieves error performance improvement with minimal network overhead, as only simple fidelity bits need to be transmitted rather than complete MCS parameters.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a modulation and coding scheme (MCS). The UE may receive an instruction to modify fidelity of an uplink transmission. The UE may transmit the uplink transmission using the MCS and using at least one transmission parameter that is selected to increase or decrease an error vector magnitude associated with the uplink transmission. Numerous other aspects are described.