Repetition Modulation Bitmaps for Lower-Power 5G Symbol Transmission
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Solution Overview
Problem
Existing wireless communication systems in 3GPP 5G, MTC, and NB-IoT technologies suffer from suboptimal energy and communication performance due to constant bitmaps used in repetitive data transmissions, leading to increased repetitions, transmit power, and reduced data per repetition.
Innovation Solution
Implementing multiple bitmaps for symbol sequences in repetitive transmissions, alternating between different bitmaps for each group of symbol sequences to optimize energy and communication performance by averaging Euclidean distances and reducing repetitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a constant bitmap is used for modulating coded bits across all repetitions, then the modulation process is simple and consistent, but the energy performance and communication performance are suboptimal
Solution Approach 1:
The patent applies dynamics by transitioning from a static constant bitmap to a dynamic bitmap selection mechanism. The system now selects different bitmaps from a codebook based on channel conditions, making the modulation process adaptive to varying transmission environments. This resolves the contradiction by maintaining modulation simplicity through automated selection while improving communication performance through condition-based optimization.
Solution Approach 2:
The patent changes the bitmap parameter dynamically across repetitions instead of keeping it constant. By selecting different bitmaps from a codebook based on channel quality indicators (CQI) or other feedback, the system optimizes modulation parameters for each transmission condition. This resolves the contradiction by improving communication performance through parameter adaptation while maintaining implementation simplicity through standardized selection procedures.
2Reliability
If the same data is transmitted in multiple repetitions with constant bitmap, then data reliability is improved through redundancy, but the number of repetitions required increases
Solution Approach 1:
The patent makes the bitmap dynamic across repetitions, allowing the system to adapt modulation parameters based on channel conditions. This improves transmission efficiency by reducing the number of repetitions needed when channel conditions are good, while still maintaining reliability through selective repetition only when necessary. The dynamic adaptation resolves the contradiction between reliability and productivity.
Solution Approach 2:
The patent changes modulation parameters (bitmap selection) across repetitions based on channel feedback. When channel conditions improve, different bitmaps can achieve better signal-to-noise ratios, reducing the number of repetitions required. This parameter adaptation resolves the contradiction by optimizing the balance between transmission reliability and efficiency based on actual channel conditions.
3Device complexity
If constant bitmap is used across all repetitions, then implementation is simpler, but transmit power per repetition increases
Solution Approach 1:
The patent introduces dynamic bitmap selection based on channel conditions, allowing the system to optimize power efficiency adaptively. When channel conditions are favorable, selected bitmaps can achieve better performance with lower transmit power. The automated selection process maintains implementation simplicity while resolving the power efficiency issue through condition-based optimization.
Solution Approach 2:
The patent changes the bitmap parameter across repetitions to optimize power efficiency. By selecting bitmaps that match current channel conditions, the system reduces the transmit power required per repetition while maintaining the same level of communication reliability. This parameter adaptation resolves the contradiction between implementation simplicity and power efficiency.
4Stability of the object's composition
If constant bitmap is used for modulation, then consistency across repetitions is maintained, but energy performance deteriorates
Solution Approach 1:
The patent transitions from static to dynamic bitmap selection, maintaining consistency through automated selection rules while improving energy performance. The system selects bitmaps based on channel conditions, achieving both consistency in the selection process and optimization in energy efficiency. This resolves the contradiction by making the system adaptively consistent rather than rigidly consistent.
Solution Approach 2:
The patent changes the bitmap parameter dynamically based on channel conditions, improving energy performance while maintaining implementation consistency through standardized selection procedures. The automated selection process ensures consistent behavior across different transmission scenarios while optimizing energy efficiency through condition-based parameter adaptation.
Data Source
AI summary
Disclosed is a method, performed by a transmit node, for transmitting a plurality of groups of symbol sequences comprising a first group of symbol sequences and a second group of symbol sequences. The method comprises obtaining a bit sequence for transmission. The method comprises obtaining, based on the bit sequence, M different coded versions of the bit sequence. The M is a positive integer. The method comprises obtaining the first group of symbol sequences based on modulating the M different coded versions with a first bitmap of a plurality of bitmaps of a modulation scheme. The method comprises obtaining the second group of symbol sequences based on modulating M different coded versions with a second bitmap of the plurality of bitmaps. The second bitmap and the first bitmap are different. The method comprises performing at least one transmissions of the first group of symbol sequences and of the second group of symbol sequences, to a receive node.