Control Channel Power Shaping for Codebook-Based Uplink Signaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face inefficiencies in power usage and error protection for control channel data due to non-uniform message transmissions and varying traffic-to-pilot power ratios, which impact channel estimation accuracy and spectral efficiency.
Innovation Solution
A power control framework that includes a power shaping operation for each codeword in a codebook and a common power control operation for all codewords, coordinated through signaling of first and second information to ensure synchronized power adjustments and meet performance parameters like TPR and UEP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If uniform power control is applied to all codewords in the codebook, then device complexity is reduced, but power savings and channel estimation accuracy deteriorate due to non-uniform message transmission probabilities
Solution Approach 1:
The patent segments the power control operation into two distinct parts: a common power control operation applied uniformly to all codewords, and a power shaping operation applied individually to each codeword based on its transmission probability. This segmentation allows the system to achieve per-codeword power optimization without implementing fully complex individual power control for every possible transmission scenario, thus balancing device complexity with power savings.
Solution Approach 2:
The patent applies local quality by differentiating power control strategies based on codeword-specific characteristics (transmission probability). Instead of uniform power control, the system adjusts power levels locally for each codeword through the power shaping operation, assigning higher power to less probable codewords and lower power to more probable ones, thereby optimizing overall power efficiency.
2Loss of energy
If per-codeword power shaping is implemented, then power savings and channel estimation accuracy improve, but device complexity increases due to additional power shaping operations
Solution Approach 1:
The patent merges the common power control operation and power shaping operation into a unified power control framework. The common power control operation handles baseline power adjustments for all codewords, while the power shaping operation refines this by applying codeword-specific power adjustments. This merging approach consolidates multiple power control functions into a coordinated system that achieves per-codeword optimization without requiring entirely separate control mechanisms for each function.
Solution Approach 2:
The patent applies preliminary action by performing the power shaping operation on codewords before they are transmitted. The system calculates and applies the appropriate power scaling factors to each codeword in advance, based on their transmission probabilities, so that when the codewords are actually transmitted, the power adjustments are already in place. This preliminary processing eliminates the need for real-time complex power control decisions during transmission.
3Loss of energy
If varying traffic-to-pilot power ratios are used for different codewords, then power efficiency improves, but channel estimation accuracy deteriorates due to non-uniform power ratios
Solution Approach 1:
The patent incorporates feedback mechanisms where the receiving device monitors channel conditions and transmission outcomes, and uses this information to adjust power control parameters. The feedback loop allows the system to learn from actual transmission performance and refine future power shaping operations, ensuring that power efficiency improvements do not compromise channel estimation accuracy. This adaptive feedback approach enables continuous optimization of the trade-off between power efficiency and estimation accuracy.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive first information for a power shaping operation. The UE may perform, for a codebook and in accordance with the first information, the power shaping operation for each codeword from a set of codewords included in the codebook. The UE may receive second information for a power control operation. The UE may perform, for the codebook, the power control operation in accordance with the second information, the power control operation being common to all codewords included in the codebook. The UE may transmit, in accordance with the power shaping operation and the power control operation, control channel data that is encoded using the codebook. Numerous other aspects are described.