SC-FDMA Control Data Multiplexing Power Offset
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Solution Overview
Problem
In wireless communication systems, control channels with varying power offsets due to mapping with data channels can experience degraded signal quality, affecting overall system performance, as they do not maintain a consistent quality of service (QoS) when multiplexed.
Innovation Solution
Applying a power offset to control information to maintain a baseline signal quality during transmission with data, ensuring that the control information's signal quality is preserved by adjusting the power based on the bandwidth and modulation and coding scheme (MCS) used for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control channels are variably mapped depending on whether other channels are present, then system resource utilization is improved, but control channel signal quality deteriorates due to varying mapped locations
Solution Approach 1:
The patent applies local quality by making the power offset specific to each control channel's mapped location and configuration. Different power offsets are applied locally to control channels depending on their position within the transmitted waveform and whether they are multiplexed with data, ensuring each control channel receives appropriate power compensation for its specific situation rather than a uniform approach
Solution Approach 2:
The patent changes the power parameter dynamically based on mapping conditions. The power offset applied to control channels is adjusted according to whether data is present and the specific mapping location, transforming the static power allocation into a dynamic parameter that adapts to varying transmission conditions to maintain consistent signal quality
2Productivity
If control information is multiplexed with data, then transmission efficiency is improved, but control information signal quality deteriorates due to power offset variations
Solution Approach 1:
The patent applies local quality by implementing location-specific power offsets for control information within the multiplexed transmission. When control information is multiplexed with data, the system calculates and applies a power offset tailored to that specific control information's position and characteristics, ensuring consistent signal quality regardless of the multiplexing arrangement
Solution Approach 2:
The patent applies preliminary action by pre-calculating the appropriate power offset for control information before multiplexing with data. The system determines the required power compensation in advance based on the mapping configuration and data presence, then applies this offset to ensure the control information maintains its baseline signal quality throughout the multiplexed transmission
Data Source
AI summary
Systems and methodologies are described that facilitate multiplexing of control information and data for common transmission in a localized FDM wireless communication system. Localized FDM transmission of control and data channels can be achieved by, for example, multiplexing control information with data and transmitting the control information and data using resources and transmission schemes specified for transmission of the data. To ensure the reliability of control information multiplexed with data, a power offset can be applied to the control information to provide varying protection levels for the control information based on properties of the data resources into which it is embedded in order to maintain a predetermined signal quality for the control information independent of the data resources.