Sub-band Position Modulation for Power-Limited Wireless Efficiency
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Solution Overview
Problem
Wireless communication devices face inefficiencies in power-limited scenarios where they cannot produce enough transmission power to use full allocated bandwidth, leading to reduced system efficiency due to reduced resource utilization and additional overhead in communicating adaptation information.
Innovation Solution
The implementation of sub-band position modulation (SBPM) techniques, which allow devices to implicitly encode frequency band information, enabling efficient data transmission by selecting and modulating active sub-bands within the allocated bandwidth, reducing the need for control information and enhancing data processing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If narrowband transmission is used to reduce power requirements, then power consumption is reduced, but system efficiency is reduced due to fewer resources being used for data communication
Solution Approach 1:
The patent divides the frequency bandwidth into multiple sub-bands and selectively activates only the necessary number of sub-bands for transmission. This segmentation allows the system to use fewer frequency resources (improving power efficiency) while still maintaining adequate data transmission capacity (preserving system efficiency).
Solution Approach 2:
The patent employs partial action by activating only a subset of available sub-bands rather than using the full bandwidth. This partial utilization of resources reduces power consumption while maintaining sufficient communication capability for the given conditions.
2Power
If narrowband transmission is used to reduce power requirements, then transmission power is reduced, but resource utilization is reduced
Solution Approach 1:
The available frequency bandwidth is segmented into multiple sub-bands, allowing the system to selectively activate only the necessary portion (K sub-bands out of N total sub-bands). This enables reduced power consumption while maintaining adequate resource utilization for data transmission.
Solution Approach 2:
The system dynamically adjusts the number of active sub-bands based on channel conditions and power availability. This dynamic adaptation allows optimal balance between power consumption and resource utilization under varying operational conditions.
3Adaptability or versatility
If adaptation information is communicated to indicate frequency band usage, then frequency band selection is enabled, but overhead is increased
Solution Approach 1:
The system uses self-service by embedding the frequency band selection information directly in the physical layer transmission parameters rather than requiring separate higher-layer signaling. The receiver can autonomously determine the active sub-bands from the physical layer configuration, eliminating the need for additional adaptation information and reducing overhead.
Solution Approach 2:
The patent merges the frequency band selection function with the existing physical layer transmission framework. The sub-band activation patterns are integrated into the resource allocation and modulation schemes already present in the system, combining multiple functions into unified operations and eliminating separate signaling overhead.
Data Source
AI summary
Aspects of the disclosure relate to efficiently exchanging data in power-limited wideband communications. A base station and a UE transmit data using sub-band position modulation (SBPM), in which a select subset of frequency sub-bands carry the data transmission. At a given interval of the streamed data portion, a new subset of the sub-bands may be selected as the active sub-bands, thus modulating the active sub-band positions during the data transmission. A receiver monitors for the data transmission signal and detects the sub-bands on/off state in order to receive the data within the active sub-bands. The entities exchange no control information indicating which sub-bands a given transmission uses. Further, SBPM includes pattern recognition by both devices in order to convey additional information each interval by selecting the positions of the active sub-bands to match the pattern associated with the information to be conveyed.