Tone Mapping Signaling in Wireless Preambles
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Solution Overview
Problem
In wireless communication protocols, the large size of the preamble field required for tone mapping increases power consumption in portable devices due to increased data transmission and processing needs, especially in multicarrier modulation schemes like OFDMA, where a large number of tone mapping combinations necessitate extensive compute processing.
Innovation Solution
A signaling mechanism that uses a unique value from the tone mapping field to look up resource block allocations in a lookup table, reducing the size of the tone mapping field by associating it with a portion of the tone space, such as a 20 MHz band, rather than the entire channel, facilitating efficient tone mapping and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the preamble field includes complete tone mapping information for the entire channel, then the receiver can accurately map tones to resource blocks, but the preamble size becomes large increasing power consumption and processing load
Solution Approach 1:
The patent divides the tone space into multiple portions (e.g., 20 MHz bands within an 80 MHz channel). Each portion is independently mapped to resource blocks using separate tone mapping fields in the preamble. This segmentation reduces the size of each individual tone mapping field while maintaining complete tone mapping coverage across the entire channel, thereby reducing power consumption without sacrificing mapping accuracy.
2Measurement precision
If the preamble field includes complete tone mapping information for the entire channel, then the receiver can accurately map tones to resource blocks, but the compute processing required to decode the preamble increases
Solution Approach 1:
By segmenting the tone space into smaller portions, the patent reduces the computational complexity of decoding each tone mapping field. The receiver processes multiple smaller tone mapping fields instead of one large field, reducing the overall computational load while maintaining accurate tone-to-resource-block mapping across the complete channel bandwidth.
3Use of energy by moving object
If the tone mapping field is reduced in size by associating it with a portion of the tone space, then power consumption is reduced, but the preamble can only directly map tones in that specific portion
Solution Approach 1:
The patent combines multiple reduced-size tone mapping fields, each covering a specific portion of the tone space (e.g., different 20 MHz bands), to achieve complete coverage of the entire channel. By merging these individual tone mapping fields, the system maintains adaptability and versatility across the full bandwidth while keeping each field small enough to reduce power consumption.
Data Source
AI summary
Disclosed herein are system, method, and computer program product embodiments for providing an efficient way to signal a tone mapping in a wireless communication protocol. Embodiments operate by receiving a frame for a wireless communications protocol. The embodiments extract a unique value from a tone mapping field in a preamble of the frame. The embodiments look up a resource block allocation for a portion of the tone space in a lookup table using the unique value. The embodiments map the tones of the portion of the tone space to one or more resource blocks based at least in part on the determined resource block allocation.