ELR-Mark Sequence Layout for Early PPDU Drop Decisions
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Solution Overview
Problem
Wireless communication networks lack efficient mechanisms for conveying information early in a PPDU to facilitate an 'early drop' of the PPDU at unintended receivers, leading to unnecessary power consumption and potential communication inefficiencies.
Innovation Solution
Implementing enhanced long range (ELR) sequence designs, such as ELR-mark sequences, which are associated with specific BSS color values and have low peak-to-average-power ratios (PAPRs), allowing receiving devices to determine whether to parse the PPDU based on matching BSS color values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If receiving devices parse all PPDUs to check for intended content, then communication reliability is improved, but power consumption increases and processing efficiency decreases
Solution Approach 1:
The patent applies preliminary action by placing ELR-mark sequences with BSS color information at the beginning of PPDUs (in the preamble portion). This allows receiving devices to check the BSS color value before fully parsing the PPDU content, enabling early dropping of packets not intended for them and avoiding unnecessary power consumption and processing.
Solution Approach 2:
The patent segments the PPDU structure into distinct portions: an ELR-mark sequence portion containing BSS color information, and the main data payload. This segmentation allows receivers to process only the critical identification portion first, making quick decisions about whether to continue parsing based on BSS color matching.
2Loss of information
If receiving devices parse all PPDUs to ensure no data is missed, then data completeness is improved, but processing efficiency and network throughput decrease
Solution Approach 1:
The ELR-mark sequence with BSS color is processed in advance before the main data payload. Receivers perform preliminary matching of BSS colors to determine relevance, ensuring that only packets with matching BSS colors are fully parsed. This maintains data completeness for intended receivers while improving overall network processing efficiency.
3Loss of information
If ELR sequences are designed with longer lengths to carry more BSS color information, then information capacity is improved, but peak-to-average-power ratio increases
Solution Approach 1:
The patent optimizes the parameters of ELR sequences by selecting specific lengths (96, 104, or 112) that balance information capacity with power efficiency. These parameter choices ensure sufficient capacity to represent BSS color values while maintaining low peak-to-average-power ratios for efficient transmission.
Solution Approach 2:
The patent applies different ELR sequence lengths based on local requirements - using 96-tone sequences for 20 MHz channels, 104-tone sequences for 40 MHz channels, and 112-tone sequences for wider channels. This local adaptation optimizes the balance between information capacity and power consumption for each specific transmission scenario.
Data Source
AI summary
This disclosure provides methods, components, devices and systems for enhanced long range (ELR) mark sequence design. Some aspects more specifically relate to mechanisms according to which devices may support a set of ELR sequences associated with relatively low peak-to-average-power ratios (PAPRs) and usable to convey information that a receiving device may use to determine whether to perform an early drop of a received ELR physical layer (PHY) protocol data unit (PPDU). In some examples, various devices may support a set of ELR sequences with each ELR sequence of the set indicative of a respective basic service set (BSS) color value. In such examples, a quantity of the set of ELR sequences may correspond to a quantity of available BSS color values and a length of each ELR sequence within the set may correspond to a quantity of used tones within a set of ELR symbols.