Multi-RU PPDU Transmission With Size-Based LDPC Tone Mapping
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Solution Overview
Problem
Existing communication technologies lack efficient methods for transmission over combinations of multiple resource units in EHT WLAN, which is necessary for achieving increased spectral efficiency and throughput in next-generation wireless local area networks.
Innovation Solution
A communication apparatus and method that generates and transmits physical layer protocol data units (PPDUs) across combinations of resource units, where the use of a single low-density parity check (LDPC) tone mapper is determined by the size of the resource unit combination, allowing for efficient transmission and improved spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple RUs are assigned to a single communication apparatus in an EHT PPDU, then spectral efficiency and throughput are improved, but the complexity of transmission and reception processing increases
Solution Approach 1:
The patent segments the resource units into different categories (first type and second type) based on their size and characteristics. This segmentation allows the system to apply different processing rules to different RU types, simplifying the overall processing complexity while maintaining the ability to efficiently utilize multiple RUs for improved spectral efficiency
Solution Approach 2:
The patent changes the parameter of RU combination by defining specific rules for combining RUs of the same type versus different types. By establishing clear parameter-based combination rules, the system enables efficient multi-RU transmission without requiring complex dynamic processing, thus improving spectral efficiency while controlling processing complexity
2Productivity
If multiple non-contiguous RUs are assigned to a single communication apparatus, then resource utilization is improved, but the difficulty of detecting and measuring the transmission increases
Solution Approach 1:
The patent applies local quality by assigning different characteristics and processing rules to different types of RUs based on their local properties (contiguous vs. non-contiguous, size, position). This allows the receiver to detect and measure each RU type using appropriate local processing rules, making non-contiguous RU detection manageable while improving overall resource utilization
3Productivity
If the maximum channel bandwidth is increased from 160 MHz to 320 MHz, then throughput capacity is improved, but the device complexity increases
Solution Approach 1:
The patent segments the 320 MHz bandwidth into multiple resource units of different types, allowing the system to manage the large bandwidth through structured segmentation rather than treating it as a single complex resource. This enables high throughput capacity while keeping device complexity manageable through systematic resource organization
Solution Approach 2:
The patent creates a universal RU combination framework that can handle different RU types and configurations within the 320 MHz bandwidth. This multi-functional approach allows the same basic processing architecture to serve multiple RU configurations, achieving high throughput capacity without proportionally increasing device complexity
Data Source
AI summary
The present disclosure provides communication apparatus and communication method for transmission over combinations of multiple resource units. The communication apparatus comprises: circuitry, which, in operation, generates a physical layer protocol data unit (PPDU) comprising a signal field and a data field, the signal field comprising a resource unit (RU) allocation field and one or more user specific field and the data field comprising one or more physical layer service data unit (PSDU); and a transmitter, which, in operation, transmits the generated PPDU, wherein a single PSDU of the one or more PSDU is transmitted over a RU combination, and whether two or more RUs of the RU combination share a single low density parity check tone mapper depends on the size of the two or more RUs of the RU combination.