Multi-RU WLAN Tone Interleaving for Complexity Balance
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Solution Overview
Problem
Existing wireless local area networks (WLANs) face challenges in achieving a balanced tradeoff between system complexity and performance in the interleaving of multiple resource units (RUs), particularly in next-generation IEEE 802.11be standards, where current interleaving schemes for multi-RUs do not optimize spectral usage effectively.
Innovation Solution
Proposed interleaving schemes for combinations of multi-RUs in WLANs, including joint and separate tone interleaving methods, utilize a single or multiple interleavers based on channel state information and clear channel assessment results to optimize the tradeoff between system complexity and performance, applicable to various radio access technologies such as Wi-Fi, Bluetooth, 5G, IoT, and LTE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple RUs are assigned to a single station to improve spectral usage, then spectral efficiency is improved, but system complexity increases due to the need for different interleaving schemes for multi-RUs
Solution Approach 1:
The patent combines multiple RUs into a single multi-RU allocation for a station, merging separate resource units into one unified resource block that can be treated as a single entity for scheduling and transmission purposes, thereby improving spectral efficiency while managing complexity
Solution Approach 2:
The patent creates a universal interleaving scheme that can handle both single-RU and multi-RU allocations uniformly. The same interleaving mechanism is applied regardless of whether one or multiple RUs are allocated, eliminating the need for separate interleaving schemes and reducing system complexity
2Reliability
If different interleaving schemes are implemented for multi-RUs to improve performance, then transmission performance is improved, but system complexity increases
Solution Approach 1:
The patent changes the parameters of the interleaving scheme by introducing a RU indication field that specifies the RU allocation type (single-RU or multi-RU). This parameter change allows the system to adapt the interleaving behavior based on the allocation type while maintaining a unified interleaving structure, balancing performance and complexity
Data Source
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AI summary
Various proposed schemes pertaining to interleaving of combinations of multiple resource units, RUs, in wireless local area networks, WLANs, are described. In one example, data in a service data unit, SDU, is processed (1010). The process data is then transmitted to a receiving entity over at least some of a plurality of resource units, RUs, (1020). The processing of the data involves either: (i) performing tone mapping by using one joint tone interleaver on one or more combinations of multiple RUs of the plurality of RUs within one frequency segment of a predefined bandwidth (1012); or (ii) performing tone mapping by using multiple tone interleavers on the one or more combinations of multiple RUs of the plurality of RUs over multiple frequency segments of the predefined bandwidth (1014).