Multi-RU Trigger Frame Allocation for 320 MHz WLAN
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Solution Overview
Problem
Existing WLAN technologies face challenges in efficiently allocating resource units (RUs) within extended bandwidths, particularly in the context of the upcoming 802.11be standard, which supports a 6 GHz unlicensed frequency band and bandwidths up to 320 MHz, to support low latency and ultra-fast transmissions.
Innovation Solution
A method and apparatus for efficiently allocating RUs in a WLAN system by generating subfields and trigger frames to define RUs within a bandwidth, using a transceiver to allocate and transmit PPDUs with specific bit settings for subbands, allowing devices to identify and utilize RUs based on extracted subfields and uplink bandwidth fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the bandwidth is extended to support ultra-fast transmissions in 802.11be standard, then the transmission speed is improved, but the complexity of resource unit allocation increases
Solution Approach 1:
The bandwidth is divided into multiple subbands, and resource units are allocated independently within each subband. This segmentation approach allows the system to manage extended bandwidth (up to 320 MHz) by breaking it into smaller, more manageable units, thereby reducing allocation complexity while maintaining high transmission speed
Solution Approach 2:
The patent introduces a new dimension for resource allocation by using multi-RU allocation across multiple subbands. Instead of allocating resources in a single dimension, the system uses multiple RUs distributed across different subbands, enabling more efficient resource utilization and reduced allocation complexity in extended bandwidth scenarios
2Productivity
If multiple resource units are allocated to support low latency communication, then the productivity is improved, but the device complexity increases
Solution Approach 1:
The system performs preliminary resource unit allocation through trigger frames before actual data transmission. By pre-allocating multiple RUs and notifying users in advance, the system reduces latency without requiring complex real-time allocation mechanisms during transmission
Solution Approach 2:
Trigger frames serve as an intermediary mechanism between the access point and users for resource allocation. The trigger frame carries RU allocation information and notifies multiple users of their allocated resources, simplifying the allocation process while supporting low-latency communication through efficient information dissemination
Data Source
AI summary
A method of communicating, by a first device, with at least one second device in a wireless local area network (WLAN) system includes allocating at least one resource unit (RU) within a bandwidth to a second device; generating at least one subfield defining the at least one RU; generating a trigger frame comprising a user information field comprising the at least one subfield, and transmitting a PPDU including the trigger frame to the at least one second device, wherein the generating comprises setting at least seven bits associated with the at least one RU and setting at least two bits as a value defining a subband that includes the at least one RU when the band width comprises at least four subbands.