Persistent TXOP Allocation for Multi-PPDU EHT WLAN Uplink
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Solution Overview
Problem
There is a need for communication apparatuses and methods that provide feasible technical solutions for persistent allocation (PA) in the context of Extremely High Throughput (EHT) WLAN, which supports increased channel bandwidth, spatial streams, and multi-band operation, but existing technologies have not addressed this requirement.
Innovation Solution
The implementation of circuitry in communication apparatuses that generate and transmit signals with user-specific allocations, including a common field and a data field, where the user-specific allocation can be persistent or not, reducing signaling overhead in EHT WLAN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If persistent allocation is implemented in EHT WLAN with increased channel bandwidth and spatial streams, then throughput and capacity increase, but signaling overhead increases
Solution Approach 1:
The resource allocation is divided into persistent allocations (for regular traffic patterns like VOIP) and dynamic allocations (for bursty traffic). This segmentation allows the system to use compact persistent allocation indicators instead of full resource allocation descriptors, reducing signaling overhead while maintaining high throughput for periodic traffic.
Solution Approach 2:
Persistent allocations are pre-configured and announced in advance through persistent allocation information elements. This preliminary action allows receiving stations to prepare resource buffers and timing schedules beforehand, enabling efficient recurring transmissions without repeated full signaling, thus reducing overhead while sustaining high throughput.
2Loss of information
If persistent allocation is implemented for recurring transmissions, then communication overhead is reduced, but flexibility in resource allocation decreases
Solution Approach 1:
The system implements dynamic switching between persistent allocation mode and dynamic allocation mode. Persistent allocations can be activated, modified, or deactivated based on traffic conditions, and stations can request changes to persistent allocation parameters. This dynamic adaptability maintains low overhead for stable traffic while allowing flexibility when traffic patterns change.
Solution Approach 2:
Persistent allocation parameters such as resource unit assignments, spatial stream configurations, and timing intervals can be modified through update signaling. This allows the system to maintain the efficiency of persistent allocation while adapting to changing traffic requirements, balancing overhead reduction with necessary flexibility.
3Productivity
If user-specific allocations are determined to be persistent, then signaling efficiency improves, but complexity in managing persistent allocations increases
Solution Approach 1:
Stations autonomously manage their persistent allocations by monitoring persistent allocation indicators and automatically adjusting their transmission schedules and resource usage. This self-service approach reduces the need for complex centralized management signaling while maintaining signaling efficiency, as each station independently handles its persistent allocation without requiring extensive coordination.
Data Source
AI summary
A first station according to the disclosure includes a receiver that receives, in a transmission opportunity (TXOP), a trigger frame transmitted by a communication apparatus to allocate a part of the TXOP to the first station, and a transmitter that transmits more than one physical layer protocol data unit (PPDU) within the part of the TXOP. A first PPDU is a response to the trigger frame and at least one of the more than one PPDU other than the first PPDU is not a response to the trigger frame. The trigger frame includes a user info field for the first station, which includes a resource unit allocation subfield indicating information of a frequency resource within which the more than one PPDU are transmitted. After the trigger frame is transmitted, no more user info fields for the first station are transmitted within the part of the TXOP.