Coordinated Access Point Transmissions for Concurrent Uplink
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Solution Overview
Problem
Current wireless communication networks face inefficiencies in medium utilization and congestion due to random channel access mechanisms, where only the owner of a transmission opportunity (TXOP) can transmit or receive data, limiting concurrent transmissions among access points (APs).
Innovation Solution
Implementing a coordinated access point transmission method where a first AP obtains a TXOP and allocates unique frequency bandwidth portions to other APs for concurrent uplink or downlink transmissions, allowing simultaneous data exchange with associated wireless stations across different basic service sets (BSSs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If random channel access mechanisms are used where only the TXOP owner can transmit, then transmission coordination is simplified, but medium utilization efficiency deteriorates due to limited concurrent transmissions
Solution Approach 1:
The frequency bandwidth is segmented into multiple sub-channels, with each sub-channel allocated to a specific AP for concurrent transmissions. The primary AP divides the available spectrum into distinct portions that can be simultaneously used by different APs, thereby increasing overall medium utilization while maintaining organized coordination through structured frequency division.
2Productivity
If only the TXOP owner transmits data, then interference control is simplified, but network throughput deteriorates due to inability to support concurrent transmissions
Solution Approach 1:
Each AP is assigned a specific sub-channel with localized frequency resources dedicated to its transmissions. This local quality assignment ensures that each AP operates independently on its allocated frequency portion, enabling concurrent transmissions while minimizing inter-AP interference through frequency isolation.
3Productivity
If multiple APs transmit concurrently on the same frequency, then medium utilization improves, but interference between transmissions increases
Solution Approach 1:
The system transitions from time-division multiplexing (single AP transmitting at a time) to frequency-division multiplexing (multiple APs transmitting simultaneously on different frequencies). By adding the frequency dimension as a resource allocation axis, the system enables concurrent transmissions while maintaining interference control through orthogonal frequency separation.
Data Source
AI summary
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for adjusting a packet duration for triggered uplink (UL) transmissions to an access point (AP) from one or more stations (STAs). In one aspect, the AP may estimate an amount of data that a STA has queued for UL transmission and select the packet duration based on the estimated amount of queued UL data. The AP may transmit a trigger frame that solicits UL data from the STA and indicates the selected packet duration. In response, the AP may receive an UL packet from the STA and determine an amount of UL data queued in the STA based on the UL packet. In some implementations, the AP may selectively adjust the packet duration for UL transmissions based on the UL packet, the determined amount of UL data queued in the STA, or both.