Distributed Antenna Port Primary Channel Allocation in Wireless LAN
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Solution Overview
Problem
Existing wireless LAN systems face challenges in efficiently transmitting and receiving Physical Protocol Data Units (PPDUs) due to limitations in channel configuration and management, particularly in Distributed Antenna Systems (DAS) where multiple antenna ports are distributed.
Innovation Solution
The proposed solution involves configuring a primary channel for each antenna port in a DAS and adding an additional 20 MHz channel, allowing for efficient transmission and reception of PPDUs by identifying idle channels across multiple antenna ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single primary channel is used for all antenna ports in DAS, then channel configuration is simple, but channel utilization efficiency is low and throughput is limited
Solution Approach 1:
The patent divides the single primary channel into multiple primary channels, with each antenna port in the DAS being assigned its own dedicated primary channel. This segmentation allows each antenna port to independently manage its channel, improving channel utilization efficiency and throughput while maintaining manageable complexity through standardized assignment rules.
Solution Approach 2:
The patent transitions from a single-channel configuration to a multi-channel configuration by adding the dimension of channel multiplicity. Each antenna port operates on its own primary channel, effectively adding a channel dimension to the system architecture, which enables parallel transmissions and improves overall throughput.
2Productivity
If additional primary channels are configured for each antenna port, then channel utilization efficiency improves and throughput increases, but channel management complexity increases
Solution Approach 1:
The patent applies local quality by assigning dedicated primary channels to specific antenna ports based on their individual characteristics and transmission requirements. Each antenna port receives a primary channel optimized for its local conditions, improving channel utilization efficiency while managing complexity through localized rather than centralized channel management.
Solution Approach 2:
The patent incorporates feedback mechanisms where the transmitting STA senses the status of primary channels and adjusts channel assignments accordingly. This feedback loop allows the system to dynamically optimize channel utilization while managing complexity through automated sensing and adaptation rather than manual configuration.
3Length of stationary object
If multiple primary channels are used across distributed antenna ports, then transmission distance is extended, but channel sensing and allocation complexity increases
Solution Approach 1:
The patent applies preliminary action by having the transmitting STA perform channel sensing before PPDU transmission to determine which primary channels are idle. This advance sensing allows the system to pre-determine optimal transmission paths, extending transmission distance while managing complexity through proactive rather than reactive channel selection.
Solution Approach 2:
The patent implements self-service by enabling each antenna port to autonomously manage its assigned primary channel based on local idle status detection. The transmitting STA independently senses and selects appropriate channels without requiring complex centralized coordination, thereby extending transmission distance while reducing overall system complexity through distributed self-management.
Data Source
AI summary
Proposed are a method and device for transmitting and receiving a PPDU in a wireless LAN system by setting a primary channel for each distributed antenna port in a DAS. Specifically, a reception STA acquires control information from a transmission STA. The reception STA receives allocation information about a first or second primary 20 MHz channel at a plurality of antenna ports. The reception STA receives the PPDU from the transmission STA on the basis of the allocation information. The transmission STA operates in a system in which the plurality of antenna ports are distributed. The first primary 20 MHz channel is a primary 20 MHz channel that is present in a single BSS. The second primary 20 MHz channel is an additional primary 20 MHz channel for each of the plurality of antenna ports.