NAV Handling in Multi-AP Wireless Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In multi-access point transmission within wireless local area networks (WLANs), communication nodes fail to normally participate due to incorrect setting of the network allocation vector (NAV), leading to affected transmission processes and reduced system throughput.
Innovation Solution
The proposed solution involves a transmission method and apparatus for a wireless network, where a first communication node receives a physical-layer protocol data unit (PPDU) carrying identifier information, and either keeps its locally stored NAV unchanged or updates it while ignoring the NAV during multi-access point transmission, allowing instant participation in transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a communication node sets a NAV according to a relevant mechanism as a participant in multi-access point transmission, then collision avoidance is improved, but the communication node fails to normally participate in multi-access point transmission
Solution Approach 1:
The patent applies local quality by differentiating the NAV setting behavior based on the communication node's role. Trigger entities set NAV according to the data packet to avoid collisions, while triggered nodes (participants in multi-AP transmission) ignore the NAV and set it to zero to enable immediate transmission. This localized differentiation of NAV setting rules resolves the contradiction between collision avoidance and transmission participation.
2Reliability
If listening stations set NAV according to information in the data packet, then collision avoidance is improved, but system throughput is reduced due to waiting periods
Solution Approach 1:
The patent implements local quality by applying different NAV setting rules to different types of listening stations. Trigger entities set NAV based on the data packet duration to prevent collisions, while triggered nodes (which need to participate in multi-AP transmission) set NAV to zero immediately. This selective approach allows the system to maintain collision avoidance for general traffic while eliminating unnecessary waiting periods for transmission participants, thereby resolving the time loss issue.
Data Source
AI summary
A transmission method and apparatus for a wireless network, a communication node and a non-transitory computer-readable storage medium are disclosed. The transmission method for a wireless network may include: receiving a physical-layer protocol data unit (PPDU) which carries first identifier information; and keeping a locally stored network allocation vector (NAV) unchanged, or updating the locally stored NAV and ignoring the updated NAV in a process of multi-access point transmission.