Address Translation for Multi-Link WLAN Operations
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Solution Overview
Problem
Current wireless communication systems face challenges in managing multi-link operations efficiently, particularly in address translation during uplink and downlink frame forwarding, which affects throughput, reliability, and redundancy across multiple communication links.
Innovation Solution
The implementation of address translation mechanisms by access points (APs) that convert between 3-address and 4-address formats for frames, using link MAC addresses and network MAC addresses, allows for seamless communication across multiple links, ensuring that only APs with direct links utilize specific addresses while other devices use a single network MAC address for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple link MAC addresses are used for multi-link operation, then communication reliability and redundancy are improved, but address management complexity increases
Solution Approach 1:
The patent segments the address management function by introducing two distinct address types: link MAC addresses for individual communication links and a network MAC address for overall station identification. This segmentation allows each link to be managed independently with its own address while maintaining a unified view at the network level, thereby improving reliability through multi-link operation without proportionally increasing management complexity.
Solution Approach 2:
The access point acts as an intermediary that performs address translation between link MAC addresses and the network MAC address. When frames are forwarded between links, the AP automatically translates addresses using its forwarding table, shielding other stations from the complexity of multi-link address management while enabling reliable multi-link communication.
2Productivity
If address translation is performed for frame forwarding, then throughput is improved, but processing overhead increases
Solution Approach 1:
The access point performs preliminary actions by pre-establishing a forwarding table that maps link MAC addresses to the network MAC address before actual data transmission. This pre-computation of address mappings allows the AP to perform rapid address translation during frame forwarding without significant processing overhead, thereby improving throughput while minimizing time loss.
3Speed
If link MAC addresses are used for direct link communication, then communication efficiency is improved, but network-wide address compatibility deteriorates
Solution Approach 1:
The patent applies local quality by allowing link MAC addresses to be used exclusively for direct link communication between the station and access point, where they provide efficient identification. Meanwhile, the network MAC address maintains network-wide compatibility for communication between any stations in the network. The access point translates between these address types as needed, enabling each address type to optimize for its specific context without compromising overall network functionality.
Data Source
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AI summary
This disclosure provides methods, devices and systems for wireless communication, and particularly for address translation during multi-link operation in a wireless local area network (WLAN). The method may include establishing one or more wireless communication links with a station (STA) including a first wireless communication link. The method may include receiving, via the first wireless communication link, a first frame including a first address field that includes a first link media access control (MAC) address associated with the STA. The method may include determining that the STA is associated with a first network MAC address. The method may include removing the first link MAC address from the first address field of the first frame, and inserting the first network MAC address of the STA in a second address field of the first frame. The method may include transmitting the first frame to a first local area network (LAN) device.