Multi-Link Parameter Updates Under Adjacent Link Interference
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Solution Overview
Problem
Existing wireless LAN technologies face challenges in defining detailed operations for multi-link operations, particularly when signal interference between adjacent links prevents simultaneous transmission and reception, leading to issues with parameter updates.
Innovation Solution
A method involving the transmission of frames with updated parameters across multiple links, including beacon and probe response frames, to ensure parameter updates are received by devices, even when simultaneous transmission and reception are not possible, using transmission prohibition periods to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multi-link operation is implemented to increase throughput, then communication speed is improved, but signal interference between adjacent links prevents simultaneous transmission and reception
Solution Approach 1:
The system segments communication into multiple links (first link and second link) operating in different frequency bands. By dividing the communication channels and assigning them to different frequency bands, the system can perform simultaneous transmission and reception operations across segmented links without mutual interference, thereby resolving the contradiction between achieving high throughput and avoiding signal interference.
2Reliability
If parameter updates are transmitted on the first link, then parameter synchronization is achieved, but transmission may fail when simultaneous transmission and reception are not possible
Solution Approach 1:
The system introduces a second link as an intermediary channel for parameter updates. When the first link is occupied or simultaneous transmission/reception is not possible, parameter update information is transmitted through the second link which operates in a different frequency band. This intermediary approach ensures reliable parameter synchronization without being blocked by transmission restrictions on the primary communication link.
3Object-affected harmful factors
If transmission prohibition period is set to avoid interference, then signal interference is reduced, but transmission efficiency decreases due to restricted transmission windows
Solution Approach 1:
The system transitions from time-domain conflict resolution to frequency-domain separation. Instead of restricting transmissions to specific time windows (one dimension), the system uses multiple frequency bands (another dimension) to allow simultaneous transmissions. This dimensional shift eliminates the need for transmission prohibition periods while maintaining low interference levels, thereby preserving transmission efficiency.
Data Source
AI summary
A method and device for updating parameters in a communication system supporting multi-link are disclosed. An operation method for a first device comprises: transmitting a first frame to a second device through a first link in a multi-link, the first frame including updated parameters used for a communication operation in the first link; transmitting a second frame to the second device through a second link in the multi-link, the second frame including information indicating that the updated parameters are present; and transmitting a third frame including the updated parameters to the second device through one link in the multi-link.