Multi-Link Device Link Use Capability and Backoff Control
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Solution Overview
Problem
Current wireless communication systems, particularly those based on the IEEE 802.11 family of standards, face challenges in efficiently managing link use capabilities across multiple links, leading to errors and inefficiencies in data transmission and reception between multi-link devices.
Innovation Solution
The implementation of link use capabilities, such as Link Use Capability 1, 2, and 3, which allow for concurrent transmission and reception on different links, with mechanisms like backoff counters and idle indications to ensure synchronized data exchange, reducing errors and improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link devices transmit and receive data concurrently on multiple links, then communication efficiency and throughput are improved, but errors and transmission conflicts increase
Solution Approach 1:
The patent applies preliminary action by establishing link use capability indications and backoff counter mechanisms before concurrent transmissions occur. The transmitting device determines the link use capability of the receiving device in advance, and backoff counters are controlled beforehand to prevent conflicts, ensuring reliable concurrent communication without transmission errors
Solution Approach 2:
The patent implements feedback through link use capability indications exchanged between transmitting and receiving devices. The receiving device provides feedback about its capability to handle concurrent transmissions, and the transmitting device uses this feedback to adjust its transmission strategy, controlling backoff counters appropriately to maintain both efficiency and reliability
2Reliability
If backoff counters are controlled to prevent transmission conflicts, then transmission reliability is improved, but communication speed and efficiency decrease
Solution Approach 1:
The patent applies dynamics by making backoff counter control adaptive rather than static. The control strategy changes dynamically based on the link use capability of the receiving device - when the receiving device can handle concurrent transmissions, backoff is minimized or eliminated, enabling high-speed communication while maintaining reliability only when necessary
3Productivity
If link use capability mechanisms are implemented, then concurrent transmission and reception are enabled, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the communication protocol into distinct functional components: link use capability indication mechanisms, backoff counter control logic, and concurrent transmission management. This segmentation allows each component to be handled independently, reducing overall device complexity while enabling concurrent communication capabilities
Data Source
AI summary
Examples of wireless communication based on link use capabilities of multi-link devices is disclosed. A first multi-link device receives a first physical layer conformance procedure (PLCP) protocol data unit (PPDU) on a first link from a second multi-link device and transmits a second PPDU on the second link based on a link use capability of the second multi-link device and a backoff counter counting down to a predetermined value. A first multi-link device also transmits a PPDU on the first link and the second link at a same start time based on an link idle determination and the backoff counter counting down to a predetermined value.