Wireless LAN Direct Communication via Time-Period Segmentation
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Solution Overview
Problem
Existing wireless local area network (WLAN) standards face challenges in performing multi-link operations due to signal interference between adjacent channels, which hinders simultaneous transmission and reception operations, and there is a need for methods to update parameters for multi-link operations and support direct communication between stations.
Innovation Solution
The method involves an access point transmitting frames to configure communication periods, allowing stations to allocate resources for direct communication frames, and performing these operations without channel access procedures, enabling efficient negotiation and direct communication between stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multi-link operation is performed in wireless LAN system, then communication bandwidth is expanded, but signal interference between adjacent channels occurs
Solution Approach 1:
The patent segments the communication process into different phases: a first communication period for setup and negotiation, and a second communication period for actual data transmission. This temporal segmentation allows the system to manage interference by separating control operations from data operations, enabling multi-link operation while mitigating adjacent channel interference through structured time division.
2Reliability
If traditional channel access procedures are used for distributed access, then transmission control is maintained, but time required for access increases
Solution Approach 1:
The patent applies preliminary action by performing channel setup, negotiation, and resource allocation during the first communication period before actual data transmission begins in the second communication period. This preliminary configuration eliminates the need for repeated channel access procedures during data transmission, significantly reducing the time required for distributed access while maintaining transmission control through the established protocol.
3Productivity
If direct communication between stations is enabled, then communication efficiency is improved, but coordination complexity increases
Solution Approach 1:
The patent introduces the access point as an intermediary that manages the coordination between stations for direct communication. The access point handles the complex negotiation and resource allocation during the first communication period, then enables straightforward data transmission during the second communication period. This intermediary approach improves communication efficiency while managing coordination complexity by centralizing the control functions.
Data Source
AI summary
A method and a device are disclosed for direct communication in a wireless local area network (LAN) system. An operation method of an access point comprises the steps of: transmitting a first frame including time information of a first communication period to a first station in order to configure the first communication period; receiving, from the first station, a second frame that is a response frame to the first frame, and configuring the first communication period; and after receiving the second frame, transmitting a third frame including time information of a second communication period to a second station in order to configure the second communication period within the first communication period.