Full Duplex Communication Information Exchange in Wireless Systems
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Solution Overview
Problem
Existing wireless communication technologies face challenges in maintaining stable full duplex (FD) communication, particularly when multiple stations (STAs) attempt to transmit and receive data simultaneously, leading to reception failures and lost transmission opportunities.
Innovation Solution
A wireless communication device and method that include transmitting a first signal using a first link and a second signal using a second link, with the second signal containing full duplex (FD) communication information necessary for other wireless communication terminals to perform FD communication using the first link.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an AP transmits FD reception possibility information in a downlink packet to indicate whether reception through FD communication is possible, then other STAs can determine whether to transmit signals to the AP using FD communication, but a reception failure might occur on the AP side because multiple STAs may simultaneously determine they can transmit based on the same information
Solution Approach 1:
The patent applies preliminary action by having the AP transmit FD reception possibility information in advance in downlink packets before actual FD communication occurs. This allows STAs to pre-determine their transmission capabilities based on the AP's reception state, enabling them to prepare for FD communication without causing reception failures during actual data transmission.
Solution Approach 2:
The patent implements feedback mechanisms where the AP continuously transmits FD reception possibility information to STAs, and STAs provide feedback through uplink packets indicating their FD transmission capability. This bidirectional feedback ensures that both the AP and STAs have accurate, real-time information about FD communication possibilities, preventing reception failures by ensuring only compatible pairs attempt simultaneous transmission and reception.
2Productivity
If FD communication is performed using a link shared by an AP MLD and a non-AP MLD that support MLO, then frequency use efficiency is improved, but reception failures occur due to lack of coordinated FD communication information among multiple links
Solution Approach 1:
The patent applies universality by extending the FD communication information exchange mechanism to work across multiple links in MLO (Multi-Link Operation) systems. The same FD reception possibility information and FD transmission possibility information are transmitted and processed across different links, allowing the system to maintain consistent FD communication coordination whether using a single link or multiple links, thereby achieving both high frequency efficiency and reliable communication.
Solution Approach 2:
The patent uses the downlink and uplink packets as intermediaries to carry FD communication information between the AP MLD and non-AP MLD across multiple links. These packets serve as the communication medium that synchronizes FD capability information among all participating entities, ensuring that even in complex MLO scenarios with multiple links, all STAs have accurate information about which FD communications are possible, preventing reception failures while maintaining high frequency utilization.
Data Source
AI summary
The present technology relates to a wireless communication device, a wireless communication terminal, and a wireless communication method capable of smoothly performing full duplex (FD) communication. The wireless communication device transmits a first signal to a wireless communication terminal using a first link and a second signal to the wireless communication terminal using a second link and performs, when transmitting the second signal, control in such a way as to include full duplex (FD) communication information, which is information necessary for another wireless communication terminal to perform FD communication using the first link, in the second signal and transmit the FD communication information. The present technology can be applied to a wireless communication system.