Multi-Link Occupancy Control for Synchronized Wireless Transmission
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Solution Overview
Problem
Existing communication devices struggle to perform multi-link operations by synchronous transmission due to limited idle times and potential collisions, especially when dealing with legacy terminals that do not support multi-link operations, leading to suboptimal throughput improvements.
Innovation Solution
A communication device and method that control the occupancy periods of multiple links based on transmission suppression information, allowing for synchronized data transmission and reception by setting appropriate transmission suppression periods and signals to align link idle times, even with non-supporting terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronous transmission system is used to align transmission timings between links, then simultaneous transmission and reception between links is avoided and multi-link operation effect is obtained, but the time during which all links can be transmitted in idle state is limited
Solution Approach 1:
The communication device performs preliminary actions by detecting communication end times of legacy systems in advance, suppressing transmissions proactively, and transmitting occupation signals before the NAV expires to secure idle periods for synchronous multi-link operations
Solution Approach 2:
An occupation signal is introduced as an intermediary mechanism to coordinate between legacy terminals and multi-link operation terminals. This signal conveys NAV information to suppress transmissions from other terminals, enabling the securing of idle periods without requiring changes to legacy terminal behavior
2Productivity
If occupation signal is transmitted immediately when NAV expires to avoid collision, then transmission opportunity is maximized, but collision between occupation signals from different communication devices occurs
Solution Approach 1:
The communication device transmits the occupation signal in advance before the NAV expires, rather than waiting until expiration. This preliminary action secures the idle period while avoiding collision with other devices that may also be attempting to transmit at the same moment
Solution Approach 2:
By transmitting the occupation signal before NAV expiration, the device preemptively prevents potential collisions with other occupation signals. The early transmission establishes channel occupancy before competing devices can attempt their own transmissions
3Reliability
If transmission suppression is implemented to secure idle time for synchronous transmission, then all links can be kept idle, but data transmission is delayed even when data is ready to be sent
Solution Approach 1:
The communication device applies different transmission strategies to different links based on their individual states. While one link suppresses transmission to maintain idle state for synchronous operation, other links can transmit data if their idle conditions are met, optimizing overall system performance
Data Source
AI summary
Provided is a communication device that performs multi-link operation by synchronous transmission.A communication device includes a communication unit that performs communication by a first link and a second link, and a control unit that controls a communication operation by the communication unit, in which the control unit sets an occupancy period of the second link on a basis of transmission suppression information of the first link. When a remaining time of a transmission suppression period of the first link is longer than a first threshold, the control unit performs control to set an occupancy period of the second link until the transmission suppression period of the first link ends and transmit a data frame by the second link.