Relay Link Cooperating Mode for Millimeter Wave QoS
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless local area networks, especially in millimeter wave communications, direct link setups face challenges with multiple paths, attenuation, and interference, which can lead to reduced processing efficiency and unsatisfied Quality of Service (QoS) for streaming multimedia, particularly when line of sight is blocked or obstructed.
Innovation Solution
A method is introduced to establish a relay link in conjunction with a direct link, allowing a source device to select a relay device based on channel status and capability information, and adjust transmission time points to ensure efficient data transmission even when direct links are blocked, using a cooperating mode that enables simultaneous data arrival at the destination via both the source and relay paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a direct link is used between source device and destination device, then transmission speed is improved, but reliability deteriorates when line of sight is blocked
Solution Approach 1:
A relay device is introduced as an intermediary node between the source device and destination device. When the direct link is blocked, the source device transmits data frames to the relay device, which then forwards them to the destination device, ensuring continuous communication without interruption.
Solution Approach 2:
The system dynamically switches between direct link mode and relay link mode based on channel conditions. The source device determines whether to use the direct link or relay link by evaluating channel status information, allowing adaptive response to changing environmental conditions.
2Reliability
If relay link is used to extend communication length, then reliability is improved, but transmission time increases
Solution Approach 1:
Channel status information including timing offset is exchanged and determined in advance before actual data transmission. The source device and relay device pre-establish synchronization parameters, allowing the relay device to forward frames at precisely calculated times to minimize overall transmission delay.
3Productivity
If millimeter wave communication is used to increase data transmission rate, then productivity is improved, but loss of energy increases due to power loss
Solution Approach 1:
The relay device acts as an intermediate amplifier node that receives weak signals from the source device, regenerates them, and forwards them to the destination device. This allows millimeter wave communication to maintain high data rates over extended distances by compensating for power loss through the relay's signal regeneration capability.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention provides a wireless communication method used for transmitting and receiving a relay in a wireless local area network system. The wireless local area network system according to an embodiment of the present invention relates to a wireless communication method of setting a relay link through a relay and setting a transmission time point at which a data frame is transmitted in a source device by recognizing a propagation delay between devices, and the like when an operation mode of the set relay corresponds to a cooperating mode.