Terminal Device Uplink MU-MIMO Control Information Exchange
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing uplink MU-MIMO wireless LAN systems require complex control information exchange to manage data traffic, complicating the network configuration and operation.
Innovation Solution
A terminal device that receives and transmits frames containing uplink multiple access information, determines the need for uplink multiple access communication based on received frames, and secures wireless resources using random back-off processing, thereby simplifying the exchange of control information and reducing network complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink MU-MIMO procedures are implemented using trigger frames as proposed in NPL 1, then temporal synchronization among wireless LAN devices is achieved, but control information exchange becomes complex and network complexity increases
Solution Approach 1:
The patent extracts the trigger frame mechanism from the uplink MU-MIMO procedure, allowing terminal devices to autonomously determine transmission timing based on received frames without requiring complex centralized control. This removes the need for extensive control information exchange while maintaining synchronization.
Solution Approach 2:
Terminal devices autonomously determine their transmission timing by receiving frames from other terminals and independently calculating back-off periods, without requiring the base station to manage or coordinate the synchronization process. This self-service approach reduces control overhead significantly.
2Stability of the object's composition
If centralized control by base station is used to manage uplink multiple access, then coordination is improved, but network complexity and control information overhead increase
Solution Approach 1:
Instead of the base station controlling terminal transmission timing, the patent inverts the control relationship where terminals autonomously determine their own timing based on frames received from other terminals. This inversion eliminates the need for complex base station coordination while maintaining stable network operation.
Solution Approach 2:
The patent combines the functions of transmission scheduling and synchronization into a single autonomous terminal device operation. Terminals that receive uplink multiple access information automatically use it to determine their transmission timing, merging coordination and synchronization functions without requiring separate control mechanisms.
Data Source
AI summary
A method that carries out uplink multiple access while reducing complexity in processing accompanying exchange of control information. A terminal device that performs uplink multiple access communication includes a reception unit that receives a frame including first uplink multiple access information, and a transmission unit that transmits a frame including second uplink multiple access information based on the frame including the first uplink multiple access information, and further, after standby of a predetermined period, initiates the uplink multiple access communication. The reception unit determines whether or not there has been reception of a frame including the second uplink multiple access information that another terminal device has transmitted during the predetermined period, and the transmission unit decides whether or not to initiate the uplink multiple access communication, based on whether or not there has been reception of a frame including the second uplink multiple access information that another terminal device has transmitted during the predetermined period.