Wireless Frame Preamble Group ID for Multi-AP Coordination
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Solution Overview
Problem
There is no mechanism for a communication apparatus to recognize group identification information for enabling a plurality of other communication apparatuses to perform coordinated transmission in Multi-AP communication.
Innovation Solution
A communication apparatus is equipped with a processor and memory to process wireless frames that include group identification information, allowing coordinated transmission among multiple APs and STAs by recognizing and processing first wireless frames with a PHY preamble that contains group identification information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Multi-AP coordinated transmission is implemented, then throughput is improved, but there is no mechanism for communication apparatus to recognize group identification information
Solution Approach 1:
The PHY preamble is segmented to include a dedicated multi-AP group identification field. This field is separated from other preamble elements, allowing receiving apparatus to specifically extract and recognize the group identification information without interference from other signal components.
Solution Approach 2:
The multi-AP group identification information acts as an intermediary that enables coordinated transmission. By embedding this identification in the PHY preamble, it serves as a mediator that allows receiving apparatus to recognize which APs belong to the same coordination group, enabling proper coordinated transmission processing.
2Productivity
If multiple APs transmit simultaneously, then data transmission efficiency is improved, but interference between APs increases
Solution Approach 1:
The coordinated transmission mechanism uses feedback through the multi-AP group identification in the PHY preamble. Each AP transmits its group identification, and receiving apparatus uses this information to coordinate reception and provide feedback to the transmitting APs, allowing them to adjust their transmission to minimize interference while maintaining high efficiency.
Data Source
AI summary
A communication apparatus includes at least one memory that stores a set of instructions, and at least one processor that executes the instructions, the instructions, when executed, causing the communication apparatus to perform operations including receiving, from an external apparatus, a first wireless frame whose physical layer (PHY) preamble includes first group identification information for identifying a group for enabling a plurality of other communication apparatuses to perform transmission in a coordinated manner, and processing the first wireless frame.