Wireless Resource Unit Allocation via Intermediary Control
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Solution Overview
Problem
Wireless communication networks face challenges in efficiently utilizing resource units due to interference and capacity demands from increasing data transmission requirements, such as video streaming and video teleconferencing, which existing CSMA/CD methods struggle to address effectively.
Innovation Solution
The method involves generating and transmitting frames that assign resource units to devices participating in multi-user transmissions, indicating unavailable units and permitting other devices to use them based on signal strength and interference criteria, thereby optimizing resource utilization across the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If CSMA/CD is used to share the wireless medium, then device simplicity and ease of operation are maintained, but resource unit utilization efficiency deteriorates due to interference and collision detection limitations
Solution Approach 1:
The patent introduces a resource allocation entity (access point or controller) that acts as an intermediary to manage resource unit assignments. This entity receives resource allocation requests, determines available resource units, and sends allocation information to transmitting devices, thereby coordinating access without requiring complex CSMA/CD collision detection while improving resource utilization efficiency through centralized control
Solution Approach 2:
The patent implements preliminary resource unit allocation before actual data transmission. The resource allocation entity determines and assigns resource units in advance based on channel conditions, device capabilities, and traffic requirements, allowing devices to prepare for transmission without waiting for CSMA/CD backoff periods, thus improving overall resource utilization
2Productivity
If resource units are allocated to specific devices for multi-user transmission, then resource allocation efficiency is improved, but device complexity increases due to frame generation and resource tracking requirements
Solution Approach 1:
The patent employs a universal resource allocation frame structure that can serve multiple functions: resource unit assignment, channel quality indication, power control directives, and scheduling information. This multi-functional frame reduces the need for separate control messages and simplifies the overall signaling protocol while maintaining efficient resource allocation
Solution Approach 2:
The patent enables transmitting devices to autonomously determine their allocated resource units and transmission parameters based on received allocation information. Devices self-configure their transmissions using the allocated resource units without requiring continuous controller intervention, reducing control overhead and simplifying device complexity while maintaining allocation efficiency
3Reliability
If unavailable resource units are indicated to prevent interference, then transmission reliability is improved, but information overhead increases due to additional signaling requirements
Solution Approach 1:
The patent indicates availability status only for resource units that are actually unavailable or restricted, rather than providing status information for all resource units. This partial indication approach reduces signaling overhead while still providing sufficient information for reliable transmission by highlighting only the critical unavailable resources that need avoidance
Data Source
AI summary
Disclosed are methods and systems for wireless communication. In one aspect, a method includes generating, by an access point, a frame, the frame assigning first resource units to first devices participating in a multi-user transmission with the access point during a transmission opportunity, and further indicating second resource units available during the transmission opportunity for transmissions to other devices, transmitting the frame; and receiving the multi-user transmission from the first devices according to the resource unit assignments.