Wireless Terminal Notification Frame for OFDMA Channel Assignment
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Solution Overview
Problem
Existing OFDMA communication methods face challenges in efficiently notifying multiple wireless terminals of channel assignments, leading to increased overhead and potential differences between channel situations at assignment and communication start, which can result in suboptimal communication quality.
Innovation Solution
The proposed solution involves an access point transmitting a notification frame that includes information about the assigned channels for each selected wireless terminal, allowing them to configure their communication settings efficiently and reducing the time before OFDMA communication starts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If frames are transmitted independently to each selected wireless terminal to notify assigned channels, then channel assignment notification is achieved, but overhead increases and time period before OFDMA communication starts becomes long
Solution Approach 1:
The patent combines multiple individual frame transmissions into a single notification frame that contains channel assignment information for multiple wireless terminals. This merging approach reduces the total number of transmissions required, thereby decreasing overhead and shortening the time period before OFDMA communication can commence.
Solution Approach 2:
The notification frame is segmented to include distinct channel assignment information for each selected wireless terminal within a single frame structure. This allows efficient organization and transmission of multiple assignments simultaneously, resolving the contradiction between complete notification and time efficiency.
2Loss of information
If frames are transmitted independently to each selected wireless terminal to notify assigned channels, then channel assignment notification is achieved, but overhead increases
Solution Approach 1:
Multiple individual notification frames are merged into a single composite notification frame that serves all selected wireless terminals. This consolidation reduces the total quantity of transmission overhead while ensuring complete channel assignment notification is delivered to all terminals.
Solution Approach 2:
The notification frame is designed with universal structure that can accommodate channel assignment information for multiple wireless terminals simultaneously. This multi-functional frame design eliminates the need for separate dedicated frames for each terminal, thereby reducing overall overhead.
3Loss of time
If channel assignment is performed early, then notification to wireless terminals is achieved, but difference becomes large between channel situation at assignment and at communication start
Solution Approach 1:
The notification frame transmits channel assignment information in advance to wireless terminals, allowing them to configure their communication settings beforehand. This preliminary action ensures terminals are prepared for OFDMA communication while maintaining channel situation consistency through efficient processing.
Solution Approach 2:
The system incorporates feedback mechanisms where wireless terminals acknowledge receipt of channel assignment information in the notification frame. This feedback ensures reliable delivery and allows the access point to verify that channel assignments are properly received before initiating OFDMA communication, maintaining consistency between assignment and execution.
Data Source
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Figure 3
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AI summary
[Problem] An object of the embodiments of the present invention is to efficiently perform the notification to a plurality of wireless terminal [Means for solving the problem] According to one embodiment, a wireless communication device includes a transmitter configured to transmit a frame including first information, the first information including information to designate a plurality of wireless communication devices and information concerning resource blocks which have been assigned to the plurality of wireless communication devices for multiplexing communication.