OFDMA Receiving Device Full Band Channel State Acquisition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In OFDMA systems, the limited acquisition of channel state information within a consecutive frequency band range leads to incomplete resource utilization, resulting in reduced throughput and missed multi-user selection gains due to incomplete channel state information.
Innovation Solution
A method where a receiving end device acquires channel state information from a transmitting end device on multiple non-consecutive sub-carriers, allowing for full band channel state information and effective resource allocation across the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the receiving end device acquires channel state information only within a certain consecutive frequency band range, then the device complexity is reduced, but the system throughput rate is reduced and multi-user selection gain cannot be obtained
Solution Approach 1:
The frequency band is divided into multiple sub-channels, each containing multiple sub-carriers. The receiving end device acquires channel state information on multiple sub-carriers within each sub-channel, and then estimates the channel state information for the entire frequency band by combining information from multiple sub-channels. This segmentation approach enables full band channel state information acquisition while maintaining manageable device complexity through structured processing.
Solution Approach 2:
The patent transitions from acquiring channel state information in a single consecutive frequency band to acquiring information across multiple non-consecutive sub-carriers distributed across the entire frequency band. By utilizing the frequency dimension more effectively and acquiring information at multiple frequency points simultaneously, the system achieves comprehensive channel state knowledge without proportionally increasing complexity.
2Productivity
If the receiving end device acquires channel state information on multiple non-consecutive sub-carriers across the full frequency band, then the system throughput rate increases and multi-user selection gain is achieved, but the device complexity increases
Solution Approach 1:
The frequency band is divided into multiple sub-channels, each containing multiple sub-carriers. The receiving end device acquires channel state information on multiple sub-carriers within each sub-channel, and then estimates the channel state information for the entire frequency band by combining information from multiple sub-channels. This segmentation approach enables full band channel state information acquisition while maintaining manageable device complexity through structured processing.
Solution Approach 2:
The receiving end device performs preliminary channel state information acquisition on multiple sub-carriers within each sub-channel before performing the final estimation for the entire frequency band. By pre-acquiring information at multiple frequency points and organizing it by sub-channel, the device prepares data in advance that facilitates efficient full band channel state estimation, reducing the computational burden during the final allocation stage.
3Adaptability or versatility
If the receiving end device only acquires channel state information within a certain consecutive frequency band range, then the ease of operation is improved, but the resource utilization is incomplete
Solution Approach 1:
The frequency band is divided into multiple sub-channels, each containing multiple sub-carriers. The receiving end device acquires channel state information on multiple sub-carriers within each sub-channel, and then estimates the channel state information for the entire frequency band by combining information from multiple sub-channels. This segmentation approach enables full band channel state information acquisition while maintaining manageable device complexity through structured processing.
Solution Approach 2:
The receiving end device uses the same channel state information acquisition and estimation mechanism across all sub-channels and the entire frequency band. By establishing a universal approach that works consistently across different frequency ranges and sub-channels, the system achieves complete resource utilization while maintaining operational simplicity through standardized procedures.
Data Source
AI summary
Embodiments of the present invention provide a method and a device for accessing a channel. The method includes: receiving a contention request frame transmitted by a first transmitting end device on M sub-carriers, where the M sub-carriers at least have two inconsecutive sub-carriers, and the contention request frame is modulated onto the M sub-carriers; according to the contention request frame, acquiring channel state information about the first transmitting end device respectively on the M sub-carriers, and determining channel state information about the first transmitting end device respectively on N sub-carriers, where the N sub-carriers are obtained by dividing all or a part of a system available frequency band, the N sub-carriers include the M sub-carriers, both N and M are positive integers, N>M and M>1; and performing allocation of a transmission sub-channel according to the channel state information about the first transmitting end device respectively on the N sub-carriers.