Uplink Bandwidth Allocation with Channel Availability Detection
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing bandwidth allocation for multiple user uplink transmissions, leading to increased traffic and reduced throughput due to limited communication resources.
Innovation Solution
A method and apparatus for wireless communication that involves receiving an assignment of frequency bandwidth for uplink transmissions and determining whether a portion of the assigned bandwidth is unavailable, with selective transmission based on availability, ensuring efficient use of bandwidth by avoiding busy channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple terminals send uplink communications to the access point simultaneously, then data throughput increases, but the amount of traffic and interference increases
Solution Approach 1:
The patent segments the uplink transmission process into two distinct phases: a random access phase where terminals compete for channel access, and a scheduled phase where the access point assigns specific time slots and frequency resources to terminals. This segmentation reduces interference by organizing simultaneous transmissions into structured, non-conflicting time-frequency resources.
Solution Approach 2:
The patent implements dynamic resource allocation where the access point adjusts time slot assignments and frequency bandwidth allocations based on real-time channel conditions, terminal buffer status, and traffic demands. This dynamic scheduling optimizes throughput while managing interference by adapting resource distribution to current system state.
2Reliability
If the access point allocates fixed bandwidth to each terminal, then transmission reliability improves, but bandwidth utilization efficiency decreases
Solution Approach 1:
The patent employs dynamic bandwidth allocation where the access point adjusts the frequency bandwidth assigned to each terminal based on channel conditions, traffic priority, and buffer status. Terminals receive guaranteed minimum bandwidth for reliable transmission while being able to utilize additional bandwidth when available, optimizing both reliability and efficiency.
Solution Approach 2:
The patent changes the bandwidth allocation parameter dynamically based on system state. The access point monitors channel quality indicators and adjusts the frequency resources allocated to each terminal, transforming from static to adaptive parameter control to balance reliability and utilization efficiency.
3Object-generated harmful factors
If terminals perform channel assessment before transmission, then interference is reduced, but transmission delay increases
Solution Approach 1:
The patent performs channel assessment in advance during the random access phase before the scheduled uplink transmissions. Terminals contend for channel access and perform clear channel assessment (CCA) before transmitting their data, ensuring the medium is clear before occupying resources, which reduces interference while managing delay through pre-scheduled transmissions.
Data Source
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AI summary
Methods and apparatus for multiple user uplink are provided. In one aspect, method for wireless communication includes receiving an assignment of a frequency bandwidth for an uplink transmission of a station. The method further includes determining whether a portion of the assigned frequency bandwidth is unavailable for the uplink transmission. The method further includes selectively transmitting the uplink transmission based on whether the portion of the assigned frequency bandwidth is unavailable.