Priority-Based Channel Access for Dense Wireless Uplink Traffic
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Solution Overview
Problem
Existing wireless communication technologies face challenges in efficiently using bandwidths for simultaneous data transmission between multiple terminals and base terminals, particularly in high-density environments, necessitating improved channel access methods.
Innovation Solution
A wireless communication terminal that adjusts channel access parameters based on data priority and multi-user uplink transmission participation, using a processor to switch parameter sets and set timers for enhanced distributed channel access, ensuring efficient channel utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If distributed channel access is used to reduce latency, then real-time service quality is improved, but collision probability increases
Solution Approach 1:
The channel access procedure is segmented into multiple independent phases: sensing phase, backoff counter decrement phase, and transmission phase. Each phase operates independently with specific collision avoidance mechanisms, allowing the system to maintain low latency while reducing overall collision probability through structured progression
Solution Approach 2:
The terminal performs preliminary channel sensing and backoff counter initialization before actual data transmission. The backoff counter is pre-calculated based on priority levels, and the channel is sensed in advance to detect busy states, preventing collisions before they occur and enabling faster transmission when channel conditions permit
2Reliability
If channel sensing is performed continuously to avoid collisions, then collision probability is reduced, but energy consumption increases
Solution Approach 1:
Channel sensing is performed periodically at specific intervals rather than continuously. The terminal senses the channel during designated sensing phases and backoff periods, then enters low-power states during transmission phases when collision risk is managed through priority-based access control, reducing overall energy consumption while maintaining collision avoidance
Solution Approach 2:
The system uses the transmission status information of other terminals to make intelligent sensing decisions. When a terminal detects that high-priority transmissions are occurring, it automatically adjusts its sensing frequency and backoff behavior, allowing the network to self-regulate collision avoidance without requiring continuous active sensing from all devices
3Reliability
If priority-based channel access is implemented for real-time data, then service quality is improved, but fairness to other terminals deteriorates
Solution Approach 1:
Different channel access parameters and sensing requirements are assigned to different data types and priority levels. Real-time data receives aggressive backoff counters and prioritized access windows, while best-effort data uses more conservative parameters. This local differentiation ensures high service quality for time-sensitive traffic while maintaining adequate access opportunities for other traffic types
Solution Approach 2:
The system dynamically adjusts channel access parameters including backoff counter values, sensing intervals, and transmission power based on real-time channel conditions, traffic mix, and queue states. This dynamic adaptation allows the system to optimize service quality for real-time data when needed while automatically improving fairness to other terminals when traffic conditions permit
Data Source
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AI summary
Provided is a wireless communication terminal that communicates wirelessly. The wireless communication terminal includes a transceiver and a processor for processing a radio signal received through the transceiver or a radio signal to be transmitted through the transceiver. The processor accesses a channel according to according to a priority of data to be transmitted to the base communication terminal by the wireless communication terminal.