Uplink Resource Allocation via Trigger-Contention Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink transmissions from multiple stations to an access point, particularly in reducing traffic and optimizing resource allocation to minimize congestion and interference.
Innovation Solution
A method and apparatus that utilize a trigger message to allocate wireless transmission resources to multiple stations, where the allocation is determined through a contention procedure, including pruning threshold values, backoff counters, and listening periods, to selectively transmit data based on resource availability and collision avoidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple stations transmit uplink data simultaneously using contention-based access, then resource utilization improves, but collision probability increases
Solution Approach 1:
The patent applies preliminary action by implementing a listening period before actual data transmission, where stations first check if the channel is idle. This preliminary check prevents collisions by ensuring only one station transmits at a time, resolving the contradiction between resource utilization and collision probability
Solution Approach 2:
The patent implements periodic action through structured transmission phases including listening periods, contention periods, and data transmission periods. This periodic structure organizes random access into controlled intervals, maintaining resource utilization while reducing collision probability through temporal separation
2Productivity
If contention-based radio resources are allocated to multiple terminals, then bandwidth efficiency improves, but traffic congestion worsens
Solution Approach 1:
The patent segments the uplink transmission process into distinct phases: listening period, contention period, and data transmission period. This segmentation divides the shared channel into manageable time slots, improving bandwidth efficiency while preventing traffic congestion through structured resource allocation
Solution Approach 2:
The patent introduces an intermediary mechanism where stations transmit preamble sequences and receive random access responses before actual data transmission. This intermediary step acts as a mediator that coordinates access, improving bandwidth utilization while reducing traffic congestion through controlled admission
3Reliability
If uplink transmissions from multiple terminals are coordinated through centralized control, then collision avoidance improves, but system complexity increases
Solution Approach 1:
The patent implements self-service by enabling terminals to autonomously perform channel listening, contend for resources, and transmit data based on predefined protocols. This self-service approach improves collision avoidance through distributed intelligence while minimizing system complexity by reducing centralized control requirements
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Methods and apparatus for multiple user uplink are provided. In one aspect, a method includes receiving, at a wireless device, a trigger message allocating one or more wireless transmission resources, each resource allocated to a plurality of stations. The method further includes determining whether to transmit over the allocated resources based on a contention procedure. The method further includes selectively transmitting over the allocated resources based on said determining.