Access Channel Load Management via Terminal Rate Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face challenges in managing the load of access channels, leading to increased delays and inefficiencies due to heavy usage, which existing mechanisms like adjusting persistence values or back-off periods fail to address fairly, impacting both well-behaved and offending terminals.
Innovation Solution
Implementing a rate control algorithm that regulates terminal access based on past activities, using parameters like token bucket or leaky bucket to control the access channel load, ensuring fairness by adjusting token inflow rates and maximum bucket levels according to system load conditions and priority levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional load management mechanisms (adjusting persistence values or back-off periods) are used, then access channel load can be reduced, but fairness is compromised as both well-behaved and offending terminals are impacted equally
Solution Approach 1:
The patent applies local quality by differentiating treatment among terminals based on their access behavior. Terminals are classified into categories (e.g., well-behaved, offending) and assigned different persistence values or back-off periods specific to their category. This ensures that load management actions are localized to specific terminal groups rather than applied uniformly, thereby maintaining fairness while reducing overall access channel load.
2Productivity
If access channel load is reduced by restricting terminal access, then system performance improves, but access delays increase for legitimate users
Solution Approach 1:
The patent implements dynamic load management by continuously monitoring access channel conditions and adjusting persistence values or back-off periods in real-time. When load is high, more restrictive parameters are applied; when load is low, parameters are relaxed to allow faster access. This dynamic adaptation ensures system performance is maintained while minimizing access delays for legitimate users under normal conditions.
Solution Approach 2:
The system employs feedback mechanisms where terminals report their access outcomes and the system monitors access channel load. Based on this feedback, the system adjusts persistence values and back-off periods for different terminal categories. This closed-loop control ensures that load reduction actions do not excessively increase access delays, as the system responds to actual system conditions rather than applying fixed restrictions.
3Device complexity
If uniform load management is applied to all terminals, then implementation is simple, but fairness and prioritization of critical communications are compromised
Solution Approach 1:
The patent segments terminals into distinct categories based on their access behavior and service requirements. Different persistence values and back-off periods are assigned to each segment (e.g., well-behaved terminals, offending terminals, high-priority terminals). This segmentation enables differentiated load management that maintains fairness and supports prioritization of critical communications while keeping the implementation structure relatively simple through category-based classification.
Data Source
AI summary
Techniques for managing the load of an access channel in a wireless communication system are described. In an aspect, the load of the access channel may be controlled by having each terminal regulates its use of the access channel (e.g., its rate of system access) based on a rate control algorithm (e.g., token bucket). The rate control algorithm may maintain information on past activities of a terminal and may regulate the use of the access channel by the terminal based on its past activities in order to control the access channel load and achieve fairness. The system may determine at least one parameter value for the rate control algorithm based on load conditions and may broadcast the at least one parameter value to terminals. Each terminal may regulate its use of the access channel based on the at least one parameter value received from the system.