User Terminal Cell Load Estimation via Ranging Response Counting
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Solution Overview
Problem
Conventional communication systems, primarily designed for voice services, struggle to efficiently provide broadband Internet services due to limited bandwidth and high subscription fees, and user terminals lack the ability to actively control communication states as they cannot estimate cell load independently.
Innovation Solution
A user terminal in a wireless communication system is equipped with a ranging response counter and load estimator to count and estimate cell load based on received ranging response messages, allowing it to actively control communication states, including FA handover, data rate, and ranging timer, by comparing the load with threshold values and adapting accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If cell load estimation is performed unilaterally by the base station, then the base station can control communication states, but the user terminal cannot actively control communication states
Solution Approach 1:
The user terminal performs self-service by autonomously estimating cell load through counting ranging response messages and actively controlling its own communication states (handover, data rate, ranging timer) based on the estimated load, without requiring base station control for these functions
Solution Approach 2:
The user terminal implements a feedback mechanism by continuously monitoring the number of ranging response messages, estimating cell load based on this feedback, and adjusting communication parameters accordingly to maintain optimal performance
2Adaptability or versatility
If a user terminal can estimate cell load actively, then the user terminal can control communication states more actively, but the conventional user terminal lacks this capability
Solution Approach 1:
The terminal enhances its adaptability by implementing self-service load estimation functionality, enabling it to autonomously adapt communication states (handover decisions, data rate adjustment, ranging timer optimization) based on estimated cell load conditions
3Reliability
If loads are considerably different between FAs, then cell load balancing is needed, but the user terminal cannot determine optimal handover without load estimation
Solution Approach 1:
The terminal uses feedback from counting ranging response messages to estimate cell load and make informed handover decisions, ensuring reliable service quality by selecting target FAs with lower estimated load
Data Source
AI summary
An apparatus and method for estimating a cell load in a wireless communication system are provided. The apparatus includes a ranging response counter, a load estimator, an FA handover determiner, a data rate determiner, and a handover determiner. The ranging response counter counts the number of ranging response messages that are received during one period of periodic ranging. The load estimator estimates a cell load on the basis of the number of the ranging response messages. The FA handover determiner determines an FA handover on the basis of the cell load from the load estimator. The data rate determiner controls a data rate of a service on the basis of the cell load from the load estimator and requests the controlled data rate to the system. The handover determiner controls handover parameters on the basis of the cell load from the load estimator.