Dynamic Reverse-Link Rate Control in Wireless Systems
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Solution Overview
Problem
Current power-control procedures in wireless communication systems, such as those using IS-856, are limited in their ability to quickly increase reverse-link data transmission rates due to fixed parameters, which restrict the flexibility of data transmission rate adjustments in response to changing operating conditions.
Innovation Solution
The method involves an access terminal and base station collaboration, where the access terminal adjusts its reverse-link data transmission rate by dynamically modifying parameters in response to reverse-noise messages and parameter-adjustment messages, allowing for an accelerated increase in data transmission rates when favorable RF conditions are met, thereby enhancing system throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If fixed parameters are used in power-control procedures, then system stability is maintained, but the ability to quickly increase reverse-link data transmission rates is limited
Solution Approach 1:
The patent applies dynamics by transitioning from fixed parameters to dynamic parameters that can change based on RF conditions. The base station determines whether to transmit parameter-adjustment messages based on current RF conditions, allowing the system to adapt the rate-control parameters in real-time. This enables the access terminal to quickly increase data transmission rates when favorable conditions exist, while maintaining stability when conditions are poor.
Solution Approach 2:
The patent implements parameter changes by modifying the rate-control parameters dynamically. When the base station detects favorable RF conditions (threshold number of access terminals operating above threshold quality level), it transmits parameter-adjustment messages that change the parameters used by access terminals to calculate data transmission rates. This allows the system to optimize performance based on actual operating conditions rather than using fixed parameters.
2Productivity
If access terminals use fixed rate-control parameters, then operation simplicity is maintained, but system throughput is limited under favorable RF conditions
Solution Approach 1:
The patent applies feedback by implementing a mechanism where the base station monitors RF conditions and provides parameter-adjustment messages to access terminals based on that feedback. The base station determines whether to send adjustment messages by assessing the current state of access terminals (threshold number above threshold quality level). This feedback loop enables the system to automatically optimize throughput based on real-time conditions without requiring complex manual configuration.
Solution Approach 2:
The patent implements self-service by allowing the system to automatically adjust parameters based on observed conditions without external intervention. The base station autonomously determines when parameter adjustments are beneficial (when threshold number of access terminals are operating under favorable conditions) and transmits appropriate messages. The access terminals automatically apply the adjusted parameters without requiring user configuration, enabling the system to self-optimize throughput.
Data Source
AI summary
A method and system is disclosed for dynamic adjustment of reverse-link rate-control parameters. An access terminal in a wireless communication system that includes a base station will operate in a state in which the access terminal responds to receiving reverse-noise messages from the base station by (i) transmitting data on a reverse-link traffic channel to the base station at a data transmission rate based at least on the received reverse-noise messages and on a level of a resource in reserve for consumption in data transmission, and (ii) when the received reverse-noise messages indicate that conditions for increasing the data transmission rate are satisfied, replenishing the resource by an allocation size specified by at least one parameter. In response to receiving the parameter-adjustment message and while still operating in the state, the access terminal will increase the allocation size by adjusting the at least one parameter, and thereby increase an amount by which the data transmission rate increases.