Mobile Station Transmission Rate Control via AGCH and RGCH Ignoring
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Solution Overview
Problem
Conventional mobile communication systems face challenges in rapidly controlling uplink transmission rates due to processing load and delay, leading to inefficient data transmission and resource wastage, especially during burst data transmission, and erroneous detection of the Relative Rate Grant Channel (RGCH) causes rapid decreases in transmission rates.
Innovation Solution
The method involves receiving an Absolute Rate Grant Channel (AGCH) at the mobile station and ignoring the Relative Rate Grant Channel (RGCH) until each Hybrid Automatic Repeat Request (HARQ) process has been performed once, ensuring stable transmission rate adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radio network controller RNC integrally controls multiple radio base stations to determine transmission rates, then transmission rate control can be performed considering overall network conditions, but processing load and delay increase, preventing fast control response
Solution Approach 1:
The patent divides transmission rate control into two segments: absolute rate control via AGCH from the base station, and relative rate adjustment via RGCH. This segmentation allows the base station to handle absolute rate decisions (reducing RNC processing load) while the mobile station performs relative adjustments (enabling faster response), thus resolving the contradiction between control accuracy and response time.
Solution Approach 2:
The patent establishes preliminary action by having the base station send absolute rate grants via AGCH in advance, setting a baseline transmission rate before burst traffic occurs. This preliminary rate setting allows the mobile station to quickly adjust using RGCH during burst traffic without waiting for RNC processing, reducing control delay while maintaining accuracy.
2Productivity
If the mobile station receives and processes the Relative Rate Grant Channel (RGCH) continuously, then transmission rate can be adjusted dynamically, but erroneous detection causes rapid transmission rate decreases
Solution Approach 1:
The patent applies preliminary anti-action by having the mobile station ignore RGCH immediately after receiving AGCH, before any erroneous detection can occur. This preventive measure blocks potential harmful RGCH detections during the critical period when absolute rate control is being established, preventing rapid transmission rate decreases while still allowing dynamic adjustment after the initial rate is set.
3Speed
If radio resources are reserved for high-speed communications to handle burst data transmission, then fast transmission is enabled, but radio bandwidth and hardware resources are wasted during low-traffic periods
Solution Approach 1:
The patent implements dynamic transmission rate control where the mobile station adjusts its transmission rate based on real-time RGCH indications from the base station. Instead of reserving fixed high-speed resources, the system dynamically scales transmission rate up during burst traffic and down during low-traffic periods, enabling fast transmission when needed while optimizing resource utilization efficiency at other times.
Data Source
AI summary
A transmission rate control method for controlling a transmission rate of data transmitted from a mobile station to a radio base station via an uplink, includes: receiving, at the mobile station, an Absolute Rate Grant Channel which indicates an absolute value of the transmission rate from the radio base station; and ignoring, at the mobile station, a Relative Rate Grant Channel which indicates a relative value of the transmission rate until each HARQ process has been performed once, after receiving the Absolute Rate Grant Channel.