Mobile Station Transmission Rate Control via E-AGCH
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Solution Overview
Problem
Conventional mobile communication systems face challenges in efficiently controlling uplink user data transmission rates due to increased processing load and delay in radio network controllers, leading to inefficient use of radio resources and hardware, especially during cell changes, resulting in low-speed and high-delay data transmission.
Innovation Solution
A method for a mobile station to store and update common absolute transmission rates based on dedicated or common absolute transmission rate control channels, allowing seamless switching between transmission rate controls and optimizing radio resource usage by deleting or updating stored rates during cell changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the radio network controller integrally controls multiple radio base stations, then the system can maintain centralized control, but the processing load and processing delay in the radio network controller increase, making fast control for changing transmission rate difficult
Solution Approach 1:
The patent segments the transmission rate control function by introducing a new control channel (E-AGCH) that operates independently from the existing RNC-controlled layer-3 signaling. This allows the radio base station to perform fast transmission rate adjustments without requiring RNC intervention, thereby reducing processing delay while maintaining centralized control architecture.
Solution Approach 2:
The patent introduces an intermediary control channel (E-AGCH) between the radio base station and mobile station that mediates transmission rate control. This intermediary mechanism enables fast rate changes at the base station level without directly increasing RNC processing load, resolving the contradiction between centralized control and fast response capability.
2Ease of manufacture
If the transmission rate control is performed at layer-3 by the radio network controller, then the control can be implemented with existing architecture, but the transmission rate cannot be changed fast enough for burst data communications
Solution Approach 1:
The patent introduces a dynamic control mechanism at layer-1/layer-2 through the E-AGCH channel, allowing the transmission rate to be changed rapidly based on real-time burst traffic conditions. This dynamic adjustment capability operates independently of the slower layer-3 RNC control, enabling fast response while maintaining compatibility with existing layer-3 architecture.
3Productivity
If fast control for changing transmission rate is implemented, then burst data transmission efficiency improves, but the costs for implementing apparatus and operating network increase substantially
Solution Approach 1:
The patent makes the E-AGCH channel universal by allowing it to serve multiple functions: it can be used for dedicated transmission rate control, common transmission rate control, or both simultaneously. This multi-functionality reduces the need for separate dedicated control mechanisms, thereby limiting the increase in implementation cost while enabling fast control for burst data transmission.
4Adaptability or versatility
If the mobile station stores the common absolute transmission rate, then seamless switching between dedicated and common control is enabled, but the stored rate may become inappropriate after cell change
Solution Approach 1:
The patent applies preliminary action by having the mobile station store the common absolute transmission rate in advance before cell change occurs. When cell change happens, the stored rate can be immediately used as a starting point, and the station can quickly acquire the updated rate from the new serving cell's E-AGCH, ensuring continuous appropriate operation without interruption.
Solution Approach 2:
The patent implements feedback by requiring the mobile station to continuously monitor and acquire the E-AGCH from the current serving cell to update the stored common absolute transmission rate. This feedback mechanism ensures that the stored rate remains appropriate even after cell change, as the station actively updates the rate based on the new cell's control signals.
Data Source
AI summary
A transmission rate control method for controlling, at a mobile station, a transmission rate of uplink user data, based on a dedicated absolute transmission rate of uplink user data received via a dedicated E-AGCH which is transmitted using a dedicated identifier for the mobile station or a common absolute transmission rate of uplink user data received via a common E-AGCH which is transmitted using a common identifier for mobile stations which satisfy a predetermined condition, includes: storing, at the mobile station, the common absolute transmission rate of the uplink user data received via the common E-AGCH; and deleting, at the mobile station, the stored common absolute transmission rate of the uplink user data when changing a serving cell for the mobile station.