Radio Base Station Transmission Rate Control for Uplink Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional mobile communication systems face challenges in rapidly 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 increased costs, with the Enhanced Uplink (EUL) method causing reception power issues and resource wastage.
Innovation Solution
A transmission rate control method where the radio base station determines and notifies a maximum granted value for uplink user data transmission based on successful throughput, using a transmission rate control channel to adjust the transmission rate, thereby optimizing resource allocation and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radio network controller integrally controls multiple radio base stations to determine transmission rates, then centralized control and coordination are achieved, but processing load and processing delay increase significantly
Solution Approach 1:
The patent segments the transmission rate control function from the radio network controller to the radio base station. The radio base station independently determines the granted value for uplink user data based on local channel conditions and queue status, eliminating the need for centralized rate determination and reducing processing delay while maintaining coordinated control through resource allocation messages.
Solution Approach 2:
The radio base station performs preliminary actions by pre-configuring transmission parameters and maintaining buffer status information in advance. This allows the base station to quickly determine granted values without waiting for centralized controller decisions, reducing processing delay while ensuring reliable resource allocation.
2Reliability
If transmission rate control is performed at the radio network controller, then network-wide resource coordination is achieved, but device complexity and operational costs increase
Solution Approach 1:
The control function is segmented from the radio network controller to the radio base station. The base station independently determines granted values based on local conditions, reducing controller complexity and operational costs while maintaining resource coordination through standardized messaging protocols for resource allocation and status reporting.
Solution Approach 2:
The radio base station performs self-service by autonomously determining transmission rates based on local channel conditions and queue status. This eliminates the need for complex centralized control logic, reducing device complexity and operational costs while ensuring reliable resource allocation through local decision-making.
3Speed
If radio resources are reserved for high-speed communications, then fast transmission rates are achieved, but radio bandwidth resources and hardware resources are wasted when channels are unoccupied
Solution Approach 1:
The patent implements dynamic resource allocation where the radio base station adjusts the granted value based on real-time channel conditions and queue status. Transmission rates are dynamically changed without pre-reserving resources, achieving fast transmission when needed while avoiding resource wastage when channels are unoccupied through on-demand allocation.
Solution Approach 2:
The system changes transmission parameters dynamically by adjusting the granted value based on current channel conditions and queue status. This allows fast transmission rates to be achieved when resources are actually needed while avoiding the wastage associated with static resource reservation, as parameters are modified in real-time based on actual traffic demands.
4Speed
If the transmission rate of uplink user data is changed rapidly, then responsiveness to burst traffic is improved, but processing load in the radio network controller increases
Solution Approach 1:
The control function is segmented to the radio base station, which independently determines granted values at fast time intervals based on local conditions. This enables rapid transmission rate changes to respond to burst traffic without increasing the processing load of the radio network controller, as the base station performs the computationally intensive rate determination locally.
Solution Approach 2:
The radio base station performs preliminary actions by maintaining up-to-date information about channel conditions and queue status, enabling it to rapidly determine granted values without requiring real-time centralized controller intervention. This achieves fast control response while keeping the controller's processing load manageable.
Data Source
AI summary
A transmission rate control method according to the present invention includes: determining, at the radio base station NodeB, a maximum granted value that can be notified to the mobile station UE, in accordance with a throughput at which the uplink user data transmitted from the mobile station UE to the radio base station NodeB is successfully received at a point of time; calculating, at the radio base station NodeB, as an allowable value to be notified to the mobile station UE, a granted value not more than the maximum granted value; notifying, from the radio base station NodeB to the mobile station UE, the granted value calculated at the radio base station NodeB, by using a transmission rate control channel; and transmitting, from the mobile station UE, the uplink user data, at the transmission rate corresponding to the granted value notified from the radio base station NodeB.