Distributed Transmission Rate Control in Wireless Networks
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Solution Overview
Problem
Conventional mobile communication systems face challenges in rapidly changing transmission rates due to processing load and delay, leading to inefficient data transmission during burst data events, resulting in low-speed and high-delay communications, and wastage of radio and hardware resources.
Innovation Solution
The implementation of a transmission rate control method that utilizes Enhanced Uplink (EUL) and Hybrid Automatic Repeat Request (HARQ) processes, with the mobile station maintaining transmission rates by detecting 'HOLD' or 'UP' commands in the Relative Grant Channel (RGCH), and using High Speed Downlink Packet Access (HSDPA) and Dedicated Physical Control Channels (DPCCH) to manage data transmission efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radio network controller RNC integrally controls a plurality of radio base stations Node B, then centralized control and coordination are achieved, but processing load and processing delay increase, making fast transmission rate control difficult
Solution Approach 1:
The patent segments the transmission rate control function from the centralized radio network controller RNC and relocates it to the distributed radio base station Node B. Specifically, the Node B independently determines the transmission rate of the dedicated channel based on local conditions (radio resources, interference volume, transmission power), eliminating the need for centralized processing and reducing control delay. This segmentation allows fast transmission rate control while maintaining reliable coordination through layer-3 signaling for notification purposes only.
2Productivity
If transmission rate control is performed fast (per 1-100 ms) to accommodate burst data traffic, then transmission efficiency improves, but processing load and operational costs increase substantially
Solution Approach 1:
The patent implements self-service by enabling the radio base station Node B to autonomously perform transmission rate control without requiring centralized processing from the RNC. The Node B independently monitors local conditions (radio resources, interference, transmission power) and determines transmission rates based on pre-configured policies received via layer-3 signaling. This self-service approach enables fast control (1-100 ms) for burst traffic while minimizing processing load and operational costs, as the distributed control eliminates repeated centralized processing requirements.
3Loss of energy
If low-speed transmission is accepted during burst data events, then processing load is reduced, but transmission delay increases and transmission efficiency decreases
Solution Approach 1:
The patent implements dynamic transmission rate control by enabling the radio base station Node B to continuously monitor local conditions (radio resources, interference volume, transmission power) and adjust the transmission rate in real-time (1-100 ms intervals). This dynamic control allows the system to rapidly increase transmission rates during burst data events, significantly reducing transmission delay and improving efficiency compared to static low-speed transmission, while maintaining manageable processing load through distributed autonomous control.
4Speed
If radio resources are reserved for high-speed communications to enable fast transmission, then transmission rate can be increased, but radio bandwidth resources and hardware resources are wasted during unoccupied states
Solution Approach 1:
The patent implements dynamic resource allocation by enabling the radio base station Node B to continuously monitor local conditions and adjust transmission rates in real-time (1-100 ms intervals). During burst data events, the system rapidly increases transmission rates by allocating radio resources as needed. During unoccupied states, the transmission rate is automatically reduced, freeing up radio bandwidth and hardware resources. This dynamic adjustment eliminates the need for permanent resource reservations, preventing resource wastage while maintaining the capability for fast high-speed transmission when required.
Data Source
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AI summary
A transmission rate control method, includes: transmitting, at a radio base station, a relative rate grant channel which includes a command for controlling a transmission rate in uplink to a mobile station; and determining, at the mobile station, that the relative rate grant channel which includes a HOLD command for instructing to maintain the transmission rate is received at the mobile station, when data to be transmitted becomes empty in a transmission buffer and a receive signal in the relative rate grant channel is detected as "0" or "+1", and maintaining the transmission rate.