Uplink Rate Control via MAC-e Autonomous Segmentation
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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 increased costs, particularly during burst data transmissions, which results in low-speed, high-delay data transfer or wastage of radio bandwidth and hardware resources.
Innovation Solution
A transmission rate control method that involves notifying a mobile station of a maximum allowable transmission rate using an absolute rate grant channel and instructing it to reduce this rate via layer-3 signaling, especially during soft handovers, to manage interference and improve throughput while reducing complexity.
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 processing delay increase, making fast control (per 1-100 ms) difficult
Solution Approach 1:
The patent segments the transmission rate control function by introducing a MAC-e functional section at the radio base station level that can autonomously control transmission rates. This divides the previously centralized RNC control into distributed control units, enabling fast per-cell rate adjustment without burdening the RNC with processing all rate control decisions centrally.
Solution Approach 2:
The patent introduces a MAC-e functional section as an intermediary between the RNC and the transmission processing system. This intermediary handles fast transmission rate control locally at the base station, reducing the processing load on the RNC while maintaining reliable control through the MAC-e's autonomous decision-making capability.
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 costs substantially increase
Solution Approach 1:
The MAC-e functional section is designed to autonomously determine transmission rates based on local buffer status and radio conditions without requiring continuous RNC intervention. This self-service capability enables fast rate adaptation for burst traffic while keeping processing loads manageable through decentralized autonomous control.
Solution Approach 2:
The system performs preliminary configuration of the MAC-e functional section with autonomous control capabilities before burst traffic occurs. This preliminary setup allows the system to rapidly respond to burst traffic conditions without incurring the full processing load during the actual high-speed transmission periods.
3Speed
If radio resources are reserved for high-speed communications to handle burst data, then fast transmission is possible, but radio bandwidth resources and hardware resources in the radio base station are wasted during low-traffic periods
Solution Approach 1:
The MAC-e functional section dynamically adjusts transmission rates based on real-time buffer status and radio conditions. This dynamic control allows the system to allocate resources efficiently - using high transmission rates when burst traffic occurs and reducing rates when traffic is low, thereby avoiding the resource waste associated with static high-speed reservations.
Solution Approach 2:
The system changes transmission rate parameters dynamically through the MAC-e functional section based on actual traffic conditions. By adjusting the transmission rate parameter rather than maintaining a fixed high-speed configuration, the system achieves fast transmission when needed while minimizing resource consumption during low-traffic periods.
Data Source
AI summary
A transmission rate control method of this invention includes: notifying, at a radio base station Node B, a mobile station UE of a maximum allowable transmission rate of uplink user data, using an absolute rate grant channel (E-AGCH); instructing, at a radio network controller RNC, the mobile station UE to reduce the maximum allowable transmission rate by layer-3 signaling; and reducing, at the mobile station UE, the maximum allowable transmission rate according to the instruction from the radio network controller RNC, and controlling, at the mobile station UE, a transmission rate of the uplink user data based on the reduced maximum allowable transmission rate.