Dynamic Uplink Control Channel Allocation for Wireless Terminals

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Solution Overview

Problem

In EUTRA and Advanced EUTRA communication systems, the mobile station apparatus faces inefficiencies in radio resource use due to constant allocation of physical uplink control channels, leading to degraded efficiency for low-data applications and increased power consumption, while infrequent allocation results in transmission delays, making it difficult to predict data packet generation patterns for efficient resource requests.

Innovation Solution

A terminal apparatus and base station apparatus system that determines whether to transmit a message related to changing the transmission parameters of the control channel based on the transmission state, using information such as uplink transmission data, terminal apparatus speed, and transmission frequency, to efficiently manage the physical uplink control channel resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If the physical uplink control channel is allocated all the time to the mobile station apparatus, then the mobile station apparatus can request radio resources without transmission delays, but the efficiency of radio resource use deteriorates due to small data packet transmissions

Engineering Contradiction:

Improvetransmission delayVSAvoidradio resource use efficiency

Core Design Contradiction:

Loss of timeVSProductivity

Solution Approach 1:

The patent implements dynamic allocation of the physical uplink control channel by allowing the mobile station apparatus to autonomously determine transmission timing based on its own data buffer state. The transmission parameter (timing) changes dynamically according to whether the data buffer is full or not, resolving the contradiction between maintaining constant readiness (avoiding delay) and adapting to actual data needs (improving efficiency).

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The mobile station apparatus autonomously determines when to transmit the physical uplink control channel based on its own data buffer state without continuous base station scheduling. This self-service approach allows the terminal to activate the control channel only when necessary (when data buffer is full), improving radio resource efficiency while maintaining timely transmission capability.

Inventive Principle:

Principle #25Self-service

2Productivity

If the physical uplink control channel is allocated less frequently to improve radio resource use efficiency, then resource efficiency improves, but transmission delays increase

Engineering Contradiction:

Improveradio resource use efficiencyVSAvoidtransmission delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The system transitions from static periodic allocation to dynamic on-demand allocation. The mobile station apparatus monitors its data buffer state and activates the physical uplink control channel transmission only when the buffer is full, creating a dynamic adaptation mechanism that optimizes both efficiency and timing based on actual conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The mobile station apparatus autonomously determines transmission timing based on its own data buffer state without continuous base station scheduling. This self-service approach allows the terminal to activate the control channel only when necessary (when data buffer is full), improving radio resource efficiency while maintaining timely transmission capability.

Inventive Principle:

Principle #25Self-service

3Reliability

If the mobile station apparatus continuously monitors and requests radio resources, then transmission responsiveness is maintained, but power consumption increases due to multiple applications running

Engineering Contradiction:

Improvetransmission responsivenessVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic monitoring of the data buffer state at the mobile station apparatus, but only triggers physical uplink control channel transmission when the buffer becomes full. This periodic check with event-driven transmission reduces continuous monitoring overhead and associated power consumption while maintaining transmission responsiveness when data is actually available.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP2840848B1Terminal apparatus, base station apparatus, communication system, radio resource requesting method and integrated circuit

Publication Date: 2018.11.28 SHARP KK

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AI summary

Provided are a terminal apparatus, a base station apparatus, a communication system, a radio resource requesting method, and an integrated circuit that can improve efficiency of radio resource use by efficiently performing a radio resource request control between a mobile station apparatus and the base station apparatus. The base station apparatus configures a transmission parameter of a control channel used in the radio resource request and a parameter for determining a transmission state of the control channel used in the radio resource request in the terminal apparatus. The terminal apparatus transmits a message related to a permission to change the transmission parameter of the control channel used in the radio resource request to the base station apparatus on the basis of the transmission state of the control channel used in the radio resource request.