Discontinuous Reception Operation for Constant Data Rate Services
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Solution Overview
Problem
In wireless communication systems, particularly in UMTS, managing discontinuous reception for constant data rate services is challenging due to the need for efficient power management and reduced UE complexity, especially when handling multiple multiplexed streams with varying data rates.
Innovation Solution
Implementing a discontinuous reception (DRX) operation where the network specifies a predetermined number of transmission time intervals (TTIs) for a physical channel, allowing the UE to suspend reception during non-data transmission periods, based on configuration parameters like modulation scheme and spreading factor, thereby reducing processing requirements and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continuously receives and processes all transmitted channels to handle multiple multiplexed streams with varying data rates, then the data transmission reliability is improved, but the power consumption increases and processing complexity increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) where the UE periodically suspends reception during predetermined transmission time intervals. The network configures DRX parameters including on-duration, inactivity timer, and DRX cycle length, allowing the UE to switch between active reception and sleep states periodically, thereby reducing power consumption while maintaining reliable data transmission through scheduled wake-up periods.
Solution Approach 2:
The patent introduces dynamic DRX operation where the UE can transition between different reception states (continuous reception, discontinuous reception, and sleep modes) based on network configuration and traffic conditions. The inactivity timer dynamically adjusts the DRX cycle based on recent data activity, allowing the system to adapt between power-saving mode and high-reliability mode as needed.
2Reliability
If the UE continuously monitors and processes all transmitted channels, then the data transmission reliability is improved, but the processing complexity increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) where the UE periodically suspends reception during predetermined transmission time intervals. The network configures DRX parameters including on-duration, inactivity timer, and DRX cycle length, allowing the UE to switch between active reception and sleep states periodically, thereby reducing power consumption while maintaining reliable data transmission through scheduled wake-up periods.
Solution Approach 2:
The patent introduces dynamic DRX operation where the UE can transition between different reception states (continuous reception, discontinuous reception, and sleep modes) based on network configuration and traffic conditions. The inactivity timer dynamically adjusts the DRX cycle based on recent data activity, allowing the system to adapt between power-saving mode and high-reliability mode as needed.
3Use of energy by moving object
If the UE suspends reception during predetermined transmission time intervals to save power, then the power consumption is reduced, but the ability to receive data with varying data rates decreases
Solution Approach 1:
The patent introduces dynamic DRX operation where the UE can transition between different reception states (continuous reception, discontinuous reception, and sleep modes) based on network configuration and traffic conditions. The inactivity timer dynamically adjusts the DRX cycle based on recent data activity, allowing the system to adapt between power-saving mode and high-reliability mode as needed.
Solution Approach 2:
The patent implements feedback mechanisms where the network monitors UE reception status and can adjust DRX parameters dynamically. The network can send scheduling assignments and uplink grants that trigger UE wake-up, ensuring that data transmission continues effectively even during DRX cycles. This feedback loop maintains adaptability to varying data rates while preserving power-saving benefits.
Data Source
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AI summary
The present invention relates to communicating between a network and a mobile terminal in a wireless communication system, and more particularly, to a discontinous reception operation for a constant data rate service. The invention includes receiving a channel during a transmission time interval, and determining not to receive a transmission from the network for a predetermined amount of transmission time intervals related to the channel after receiving the channel.