DRX Control for Multi-Carrier Power Management
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Solution Overview
Problem
In Advanced-EUTRA, mobile station apparatuses experience increased power consumption due to wider bandwidths, and there is a need for efficient intermittent reception operations that match the power consumption levels of EUTRA, as the details of intermittent reception processes are not well-determined.
Innovation Solution
A mobile station apparatus and base station apparatus implementation where DRX parameters are transmitted and applied across multiple component carriers, allowing for coordinated DRX operations to reduce power consumption by extending the reception-ON period only when necessary and prioritizing DRX control on specific carriers, thereby optimizing power management and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bandwidth is increased in Advanced-EUTRA, then the data transmission capacity is improved, but the power consumption of the mobile station apparatus increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) where the mobile station apparatus periodically switches between reception-ON periods and reception-OFF periods. During reception-ON periods, the apparatus monitors downlink control channels and receives data. During reception-OFF periods, monitoring and reception are suspended to reduce power consumption. This periodic operation allows the system to maintain high data transmission capacity when needed while significantly reducing power consumption during idle periods.
2Productivity
If the reception-ON period is extended to receive more data, then the data reception capability is improved, but the power consumption increases
Solution Approach 1:
The patent dynamically adjusts the reception-ON period duration based on actual data reception needs. When data is successfully received or no data is present, the reception-ON period is shortened or terminated early. When data transmission is detected, the reception-ON period is extended appropriately. This dynamic adjustment optimizes the balance between data reception capability and power consumption by adapting to real-time communication conditions.
3Reliability
If the mobile station apparatus monitors all component carriers continuously, then the data reception reliability is improved, but the power consumption increases
Solution Approach 1:
The patent segments the monitoring operation across multiple component carriers by applying DRX independently to each carrier. The mobile station apparatus performs discontinuous reception on each component carrier separately, switching between reception-ON and reception-OFF periods for each carrier based on data reception status. This segmentation maintains data reception reliability across all carriers while reducing overall power consumption compared to continuous monitoring of all carriers simultaneously.
Data Source
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AI summary
An efficient discontinuous reception operation is provided for a mobile station device in Advanced-EUTRA. In a mobile station device connected to a base station device using a plurality of component carriers, during discontinuous reception, one discontinuous reception parameter is applied to all the component carriers used by the mobile station device to thereby perform the operation of monitoring a control channel in all the component carriers, and when the control channel addressed to the mobile station device is received in one or more component carriers during a reception ON period, the reception ON period is extended in all the component carriers.