PDCCH Configuration Switching for Terminal Power Reduction
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Solution Overview
Problem
In 5G communication systems, the existing methods for monitoring downlink control channels are inefficient in reducing power consumption, as they do not dynamically adapt to changing conditions, leading to unnecessary energy expenditure by terminals.
Innovation Solution
The method involves dynamically changing the configuration of physical downlink control channel (PDCCH) monitoring parameters such as monitoring period, search space, and bandwidth, using configuration switching indicators transmitted by the eNB to the UE, allowing for adaptive power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal monitors the downlink control channel continuously using fixed configuration, then the reliability of control channel reception is improved, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by enabling the terminal to switch between multiple PDCCH monitoring configurations (first configuration with longer monitoring period and second configuration with shorter monitoring period) based on received indicators from the eNB. This dynamic adaptation allows the terminal to adjust its monitoring behavior from continuous fixed monitoring to conditional variable monitoring, thereby reducing power consumption while maintaining reception reliability when needed.
Solution Approach 2:
The patent changes the monitoring parameters (monitoring period, search space configuration, bandwidth configuration) based on the configuration switching indicator received from the eNB. By modifying these parameters dynamically between different configurations, the system optimizes the balance between power consumption and control channel monitoring effectiveness under varying network conditions.
2Device complexity
If the terminal uses fixed PDCCH monitoring configuration, then the device complexity is reduced, but the adaptability to changing network conditions deteriorates
Solution Approach 1:
The system introduces dynamic configurability through configuration switching indicators that enable the terminal to adapt its monitoring parameters in response to changing network conditions. The terminal maintains a set of pre-configured monitoring patterns and switches between them based on network feedback, providing adaptability without requiring complex real-time configuration calculations.
Solution Approach 2:
Multiple PDCCH monitoring configurations are prepared in advance and stored in the terminal. When the eNB needs to change monitoring parameters, it simply transmits a configuration switching indicator that selects from the pre-prepared configurations, avoiding the need for complex real-time configuration generation and reducing overall system complexity.
3Use of energy by moving object
If the terminal monitors PDCCH with longer monitoring period, then the power consumption is reduced, but the responsiveness to scheduling changes deteriorates
Solution Approach 1:
The system dynamically switches between monitoring periods based on network conditions. When the eNB transmits a configuration switching indicator, the terminal transitions from the first configuration (longer monitoring period, lower power consumption) to the second configuration (shorter monitoring period, higher responsiveness). This dynamic adjustment allows the system to optimize between power saving and scheduling responsiveness according to actual network state.
Solution Approach 2:
The eNB provides feedback through configuration switching indicators that inform the terminal about the current network condition and required monitoring intensity. Based on this feedback, the terminal adjusts its monitoring period accordingly, ensuring that scheduling responsiveness is maintained when needed while minimizing power consumption during stable conditions.
Data Source
AI summary
The present disclosure relates to a communication technique for combining a 5G communication system for supporting higher data transmission rates after 4G systems with IoT technology, and a system therefor. The present disclosure can be applied for intelligent services based on 5G communication technology and IoT related technology (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security and safety related services, and the like). The present invention provides a method and an apparatus for dynamically modifying a configuration of a physical downlink control channel, wherein a base station of a communication system of the present invention may determine whether to dynamically modify a physical downlink control channel (PDCCH) configuration, transmit to a terminal a configuration modification indicator indicating a configuration to be modified if dynamically modifying the PDCCH configuration, and apply the modified configuration and transmit downlink control information (DCI) onto the PDCCH.