Discontinuous Reception Active Period Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing discontinuous reception cycles in cellular networks face challenges in accurately determining the active period duration, leading to potential delays in payload data communication, particularly for services with strict quality of service (QoS) requirements related to latency, due to vulnerabilities in detecting control data on the PDCCH channel.
Innovation Solution
A method is introduced where a terminal and network node monitor the radio link for reception of a second message triggered by a first message, allowing for dynamic adjustment of the active period duration of the discontinuous reception cycle based on the monitoring of DTX events, thereby reducing the likelihood of future DTX events and improving communication latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If discontinuous reception cycle is implemented with fixed active period duration, then power consumption is reduced, but communication latency increases for latency-sensitive services
Solution Approach 1:
The patent applies dynamics by making the active period duration variable rather than fixed. The network node determines the active period duration dynamically based on monitoring results of downlink assignments and uplink grants, allowing the system to adapt between power-saving mode (shorter active period) and low-latency mode (longer active period) according to actual communication conditions and service requirements
Solution Approach 2:
The patent changes the parameter of active period duration based on monitored communication patterns. By adjusting this parameter according to the reliability of downlink assignment reception and uplink grant transmission, the system optimizes the trade-off between power consumption and communication latency for different service types
2Reliability
If active period duration is extended to reduce missed detection of control data, then communication reliability improves, but power consumption increases
Solution Approach 1:
The patent implements feedback by having the network node monitor whether downlink assignments are successfully received and whether uplink grants are successfully transmitted. Based on this feedback information, the network node adjusts the active period duration, creating a closed-loop control system that optimizes reliability while minimizing power consumption
Solution Approach 2:
The system performs self-optimization where the network node automatically determines and adjusts the active period duration based on monitored communication conditions, eliminating the need for manual configuration or complex terminal-side decision-making while achieving optimal reliability-power trade-off
3Reliability
If discontinuous reception cycle uses longer active period to meet strict QoS latency requirements, then service quality improves, but power consumption increases
Solution Approach 1:
The patent enables dynamic adaptation to different service requirements by allowing the active period duration to be adjusted based on monitored communication conditions. For latency-sensitive services, the system can determine longer active periods to ensure timely delivery, while for non-latency-sensitive services, shorter active periods reduce power consumption
Data Source
AI summary
A first message is transmitted via a radio link of a cellular network to a terminal. The first message triggers the terminal to transmit a second message via the radio link at the associated transmission interval. The radio link is monitored for reception of the second message at the associated transmission interval. Based on said monitoring, the duration of an active period of the discontinuous reception cycle to be implemented by the terminal is determined.