Dynamic DRX Configuration via UE Traffic Statistics
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Solution Overview
Problem
Current mobile communication networks face challenges in managing network congestion, inefficient resource usage, and maintaining quality of service (QoS) due to the diverse and unpredictable traffic patterns of smartphone applications, which lead to increased signaling overhead and UE battery consumption.
Innovation Solution
User Equipment (UE) provides traffic statistics, such as packet inter-arrival time and UE state information, to the eNodeB for efficient DRX configuration and RRC reconfiguration, optimizing DRX parameters and RRC state transitions based on traffic patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional network design prioritizes real-time voice traffic and optimizes for long uninterrupted data sessions, then voice service quality is maintained and bandwidth is efficiently allocated, but signaling overhead increases by 30-50% due to frequent session establishment and teardown for short infrequent data sessions
Solution Approach 1:
The patent implements dynamic DRX parameter adjustment based on real-time traffic pattern detection. The system transitions from static DRX configurations to dynamic adaptation, where DRX cycle lengths and parameters are modified according to detected traffic characteristics (periodic, bursty, event-driven), thereby optimizing resource usage for diverse application types without compromising voice service quality
Solution Approach 2:
The system changes physical layer parameters (DRX cycle duration, measurement timing) based on detected traffic patterns. By identifying whether traffic is periodic, bursty, or event-driven, the network dynamically adjusts DRX parameters to match the application requirements, reducing signaling overhead for short data sessions while maintaining optimal performance for voice and long-duration data transfers
2Productivity
If DRX and RRC state transition are used to manage network resources, then energy efficiency is improved and network capacity is increased, but they do not work effectively under diverse data application environments, leading to increased UE power consumption and QoS degradation
Solution Approach 1:
The patent implements a feedback mechanism where the UE detects its own traffic patterns and reports them to the network, or the network detects traffic patterns directly. This feedback loop enables the system to adapt DRX parameters based on actual application behavior, ensuring effective resource management across diverse application types including chatty applications, keep-alive messages, and traditional data transfers
Solution Approach 2:
The system transitions from static DRX configurations to dynamic adaptation, where DRX parameters are continuously adjusted based on detected traffic characteristics. This dynamic approach enables effective resource management for diverse applications, preventing both excessive power consumption and QoS degradation by matching DRX behavior to actual traffic patterns
3Device complexity
If eNodeB configures DRX parameters without traffic statistics from UE, then network control is simplified, but configuration efficiency is reduced and battery consumption increases due to inability to adapt to diverse data applications
Solution Approach 1:
The patent enables the UE to self-detect its traffic patterns and either report them to the network or autonomously adjust its DRX behavior. This self-service approach allows the UE to optimize its own power consumption by identifying periodic, bursty, or event-driven traffic patterns and adapting DRX parameters accordingly, reducing battery consumption without increasing network control complexity
Solution Approach 2:
The system performs preliminary traffic pattern detection and classification before finalizing DRX configuration. By detecting traffic characteristics early in the connection establishment or during operation, the network can pre-configure appropriate DRX parameters, avoiding later adjustments and reducing overall UE power consumption while maintaining simple network control
Data Source
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AI summary
A method of triggering and reporting traffic statistics in a cellular network is proposed. A UE establishes an RRC connection with a base station. The UE collects traffic statistics upon detecting a trigger event. The traffic statistics comprises packet inter-arrival time. The trigger event may be detected by the UE or by the base station. The UE then determines a representation of the traffic statistics and report the result to the base station. The report may be triggered by the UE or by the base station based on another trigger event. Upon receiving the traffic statistics, the base station determines RRC reconfiguration parameters. In one example, DRX timer values are determined based on intra-burst packet inter-arrival time. In another example, RRC release timer is determined based on inter-burst packet inter-arrival time.