DRX Scheduling for Device-to-Device Communication in Cellular Networks
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Solution Overview
Problem
Current wireless networking technologies face challenges in efficiently and robustly utilizing wireless networking environments for device-to-device communication in heterogeneous mobile networks, particularly in optimizing control signaling and resource sharing.
Innovation Solution
A method and device for scheduling data transmission between mobile terminals using a Discontinuous Reception (DRX) mode, allowing for device-to-device communication by pairing device-to-device-capable mobile terminals and coordinating their DRX cycles for efficient resource utilization and reduced control signaling, utilizing existing and future 3GPP LTE technologies and CR opportunistic communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous reception mode is used for device-to-device communication, then communication reliability is improved, but energy consumption increases
Solution Approach 1:
The patent applies periodic action by implementing DRX cycles where mobile terminals alternate between active reception periods and sleep periods. The base station schedules D2D communication to occur during specific DRX on-durations, allowing terminals to periodically wake up for communication opportunities and then return to low-power state, thus reducing overall energy consumption while maintaining communication reliability through scheduled periodic interactions.
Solution Approach 2:
The patent uses preliminary action by having the base station pre-configure DRX parameters and schedule D2D communication resources in advance. The base station determines appropriate DRX cycle lengths, on-duration timings, and D2D resource allocations before communication begins, allowing terminals to prepare their reception and transmission schedules ahead of time, ensuring reliable communication while optimizing power usage patterns.
2Use of energy by moving object
If DRX mode is used for mobile terminals, then energy efficiency is improved, but control signaling overhead increases
Solution Approach 1:
The patent merges D2D scheduling control with existing DRX operation by having the base station provide unified scheduling indications that cover both cellular and D2D communications during DRX on-durations. This consolidation allows the base station to manage multiple communication types through a single control framework, reducing redundant signaling while maintaining energy-efficient DRX operation for mobile terminals.
3Productivity
If device-to-device pairing is implemented, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The patent uses the base station as an intermediary to manage D2D pairing and resource allocation. Instead of requiring direct complex pairing protocols between mobile terminals, the base station mediates the pairing process, assigns D2D communication resources, and coordinates scheduling during DRX cycles. This intermediary approach simplifies terminal device complexity while maintaining high communication efficiency through centralized coordination.
Data Source
AI summary
A method and a device for data processing in a cellular network are provided including the step of scheduling data transmission between mobile terminals utilizing a DRX mode of the mobile terminals. Furthermore, a communication system is suggested including said device.