D2D Resource Allocation via Dynamic Window Configuration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for establishing device-to-device (D2D) communication sessions in mobile devices are inefficient, relying heavily on network resources and lacking in dynamic resource allocation and power management, which limits battery life and network capacity.
Innovation Solution
A method for establishing D2D communication sessions between user equipment (UEs) that involves a UE initiating the connection, sending a pairing request, and after authorization, allocating resources through an evolved Node B (eNB), allowing for dynamic re-allocation and power-saving configurations, such as variable transmission windows and modulation schemes, to optimize communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional network-based communication methods are used to establish D2D sessions, then network control and management are maintained, but network overhead increases and battery life decreases
Solution Approach 1:
The patent segments the D2D session establishment process into distinct phases: network-controlled authorization phase (maintaining reliability) and device-autonomous resource allocation phase (reducing energy consumption). The DCME handles high-level authorization while local devices perform resource allocation, dividing control responsibilities to balance network management with energy efficiency.
Solution Approach 2:
The patent introduces a D2D communication management entity (DCME) as an intermediary that handles authorization and resource allocation coordination. This intermediary enables devices to establish D2D sessions with network permission without continuous network involvement in data transmission, reducing network overhead and device energy consumption while maintaining control.
2Reliability
If continuous network monitoring is implemented for D2D sessions, then session quality is maintained, but network overhead and device power consumption increase
Solution Approach 1:
The patent implements periodic monitoring instead of continuous monitoring, where the network checks D2D session status at predetermined intervals through scheduled reporting mechanisms. Devices report session status, resource allocation information, and quality metrics periodically, maintaining session quality assurance while significantly reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The patent enables D2D devices to autonomously monitor and manage their own session quality parameters within authorized resource allocations. Devices perform self-diagnosis of link quality, automatic resource adjustment, and local optimization without constant network intervention, reducing overall system power consumption while maintaining session quality.
3Ease of manufacture
If static resource allocation is used for D2D communication, then implementation simplicity is achieved, but network capacity and efficiency decrease
Solution Approach 1:
The patent implements dynamic resource allocation where resource blocks, time slots, and frequency channels are allocated based on real-time network conditions, device locations, and traffic demands. The DCME receives resource allocation requests from devices, evaluates current network state, and dynamically assigns resources, enabling the system to adapt to changing conditions and maximize network capacity while maintaining manageable complexity through automated decision algorithms.
4Adaptability or versatility
If D2D communication is enabled without optimized resource allocation, then device connectivity is achieved, but network capacity is limited
Solution Approach 1:
The patent utilizes parameter changes in resource allocation strategies to balance device connectivity with network capacity. The DCME adjusts allocation parameters such as resource block size, transmission power levels, time slot durations, and frequency assignments based on network load, device capabilities, and service requirements. This dynamic parameter optimization enables efficient support for multiple D2D sessions simultaneously while maximizing overall network capacity utilization.
Data Source
Figure 1
Figure 2
Figure 3A~3D
AI summary
Mobile communication devices, such as user equipment (UE) using 3GPP- LTE or LTE Advanced, may communicate directly with another UE through a system called Device-to-Device (D2D) communication. The establishment of a D2D communication session may involve having one of the UEs trigger the signaling procedures. In particular, a D2D resource re-allocation method may be used to optimize the D2D communication resource utilization efficiency in a dynamic manner, which is fully controlled by one of the D2D pair (termed the master U E or M-UE). The M-UE may be arranged to re-allocate resources based on the buffer status report (BSR) of the UEs in the D2D communication session. The M-UE may be further arranged to dynamically change the configuration of the transmission window based on characteristics of the D2D communication session.