Shared PDCP Entity for LTE and NR D2D Communication
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Solution Overview
Problem
The challenge lies in enabling device-to-device (D2D) communication to function simultaneously in both LTE and NR standards, as existing technologies restrict terminal devices to choose only one standard for D2D communication, limiting flexibility and diversity gain in data transmission.
Innovation Solution
The proposed solution involves using a single packet data convergence protocol (PDCP) entity to perform D2D communication in both LTE and NR standards, allowing for flexible data transmission by correlating radio link control (RLC) entities and indicating information through MAC headers or subheaders to ensure compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminal devices use separate PDCP entities for LTE and NR standards, then protocol compatibility is maintained, but device complexity increases and flexibility is limited
Solution Approach 1:
The patent merges the PDCP entities for LTE and NR standards into a single shared PDCP entity. This consolidation allows the terminal device to perform D2D communication in both LTE and NR standards simultaneously without maintaining separate protocol stacks, thereby reducing device complexity while preserving adaptability across both network standards.
Solution Approach 2:
The shared PDCP entity is designed to serve multiple functions across different network standards. It can handle D2D communication protocols for both LTE and NR standards, making the protocol stack universal and eliminating the need for standard-specific PDCP implementations, thus improving flexibility without increasing complexity.
2Adaptability or versatility
If terminal devices choose only one standard for D2D communication, then protocol management is simplified, but data transmission diversity and adaptability are reduced
Solution Approach 1:
By combining the protocol stack management for both LTE and NR standards into a unified shared PDCP entity, the system achieves simplified protocol management while simultaneously enabling data transmission diversity. The single PDCP entity manages both standards' protocols, eliminating the need for complex separate management structures.
Solution Approach 2:
The universal PDCP entity provides multi-functional support for both LTE and NR D2D communication standards. This allows the terminal device to adaptively select and transmit data through either standard based on network conditions, achieving transmission diversity without requiring complex separate protocol stacks for each standard.
3Productivity
If separate PDCP entities are used for LTE and NR D2D communication, then standard-specific optimization is achieved, but resource utilization efficiency decreases
Solution Approach 1:
Merging the PDCP entities into a shared resource pool allows for more efficient resource utilization. The unified PDCP entity can dynamically allocate resources between LTE and NR D2D communications based on current network conditions and data requirements, eliminating resource duplication and improving overall productivity while maintaining manageable protocol stack structure.
Data Source
AI summary
A device-to-device (D2D) communication method includes: performing, by a terminal device using a same packet data convergence protocol (PDCP) entity, D2D communication in a long term evolution (LTE) standard and a new radio (NR) standard.