D2D Resource Configuration for Partial Network Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current D2D communication systems lack a specific method for determining the optimal time-frequency resource positions for transmitting D2D Scheduling Assignment (SA) and D2D data, particularly in scenarios with partial network coverage.
Innovation Solution
A method where a base station configures and transmits resource configuration information indicating the number of subframes and interval for D2D SA and data transmissions, which are then used by User Equipment (UE) to allocate Physical Resource Blocks (PRBs) for D2D communications, utilizing existing or new DCI formats, System Information Broadcast (SIB) blocks, or UE-specific RRC signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations use existing PDCCH and EPDCCH to transmit D2D grant information, then D2D communication can be established, but the base station load increases and battery consumption increases
Solution Approach 1:
The patent extracts the D2D scheduling function from the base station by enabling UEs to autonomously select time-frequency resources for D2D SA and data transmissions based on pre-configured parameter sets. This removes the continuous monitoring and scheduling burden from the base station, reducing both base station load and UE battery consumption while maintaining D2D communication reliability.
Solution Approach 2:
The base station performs preliminary configuration by providing parameter sets (including time-frequency resource positions, subframe intervals, and resource allocation parameters) to UEs before D2D communications occur. This preliminary action enables UEs to autonomously determine resource positions without continuous base station intervention, reducing real-time processing load and energy consumption.
2Productivity
If base stations continuously monitor and allocate resources for D2D communications, then resource allocation can be optimized, but base station processing load increases
Solution Approach 1:
The patent implements self-service by enabling UEs to autonomously select time-frequency resources for D2D transmissions based on pre-configured parameter sets. UEs independently determine resource positions using formulas involving the parameter sets and their own identities, eliminating the need for continuous base station monitoring and dynamic scheduling, thus reducing base station processing load while maintaining allocation efficiency.
Solution Approach 2:
The base station performs preliminary configuration by providing parameter sets to UEs before D2D communications occur. These parameter sets contain all necessary information for autonomous resource selection, including time-frequency resource positions, subframe intervals, and allocation parameters. This preliminary action enables efficient autonomous resource allocation without continuous base station intervention.
3Ease of operation
If specific time-frequency resource positions are predefined for D2D SA and data, then resource allocation becomes simpler, but flexibility in adapting to different scenarios decreases
Solution Approach 1:
The patent introduces dynamics by providing multiple parameter sets with different configurations instead of a single fixed configuration. Each parameter set contains different time-frequency resource positions, subframe intervals, and allocation parameters. The base station can selectively provide appropriate parameter sets based on different scenarios (network coverage, partial coverage, no coverage), enabling flexible adaptation while maintaining simple autonomous selection operations.
Solution Approach 2:
The patent applies parameter changes by varying key parameters (time-frequency resource positions, subframe intervals, resource allocation offsets) across different parameter sets. This allows the system to adapt to different deployment scenarios and traffic conditions while maintaining the same simple autonomous resource selection mechanism. The base station selects appropriate parameter sets based on scenario requirements.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present disclosure provides a method in a base station for resource configuration for Device-to-Device (D2D) Scheduling Assignment (SA) and/or D2D data transmissions for a User Equipment (UE) and a corresponding UE. The base station transmits resource configuration for the D2D SA and/or D2D data transmissions to the UE. Frequency hopping schemes for the D2D SA and/or D2D data transmissions within one subframe or between subframes are predefined at network side. The UE obtains schemes for D2D SA and/or D2D data transmissions in time domain based on the resource configuration for the D2D SA and/or D2D data transmissions transmitted from the base station. The UE obtains schemes for D2D SA and/or D2D data transmissions in time domain based on the frequency hopping schemes for the D2D SA and/or D2D data transmissions within one subframe or between subframes are predefined the at network side.