D2D Resource Segmentation for In-Coverage and Out-of-Coverage UEs
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing device-to-device (D2D) communication resources, particularly in scenarios where UE devices are in-coverage (InC) or out-of-coverage (OoC) of base station service areas.
Innovation Solution
A base station assigns distinct sets of D2D communication resources to different D2D groups, with InC D2D UE devices selecting resources from assigned sets and OoC D2D UE devices selecting from reserved OoC D2D communication resources, ensuring minimal interference and efficient resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D communication resources are shared among all UE devices in the system, then resource utilization efficiency is improved, but interference between D2D groups and between D2D and macrocell communications increases
Solution Approach 1:
The patent segments D2D communication resources into distinct sets for different D2D groups and coverage scenarios. Specifically, it divides resources into those assigned to InC D2D groups and those reserved for OoC D2D groups, preventing interference between groups while maintaining efficient utilization within each segment.
Solution Approach 2:
The patent applies local quality by assigning different resource allocation strategies to different coverage scenarios. In-coverage D2D groups receive dynamically assigned resources from the base station, while out-of-coverage groups use pre-configured reserved resources, optimizing performance for each local condition.
2Object-affected harmful factors
If separate D2D communication resource sets are assigned to different D2D groups, then interference between groups is reduced, but resource management complexity increases
Solution Approach 1:
The base station acts as an intermediary that manages and assigns D2D communication resources to different D2D groups. This centralized management approach reduces interference between groups while maintaining manageable complexity through automated resource allocation and assignment procedures.
3Productivity
If OoC D2D UE devices use the same resources as InC D2D UE devices, then resource utilization is improved, but interference with macrocell communications and between coverage scenarios increases
Solution Approach 1:
The patent segments resources into those available for InC D2D communication and those reserved for OoC D2D communication. This segmentation prevents interference between coverage scenarios while allowing each segment to be fully utilized by its intended users.
Solution Approach 2:
The patent implements local quality by providing different resource allocation mechanisms tailored to each coverage scenario: dynamic assignment for InC devices with base station coordination, and reserved pre-configured resources for OoC devices operating autonomously.
Data Source
AI summary
A base station assigns a first set of device-to-device (D2D) communication resources to a first D2D group and assigns a second set of D2D communication resources to a second D2D group. The D2D communication resources of the first set are different from the D2D communication resources of the second set. The first set of D2D communication resources and the second set of D2D communication resources are subsets of reserved D2D communication resources which are a subset of defined uplink communication resources defined by a communication specification for uplink communication between the D2D UE devices and a base station where the reserved D2D communication resources not used for uplink transmission to the base station.