D2D UE Coverage-Specific Parameter Selection for Interference Mitigation
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Solution Overview
Problem
Device-to-device (D2D) communications in cellular networks face challenges with interference and coverage issues, particularly in partial or out-of-network coverage scenarios, leading to performance degradation and potential non-compliance with regulatory emission requirements.
Innovation Solution
D2D devices are pre-configured with coverage-specific parameters that adjust based on their operating scenario, allowing them to optimize transmission power and emissions to maintain communication efficiency and reduce interference, even without full network coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If D2D devices transmit at high power to maintain communication in out-of-coverage scenarios, then communication reliability is improved, but interference to other devices and non-compliance with emission regulations increases
Solution Approach 1:
The patent applies local quality by configuring different transmission parameters specifically for out-of-coverage scenarios. Devices receive dedicated parameter sets (including reduced maximum transmit power, adjusted MPR values, and modified emission masks) that are locally optimized for edge cases where network coverage is absent, rather than using uniform parameters across all operating conditions.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting transmission power parameters, MPR (maximum power reduction) values, and emission masks based on coverage status. When a device detects it is out-of-coverage, it switches to a pre-configured parameter set that limits transmit power and modifies emission characteristics to prevent harmful interference while maintaining essential communication functionality.
2Duration of action of stationary object
If D2D devices operate autonomously without network supervision in out-of-coverage scenarios, then communication continuity is improved, but interference control and emission compliance deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-configuring autonomous operation parameters in devices before they enter out-of-coverage scenarios. The network provides parameter sets (including power limits, MPR configurations, and emission masks) in advance through system information or dedicated signaling, so devices can immediately switch to autonomous operation with pre-defined interference control parameters when coverage is lost, ensuring both continuity and compliance.
Solution Approach 2:
The patent implements self-service by enabling devices to autonomously select and apply appropriate transmission parameters based on their own coverage status detection. Devices monitor their own connection status to the network and automatically switch between network-supervised and autonomous parameter sets without requiring continuous network intervention, thereby maintaining interference control independently.
3Device complexity
If D2D devices use uniform transmission parameters across all coverage scenarios, then device complexity is reduced, but communication performance and interference management in partial/out-of-coverage scenarios deteriorate
Solution Approach 1:
The patent applies universality by designing a unified parameter management framework that handles both network-covered and out-of-coverage scenarios through a single mechanism. Devices maintain one parameter configuration set from the network and one autonomous parameter set, with automatic selection based on coverage status. This multi-functional approach covers all operating conditions without requiring separate specialized systems for each scenario.
Data Source
AI summary
The embodiments herein relate to a method in a first D2D UE (101) arranged for performing a D2D operation with at least one second D2D UE (101′). The first D2D UE (101) acquires one or more coverage specific parameters for use by the first D2D UE (101) for the D2D operation. The first D2D UE (101) determines the network coverage scenario in which the first D2D UE (101) is operating or is expected to operate. The first D2D UE (101) selects one or more coverage specific parameters belonging to the acquired one or more coverage specific parameters. The first D2D UE (101) uses the selected one or more coverage specific parameters for performing the D2D operation in the determined network coverage scenario.