Base Station D2D Resource Scheduling Proximity Rule
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Solution Overview
Problem
Existing technologies fail to efficiently manage radio resource interference and spatial reuse among multiple device-to-device (D2D) communication pairs in proximity, leading to inefficiencies in radio resource allocation.
Innovation Solution
A base station schedules radio resources for D2D transmissions using an allocation rule that allows non-proximal D2D communication pairs to share the same resource while preventing proximal pairs from doing so, thereby minimizing interference and enabling efficient spatial reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If radio resources are allocated to multiple D2D communication pairs without considering proximity, then resource allocation efficiency is improved, but interference between nearby D2D pairs increases
Solution Approach 1:
The patent applies local quality by differentiating resource allocation based on the spatial proximity of D2D communication pairs. The base station identifies pairs that are close to each other and assigns them different radio resources (time slots, frequency resources, or spatial beams), while allowing non-proximal pairs to share the same resources. This localized differentiation resolves the contradiction by maintaining high resource utilization while preventing interference in specific geographic areas.
Solution Approach 2:
The patent introduces spatial proximity as an additional dimension for resource allocation decisions. Beyond traditional time and frequency domains, the system considers the spatial dimension by determining whether D2D pairs are close to each other. This multi-dimensional approach allows the system to allocate resources efficiently across time, frequency, and space, resolving the contradiction between resource efficiency and interference prevention.
2Adaptability or versatility
If the same radio resource is shared by multiple D2D communication pairs, then spatial reuse is improved, but interference in proximal areas increases
Solution Approach 1:
The patent enables spatial reuse by allowing the same radio resources to be shared across different geographic areas where D2D pairs are not in proximity. The base station identifies regions where interference is unlikely and permits resource sharing, thereby improving spatial reuse capability. Simultaneously, it prevents proximal pairs from sharing resources, eliminating the harmful interference effect.
Solution Approach 2:
The base station acts as an intermediary that coordinates resource allocation among multiple D2D communication pairs. It monitors the proximity relationships between pairs and mediates resource assignment to maximize spatial reuse while preventing interference. This intermediary control enables the system to achieve high adaptability in resource sharing while maintaining signal quality.
3Device complexity
If radio resources are allocated without proximity awareness, then allocation complexity is reduced, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent implements a self-service mechanism where D2D communication pairs autonomously report their proximity relationships to the base station. The base station uses this self-reported information to make intelligent resource allocation decisions, achieving high resource utilization efficiency without requiring complex centralized monitoring of all pair interactions. This self-service approach balances complexity and efficiency.
Data Source
AI summary
A base station (2) is configured to schedule radio resources to device-to-device (D2D) transmissions (101A, 101B and 101C) performed by D2D communication pairs (3A, 3B and 3C) in accordance with an allocation rule that permits two D2D communication pairs (3A and 3C) that are not in proximity to each other to share an identical radio resource but prohibits two D2D communication pairs (3A and 3B) in proximity to each other from sharing an identical radio resource. Each D2D transmission (101) includes wirelessly transmitting from one radio terminal (1) directly to the other radio terminal (1) in each D2D communication pair (3) without passing through the base station (2). It is, thus, possible to enable efficient spatial reuse of radio resources in D2D transmissions performed by D2D communication pairs.