Base Station D2D Resource Allocation via QoS Candidate Selection
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Solution Overview
Problem
Mobile access networks face challenges in managing increased communication demands, leading to full load conditions at base stations, where direct Device-to-Device (D2D) communications can improve spectral efficiency but introduce interference, degrading the Quality of Service (QoS) for terminals served by the base station.
Innovation Solution
A method implemented by the base station to allocate spectral resources that maximizes overall throughput while ensuring Quality of Service (QoS) for both terminals served by the base station and authorized D2D pairs, by determining a set of candidate terminals that meet specific QoS criteria and optimizing transmission powers to achieve maximum sum throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D communications are introduced to increase communication capacity beyond base station full load, then spectral efficiency is improved, but interference is generated that degrades QoS for terminals served by the base station
Solution Approach 1:
The patent applies local quality by differentiating between two types of spectral resource allocation: exclusive allocation for CU terminals (ensuring QoS) and shared allocation for D2D pairs (increasing spectral efficiency). The base station dynamically determines which terminals receive which type of allocation based on their specific needs and characteristics, thereby resolving the contradiction between improving spectral efficiency and preventing interference degradation of QoS.
Solution Approach 2:
The patent implements dynamics by introducing dynamic spectral resource sharing where the allocation of spectral resources between CU terminals and D2D pairs is not fixed but adapts based on real-time network conditions, terminal requirements, and interference levels. The base station continuously adjusts the set of candidate CU terminals that can share spectrum with D2D pairs, allowing the system to optimize spectral efficiency while maintaining QoS under varying conditions.
2Reliability
If the base station allocates all its spectral resources to CU terminals, then QoS is ensured for served terminals, but the base station reaches full capacity and cannot serve new terminals
Solution Approach 1:
The patent applies merging by combining the spectral resources of CU terminals with D2D pair communications. Specifically, certain CU terminals are identified as candidate terminals that can simultaneously serve their own communications and provide spectral resources to D2D pairs. This merging allows the base station to exceed its traditional full load capacity while maintaining QoS for original CU terminals through the shared resource pool.
Solution Approach 2:
The patent implements universality by enabling CU terminals to serve dual functions: maintaining their own QoS-guaranteed communications while simultaneously acting as spectral resource providers for D2D pairs. This multi-functionality transforms the base station's resource allocation from a single-purpose system to a multi-functional system that can handle both guaranteed service and capacity expansion needs.
3Productivity
If the base station allows D2D pairs to share spectral resources with CU terminals, then communication capacity increases, but the complexity of resource allocation management increases
Solution Approach 1:
The patent applies self-service by enabling the base station to automatically determine the set of candidate CU terminals capable of sharing spectral resources with D2D pairs based on pre-established criteria and real-time measurements. The system uses automated algorithms to identify suitable candidate terminals, evaluate their suitability, and manage the sharing arrangements without requiring complex manual intervention, thereby handling the increased allocation complexity through intelligent automation.
Data Source
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AI summary
The present invention relates to a method of communication implemented by a base station of an access network for allocating spectral resources to terminals, the intention being direct communication between said terminals (D2D), the station having already allocated all of the spectral resources of same to served terminals (CUi), having communication established via the base station of same, said terminals defining a group (C) of terminals. The method of selecting spectral resources for D2D communications from the resources already in use for conventional communications, comprises controlling the admission of a pair D2Dj of terminals that are candidates for direct communication, comprising the defining of a set (Rj) of served terminals CUi that are candidates for sharing the respective spectral resources of same with the pair D2Dj of terminals, the only constraint being the observance, by the candidate terminal CUi and the pair D2Dj, of the respective QoS criteria of same.