Scheduling Apparatus for D2D Communication Setup
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Solution Overview
Problem
Existing D2D communication setup in cellular radio communication systems faces inefficiencies due to the need for beacon signals, which can cause interference and waste resources, especially when devices are not in proximity, leading to unnecessary allocation of communication resources.
Innovation Solution
A scheduling apparatus that utilizes topographical and position information to determine feasibility of direct wireless communication between devices, allocating specific frequency and time resources only when D2D communication is viable, thereby reducing interference and resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beacon signals are allocated for D2D communication setup, then device discovery capability is improved, but resource wastage and interference increase when devices are not in proximity
Solution Approach 1:
The network node performs preliminary assessment using position information and topographical data before allocating beacon signals. By determining in advance whether devices are in suitable proximity for D2D communication, the system avoids unnecessary beacon signal allocation and resource wastage while maintaining reliable device discovery when D2D is feasible
Solution Approach 2:
The network node acts as an intermediary that mediates between device discovery requirements and resource efficiency. It uses position information and topographical data as intermediate assessment criteria to determine whether to enable D2D communication, thereby preventing direct interference between beacon signals and cellular communications
2Object-affected harmful factors
If orthogonal resources are allocated for beacon signalling, then interference with other communications is reduced, but capacity waste increases when devices are too far apart
Solution Approach 1:
The system performs preliminary evaluation using position information and topographical data before allocating orthogonal resources for beacon signalling. This advance assessment ensures that orthogonal resources are only allocated when devices are in proximity and D2D communication is feasible, eliminating capacity waste while maintaining interference protection when needed
3Reliability
If D2D communication is enabled without position verification, then communication availability is improved, but interference with network communication increases
Solution Approach 1:
The network node performs preliminary verification of position information and topographical data before enabling D2D communication. This advance check ensures that D2D is only established when devices are in suitable proximity, maintaining communication availability while preventing interference with network communication by avoiding inappropriate D2D setup
Solution Approach 2:
The system uses feedback from position information and topographical data to dynamically determine whether to enable D2D communication. This feedback mechanism ensures that D2D is activated only when spatial conditions are appropriate, balancing communication availability with interference prevention
Data Source
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AI summary
The invention relates to a scheduling apparatus 109 for a cellular radio communication system 110. The apparatus comprises a processor. The processor is configured for obtaining topographical information concerning a geographical area covered by the communication system, from a database 111 comprising the topographical information. The processor is also configured for obtaining information about a geographical position held by a first wireless communication terminal 101 and a geographical position held by a second wireless communication terminal 102 of the communication system within said area. The processor is also configured for determining, based on the obtained topographical information and on the obtained geographical positions, whether direct wireless communication should be set up between the first wireless communication terminal and the second wireless communication terminal. The processor is also configured for allocating frequency and/or time resources for the direct communication between the terminals if it has been determined that direct wireless communication should be set up.