D2D Resource Management via Topology-Based Authorization
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Solution Overview
Problem
Current LTE systems do not enable direct Device to Device (D2D) communications on licensed frequency bands without authorization from the spectrum owner, necessitating a resource management method for D2D communications to facilitate network management functions like resource leasing and priority management.
Innovation Solution
A method and apparatus for managing D2D network resources based on network topology, involving authorization requests for D2D communication in licensed frequency spectra, resource allocation, and geographical zone-based management to enable direct UE communication while ensuring spectrum ownership and charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If D2D communication is enabled on licensed frequency bands, then direct UE communication is achieved, but spectrum ownership authorization is required
Solution Approach 1:
The system performs preliminary authorization actions by having UEs request and receive D2D communication authorization from the network before engaging in direct communication. The eNB grants authorization and provides necessary configuration parameters in advance, so that when D2D communication is needed, the UEs are already authorized and configured, eliminating the need for complex real-time authorization negotiations.
2Adaptability or versatility
If D2D communication is implemented without network authorization, then communication freedom is improved, but spectrum ownership rights are violated
Solution Approach 1:
The eNB serves as an intermediary between the spectrum owner (network) and the UEs. It receives authorization requests from UEs, validates them against network policies and spectrum ownership rules, and grants authorization when appropriate. This intermediary mechanism maintains spectrum management compliance while enabling flexible D2D communication when authorized.
3Reliability
If all D2D data is forwarded through base station, then network control is maintained, but communication efficiency is reduced
Solution Approach 1:
The system segments communication paths into two types: controlled path through eNB for signaling and authorization, and direct path between UEs for data transmission. This segmentation allows the network to maintain control over D2D communications through authorization and configuration while enabling efficient direct data transfer between UEs without eNB forwarding, thus improving communication efficiency.
4Productivity
If D2D resource management is implemented, then spectrum utilization is improved, but system complexity increases
Solution Approach 1:
The system implements self-service resource management where authorized UEs autonomously select and use D2D resources from the authorized resource pool without continuous network intervention. The eNB provides the authorized resource configuration in advance, and UEs independently manage their resource selection and usage, reducing ongoing system complexity while maintaining efficient spectrum utilization.
Data Source
AI summary
The present disclosure proposes a method for device to device communication and apparatuses using the same. More particularly, the present disclosure proposes a method and apparatuses to manage device to device (D2D) network resources based on maintain a user equipment (UE) network topology. The proposal includes a equipment (UE) requesting an authorization from the network for D2D communication in a licensed frequency spectrum, the UE would then receive through a control node or through another non-mobile UE the authorization which includes an identification (ID) information which allows the UE to engage in D2D communication in the license spectrum even when the UE is outside the range of the serving base station.