Dynamic Resource Allocation for D2D Link Quality in LTE-Direct
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Solution Overview
Problem
In LTE-Direct communication systems, device-to-device (D2D) connections often suffer from interference and link quality degradation due to shared uplink resources, leading to service outages and reduced network efficiency.
Innovation Solution
A method and apparatus for dynamically shifting D2D connections to alternative network resources within a set allocated by a base station until a link quality threshold is met, ensuring stable and efficient communication by monitoring and adjusting the resource allocation based on link quality parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D connections use shared uplink resources in LTE-Direct communication, then network resource utilization is improved, but link quality and reliability deteriorate due to interference
Solution Approach 1:
The patent implements dynamic resource allocation where the network resource assigned to D2D connections is not fixed but can be changed based on real-time link quality conditions. The base station monitors link quality parameters and dynamically reassigns resources to maintain reliable communication while efficiently utilizing available spectrum.
Solution Approach 2:
The system changes the network resource parameter (frequency, time slot, or code) assigned to D2D connections based on link quality measurements. When interference causes link quality degradation, the system transitions to alternative resources with different parameters to restore reliable communication.
2Stability of the object's composition
If D2D connections are maintained on initial network resources, then connection stability is improved, but adaptability to interference conditions deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where link quality parameters are continuously measured and reported to the base station. This feedback loop enables the system to detect interference conditions and trigger resource reassignment, balancing connection stability with adaptability to changing environmental conditions.
3Reliability
If link quality monitoring and resource shifting is implemented, then link quality and reliability are improved, but device complexity increases
Solution Approach 1:
The base station acts as an intermediary that centralizes the complexity of resource management. Instead of requiring complex autonomous resource allocation algorithms at each UE, the base station monitors link quality and makes resource assignment decisions, simplifying the device implementation while maintaining reliable D2D communication.
Data Source
AI summary
A method for improving device-to-device (D2D) communication in an LTE-Direct communication system includes exchanging communication information between a first user equipment (UE) and a second UE over an LTE-Direct connection with a first network resource of a first set of network resources allocated to the first and second UEs by a base station for the LTE-Direct connection. The method also includes determining, by the first UE, whether a first link quality of the LTE-Direct connection with the first network resource is below a link quality threshold. If so, the LTE-Direct connection is shifted to another network resource of the first set of network resources until an LTE-Direct connection is established that has a link quality that is equal to or greater than the link quality threshold.