D2D Radio Resource Control for Cellular Interference
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Solution Overview
Problem
In mobile communication systems, the allocation of radio resources for Device-to-Device (D2D) communication often leads to reduced resources for cellular communication and increased interference, or inefficient utilization of D2D communication due to inadequate resource allocation.
Innovation Solution
A network device and communication control method that dynamically adjust D2D radio resources based on traffic amounts, Quality of Service (QoS) levels, and time zones to ensure an appropriate allocation, optimizing resource usage and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If radio resources are allocated for D2D communication, then D2D communication capability is improved, but radio resources available for cellular communication are reduced
Solution Approach 1:
The patent implements dynamic adjustment of D2D radio resources based on traffic conditions. The base station monitors traffic amounts and QoS requirements, then adjusts the quantity of radio resources allocated to D2D communication in real-time. This allows the system to adapt resource allocation to current network conditions, ensuring D2D communication capability is improved only when necessary, thereby preserving radio resources for cellular communication during normal operation.
Solution Approach 2:
The patent changes the parameter of radio resource allocation by adjusting the amount of resources dedicated to D2D communication based on traffic conditions and QoS levels. When traffic amount exceeds thresholds or QoS requirements are not met, the system increases D2D radio resources; otherwise, it reduces them. This parameter adjustment resolves the contradiction by making resource allocation conditional rather than fixed.
2Adaptability or versatility
If radio resources are allocated for D2D communication, then D2D communication capability is improved, but interference between cellular communication and D2D communication increases
Solution Approach 1:
The patent applies local quality by allocating D2D radio resources selectively based on specific conditions (traffic amount, QoS requirements) rather than uniformly across all scenarios. The base station determines which user terminals should engage in D2D communication and allocates resources locally to those specific terminals only when necessary, thereby minimizing the spatial and spectral footprint of D2D transmissions and reducing interference to cellular communication in other areas.
Solution Approach 2:
The system dynamically adjusts the allocation of radio resources to D2D communication based on real-time monitoring of traffic conditions and QoS requirements. When conditions warrant D2D communication, resources are allocated; when they don't, resources are released back to the cellular pool. This dynamic approach ensures D2D capability is maintained when needed while minimizing interference during periods when D2D is not active.
3Quantity of substance
If radio resources for D2D communication are reduced, then radio resources for cellular communication are preserved, but effective utilization of D2D communication becomes difficult
Solution Approach 1:
The patent implements a dynamic resource allocation mechanism that monitors traffic amounts and QoS requirements to determine when D2D communication should be active. When traffic exceeds certain thresholds or QoS requirements are not met, the system automatically increases D2D radio resources to ensure effective utilization. This resolves the contradiction by making resource allocation responsive to actual communication needs rather than maintaining a fixed low allocation.
Solution Approach 2:
The system employs feedback mechanisms where the base station monitors traffic conditions, QoS requirements, and communication effectiveness. Based on this feedback, the base station adjusts the allocation of D2D radio resources accordingly. When feedback indicates that D2D communication is not being effectively utilized due to insufficient resources, the system increases resource allocation. This feedback loop ensures that D2D resources are preserved during normal operation but expanded when needed for effective utilization.
Data Source
AI summary
A network device that is used in a mobile communication system that supports cellular communication in which a data path passes through a core network, and D2D communication that is direct device-to-device communication in which a data path does not pass through the core network, comprises: a control unit that sets a D2D radio resource that is ensured for the D2D communication from radio resources be available to the mobile communication system. The control unit changes an amount of the D2D radio resource such that the D2D radio resource reaches an appropriate amount.