D2D Resource Allocation via UE Interference Feedback
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Solution Overview
Problem
Existing cellular networks lack information about interference caused at receiving user equipment capable of D2D communication and path loss between cellular user equipments and receiving user equipment, which hampers efficient resource allocation for D2D communication.
Innovation Solution
User equipment performs measurements on reference signals transmitted by other user equipment and reports the results to the radio network node, enabling the node to configure optimal resource allocation and manage interference, thereby improving D2D communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D communication is enabled in existing cellular networks, then new communication capabilities are provided, but interference management becomes difficult due to lack of information about interference and path loss
Solution Approach 1:
The patent implements a feedback mechanism where user equipment performs measurements on reference signals from other user equipment and reports the measurement results (including interference levels and path loss) to the radio network node. This feedback loop enables the network to obtain necessary information for D2D resource allocation without requiring direct measurement capabilities at the network side, thus resolving the information loss problem while maintaining D2D communication capability
Solution Approach 2:
The patent introduces user equipment as an intermediary that performs measurements and reports results to the network. Instead of requiring the radio network node to directly measure interference and path loss (which is impossible), other user equipment act as intermediaries to collect and report this information, enabling the network to make informed resource allocation decisions for D2D communication
2Productivity
If resource allocation for D2D communication is implemented without measurement information, then D2D communication can proceed, but harmful interference increases and network performance deteriorates
Solution Approach 1:
The patent implements preliminary action by having user equipment perform measurements on reference signals before D2D resource allocation is finalized. The measurement results (interference and path loss information) are reported to the network in advance, allowing the network to pre-calculate optimal resource allocation that minimizes harmful interference while maintaining D2D communication productivity
Solution Approach 2:
The feedback mechanism allows the network to continuously monitor interference conditions through user equipment measurements and adjust resource allocation accordingly. This real-time feedback enables the system to maintain high D2D throughput while dynamically controlling harmful interference levels based on actual network conditions
3Productivity
If measurement and reporting procedures are added to assist resource allocation, then resource allocation efficiency improves, but device complexity and energy consumption increase
Solution Approach 1:
The patent leverages existing multi-functionality of user equipment by using the same measurement capabilities already present for cellular communication (measuring reference signals from other user equipment). The measurement and reporting procedures reuse existing infrastructure and protocols, avoiding the need for specialized dedicated hardware or complex new procedures, thus improving resource allocation efficiency without significantly increasing device complexity
Solution Approach 2:
The patent implements self-service by enabling user equipment to autonomously perform measurements and generate reports without requiring complex network coordination or additional processing. The devices themselves service the information collection function, reducing the burden on network infrastructure and minimizing the complexity overhead while maintaining high resource allocation efficiency
Data Source
AI summary
Embodiments herein relate to a user equipment and a radio network node, as well as to methods therein. The method in the radio network node relates to the control of resource allocation for D2D communications in a communications network. The network comprises the network node, a first user equipment, UE, and a second UE, wherein at least one of the first and second UEs is a first D2D capable UE. The method comprises configuring the second UE to transmit a reference signal; transmitting configuration information relating to the second UE to the first UE; receiving a measurement result of the measurement being performed by the first UE on the transmitted reference signal; and performing one or more radio operation task for a D2D communication between the first D2D capable UE and a second D2D communication capable UE based on the measurement result.