D2D Resource Pool Segmentation for Interference Control
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Solution Overview
Problem
Current wireless communication networks face challenges in supporting device-to-device (D2D) communication, particularly in ensuring Quality of Service (QoS) and reducing interference, as existing solutions like CSMA-like based resource allocation can degrade system performance and are not effectively managed by the network.
Innovation Solution
The method involves a UE receiving a message from an eNB for a first common resource pool and being configured with a second resource pool, different from the first, allowing the UE to select resources using a CSMA-like mechanism for D2D transmission, ensuring QoS by establishing a direct communication path that is not shared with other UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If CSMA-like based resource allocation is used for D2D communication, then resource allocation flexibility is improved, but system performance deteriorates and interference increases
Solution Approach 1:
The resource pool is divided into two distinct parts: common resources (first resource pool) that are shared by multiple UEs, and dedicated resources (second resource pool) that are specifically allocated to individual UEs. This segmentation allows the system to combine the flexibility of common resource sharing with the performance benefits of dedicated resource allocation, resolving the contradiction between resource allocation flexibility and system performance.
2Productivity
If common resources are shared by multiple UEs, then resource utilization efficiency is improved, but interference increases and QoS cannot be guaranteed
Solution Approach 1:
By segmenting the resource pool into common and dedicated portions, the system allows multiple UEs to efficiently share common resources while providing dedicated resources to specific UEs that require guaranteed QoS and are sensitive to interference. This resolves the contradiction between resource utilization efficiency and interference reduction.
Solution Approach 2:
Different quality levels of resource allocation are provided to different UEs based on their specific needs. Some UEs receive common resource allocation for general traffic, while others receive dedicated resource allocation for services requiring guaranteed QoS. This local differentiation resolves the contradiction between efficient resource sharing and interference management.
3Reliability
If dedicated resources are allocated to individual UEs, then QoS is improved and interference is reduced, but resource allocation complexity increases
Solution Approach 1:
The resource pool is segmented into common and dedicated portions, allowing the system to provide QoS guarantees through dedicated resources only when necessary, while using simpler common resource allocation for other UEs. This segmentation reduces overall allocation complexity compared to providing dedicated resources to all UEs, while still maintaining QoS where needed.
Data Source
AI summary
A method of a UE being served by a eNB for supporting device to device (D2D) communication is disclosed. The method includes the UE receiving a message that includes information pertaining to a first resource pool provided by the eNB, wherein resources of the first resource pool are common resources shared by more than one UE using the first resource pool. The method further includes the UE being configured with a second resource pool provided by the eNB, wherein the second resource pool is different from the first resource pool. Furthermore, the method includes the UE selecting resource(s) from the second resource pool and uses the selected resource(s) for D2D transmission.