Presentation on theme: "Resource Sharing Optimization for Device-to-Device Communication Underlaying Cellular Networks."— Presentation transcript:
Resource Sharing Optimization for Device-to-Device Communication Underlaying Cellular Networks
System Model This paper assumes that the BS selects the resource allocation mode. This paper considers the case where one cellular user (UE1) and two D2D users (UE2 and UE3) share the radio resources.
Three Resource Allocation Modes Non-Orthogonal Sharing mode (NOS): D2D and cellular users re-use the same resources, causing interference to each other. Orthogonal Sharing mode (OS): D2D communication gets part of the resources and leaves the remaining part of resources to the cellular user. There is no interference between cellular and D2D communication. Cellular Mode (CM): The D2D users communicate with each other through the BS that acts as a relay node. Note that this mode is conceptually the same as a traditional cellular system. We optimize the transmission in all of these modes, to understand what can be optimally reached in a D2D system based on NOS, on OS, or on CM.
Resource Allocation Mode Selection
Numerical Results D L
Averaged Rate Ratio between sum rate from the best resource allocation and from the cellular mode
Manhattan grid environment with four WINNER II A1 ofce buildings.
Pathloss-based selection In pathloss-based selection, only two modes are considered: non-orthogonal resource sharing and cellular mode. If the path loss between the D2D pair is less than the minimum of the path losses between the D2D users and the BS, non-orthogonal resource sharing is used. Otherwise, cellular mode is used.
Cell throughput distributions Our proposed scheme (Opt. sel.), pathloss-based selection (PL sel.), and pure cellular mode (CM) are considered.