Resource Allocation in Cluster based Ultra Dense Network
Seong‐Jung Kim, Jeong Gon Kim · 2020
In 5G, as mobile phones, IoT(Internet of Things) devices, and mobile subscribers increase, data demand increases. UDN(Ultra Dense Network) environments are used to meet the ever-increasing data demands. However, because the cell range is smaller and densely arranged, interference increases in UDN. The existing CLA(Cell Load Aware)-CoMP(Coordinated Multi Point) scheme does not take into account the subcarrier allocation scheme, and thus there is a problem in that interference increases when UE(User Equipment) in adjacent distances use the same subcarrier. In this paper, we use a subcarrier distribution scheme using a location-based clustering scheme in a joint CoMP communication system environment to reduce interference in UDN. To allocate frequency resources, the SBS(Small Base Station) is first configured as a cluster using the k-means algorithm in the UDN environment. After each cluster is calculated and the interference SBS matrix is created. Sum-rate is increased by allocating different subcarriers between the interference SBS of the matrix. After allocating subcarriers, power proportional to the channel is allocated to each subcarrier to increase the sum-rate.