An Optimized Algorithm for Resource Allocation for D2D in Heterogeneous Networks

With the emergence of 5G mobile multimedia services,end users’demand for high-speed,low-latency mobile communication network access is increasing.Among them,the device-to-device(D2D)communication is one of the considerable technology.In D2D communication,the data does not need to be relayed and forwarded by the base station,but under the control of the base station,a direct local link is allowed between two adjacent mobile devices.This flexible communicationmode reduces the processing bottlenecks and coverage blind spots of the base station,and can be widely used in dense user communication scenarios such as heterogeneous ultra-dense wireless networks.One of the important factors which affects the quality-of-service(QoS)of D2D communications is co-channel interference.In order to solve this problem of co-channel interference,this paper proposes a graph coloring based algorithm.The main idea is to utilize the weighted priority of spectrum resources and enables multiple D2D users to reuse the single cellular user resource.The proposed algorithm also provides simpler power control.The heterogeneous pattern of interference is determined using different types of interferences and UE and the priority of color is acquired.Simulation results show that the proposed algorithm effectively reduced the co-channel interference,power consumption and improved the system throughput as compared with existing algorithms.

Analysis and Assessment of Wind Energy Potential of Socotra Archipelago in Yemen

The increasing use of fossil fuels has a significant impact on the environment and ecosystem,which increases the rate of pollution.Given the high potential of renewable energy sources inYemen and the absence of similar studies in the region,this study aims to examine the potential of wind energy in Socotra Island.This was done by analyzing and evaluating wind properties,determining available energy density,calculating wind energy extracted at different altitudes,and then computing the capacity factor for a number of wind turbines and determining the best.The average wind speed in Socotra Island was obtained from the Civil Aviation and Meteorology Authority data,only for the five-year data currently available.The results showed high wind speeds from June to September(9.85-14.88 m/s)while the wind speed decreased for the rest of the year.The average wind speed in the five years was 7.95 m/s.The average annual wind speed,wind energy density,and annual energy density were calculated at different altitudes(10,30,and 50 m).According to the International Wind Energy Rating criteria,the region of Socotra Island falls under Category 7 and is classified as‘Superb’for most of the year.This study provides useful information for developing wind energy and an efficient wind approach.

An Optimized Algorithm for D2D-MIMO 5G Wireless Networks

The device-to-device(D2D)networking technology is extended to the conventional cellular network to boost the communication efficiency of the entire network,forming a heterogeneous 5G and beyond(B5G)communication network.D2D communication in a cellular cell will boost the efficiency of the spectrum,increase the ability of the device,and reduce the communication burden of base stations through the sharing of approved cell resources,causing serious interference as well.The device-to-device(D2D)networking technology is extended to the conventional cellular network to boost the communication efficiency of the entire network,forming a heterogeneous 5G communication network.D2D communication in a cellular cell will boost the efficiency of the spectrum,increase the ability of the device,and reduce the communication burden of base stations through the sharing of approved cell resources,causing serious interference as well.This paper proposes an efficient algorithm to minimize interference,based on the parity of the number of antennas,to resolve this issue.The primary concept is to generate the cellular connection precoding matrix by minimizing the power of interference from the base station to non-targeted receivers.Then through the criterion of maximum SINR,the interference suppression matrix of the cellular connection is obtained.Finally,by removing intra-interference through linear interference alignment,the maximum degree of freedom is obtained.The results of the simulation show that the proposed algorithm efficiently increases the performance of the spectrum,decreases interference,improves the degrees of freedom and energy efficiency compared to current algorithms.