垂直切换的仿真(终).doc

异构网垂直切换的Matlab仿真 异构网中的切换的仿真： 以下为基本的网络图： 涉及到的仿真包括： 接收信号的强度的设计。 大尺度衰落：路径损耗和阴影效应(ShadowGenerate.m)。 切换的变化： 2.考虑到小尺度衰落的信号接收的变化： 切换的变化： 3.同时考虑到阴影效应下的接收信号强度变化： 切换的变化： 仿真3的源代码： 1.Main.m %% the simulation of this program is for heterogeneous %% %% network in vertical handoff; %% %initial the parameters of network clear clc global fc_LTE fc_Wimax LTE_BS_coordinate Wimax_BS_coordinate ... Wimax_BS_coordinate LTE_BS_coordinate large_scale_time_interval... large_scale_LTE large_scale_wimax large_scale_time_start... large_scale_time_end N service_type=0; %the subscriber type of service %0 refers to real time service,on the % contrary,1 refers to nonreal-time service large_scale_time_interval=100; N=10; large_scale_time_start=0; large_scale_time_end=large_scale_time_interval; large_scale_LTE=ShadowGenerate(3,0.5,N); large_scale_wimax=ShadowGenerate(3,0.5,N); MS_coordinate=[100,0]; LTE_BS_coordinate=[0,0]; %the coordinate of LTE BS Wimax_BS_coordinate=[600,0]; %the coordinate of wimaxE BS MS_speed=10; %the speed of mobile station fc_LTE=2000*10^6; %the frequency of the carrier for LTE fc_Wimax=2500*10^6; %the frequency of the carrier for Wimax Net_state=0; %0 refers to LTE;1 refers to Wimax handoff_drop=1; handoff_clock=0; count_handoff_number=0; Tc=0.4; %time of measure interval record_time=0; %record the number of interval time of system countinue_run=true; while countinue_run %################# measure the receieved signal strength ############ %if the mobile station is in the LTE network if is_in_LTE_coverage(MS_coordinate) RSS_LTE=calculate_RSS(MS_coordinate,MS_speed,LTE,record_time*Tc,Tc); else RSS_LTE=-inf; end %if the mobile station is in the LTE network if is_in_Wimax_