Model of frequency and time resource allocation WiMAX with taking into account the defined priorities

Model of evolution of scheduling sub-channels to improve quality of service in wimax network

“…As a result of the performed analysis, the decision has been made on the necessity of developing a mathematical model for the frequency resource planning in the downward communication channel of the WiMAX technology, formulated as the sub-channels scheduling tasks to support the guaranteed transmission speed of user's stations [9,10].…”

“…The capacity of the sub-channel of the n-th SS (R n ) represents the number of the transmitted bit per a time unit (second) and can be calculated according to the formula [9]: K -is the number of subcarriers for the data transmission on one sub-channel (for the DL FUSC sub-mode K c =48, and for DL PUSC S K =24); T RTG =105 µsis the duration of the interval of switching from reception to transmission (receive/transmit transition gap, RТG); µs -is the duration of an interval of switching from transmission to reception (transmit/receive transition gap, TRG); BLER-is the probability of the block error obtained at the expense of the HARQ mechanism (Hybrid automatic repeat request) [10].…”

Results of development of sub-channels scalable scheduling model in WiMAX network

“…represents the number of the transmitted bit per a time unit (second) and can be calculated according to the formula [9,10]: In the course of solving the task of sub-channels scheduling within the framework of the offered model it is necessary to provide calculation of the control variable ( l n x , ), defining the order of the sub-channels scheduling. According to the solved task physics the following limitation is superimposed on the control variable:…”

Development results the model distribution of troughputh in the WiMAX mesh-network

“…On the basis of the performed analysis and the stated requirements [4][5][6][7][8][9][10][11] the model for the single channel subchannels distribution is offered. The offered mathematical model is aimed at increase in the mesh-network efficiency as a whole through balancing the number of subchannels singled out for separate radio channels.…”