A15.5 OFDMA UL ALGORITHM

The following describe the OFDMA UL algorithm presented in Section ‎9.8.

For i=1:# of snapshots

1. Distribute sufficiently many UEs randomly throughout the system area such that to each cell within the HO margin of 3 dB the same number K of users is allocated as active UEs
   • Calculate the pathloss from each UE to all cells and find the smallest pathloss
   • Link the UE randomly to a cell to which the pathloss is within the smallest pathloss plus the HO margin of 3 dB
   • Select K UEs randomly from all the UEs linked to one cell as active UEs. These K active UEs will be scheduled during this snapshot
   • Note: a full load system is assumed by default, namely, all available RBs will be allocated to active UEs. And each UE is scheduled with the same number N of RBs. This behaviour can be overridden (see 9.3.6) and the system can be partially loaded, each UE is still scheduled with the same number (symbol to be inserted) of RBs.  
2. Perform UL power control 
3. Calculate UL C/I for all active UEs in all cells.
   
   • Loop over all cells from j=1 to  (the number of cells in the system area e.g. 57 for 19 sites with tri-sector antennas)
   • Loop over all active UEs from k=1 to K
   • For the k-th active UE in the j-th cell (i.e. UE_j,k ) its C/I is denoted by .

4. Determine the throughput for each UE with its C/I according to the link-to-system level mapping.

5.  Collect statistics.