wiki:Manual/Scenario/OFDMA/output

You are here: Manual / Introduction / OFDMA Results

TracNav


OFDMA output results description

The results of the OFDMA simulation are given in terms of capacity/throughput loss of the OFDMA victim. Figure 14 presents an overview of the simulation results. The window has been divided in 4 areas.

  • # 1 presents the evolution of the achieved bitrate in the reference cell per snapshot (or event),
  • # 2 presents the evolution of the achieved bite rate for the whole system per event.
  • # 3 allows the user to extract various vectors for post analysis. These vectors are for the achieved bitrate (with or without external interference) and the cell capacity (i.e. the number of active users per cell) with or without interference for the reference cell or the whole system .
  • # 4 presents a summary of the average of the capacity and bit rate loss expressed in percentage for both the reference cell and the entire OFDMA network (i.e. the whole system). The percentage calculation is performed for each snapshot and the mean of the percentage over all the snaphsots is deduced.





Elements # 1 to # 6 of Figure 15 are shared components from the CDMA module. Component #6, presents the user with a flexible access to vector results of the OFDMA module, so that users are able to probe various elements of the simulation.

# item description
1 Total users Number of active users
2 Connected Users [active/inactive] In OFDMA there is not inactive users (this is a shared component with CDMA). All users are active.
3 Dropped users Number of droped users (Note: the purpose of the OFDMA is to look at the bitrate/throughput loss and not to look at the number of dropped users, but it is possible to drop users depending on the input set-up.)
4 Selected system The user can choose to visualise either the victim or the interfering system which has been simulated. When the user select the victim system, it is also possible to see the position of the interferer
5 Selected sector As in CDMA, selecte the beam of interest (for vixualisation purpose only)
6 Calculated pathloss Raw parthloss for all the active links (i.e. active UE to ist serving BS)
7 Distance to first BS Distance from UE to its serving BS (first refer to cases where tri-sector is active)
8 Effective Pathloss to Ext. interferer (all victims, all interefers) Effective pathloss between all the victims and all the external interferers
9 Effective pathloss, active links Effective pathloss between all the victims and there respective serving BSs. Results of the below equation for all the active links
10 External interference –blocking (all victims – all interferers) iRSSblocking for each of the victim UE interferered by each interferer
11 External interference –unwanted (all victims – all interferers) iRSSunwanted for each of the victim UE interferered by each interferer
12 External interference –blocking (all victims) Aggregate external interference iRSSblocking for each of the victim UE. Sum over all the interferers
13 External interference –unwanted (all victims) Aggregate external interference iRSSunwanted for each of the victim UE. Sum over all the interferers
14 External interference, all cells Sum of the iRSSblocking and iRSSunwanted at each victim cell
15 Frequency mobiles Vector of the frequency of the UE (in UL) for each active link
16 Inter System Interference Evaluate
17 Rx power, active links Received power at the victim serving BS (UL) or active UE (DL) from its own system (used for investigating the inter-system interference from other cells)
18 Size of active list Size of active list
19 Tx power external interferers Tx power from the interferer
20 Tx power, active users Tx power from its own system

Table 5: Output results for UL.

Note that for the position information (x,y) of the active UE details, all coordinates are always shown in the SEAMCAT coordinate system which by definition either the WT or the victim reference cell in (0,0). Therefore, the position of the elements of an interfering CDMA or OFDMA system is based on the victim reference cell and not its "internal" reference cell.

# item description
1 Achieved SINR, active users (ref cell) Achieved SINR in the ref cell only
2 Achieved SINR, active users (all cells) Achieved SINR for the all system
3 Achieved bitrate, active users (all cells) Achieved bit rate for the all system

Table 6: Output results for DL (the rest of the vectors are like for the UL).

Attachments