Traffic Generations
DuoSIM Manger offers a series of procedure oriented testing tools for C/U-plane performance evaluation. One of the most critical procedures for LTE eNB evaluation is RACH preamble. There are 64 possible preamble sequences in one radio subframe, and UE-SIM is capable of generating any types of the sequences to provide a complete RACH preamble testing (Figure 1). DuoSIM can also generate critical conditions with micro bursty traffic on most, if not all, of important procedures on Uu and S1/X2 interfaces.
In terms of macro traffic stand point, Load Scheduler (Figure 2) is a powerful tool to discover unpredictable problems that arise only in real traffic conditions, caused by resource (memory/radio resource table/connection table) leaking and unexpected process priorities in protocol stack. Statistic information is most important to understand the network performance. All the counts on C-plane and U-plane can be captured for long duration (i.e., 72 hours) and U-plane counts can be displayed per Cell, UE and Logical Channel (Table 1/2)..
| Statistic Counts | Description |
|---|---|
| Seq Start | No. of sequence started |
| Seq Comp | No. of sequence completed |
| Seq Comp Rate | Rate of sequence completed |
| Seq UnComp | No. of sequence uncompleted |
| Frm Err | No. of protocol format errors |
| UnExp Msg | No. of unexpected messages in event list |
| UnExp Evt | No. of unexpected primitives in event list |
| UnExp Id | No. of unexpected connection identifiers |
| Data Set Err | No. of errors occurred when IE reload procedure |
| Table Over | No. of connection tables exhausted |
| ConnTbl Over | No. of fails to create connection table |
| SDL Conn Ent | Count up when connection identifier created |
| SDL Conn Rel | Count up when connection identifier released |
| Global Count | Global counter in SDL can be refer from any UE on any SDL |
| Over | Statistic Counts |
|---|---|
| UE oriented (Cell/UE) |
No. of TX MAC PDUs TX MAC PDU size (byte) TX MAC PDU rate (Mbps) No. of aborted TX MAC PDUs Aborted TX MAC PDU size (byte) |
| No. of RX MAC PDUs RX MAC PDU size (byte) RX MAC PDU rate (Mbps) |
|
| No. of TX MAC PDU acknowledged No. of RX MAC PDU aborted |
|
| No. of first RX MAC PDU No. of first TX MAC PDU acknowledged |
|
| BLock Error Rate (BLER) (No. of retransmission of hybrid ARQ) First BLER (No. of 1st retransmission of hybrid ARQ) |
|
| No. of TX RACH Preamble No. of RX RACH Response |
|
| No. of TX Message3 No. of TX Message3 aborted |
|
| Logical Channel (Cell/UE/Logical Channel) |
No. of TX RLC PDUs No. of TX RLC PDU size (byte) TX RLC rate (Mbps) |
| No. of RX RLC SDUs RX RLC SDU size (byte) RX RLC SDU rate (Mbps) |
|
| No. of RX RLC PDUs RX RLC PDU size (byte) RX RLC PDU rate (Mbps) |
|
| No. of TX RLC SDUs TX RLC SDU size (byte) RLC SDU rate (Mbps) |
|
| RLC buffer size (byte) No. of aborted RLC SDUs due to buffer overflow No. of aborted RLC SDUs due to buffer abortion control |
|
| No. of TX PDCP PDU TX PDCP PDU size (byte) TX PDCP PDU rate (Mbps) |
|
| No. of RX PDCP PDU RX PDCP PDU size (byte) RX PDCP PDU rate (Mbps) No. of TX PDCP PDU TX PDCP SDU size (byte) TX PDCP SDU rate (Mbps) RX PDCP SDU size (byte) RX PDCP SDU rate (Mbps) No RX PDCP aborted No. of error packet No. of PN error bit No. of PN synchronized bit error Bit error rate PN slip counter Delay (msec) |
|
| Uplink TPC | PUSCH Tx power (dBm) PUCCH Tx power (dBm) Sounding-RS Tx power (dB) |
| 