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CWLab Backhaul Bash: Testing &
Analysis Criteria
The
Backhaul Bash provides an objective 3rd party
comparative analysis and review on the performance
capabilities of the broadband wireless backhaul and
bridging solutions available on the market today.
Presentation material gives an in-depth and comparative
"nuts-and-bolts" view of "the good, bad & ugly" of each
system. Each backhaul system reviewed undergoes
the following implementation scenarios and comparative
testing criteria:
Physical Implementation Analysis Criteria
- Outdoor (PoE) vs. Split (IF) vs. Indoor (Coax)
- Radio Connectors (Output / Input)
- Mounting Methods (Threaded / U-bolts)
- Alignment Aids (LED / Audio / RSSI)
- Power (120 VAC / DC)
- Recovery Capabilities (Hard vs Soft)
RF PHY Analysis Criteria
- PHY (Single Carrier vs OFDM 11a vs OFDM+)
- Channel Bandwidth (MHz)
- Frequency of Operation (2.4, 4.9, 5.3, 5.4, 5.8)
- Enhanced PHY Characteristics
MAC Layer Analysis Criteria
- Duplexing (Frequency/ Adaptive Time / Fixed
Time)
- IEE 802.3 (Flow Control / Bandwidth Shaping /
QoS)
- Error Correction (ARQ, Adaptive Modulation)
- Additional MAC Characteristics
- Enhanced Layer 3 Functionality
Operational Analysis Criteria
- Channel Resolution (1, 5, 10, 20 MHz)
- TPC (Manual & Automatic)
- Encryption Support
- ACCS / DFS
- Configuration Rollback
- Additional Operational Characteristics
Management Analysis Criteria
- Management Access (TelNet, Web, Client,
Serial, SNMP)
- Access Levels
- Firmware Storage (Multi / Single)
- System Diagnostics & Reporting
- Spectrum Analysis Tools
- System Analysis Tools
- Additional Management Characteristics
Performance Testing Criteria
- Test #1: 1 Way RTT (100 pps)
- Test #2: 1 Way TCP Max (Iperf)
- Test #3: 2 Way Bidirectional TCP Max (Iperf)
- Test #4: RTT Under 1 Way TCP Max (100 pps / Iperf)
- Test #5: RTT Under 2 Way TCP Max (100 pps / Iperf)
- Test #6: RTT Under 1 Way Sustained 5 Mb UDP
Bitstream
- Test #7: RTT Under 2 Way Sustained Bidirectional 5
Mb UDP Bitstream
Performance Testing Scenarios
| Situation
|
RSSI |
Noise Floor |
Impulse Noise |
| Indoor Lab
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N/A
| -100 dBm |
-100 dBm |
| 5 Mile LoS
| -60 to -65
dBm | -85 dBm |
-75 dBm |
| 10 Mile LoS
| -65 to -70
dBm | -80 dBm |
-75 dBm |
| 27 Mile LoS
| -72 to -76
dBm
| -80 dBm |
-75 dBm |
| 5 Mile Urban NLoS
| Situational |
-80 dBm | -75
dBm |
Backhaul Bash: Radios Reviewed
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