Backhaul (B-Series) Training
By: Clint Salvador
@GoMimosa
Mimosa Networks
Product Overview
Fiber Speeds at Wi-Fi Costs
C5
A5
B5/B11
Optical
Backbone
Regional
Fiber
B5/B1
1
Point-to-Multipoint
Point-to-Point
C5
C5
G2
G2
Metro
Fiber
G2
Cloud
Backhaul
Access Point
Clients
Wi-Fi
B5
A5
C5
G2
Mimosa Backhaul Products
Product
B5
B5c
B5-Lite
B11
25 dBi parabolic
±4˚ beam H/V
Connectorized
Dual female N
connectors
20 dBi parabolic
±7˚ beam dual slant
19mm Waveguide
Feed
600/900/1200 mm
34-40 dBi
Antenna
Power
30 dBm*
30 dBm*
20 dBm*
27 dBm
Spectrum
5.15-5.85 GHz*
4.9 – 6.2 GHz*
4.9 – 6.2 GHz*
10 – 11.7 GHz*
Wireless
4x4:4 TDMA
GPS sync
Up to 1.5 Gbps
4x4:4 TDMA
GPS sync
Up to 1.5 Gbps
2x2:2
750 Mbps +
4x4:4
GPS sync
Up to 1.5 Gbps
* Subject to country specific regulatory limits and use restrictions
Power over Ethernet Adapter
Pin-out may vary from other POE’s
Power pins: 3,4,5,6
Ground pins: 1,2,7,8
B5/B5c accepts wide range of inputs
56 V output on power pins
Internal diode bridge to rectify power
B5/B5c only requires 48 V
90 V GDTs for lightning protection
Protection for both Ethernet ports
B5/B5c Power Inputs
http://help.mimosa.co/backhaul-faq-non-mimosa-poe
Protocol & Performance
Dashboard PHY and MAC Performance
TDMA (Timing Based Protocol)
Alternating Tx Slots (local/remote)
Configurable Performance
Transmit Window: 2/4/8 ms
Traffic Splits: 50/50, 75/25, 25/75, or
Auto
Format: (Local Tx / Remote Tx)
19
Transmit Window & Traffic Splits
50%
50%
Gender A
Transmit
Receive
Gender B
Receive
Transmit
Time
75%
25%
Gender A
Transmit
Receive
Gender B
Receive
Transmit
Time
Calculating Layer 2 (MAC) Throughput
Tx MAC Throughput = Tx PHY rate * Tx MAC duty cycle * MAC efficiency
Rx MAC Throughput = Rx PHY rate * Rx MAC duty cycle * MAC
efficiency
MAC Duty Cycle
TDMA Window
MAC Efficiency
75%
8 ms
90%
50%
4 ms
80%
25%
2 ms
70%
Layer 2 (MAC) Throughput Example
Tx MAC Throughput (Mbps) = 1560 * 50% * 80% = 624 Mbps
Rx MAC Throughput (Mbps) = 1300 * 50% * 80% = 520 Mbps
TCP/UDP Throughput (Layer 4)
UDP performance similar to Layer 2
TCP slower due to protocol overhead
Limiting Factors
RF Interference / Retries
Varying packet size
Network bottlenecks
QoS rules
Server congestion
Calculating Latency
Latency specified across link (one direction at Layer 2)
Configurable, and a function of TDMA Transmit Window (2/4/8 ms)
ICMP is how we test latency (ping RTT at Layer 3)
RF interference and transmit retries increase latency
Estimating average latency with design margin (assuming retries)
1-Way Latency (ms) = 1.25 * TDMA Window Size (ms)
Round Trip Time (ms) = 2.5 * TDMA Window Size (ms)
http://help.mimosa.co/backhaul-faq-link-latency
TDMA-FD
Clean Spectrum Example
Ecuador
“Challenging” Spectrum
Access Point
Station
TDMA-FD (Frequency Diversity)
AP
Solves Tough Spectrum Challenge
AND Supports Re-use (GPS Sync)
Tx
Channel 1
Rx
Rx
Channel 2
Tx
STA
Frequency Diversity (FD) Controls
Transmit
Frequency
AP Power
Receive
Frequency
STA Power
Dashboard Indicators in FD Mode
Confidential 30
Collocation and
Synchronization
48 Satellites for
Positioning and
Timing
32
TDMA Gender
A or B
Collocation in Action
Link 2
Link 1
A
B
B
Channel Set 2
A
Channel Set 2
Tx
Rx
Tx
Rx
Collocation Site
Importance of Uniform Traffic Split
50%
50%
Gender A
Transmit
Receive
Gender B
Receive
Transmit
Time
75%
25%
Gender A
Transmit
Receive
Gender B
Receive
Transmit
Time
Importance of Uniform Traffic Split
50%
50%
Gender A
Transmit
Receive
Gender B
Receive
Transmit
Time
50%
50%
Gender A
Transmit
Receive
Gender B
Receive
Transmit
Time
Collocation Interference
B
B
A
A
Four Non-Overlapping Patterns
Four per tower at 0, 85,
165, and 245 at
maximum performance
Geography dictates
possible angles
Additional radios can
be added at tolerated
drop in SNR /
throughput
Can I collocate with other
operators using Mimosa
gear?
Site Survey (20 Seconds)
•
•
•
Only AP’s send beacons that show up in Site Survey Results
High Signal Strength could indicate that AP’s are in close proximity
Note and match TDMA Parameters with collocated radios if sharing frequencies
http://mimosa.co/home/Products/Backhaul/TDMA
Dual Link
Dual Link
Auto Everything
Auto Everything
Adjust link settings to optimize throughput
Channel(s)
Channel width
Transmit power
Data Used for Decisions
Available channels and power in compliance
with regulatory restrictions
Packet Error Rates (PER)
Noise data from spectrum analysis
Site Surveys before channel changes to avoid
interfering with other Mimosa AP's
Confidential 50
Time Scale for Changes
Channel changes: 8-12 minutes (2 minutes
with high PER)
Channel width reduction: 2 minutes
Hysteresis applied to limit subsequent
changes
Confidential 51
B5 First Time Setup
B5c Bench Test
Type N Male to RP
SMA Female
Adapters (x4)
RP SMA
Jumpers (x2)
50 Ohm, 30 dB
Attenuators (x2)
Tx Power:
-1 dBm / Channel
B5 Setup Steps
Download the latest firmware image (http://mimosa.co/firmware)
Log in to http://cloud.mimosa.co to obtain an unlock code
Connect the PoE to the Radio and wait for it to boot up
Access the radio in a browser at 192.168.1.20
Follow the prompts to upgrade firmware, unlock, enter a password, and login
Configure the radio:
Assign a friendly radio name
Configure the radio’s IP address
Set the SSID and Passphrase
Select the operating frequencies, channel width, and Tx Power
(Select the largest channel width in spectrum with least interference)
All Firmware
http://mimosa.co/firmware
Click
Download Backhaul Firmware
http://backhaul.help.mimosa.co/b5-firmware
Download
Select
http://cloud.mimosa.co
Log In
Sign up
Mimosa Cloud Applications
Click
Mimosa Cloud Applications
1
Enter Serial Number on Cloud
2
3
Copy Unlock Code from Cloud
Paste Unlock Code on Radio
Copy
20-0123-4567
Enter
BQP-1T6-DER
Paste
What Does Unlock Do?
Benefits
Genuine Product Assurance
Regulatory Compliance
Automatic Warranty Registration
Free Remote Management
Theft Deterrent
B5 Log In Screen
http://192.168.1.20
Log In
Assign Friendly Name to AP
192.168.1.20/general
Set IP Address
192.168.1.20/management
Configure the SSID and Passphrase
192.168.1.20/link
Select Channel & Power
192.168.1.20/#wireless.channelpower
Dashboard Link Indicators
How does the Tx power per
chain relate to total Tx power?
Channel & Power Settings
Dashboard Tx Power Math (mW)
Total Tx Power
(mW)
Power Per Channel
mW ÷ 2
Power Per Chain
mW ÷ 4
Radio
Channel
1
Chain 1
Chain 2
=
Channel
2
Chain 3
Chain 4
7
Dashboard Tx Power Math (dBm)
Equal Power Example
Total Tx Power
20 dBm
20
Per Channel
20-3 dBm
Per Chain
17-3 dBm
17
14
=
14
17
14
14
Manage
Where can I find
documentation and get more
help?
help.mimosa.co
Confidential 79
How to Contact Us
Group
Email Address
Sales
sales@mimosa.co
Support
support@mimosa.co
Everything Else
inquiry@mimosa.co
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