Transcript IP Considerations: What to Consider When Implementing IP

IP Considerations:
What to Consider When Implementing IP Solutions
1
Why IP Video?
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Uses existing infrastructure (network wiring)
Lower install cost (CAT 5/6 vs. Coax)
Easily expandable/scalable
Devices are nodes on the network
Ties analog and digital worlds together
Easier to store and distribute images
Remote viewing
Can be supported by IT
Lower operational costs and ease of use
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Basics
IP Cameras, IP Servers and ViconNet
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An IP camera is a professional CCTV camera that connects directly to the
network using a network cable.
An IP Server is a device that accepts an analog video signal (from single to
several) and converts it to ViconNet digital format and connects to the
network using a network cable.
Each camera/server has its own unique IP address and is identified in the
ViconNet system as a video transmitter in the same way as a DVR.
Once the camera is set up, all viewing and control operations are done from
the ViconNet application.
What is the maximum number of clients that can connect to an IP
camera?
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1 IP camera can support viewing/recording to up 10 workstations
simultaneously.
1 IP server can support viewing/recording to up 10 workstations
simultaneously.
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
SurveyorVFT
IP (SD and HD)
V960D
VN-301T
Roughneck
KTX-4
Camera
Options
Optional all
SVFT models
Fixed with
variable lens
Any
analog in
Optional on
V910 cameras
Any
Analog in
Maximum
FPS
30 fps
30 fps
30 fps
30 fps
120 fps
Alarm In
4
1
1
4
2
Audio In
1 channel
1 channel
1 channel
1 channel
2
channels
PTZ
Control
Local camera
No
Yes
No
Yes
Camera In
Local only
Local only
1
Local only
4
Analog
Output
No
Yes
No
No
No
Availability
Now
Now
Now
Now
Now
Network Design Parameters
Issues to consider when designing a network for an IP Video system:
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How many cameras can connect to a single network switch?
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How many network switches can be cascaded and in what manner?
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When and how should we use a 1000 Mbps (1 Gbps) switch?
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How many cameras can be viewed/recorded on a single workstation?
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Bandwidth = Traffic
 A road can handle only so many cars. A network can
carry only so many bits.
 To move more cars, we need more lanes. To move
more bits, we need more bandwidth.
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Kollectors vs IP Cameras:
 When using a Kollector DVR:
– Maximum FPS – According to Kollector type and divided between its
cameras; for example, a Kollector Strike 120 fps will generate 120 fps
with 4, 5 or 16 cameras.
– Local recording – Possible on Kollector and doesn’t generate network
bandwidth.
 When using IP cameras/servers:
– Maximum FPS – 30 fps per camera.
– Local recording – Not supported, has to be streamed across the
network.
 Note:
Maximum usage of network bandwidth is 70% of
total (i.e., 100 Base/T network can provide about 70
Mbps for video transportation).
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Parameters that affect bandwidth
 Resolution/Quality Used
– The higher the quality, the higher the bandwidth:
ViconNet Quality No.
Picture Resolution
1-2
720 x 488
3-4
720 x 244
5-6
360 x 244
7-8
360 x 122
 Frame Rate
– 1-30 fps per camera; higher FPS  higher bandwidth.
 Motion Type
– High motion (activity) in the picture (i.e., a casino floor) generates more bandwidth
than medium motion (i.e., an office space).
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Parameters that affect Bandwidth
 Resolution
– The higher the resolution, the higher the bandwidth:
 Frame Rate
 1-30 fps per camera; higher FPS  higher bandwidth.
 Motion Type
– Higher motion (activity) in the picture (i.e., a casino floor) uses
more bandwidth than medium motion (i.e., an office space)
– NOISE = MOTION
 Compression Format
– H.264, MPEG-4, M-JPEG have varying requirements
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Expected Bandwidth for a Single Frame
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Expected bandwidth at 30 frames per second
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Network Configuration
How many cameras can the network support?
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Assume that each camera output is 1.5 Mbps (1536 Kbps).
The output from the switch to the viewing station will be the accumulation of all
cameras.
Viewing
station
Accumulated
bandwidth from
cameras going to the
viewing station
Connecting 10, 20, or 50 cameras on the network?
- 10 cams X 1.5 Mbps (1536 Kbps) = ~ 15 Mbps
- 20 cams X 1.5 Mbps (1536 Kbps) = ~ 30 Mbps
- 50 cams X 1.5 Mbps (1536 Kbps) = ~ 75 Mbps (over 70% of a 100 Mbps switch)
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Cascading Switches
 How many network switches are needed?
 Systems with many IP cameras require multiple switches
Daisy Chain versus Star Topology
Switch
2
Which should you use?
Switch 1
Switch 2
Switch 3
Switch 4
Switch
3
Switch
1
Main
Switch
Switch
5
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Switch
4
Daisy Chain Topology
Assuming 100 Mbps switches
50Mbps
6Mbps
50Mbps
6Mbps
50Mbps
6Mbps
Too Many
18Mbps
Mbps
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Star Topology
Assuming 100 Mbps switches
50Mbps
50Mbps
50Mbps
Possibly
too many
Mbps
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Star Topology - Explanation
 Using a 1000 Mbps (1 Gbps) switch:
– IP cameras use a 100 Mbps network card
– Connecting to a 100/1000 Mbps switch will utilize
1000 Mbps (1 Gbps) going out to the PCs
– Whether the cameras can connect from smaller
switches at 100 Mpbs to central switches at 1000 Mbps
all depends on the accumulated bandwidth
Remember to make sure each and every switch has
enough bandwidth to support its in/out needs!
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Using 1 Gbps Switches
 The main switch can output 1Gbps
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Individual Streams
2 Mbps
Wireless
bridge
3X2 Mbps
≈ 6 Mbps
Wireless
access
point
– Every user gets an individual stream
from the camera.
– Data is fully acknowledged to protect
from losing information.
– Bottleneck on one viewer doesn’t
affect the others.
Switch
2 Mbps
2 Mbps
4 Mbps
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Multicasting Streams
– Each camera sends only one stream
to the network
2 Mbps
Wireless
bridge
2 Mbps
– Special switch provides a copy of the
stream to PCs who request it
– Everybody gets the same stream
regardless of their supported
bandwidth
Wireless
access
point
– Multicast is UDP and not acknowledged
Switch
2 Mbps
2 Mbps
2 Mbps
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Switch Backbone and Output
 Every switch has a certain specification
 A 16 port switch with 1Gbps ports cannot support a full
1Gbps through each port simultaneously. Its “Backbone”
is the total throughput capacity.
 The more professional the switch, the stronger the
backbone.
 High end switch systems usually connect the central
switches with a special connection or fiber to create a
central backbone.
– “Stacking” switches
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Pure Gigabit Stack
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Basic Network Design
Using a 1000 Mbps (1 Gbps) Switch:
• The ViconNet camera uses a 100 Mbps network card.
• Connecting to a 100/1000 Mbps switch will allow utilizing 1000 Mbps (1 Gbps)
PCs.
• Cameras can connect from smaller switches at 100 Mbps to central switches
at 1000 Mbps.
100Mbps
switch
100Mbps
switch
100 Mbps
100/1000Mbps
switch
1000 Mbps
Remember to make sure each and every switch has enough
bandwidth to support its in/out needs!
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Points to Remember
What are the critical design points in the network?
 Evaluate the expected bandwidth from each camera.
– keep in mind the number of concurrent users per camera.
 Each switch’s output (to the next switch or NVR) must not exceed
70% of maximum bandwidth.
 Using the Star topology, add central switches with higher bandwidth.
 Remember, every port on the switch has its own bandwidth, so if
two workstations are connected to two different ports, each has its
own 100 or 1000 Mbps.
 In very high traffic network, invest in a strong central stack of
switches with a strong backbone.
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Rules of Thumb for System Design
 Nucleus
– Any system over 5 devices (DVRs, IP cameras, IP servers) must have a
dedicated PC used as the Nucleus.
 NVR
– VN-NVR product or similar PC running VN1000V3.
– Record up to 25 cameras (over the network).
– For better performance, the NVR should be dedicated to recording and
not used for display at the same time.
 Kollector Force or Strike
– Can record up to 8 network cameras on top of its own 16 direct ones.
– If the Kollector is used for display, it’s recommended not to use it to
record additional IP cameras.
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
System Design Example
 Design a System with the Following:
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100 IP cameras
5 viewing stations
24/7 recording of all cameras
On average, 3 users will be using each camera at any given time
 Assumptions:
– Each video stream is ~ 1.5 Mbps
– Viewing stations have 1 Gbps network cards
This information is confidential and is not to be provided to any third party without Vicon Industries Inc.’s prior written consent.
Cam 1 -15
100 Mbps switches
3 user @ 1.5 Mbps each
~70 Mbps sent to the central switch
VN-NVR recording PCs
Input ~ 25 cameras x 1.5 Mbps each
= 37.5 Mbps each
Record
cam 1-25
Cam 16 -31
Cam 32 -47
100/1000 Mbps switch
Input ~7 switches x 70 Mbps = 490 Mbps
Record
cam 26-50
Record
cam 51-75
Cam 48 -63
Cam 64 -79
Record
cam 76-100
Cam 80 -95
Nucleus
Cam 96 -100
5 Viewing Stations
16 cameras x 1.5 Mbps each
= 24 Mbps each