Wireless Networking For Video Surveillance Guide

Author: John Honovich, Published on Feb 09, 2015

Wireless networking remains a niche for video surveillance applications. One of the key factors is that it is much different, if not harder, than deploying wireline networks.

In this guide, we break down the key elements of wireless networking for video surveillance:

  • Topology: PTP vs PtMP vs Mesh
  • Antennas: Internal vs External
  • Antennas: Omnidirectional vs Directional
  • Antennas and Gain
  • Free Space Path Loss
  • Frequencies Including Licensed and Unlicensed Ranges
  • MIMO Radios
  • Bandwidth Planning
  • Transmission Range
  • Wireless Products Specializing for Surveillance
  • Maintenance

******** ********** ******* * ***** *** ***** ************ ************. *** of *** *** ******* ** **** ** ** **** *********, if *** ******, **** ********* ******** ********.

** **** *****, ** ***** **** *** *** ******** ** wireless ********** *** ***** ************:

  • ********: *** ** **** ** ****
  • ********: ******** ** ********
  • ********: *************** ** ***********
  • ******** *** ****
  • **** ***** **** ****
  • *********** ********* ******** *** ********** ******
  • **** ******
  • ********* ********
  • ************ *****
  • ******** ******** ************ *** ************
  • ***********

[***************]

********

***** *** ***** ***** ******** ******* ********** ** *** ** surveillance, **** ******* **** ********* ** ***** *** *** ******* are ********:

*****-**-*****

ptp*****, *** **** ****** *** *****-**-***** (***) ******** *****. ** PtP ********, * ****** ***** ** *** ****** ******** ** connected ** * ****** ***** ********* ** *** ************ *******. PtP ***** *** **** ** *** ****** ************:

  • ********** *******:**** ********, *** ****** *** **** ** ******* ******* **** a ****** ******** (**** ** * ******* *** ****, *** example) ** * ************ ******.
  • ******** ********:***** ** ***** ** **** **** ** ******** ************, ********** two ********* ******** ** ********** * ********** **** ******* ** another ***** ** *** *******.

*********** ******** *** **** ***** **** ** *** ************, **** multi-mile ****** ********. **** ********* ********* ******* *** *********, **** 900 ***, ** *.* *** *.* ***, *** ******.

*****-**-**********

ptmp** *****-**-********** (****) ******** *****, * ****** ***** **** ** base *******, ********* ** *** ******* *******, **** ******** ****** transmitting ** **. *** ****** **** ** **** ****** *** be *** **** ** *** ** **** *****, ****** **** manufacturers *** ******* ****** *** *** **** ******* ** ****** higher **** ***** ******** **** ********** ******** ****** ******.

**** ** **** ** ************ ***** ******** ******* **** ** dispersed ****** *** ****, ******* ********* ***** ************, **** **** camera ******* ***** ** *** **** *******. ***** ******* ***** in **** **** * ******* ** ******* ** * ******* lot ** ****-**** ************ *******, ***** ******** ** ******* *** connected *** **** ****** ***** ********** ******* ***** *****.

**** **** ******** ********* *** *************** ** **** ***** *********** antennas (**** ** *******), ********* *** ******* ******* *** ******* in *** ********** ** ** *** ******* *********. **** ****** radios **** ***** *** ******** *********** ********.

****

mesh** * **** *******, **** ******** **** ******** ** *** or **** ***** ******, ********* **** **** *** **** *** network *******. ** *** **** *****, **** ** ******** ** another ****, ******** *** ****** ** * ***** ******. *******, if ******** ** *******, *** **** **** ** ********* ******** to ****** ****** *****, ** ******* **** *** *** ******* overload *******.

**** ****** *** ********* **** ********* **** *** ** **** models, *** **** ****-********* ** *********.

******* ** *** ***** ******* ******** ** **** ********, ** is **** ***** **** ** **** ************, *** ** *** few ************ **** **** *** ****** *** **** *** ***** failover ************.

**** ****** *** *** *** **** ** *******, ********* ** the ******** ** ***** *****, *** *** **** ** ** connecting **.

Internal ******** *** ** *******

****** ******** ***** **** ** ** ****** ** ************* **** and *** ******* **** ** **** ********** ********, ********* **** short ****** *** *** ******** *** ******** ***, *** ************.**** **** *% ** ** ******* **** *****-** *********** **% ** ***** *** **** *******.

** ****, **** ************ ***** ************ ************ *** * '*******' IP ****** ********* ** ** ******** ******** **** / ***** that ******** ******** ********.

Antenna ***** - *************** ** ***********

***** *** *** *********** ***** ** ******** ******** **** ** wireless **********: *************** *** ***********.

***************

*************** ******** ******* ****** ** *** **********. **** ***** *** familiar **** **** **** ** ******* ** ** ** ********* included **** ******** ******** *******, *** ***** "****** *****" ***** seen *****. ******* ****** ******** *** **** ***, *** *** be **** ****** (*-*' ****), ********* ** ******* ****.

***********

*********** ******** *** ********* ** ******** ****** **** ******* **********. Some ******* ***** ********, ** ******* ********** ** ****, ***** other *** ** ****, **** *** *******. **** **** ******* type (****, ******, *****, *********, ***.) **** *** *********** ******* beamwidth, *** * **** ******* ** ******* *** ********* ** each **** ******.

*********** *********

********* *** ****** ******* ******* ** **** *******, *** *********** comes **** ** ***** *********:

  • *************** ******** *** ******* ** *** **, ********* ****** ** no *********, *** ***** *** ******** *****. **** ****** ** used **** **** ******** ** ******* ******** ******* ** * base *******, *** *******.
  • *********** ******** **** ** ***** *** ****** ******* ****** ***** performance *** ** ***** ******** **** *******. **** *** **** commonly **** **** ** ******** ******** *** ***** ***** **** all-in-one ******. **** *** ***** ** ***** ** ***** ******* of ********* **** ******* ****** ******** ******** *** ******, *** are ********* ** ***** ******* *** ** ****, ****, *** vibration.
  • ****** *********** ******* **** ** ********* ******* *** ********* ******, but *** ********* ** *** *** ** ***** ****** *********, often ********* *********** *********** ** *******. ***** ******** *** **** often ***** ***** ******, ****** ******** ******, *** ***** **** complex *****, *** *** **** *********** ** *********** ****** *** to **** ** ********* **** ***** *****.

Antennas *** ****

**** ** ********* ******* *** ****** *** ****, ********** **** being *****, *** ******* *** ****** *** ******** *** **** likely ** *** **** **** ************. *************** ******** *** ***** as *** ** *** ***** *********** ******** *** ** **** or ******.

Free ***** **** ****

** **** *******, ** ********* *** ****** ** ******** *** how *** * ****** *** ********, *** *********** **** ***** path ****, *** ****, ***:********: ** *** ******** ************.

*** ******* **** ***** *** *** *** *** ******** *******:

  • *** ********* ***** ****: ****** *** *********, *** ******* *** can ** (*.*., *.****, ********** **** *****, *** ******* ***** than *.****).
  • *** **** ** *** ******** ***** ****: *** ****** *** gain (*.*., **** ******* ** ****), *** ******* *** *** go.
  • *** *********** ***** *** ******** ********. *** ****** *** *****, the ****** ** ** ** **** *** ********* **** ********* is ********* (*.*., -***** ** -***** *** ****** ********* ******).
  • *** ************ ***** ** *** *****. **** ************ ******** ******* use ******** *********** ***** *** *** **** ***** *** ** put ***, ************ *** *** *** ****** *** ** (******, e.g., * ** ******* ***** ** ************* '********' *** ************* at **** ***** ***********).

******* ** *** ******* ************ ******** ** ****,** **** ****** ************** **** ***** ****, **** **** ********* ********, *********, ******* and ***** ***********, *** ******** ***********. *** ****** ** *** of ***** *********** *** * ****** *.* *** **** ** ***** below.

Obstructions & **** ** *****

****** **** *********** *** ********* ************ ****** **** ******, ******** links ****** ******* **** ***** **** ** ***** (***) ******* radios *** **** ***********. ************ ****** *********** ** ***** *** ways:

  • **********
  • **********
  • ********* ***********

**** ** **** ** ***********, **** ** *** ****** ** absorbed ***/** *********, ******** *** ***** ** ****** ******** *** receiving ***. *** **** ******* *********** ******* ** *** ********. For *******, ******* *** **** ***** (****** **** *** ****** construction *********) ****** ********** ****** ******. ** ********, ***** ********, brick, *** ***** ************ ***** ** ***** ********* ****** *** reflect **** **** *****, ********* ** **** ***********.

********* ** * ******* ********** ** *** ****** **** *** intended ****, ********* ** ** ***** ******** *** ** **** with *** ******** ***-********* ************, ******** **** *******. ****** ********** surfaces **** ** ***** *** *****, ** **** ** *******, are ***** ** ********* *********** **** ** ******* ******.

Frequency *********

********* ******* ******** *********** ** *** ****:

  • **********:****** ***, *** ****** *** *********, *** ****** *** ******* theoretical **********. **** ********* ****** *** ****** ******** * **** speeds, ***** ***** *********** *** ******* ** *-* ****.
  • ***********:*** ** ***** ****** **********, ***** *********** *** ****** **** to ********* *** ******** ******* ** ***** *********. *** *********** (900 ***, *.* ***, ***.) *** ******** ** ***-**** ** sight (****) ************, ***** ** ** ** *** **** ********* radios *** *** *********** ******** ** **** ** *** *** to ******** ** *** ***.

******* ** ****, ***** **** ********* ******** *** ******* ******** throughput, ********* ** *** ******** ************ ****, *** **** *** possibly ** ********, *** *** ******** ********* ******* *** **.

***** *** *** *********** ********* ** *** ** ************ *******:

*.*/*.* ***

***** *********** *** **********, **** *** *** ** ******, *** most ***** **** ** ******* ************ ************ **** ** ********** cameras ****** * ******* ***, ******* *** *********, ***. ********** varies ********* ** ************ ********** *** ****** ** ****** (*** MIMO, *****) ****, *** ** ********* ** *** ***** ** ~25-40 *** ****** ******, *** *** ** **** *** **** models.

*******, ***** *** ***** *** **** **** ** ***.** (*/*/*/*/**) networks ** *** ** ***** *** ********, ********** *** ********* for ************. *.* *** *** ********** **** ****** ** ************ as ** *** **** ******* **** *** *.* ****, *** with ***.*** (*** *** ***.****) ****** ****** ****** ** **** home *** ********** ********, *** ********* *** **** ******* *******.

*.* *** *** ** **** ** ******* ** ***** ********** non-line ** ***** ************, ** ** *** ********* ********* **** as ***** **** *****. *******, *.* *** ********* ******** **** of *****.

************, *.* *** *.* *** *** **** **** ** ********* obstacles **** ***** ***********, ****** **** ** ***** (***) *** when ********* ****** ** ***** *****. ** ************ ***** ************, 5.8Ghz ** **** ********** **** **** *.**** ** ** ** relatively **** *******.

*** ***

*** *** ** *** **** ****** ***-**** ** ***** *********, and ** **** ***** **** **** ******* ** *** **** a ***** **** ** *** **** *******, **** ** ***** or ***** ***** **** ******* *****.

*** ***** ********* **** ** ****** **** ** ********* ********* than *.* ** *.* *** ******. **** *********** ***** **** a ********, *******, ** *** *** ******** ***** ********* **** much ***** ********** **** ****** ***********, ** *** ** * few **** ** **-** ** *******.

*** *** **** ********* ****, **** *.* *** *.* ***, is **** ******* *** *** ********** ************ ******, ** ** is ******** **** ** **** ******** ********, **** ** ******** phones *** ********* *****.

******** *****

**** *********** ** *** ******** ******** *** ******** *** ****** safety ***. ** *** **, *.* *** ** ********* *** this ******, *** ***** ******** (*********, *** *** ******, ********** entities) ******* ** ****** ****** ** **** **** **** ***** for ***. ***** ********** *** ******* ********* *****.

******* *** ********* ********* *** *** *** *** *.* *** band *** ** **** ******** ** **** ****, ************ ****** are ******** ******** ** ********** ***********. ******* ** ** ********** to ****** ****** ***, ** ** **** ***** **** ** city ************, **** ** ****** *** ***** ********* *********.

***** ********* ***********

***** *** *** ***** ***** ** ****** ***** *** ******* use ** ************:

  • ** ***** *****:* ****** *********** ** ********,** ***** **************** **** ***** ****** ** ** ******** ******* *** ** 2010. ***** ****** *** *********** ** *** ***/*** ***** ***** were ******* ** *** ****** **** ****** ** ******* ********* TV. ***** **** *** ***** *********** (******* ** *** *** MHz), ***** ***** ****** *** ****** **** ** ********* *********, but ********** ** ***** **** **** *** ***, ******* *** at ***** ** **/* ** ********* ********* ******* *******.
  • >* ***:******** ****** *** **** ********* ** * ****** ** ********* ranges ***** *.* ***, **** ** **, **, **, ** 80 ***, **** **** ********* ********, ******** ** ** * Gb/s. ***** *********** *** **** **** *********** ** ************ *** to ************* ********** **** ** ****, ****, *** ***, *******, and *** ********* *** **** ** ************ ******* ** ****.

MIMO ******

****, ***** *** ******** ** ******** ***, ******* ***** ****** across *** ** **** ***** ** ******** ********* *** ********** to ************. **** ****** *** *** *** ** **** ******** antennas, ** **** ******** * ****-********* *******, ***** ********* **** of ***** ******* ** ****, **** *** ********** ******* ** degrees. **** ***** *********** ****** ****** ****-********* ********:

Bandwidth ********

************* *** **** ********** *** ****** ********* *************, ********** ** frequencies ********. *.* *** *********** *** ***** *** ********* *** affected ** *** *** *** **** ****** *******, **** ** heavy **** ** ********** ****. *********** ***** ****, *******, *** be ******** *******, *** **** ****** *** ** **** *** critical ************ *****. ***** **** *******, ****** ******* ** **** conditions, **** ** ******* ******* **** *** **** ** ************, or ******** ******** ******** *** ***** ************ ******, ********* *********, or ******** **** ** ****.

************ ********* ******

** ******* ***** ************ ********* ******. ** * ******* **** of *****, ******** ********* ********* ****** ** **% ** **% when ********** ********* *** **** ***** ************ ***. *** **** news ** **** **** **** **** *******, ******** ********* **** for * ****** ** ****** (~*-* **/*) ** ********* **** to ******* ** * ********* *** ****. *******, ** ******** video ******* *** ****** *** **** *******, **** ******* ********** and ******* ******* ********.

Transmission *****

***** *** ** **** *** **** ***** *** ************ ***** in ******** ********. ********* *** ******** ** ****** **** ** obstructions, ********* ****, ************ *****, *** ******* ****.

** ******* ************* ***** **** ** ***** ** ********, **** as ******* ****, ******** ** *** **** ** * ********* when ******** ******** ** *** ** **** **************.

*******, ***** *****-**** ******** ***** *** ****** ******** **** *** right *********, **** ***** **** **** *** ************ ******** ** these ********* ***********, *** ****** ***** ****** **** ********** **** the ************ ** *********** ***********.

************, *** ****** *** ****, *** **** ******* ******* ********* must **, ****** ************ **** *********. *****-**** ***** **** **** take *** ********* ** *** ***** **** *******, ** ** may ****** ** ******** ** ******** ************ ** **** ******, as **** ****:

Wireless ******** *** ***** ************

***** ******* ****** **** *****-** ********, ********* ************ ******* **** use ********** ******** ********* ******* ** ****** ** ******* ** a **** ** *** ******** ******.

** *** *****, ***** *** * *** ** ***** *** interest ** **** ********** *** *** **** **** ($*,***+ *** link *** ******) *** ********** *** ********* **** ****** ** high-end, *********** ********. **** ******** ************ ***** ********* ****** *** or **** *******, ********* **** ***** **** ******* (******** ** the **** ******). *** **** ** ******** ******* ***********, ***:******** ******** ***** ************ *************.

***********

******* ******** ***** *** ********* ** ************ ** **** **********, routine *********** ** * *** ******* ** *** **********. ******* alignment ****** ** *******, ********** ****** ** ******* *** *********, foliage ** *** **** ** *** **** ****** ** *******, and ****. ** ******* ***** ****** **-***** ** *********** ************ ***************.

Test **** *********

**** **** * ******** **** ***

Comments (14)

**** *****. ******!

* *** ********* ** ***** ** ****** ***** ****** ** 'cloud', ********* *** ********* ******? * **** ** * *** technology ***** *** ********* *** *** **** ******* ****** **** their ******** ******** ****** ****, *** *** ***** *** *** solutions *** ***** **** **** ******** *** ******** ************ ************ for ***** ************?

** ****** ***** ***** ** ** ****** ********/**** *******, ******'* that ** ** ****** ** ********?

** ****,

* **** **** ***** *******. * ***** **** **** * few ****** / ***********:

* ** **** ** ********** *** **** ** *** ****** signal, * *** ****** *** ***** *********** ******** ** *****'* congested ******** *********** ** ** ****** *** ****** ** ******** signals ** **** *********. *** *** **** ***** * **** neighbour ** ******** *** ************ ********* ** **** *** *********.

* ***** **** ***** **** **** ** ****** ** *.**** and *.****

* ***** ***********, **** ** ******* - * **** ********* receiver ***** **** ************ *****. ******* ***** *********** ** ******** ** ******** *** a ***** ****** ***** *** * ****** ******* ***** **** a ****** *** (*.*. -***** ** * ***** ****** *** indicates ****** *********** **** -*****).

* ***** ** ** ** ** ********* ********* (*** ** is ********* ** *** ***** ******* ********** *** ****), ******* a ***** *********** ** **** ******. ********* ***** ******* **** over **** *** ** *********** ********* *******. *** **** ****** is ** ***** ****** ** ****** ***** ** ** **** planning ** ******* **** ********* ******* ******* ** **** **** at **** ****** ****. *** ******* *** **** ****** *** less ****** **** **** **** *****. *** ****** ** **** margin *** **** ** *** ******* **** **** ******** *** various ***** *******, *** ******** *** ***** ******* ************ ** predict **** ** ********. ******* ** ******* ***** - *** up ** *-* ***** - ** *** ********** ***** ** is ****** **** ** **** *** * ******* **** ****** of ****.

* * ***** ******* ***** *** **** **** ********* *************** are ** ********. *** *** ** *** ********* ** ******. Nor ** *.**** ** **** ******** *********. **** ** *** the **** ****** ******** **** ** *.****.

* * ***** *** ** ****** ** *** ********** **** frequencies ***** **** ****** *** ** **** *** ******** ************ applications. ** **** *** ******** ***** ******** ***** ******* ** cameras * ***** ******** ********* *** *** ** >***** ***********. Since ***** *** ******** ***** *** *** ****** ********** ***********-**** operation *** *** *** ********* ** ******* ** **** ****** effective ***** ******. **** ************ **** ******** *** ************ *** can ******* ******* ************** **** ** ****** ** **.**%.

******

**********: * ** ** ******** ** ********* ********, * ************ of ******** ********* *** ** *****.

***** ************ ** ******** *** ** *****!

*** *** ******** **** ** **** ******** ***** ****! *** should *** ** ****** ** *** **** ********** ** **** quiver. ** ** *** *** ** ** **** ****** ************* to *** ******* ** * ********’* ****, ******** **** ***** for **** *** *** *** ******.

**** **** **, *** ***’* **** ** **** * ***** about ******** ** *** ** ** *** ******! **** ** your ********* ******** ****** (******…******) *** ***** **** * ***-***** Engineer ************. **** ****** **** **** ***** ***.

*'* ******** *** ** * **** *** ******* ** ********* show *** *** *** **** ******** ** ******* ** ****: If * **** ** ** ****** ****** ** * **** in * ******* *** *** ** ***** *** ** *** it **** ** *** ****** *** ***** **** ******** (********* is *** ** ******)- **** ** * ***? ********** * search ***** ** **** ** ** **** **** *** ****'* not **** *'* ****** ** **. *** **** ** ***, Comnet *** ** ******* **** ***** **** *** * **** a **** *** **** ****** ** * **** ** ***** $2k ** ****'* **** *** ***** ** ** ******** ****** wise. ** ** *** **** ** **** **** * ***** think ******* *** ******* *** *** ** **** ****** **** WiFi ******* * ***** ******* ********** **? * ******* ********* to ** ******* ** ** ****** *** ** *** **** them ** ** ****** *** **** ** * **** ********* project *** * ***-****** *** * ****** ** **** **** a ***** *** ******. ** * ****** ********** ** *** I **** ***** $*** *** **** **** *** ******* ** transmitting *** * ******* ******* (* *** ****) *** ****. Any *********** ** ** * ******** *** **** **? **** disclosure ** ** **** *******: *'* *** ** ******** ** technical ***** ****** :)

******,

* ******* * *** ********** *** ***** * **** ****** here:******** *** ** ****** *******?

****** ******* ** *** **** **** ** ** *** ** a ******** ***********. *** ***** ******* **** ****** ******* ** IP ***** ********, ** ******* *** ******* **** ** *******.

*** * **** ** ******** ****** ($*** *** * ****, not $****)

*** * ****** *** ****** *** ******** ******* *** ******.

** ** ******** ** ******* * *** ****** ***** * wireless *******?

** *** ****** ** ****** *** *** ***'* **** * hair **** *******, **********.

** ** ******** ** ******* * *** ****** ***** * wireless *******?

*** ******* ** **** *** ******* *** **** *** **** are **** **** ********* ** ******* **** ** ******** ** trying ** ******* ****.

** ********** *** ** **** *** *** **** ** ** a *** **** ******* **** ******* ** ******** ******** ** handle ****. *** ****** *** ***** ** **** **** **** with * ***** ******.

***** *** ****, * **** **** **** **** *************.

* **** **** **** ** ** ***** ***** *********** ***** up **** *** ********** ** ******* (** ** *** ***). So *** **** *** ** ***** ******* ******** ** ******** in ***** ******? ** ************* ****** *** *** ********* **** the ******** ****** ** *** *** ** **** ******** ************ back ** *** ** *** **** *** ********** ********? *** owns **** ******** ***?

***, *** ** ***** ***** *********** *** ********** *** ** one **** ****. ****'** ********* ** *** *** *** ******* uses. ******** **** **** *** **** ********, *** *******.

** *** *********** **** ******* ********, *** ***/** *** ** the ******** ****************, **** ******* *** ********* *** ***. ***** ******** *** how **** ****** ********* ** ********** ********, ** ***** *** a ****** ** ********** **** ****** **** **************, ************ ******.

**** *********, *'* ******** * ****** ********* **** **** ****'* really **** ********. **********, ** ***** ** *** ******** ********, it's ******* ** ******* ******* *** **** (*.*., ********) ****** to *** ** * ******** **** ** ******* * $****+ base ******* *** **** **** *** ********* ** * *** of *****.

****** *** *** *********** *******. * ****** ******* ***** *** only * *********** **** ** ********, *.* *** *** * GHz. ****'* **** **** ***** *** **** ** **** ***** frequencies ***** *** ** ****.

** ******* ***** **** ** *** ****** *******, **** ******** several ******** ***** *** ******* ******** *** ****** *** ****** deployment. ** **** *** ***** ******* ** ***** **. ***** wireless ***** ******* **** *** *** ****. *** **** ***** though ** ** ******* *** ** **** ****** ** *********** and *** ***** ********** ****** **** *********** ******** ***********.

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