MeshDynamics Mesh Networks - Video Surveillance

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MeshDynamics provides the network infrastructure to make a fully distributed IP surveillance system possible for cameras, video servers, storage clusters, custom applications and remote viewing to be located in any location.

The Department of Homeland Security (DHS) and SPAWAR engineers selected MeshDynamics Wi-Fi mesh nodes to provide remote video surveillance for stationary and vehicle mounted cameras along the US national border. IP cameras are connected to the MeshDynamics MD4000 mesh nodes transmitting high resolution real time video over the mesh network to the base station video monitors. Live video feeds from the IP based cameras is also available via the MeshDynamics mesh network to patrol vehicles with wireless access. Mobile nodes mounted in security forces vehicles join the network dynamically and while in motion. Service radios in the vehicles provide connectivity for staff in vehicles and operating nearby. In similar applications, UK, Israeli and Canadian defense agencies have also selected MeshDynamics for wireless video surveillance applications in those countries

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MeshDynamics Mesh Networks - Video Surveillance

  1. 1. THE MESHDYNAMICS MD4000 IS THE IDEAL MESH NODE FOR VIDEOAND SURVEILLANCE APPLICATIONS. ITS COMPACT SIZE ALONG WITHSUPERIOR TECHNOLOGY AND EASE OF USE MAKE FOR A SWIFTINSTALLATION AND EFFORTLESS OPERATION.VIDEO APPLICATIONS TEND TO BE BANDWIDTH-INTENSIVE. MANYWIRELESS SYSTEMS SUFFER FROM JITTERY VIDEO DUE TO LACK OFAVAILABLE BANDWIDTH TRANSFERRED ACROSS THE BACKHAUL. THEMD4000 USES THIRD GENERATION MESH TECHNOLOGY TO MAINTAINBANDWIDTH OVER NUMEROUS HOPS WITHOUT DEGRADATION. COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  2. 2. THE THIRD GENERATION BACKHAUL OF THE MD4000 USES MULTIPLE CHANNELS SIMULTANEOUSLY WITHIN THE UTILIZED SPECTRUM IN ORDER TO ENSURE MINIMAL BANDWIDTH LOSS AS THE NUMBER OF HOPS INCREASES. TYPICALLY, THE 5GHz SPECTRUM IS USED FOR THE BACKHAUL. SINCE DIFFERENT 5GHz CHANNELS ARE USED BY ADJACENT LINKS IN THE MESH, THERE IS NO INTERFERENCE ALONG THE BACKHAUL. THIS ALLOWS EACH NODE TO SEND AND RECEIVE AT THE SAME TIME. THEREFORE CONSERVING BANDWIDTH OVER MANY HOPS. ROOT NODE SEND/ SEND/ SEND/ SEND/ SEND/ SEND/RECEIVE RECEIVE RECEIVE RECEIVE RECEIVE RECEIVE COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  3. 3. FIRST AND SECOND GENERATION MESH NODES USE ONLY ONE CHANNELOF A CERTAIN FREQUENCY SPECTRUM ACROSS ALL LINKS OF A BACKHAULDURING OPERATION.A NODE IN THE MESH CANNOT SEND AND RECEIVE AT THE SAME TIMESINCE THE SAME FREQUENCY IS USED FOR BOTH FUNCTIONS. THIS MAKESFOR A VERY INEFFICIENT PROCESS THAT SEVERELY EFFECTS BANDWIDTHAS THE NUMBER OF HOPS INCREASES. THE NUMBER OF CAMERAS THATCAN BE INSTALLED ONTO A NETWORK IS THEREFORE LIMITED.VIDEO APPLICATIONS CAN START TO ENCOUNTER ISSUES AFTER ONLY AFEW HOPS IN FIRST AND SECOND GENERATION MESHES. ROOT NODE NODE NODE NODE NODE NODE NODE SEND RECEIVE COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  4. 4. FIRST AND SECOND GENERATION MESH NODES USE ONLY ONE CHANNELOF A CERTAIN FREQUENCY SPECTRUM ACROSS ALL LINKS OF A BACKHAULDURING OPERATION.A NODE IN THE MESH CANNOT SEND AND RECEIVE AT THE SAME TIMESINCE THE SAME FREQUENCY IS USED FOR BOTH FUNCTIONS. THIS MAKESFOR A VERY INEFFICIENT PROCESS THAT SEVERELY EFFECTS BANDWIDTHAS THE NUMBER OF HOPS INCREASES. THE NUMBER OF CAMERAS THATCAN BE INSTALLED ONTO A NETWORK IS THEREFORE LIMITED.VIDEO APPLICATIONS CAN START TO ENCOUNTER ISSUES AFTER ONLY AFEW HOPS IN FIRST AND SECOND GENERATION MESHES. ROOT NODE NODE NODE NODE NODE NODE NODE SEND RECEIVE COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  5. 5. ALTHOUGH MESHDYNAMICS THIRD GENERATION MESH NODESTYPICALLY USE THE 5GHz SPECTRUM FOR THE MULTI-CHANNELBACKHAUL, THE 2.4GHz SPECTRUM AND THE 4.9GHz PUBLIC SAFETYBAND CAN ALSO BE USED.THE 5GHz SPECTRUM IS USED MAINLY FOR TWO REASONS: THERE ISMORE AVAILABLE CHANNEL SPACE IN THIS SPECTRUM ALLOWING FORTHE MOST NUMBER OF CHANNELS TO BE USED, AND BECAUSE IT IS ARELATIVELY CLEAN RF SPACE WHICH CATERS TO SMOOTH, GLITCH-FREE VIDEO.THE 2.4GHz SPECTRUM IS USUALLY USED FOR THE BACKHAUL INRURAL AREAS WHERE GREAT DISTANCES ARE NEEDED, AND THE RFPOLLUTION IS MUCH LIGHTER THAN IN CIVILIZED AREAS.THE 4.9GHz PUBLIC SAFTEY BAND IS A LICENSED BAND RESERVED FORPOLICE AND EMERGENCY SERVICES. COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  6. 6. THE RIGHT-HAND ETHERNET PORT ON THE MD4000 MESH NODE SERVES ASSWITCH PORT TO NETWORK DEVICES. THE DATA FROM CLIENTS OR DEVICESCONNECTED TO THIS PORT WILL BE SENT WIRELESSLY THROUGH THE MESHTO THE MAIN NETWORK.THE MOST BASIC WAY TO CREATE A WIRELESS SURVEILENCE SYSTEM USINGTHE MD4000 IS TO SIMPLY CONNECT AN IP CAMERA TO THE RIGHT-HANDETHERNET PORT ON THE MESH NODE. COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  7. 7. THE RIGHT-HAND ETHERNET PORT ON THE MD4000 MESH NODE SERVES ASSWITCH PORT TO NETWORK DEVICES. THE DATA FROM CLIENTS OR DEVICESCONNECTED TO THIS PORT WILL BE SENT WIRELESSLY THROUGH THE MESHTO THE MAIN NETWORK.THE MOST BASIC WAY TO CREATE A WIRELESS SURVEILENCE SYSTEM USINGTHE MD4000 IS TO SIMPLY CONNECT AN IP CAMERA TO THE RIGHT-HANDETHERNET PORT ON THE MESH NODE. RELAY NODE ROOT NODE mesh dynanmics mesh dynanmicsNETWORK IP CAMERA COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  8. 8. IF MULTIPLE CAMERAS ARE NEEDED ON A SINGLE NODE, CONNECT A SWITCHTO THE RIGHT-HAND ETHERNET PORT, THEN CONNECT THE DESIREDNUMBERS OF CAMERAS TO THE SWITCH. RELAY NODE ROOT NODE mesh dynanmics mesh dynanmics SWITCHNETWORK IP CAMERA IP CAMERA COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  9. 9. TO DETERMINE THE MAXIMUM NUMBER OF CAMERAS THAT CAN BE INSTALLEDONTO A NETWORK, CAMERA SETTINGS MUST FIRST BE TAKEN INTO ACCOUNT.THE SETTINGS OF A CAMERA EFFECT HOW MUCH BANDWIDTH THE CAMERA WILLREQUIRE. THERE ARE SEVERAL SETTINGS THAT CAN BE APPLIED TO CAMERASSUCH AS FRAME RATE, RESOLUTION, AND COMPRESSION TO NAME A FEW.THE TABLE BELOW GIVES BANDWIDTH VALUES FOR SOME COMMON CAMERASETTINGS (640 x 480 RESOLUTION, MPEG4-30) WITH VARYING FRAME RATES.BANDWIDTH 1.4CONSUMED 1.2 1.0(Mbps) 0.8 0.6FRAME SIZE 0.4 10KB 0.2 9KB 8KB 7KB 10 20 30 6KB (FRAMES PER SECOND) COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  10. 10. THE 802.11a PROTOCOL, WHICH IS USED BY THE 5GHz BACKHAUL, CANSUPPORT ROUGHLY 22Mbps OF THROUGHPUT ON EACH OF ITS NON-OVERLAPPING CHANNELS. IF A CAMERA IS SET TO CONSUME 1Mbps OFTHROUGHPUT, THIS IMPLIES THAT AN 802.11a LINK CAN SUPPORT THEBANDWIDTH NEEDED BY 22 SUCH CAMERAS. TYPICALLY, THE NUMBEROF CAMREAS IS CUT BACK SLIGHTLY TO ALLOW FOR OTHER WIRELESSOVERHEAD ON THE LINK.IN ADDITION TO THE MULTI-CHANNEL, 3RD GENERATION BACKHAULOF THE MD4000 WHICH ENABLES IT TO CARRY THIS 22Mbps OVERNUMEROUS HOPS WITHOUT BANDWIDTH DEGRADATION, THE MD4000OFFERS FEATURES THAT CAN EVEN FURTHER INCREASE THEAVAILABLE BANDWIDTH ON THE NETWORK: BONDED CHANNELTECHNOLOGY, AND MULTIPLE DOWNLINK RADIOS. COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  11. 11. BONDED CHANNEL TECHNOLOGY USES TWICE THE CHANNEL WIDTH ASSTANDARD 802.11a/g CHANNELS (WHICH ARE TYPICALLY 20MHz WIDE),BUT GIVES TWICE THE THROUGHPUT OF THE STANDARD CHANNELS. ALINK USING BONDED CHANNEL TECHNOLOGY SUPPORTSAPPROXIMATELY 44Mbps OF THROUGHPUT. 22Mbps 20MHz WIDE OFDM CHANNEL MASK 5745 MHz 5785 MHz 5825 MHz COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  12. 12. BONDED CHANNEL TECHNOLOGY USES TWICE THE CHANNEL WIDTH ASSTANDARD 802.11a/g CHANNELS (WHICH ARE TYPICALLY 20MHz WIDE),BUT GIVES TWICE THE THROUGHPUT OF THE STANDARD CHANNELS. ALINK USING BONDED CHANNEL TECHNOLOGY SUPPORTSAPPROXIMATELY 44Mbps OF THROUGHPUT. 40MHz WIDE 44Mbps OFDM CHANNEL MASK 5745 MHz 5785 MHz 5825 MHz COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  13. 13. MULTIPLE DOWNLINK RADIOS WILL GIVE A MESH MULTIPLE 22Mbps SOURCES OF BANDWIDTH. EACH DOWNLINK RADIO ON A ROOT NODE WILL PROVIDE A SEPARATE CHANNEL FOR RELAY NODES TO ASSOCIATE TO. WITH THE APPROPRIATE USE OF SECTOR ANTENNAS, THE MULTIPLE SOURCES OF BANDWIDTH CAN BE DISTRIBUTED ACROSS THE MESH. DOWNLINK Chn. B ANTENNA ( 22Mbps ) DOWNLINK Chn. A ANTENNA ( 22Mbps ) SIGNAL SPREAD ROOTDOWNLINK NODE ANTENNA Chn. B DOWNLINK ( 22Mbps ) ANTENNA DOWNLINK DOWNLINK ANTENNA ANTENNA ROOT SIGNAL SIGNAL NODE SPREAD SPREAD COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  14. 14. THE DIAGRAM BELOW ILLUSTRATES HOW DIFFERENT GROUPS OF RELAYNODES GET THEIR OWN 22Mbps SOURCE OF BANDWIDTH FROM EACH OFTHE ROOT NODE’S DOWNLINKS. ANTENNA SPREADS ARE SELECTEDBASED ON THE LOCAL DISTRIBUTION OF RELAY NODES.THREE DOWNLINK RADIOS ARE USED IN THIS EXAMPLE. ROOT NODE RELAY NODE DOWNLINK ANTENNA SIGNAL SPREADS CAMERA COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  15. 15. WHILE OTHER VENDORS OFFER ONLY A SINGLE DOWNLINK RADIOON THE ROOT NODE, WHICH CAN SEVERELY LIMIT THE NUMBER OFCAMERAS THAT CAN BE INSTALLED ON A NETWORK, THE ABILITY OFTHE MD4000 TO UTILIZE MULTIPLE DOWNLINK RADIOSALLOWS FOR A SUBSTANTIAL INCREASE IN THENUMBER OF NETWORK CAMERAS. ROOT NODE RELAY NODE DOWNLINK ANTENNA SIGNAL SPREADS CAMERA COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  16. 16. THE BENEFIT OF MULTIPLE DOWNLINK RADIOS CAN ALSO BE APPLIED TO RELAYNODES. A RELAY NODE’S UPLINK THAT HAS A BONDED-CHANNEL CONNECTION(44Mbps) CAN PROVIDE SEPARATE DOWNLINK CONNECTIONS OF 22Mbps TODIFFERENT GEOGRAPHICAL LOCATIONS. THIS IS ESPECIALLY HELPFUL WHENTHERE ARE NODE CLUSTERS AND SURVEILLANCE AREAS ARE THAT ARE NON-LINE-OF-SITE FROM THE ROOT NODE. ROOT NODE (downlink antenna) s bp 44 MOUNTAIN M M bp 22 s 22Mbps RELAY NODE COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  17. 17. THE BENEFIT OF MULTIPLE DOWNLINK RADIOS CAN ALSO BE APPLIED TO RELAYNODES. A RELAY NODE’S UPLINK THAT HAS A BONDED-CHANNEL CONNECTION(44Mbps) CAN PROVIDE SEPARATE DOWNLINK CONNECTIONS OF 22Mbps TODIFFERENT GEOGRAPHICAL LOCATIONS. THIS IS ESPECIALLY HELPFUL WHENTHERE ARE NODE CLUSTERS AND SURVEILLANCE AREAS ARE THAT ARE NON-LINE-OF-SITE FROM THE ROOT NODE. ROOT MOUNTAIN NODE node Cluster s bp 44 MOUNTAIN M M bp 22 s node RELAY 22Mbps clusterMOUNTAIN NODE COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  18. 18. THE COMBINATION OF THE THIRD GENERATION BACKHAUL AND SEAMLESSNODE-TO-NODE SWITCHING MAKE THE MD4000 MOBILE NODES IDEAL FORMOBILE VIDEO APPLICATIONS.THE MD4000 HAS BEEN TESTED AT 65Mph WHILE SENDING GLITCH-FREE VIDEOOVER 5 HOPS. DURING THIS TEST, AN AVERAGE OF 10Mbps OF THROUGHPUTWAS MEASURED. THE CONNECTIVITY OF THE MOBILE NODE WAS SET AT24Mbps IN ORDER TO UTILIZE THE ROBUST 16-QAM MODULATION SCHEME. ROOT NODE COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  19. 19. THE COMBINATION OF THE THIRD GENERATION BACKHAUL AND SEAMLESSNODE-TO-NODE SWITCHING MAKE THE MD4000 MOBILE NODES IDEAL FORMOBILE VIDEO APPLICATIONS.THE MD4000 HAS BEEN TESTED AT 65Mph WHILE SENDING GLITCH-FREE VIDEOOVER 5 HOPS. DURING THIS TEST, AN AVERAGE OF 10Mbps OF THROUGHPUTWAS MEASURED. THE CONNECTIVITY OF THE MOBILE NODE WAS SET AT24Mbps IN ORDER TO UTILIZE THE ROBUST 16-QAM MODULATION SCHEME.IP CAMERA COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS
  20. 20. THE COMBINATION OF THE THIRD GENERATION BACKHAUL AND SEAMLESS NODE-TO-NODE SWITCHING MAKE THE MD4000 MOBILE NODES IDEAL FOR MOBILE VIDEO APPLICATIONS. THE MD4000 HAS BEEN TESTED AT 65Mph WHILE SENDING GLITCH-FREE VIDEO OVER 5 HOPS. DURING THIS TEST, AN AVERAGE OF 10Mbps OF THROUGHPUT WAS MEASURED. THE CONNECTIVITY OF THE MOBILE NODE WAS SET AT 24Mbps IN ORDER TO UTILIZE THE ROBUST 16-QAM MODULATION SCHEME. Throughput 21.00 18.00 15.00 12.00(Mbps) 9.00 6.00 3.00 0.00 00:00 00:50 01:40 02:30 03:20 04:10 05:00 05:50 06:40 07:50 Elapsed Time (mm:ss) COPYRIGHT 2008 MESHDYNAMICS, INC. ALL RIGHTS RESERVED. DISCLOSURES PROTECTED BY MULTIPLE PATENTS

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