Delivering Internet, Voice, and video security wirelessly in
Transcript of Delivering Internet, Voice, and video security wirelessly in
Delivering Internet, Voice and VideoSecurity Wirelessly in Hospitality
The Speaker
• 23 years in Networking• First Half doing Integration• Second Half on Products• 7 years building Wi-Fi products
The Audience
• Property owners• Hospitality Technology professionals• System Integrators• Solution providers
Goals for Presentation
• Requirements for Internet, voice and video surveillance• How video and voice changes the game• Equipment used• How to build the infrastructure to support all three
What are your Video surveillance needs?
• Control video cameras in real-time
• Snapshots• Leads to bandwidth
requirements
IP Cameras
• Pan/Tilt/Zoom• 1 Mbps for live streaming
video• Ethernet or wireless client
interface
IP Camera connection to network
• Connect directly to mesh node (best)• Connect wirelessly to access point• Video control unit on LAN
Voice over Wi-Fi
• Support staff phones and/or guests
• Voice handset with Wi-Fi• Server on the LAN
Latency and Jitter
• Latency = total packet delivery time – Needs to be 100 ms or less
• Jitter = variation in latency, i.e. difference between fastest and slow packet times
• Low jitter is most important for voice
Evolving infrastructures
Hardwire >> WDS >> mesh
Wireless Mesh
• Outdoor resorts• When you cannot
run wire
• Reliable and self-healing• Self configuration
Not practical to run wire• Mesh penetrates floors and provides redundant backhaul
Outdoor resort• Mesh nodes are on top of each building
Video changes the traffic model
• More upstream traffic
• Cannot tolerate choke points
• Use multi-radio mesh
Voice changes the radio model
• Need low latency• Predictable
delivery times (jitter)
• Limit the numberof hops
• Use multi-radio mesh
Multi-radio mesh design• 25 Mbps radio to radio
Multi-radio mesh design
25 Mbps throughput end-end
Number of gateway nodes
1 Mbps x #cameras / 25 = #gateway nodes
How to build the Mesh
• If you have set up Wireless Distribution System (WDS), you can set up Mesh
• Design your network. What to cover, nodeplacement
Provisioning• A few menus
– Enter MAC addresses– Optimize for distance
(ACK timing)– Channel selection
• Nodes configure themselves
Different Spectrums• 802.11a is BEST choice for mesh
– Line of sight (LOS) only. High throughput and reduced chances of interference
Different Spectrums• 802.11b/g is OK if non line of sight• Good penetration• More interference due to conflict with client access
Different Spectrums• 900 MHz powerful when used appropriately
– Great penetration for Non Line of Sight (NLOS)– Very vulnerable to interference from other devices (cordless phones,
remote controls)– You must do a real spectrum survey of 900MHz devices in and around property
Access into the Mesh
• One radio must be shared by multimedia – don’t stumble in the last 50 feet!
MultiSSID APs for access
• Multiple SSID’s on one radio.
• Use QoS to give voice and video highest priority.
Dual radio APs for access
• One radio can be dedicated to video or voice with hidden SSID.
Benefit of High RF Output• Better signal strength and throughput• Bigger safety margin against interference• More flexibility in placement
“Resort International”
• 20 buildings• One multi-radio mesh
node per building• 5 GHz for backbone• Four gateway nodes
(100 Mbps to video server)
• Video and voice changes wireless infrastructure requirements beyond just Internet access
– However they can be shared on the same wireless infrastructure with Internet• Design a high throughput and low latency multi-radio mesh• Use multi-SSID APs or multi-radio APs to insulate your voice and video
from the vagaries of laptop users
Conclusion