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