Network Convergence
Transcript of Network Convergence
2008 Asia-Pacific Members’ Meeting & ConferenceSeptember 22-23, 2008
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ConvergenceConvergenceHow to build a converged hotel networkHow to build a converged hotel network
Ruxiang JinRuxiang JinNetwork ConsultantNetwork Consultant
Hotel wiringNetwork architectureNetwork technology Network upgrade Performance, Cost
Ruxiang JinNetwork consultant for HSH. Over 20 years of experience in telecom/networking industry. Worked as professor/CEO/CTO at universities, government labs, and high tech companies. Designed and built various national backbone, metro, access, and last-mile networks. Chaired Asia communications conference (AOE) and European communications conference China site (ECOC). Over 70 publications/patents.
Ask not what is available from vendors, ask what you want.
Infrastructurewiring: fiber (FTTR), fiber+RJ45, RJ11, coax
Architecturenetwork topology: tree (coax), star, mixture
How to build converged network on existing infrastructureon fiber networkon RJ45/RJ11 networkon coax network
TechnologiesVLANEPONWDMEOC
Challenges Faced by Hotel Network OperatorsHow to chase fast moving targets
1. Increased Diversity of Network Services
2. Network Security
3. Scalability in Bandwidth
4. Quality and Reliability of Service
5. Cost of Operation and Maintenance
6. Future
Existing ServicesAnalog/Digital TVFixed/Mobile Phone Broadband InternetVideo SurveillancePMSRoom Control (lighting, air conditioning, etc)VODBackground Music
New ServicesIPTV (personalized TV service)Internet Radio (personalized radio service)VOIP (free calls, calls to PC, etc)HDTV
WiFi Phone/Video (watch video anywhere, anytime)Video Conferencing……
Increased Diversity of Network Services
Hotel Multimedia Network System Should ServiceHotel Multimedia Network System Should ServiceThree Major Displays: TV, PC, CellphoneThree Major Displays: TV, PC, Cellphone
Watching CNN using wireless laptop and cellphone at cafe:
Interactive Multimedia Network Demands Interactive Multimedia Network Demands Huge BandwidthHuge Bandwidth
Quantifying bandwidth requirementsQuantifying bandwidth requirements
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Ban
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Voi ce WebBrowsi ng
MPEG-4Vi deo
MPEG-2Vi deo
CompressedHD Vi deo
Appl i cati on
Bandwi dth Requi rement
Expect >3 video screens per room soon!
IPTV Stream ( 2M , DVD )
HD IPTV Stream ( 8M , HDTV )
Effective bandwidth per room: Much higher BW than web browsing!
Internet bandwidth per room: 0.5M
10X expansion :
Converged Network Architecture Considerations
Major Trends/Assumptions:
Everything digitalEverything over IP (IPTV, VOIP, all control, data)Bandwidth requirement always going upCost of copper/cost of fiber keeps going upTV will become a personalized media
Converged Network Architecture Considerations
Keep things simple!
Existing Hotels:
Fiber to floor, copper to roomStar topology for fiberStar topology for RJ-45Tree topology for coax with CBA
New Hotels:
Fiber all the way (to room)Some copper for backup
Optical Fiber Cable(no re-wiring needed in the next 100 years)
Takes less space than other wiring,and provides much higher bandwidth.
Single Mode vs Multimode Fiber
Multimode:50/125 or62.5/125
Single mode:9/125
Signal Loss in Single- vs Multimode Fiber
Single Mode:
Multimode:
Modal Dispersion in Multimode Fiber(dispersion limits data rate and degrades SNR)
Conclusion: Use Single Mode Fiber
Single mode fiber performs much better in terms of bandwidth, signal-to-noise, attenuation, etc.
Single mode systems are much easier to design in terms of optical power budget, bandwidth, range of components, etc.
Most important technology developed over the past 10 years, including WDM and PON, are all based on single mode.
Single mode costs less than multimode now, removing the only reason for multimode.
Network Wiring Topology Considerations
CO
Room
Room
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Star (Cat-6 cable)
CO
Room
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Tree (coaxial cable)
Fiber Network Architectures
Ethernet Passive Optical Network (EPON)
EPON TDM
Wavelength Division Multiplexing (WDM)
Each wavelength travels independently in fiber.
WDM Technology
Fiber Network Architecture Example
All Passive Floor Distribution(passive = reliable)
Fiber-to-the-Room (FTTR)
Network capacity upgrade: using existing fiber plant, up to 16X capacity increase with increased network efficiency by constructing various logical network topologies.
IP-over-WDM
Simultaneous delivery of multiple analog and digital channels (analog/digital TV and data) with different protocols and data rates.
Mode conversion btw single mode and multimode fiber.
OPN: multiple isolated networks on the same fiber plant, physical layer security without adding wires, immune to hackers.
Can upgrade network by simple adding wavelength ports,without affecting existing services.
WDM + VLAN
Much better security and higher performance than VLAN.
WDM+VLAN Example
Automatic Protection Switching
Protection against:
equipment failureperformance degradationline break
Network recovers within milliseconds using optical switchNetwork recovers within seconds using soft switch
Automatic Protection Switching Examples
Active Floor ODF Bandwidth Calculation
For hotels with fiber to each floor, RJ-45 to each room:
Fast Ethernet switches with 1G uplink and 100M ports SD and compressed HD IPTV (with video surveillance):say 20M per room, 30 rooms per floor, 20 floors:
BW per floor = 600MSo 1G per floor is OK for compressed HD IPTV
50-100M per room will be needed in the next few years as the number of HD video screens increases.
Features: Simultaneous delivery of analog/digital/IPTV/Data in the same coaxial cable, without changing the existing cable plant, greatly simplifies SD IPTV deployment. Simple to install, plug-and-play, fast deployment, no re-wiring. 100M bandwidth shared among 10-20 rooms. Data port compatible with switches, routers, IP STBs, PCs, etc. Supports full and half duplex mode
Coaxial Broadband Adaptor for IPTV(Using existing coaxial cable plant)
Applications: Triple-play convergence, hotel network and service upgrade. Especially useful for older hotels that does not have RJ-45 to each room.
TV Channels (65-865 MHz)(downstream, QAM)
Data Channels (2-35 MHz)(bi-directional, OFDM)
Transforming Existing Cable TV Network into IP Network
Converting Coax Cable Network to IP Network
Fibers Do’s and Don’ts
For new installations, use single mode fiber
Always use mouse-protected cable
Use a secondary connector (disposable)
Do not bend too hard (glass will break!)
Do not look into fiber from connector end
VLANs
VLAN = Virtual LAN (broadcast domain created by switches)
Trunking protocol = ISL or 802.1Q
Reason to use VLAN: Higher performance by limiting broadcast packetsBetter securityBetter management
VLAN Application Example
Set all user ports to nontrunking
Deploy port security when possible for user port
Put DMZ servers into PVLANs
Configure VACL on primary VLAN
Use authentication for VTP
Disable all unused ports and put them in an unused VLAN
Some VLAN Do’s and Don’ts
Private VLANs(for better network security)
PVLAN Port Types
Separation of ports without requiring a separate IP subnet for each device
Isolated ports can talk only to promiscuous ports
Promiscuous ports can talk to any port
PVLAN in DMZ can prevent attack to spread to many servers
PVLAN Features
PVLAN in DMZ
In DMZ:Servers should connect to isolated PVLAN portsRouters and firewalls should be connected to promiscuous ports
Use VACL – VLAN access control list
Limitation of PVLANs: PVLANs only works at Layer-2 so a router can route traffic btw isolated ports.
VACLs configured on primairy VLANs drops traffic with a source and destination address within the same subnet.
VACL has no performance penalty
Overcoming PVLAN Limitations
Lorica Network Example
Control4 Zigbee Control Panel
Network Management
NE management software integration
easy to operatepinpoint troublefast response to alarmsanticipate and prevent problemsreduce maintenance and operation costeasy network upgrade
Conclusion:Building a converged network is like cooking: all the ingredients we need are available today, we just have to know exactly what we want to deliver for the guests, and do it right within our budget.
Thank you.
Ruxiang JinTel: 011-86-13816516337 (China) 001-678-200-2224 (US)
Email: [email protected]
2008 Asia-Pacific Members’ Meeting & ConferenceSeptember 22-23, 2008
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